WO2011134176A1 - 镁合金板的连续高效铸轧成型方法 - Google Patents

镁合金板的连续高效铸轧成型方法 Download PDF

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Publication number
WO2011134176A1
WO2011134176A1 PCT/CN2010/072579 CN2010072579W WO2011134176A1 WO 2011134176 A1 WO2011134176 A1 WO 2011134176A1 CN 2010072579 W CN2010072579 W CN 2010072579W WO 2011134176 A1 WO2011134176 A1 WO 2011134176A1
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WIPO (PCT)
Prior art keywords
temperature
zone
magnesium
magnesium alloy
furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/072579
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English (en)
French (fr)
Inventor
陈学敏
叶清东
李建国
刘超文
余跃明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sun Xing Chemical and Metallurgical Materials (Shenzhen) Co Ltd
Original Assignee
Sun Xing Chemical and Metallurgical Materials (Shenzhen) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sun Xing Chemical and Metallurgical Materials (Shenzhen) Co Ltd filed Critical Sun Xing Chemical and Metallurgical Materials (Shenzhen) Co Ltd
Priority to EP10723472.6A priority Critical patent/EP2567760B8/en
Priority to US12/867,202 priority patent/US8220526B2/en
Priority to ES10723472.6T priority patent/ES2546096T3/es
Publication of WO2011134176A1 publication Critical patent/WO2011134176A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F27B14/061—Induction furnaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to the technical field of smelting, deformation and processing of magnesium alloy sheets, in particular to a continuous high-efficiency casting and rolling forming method of magnesium alloy sheets.
  • Magnesium or magnesium alloy liquid is active and easy to oxidize and burn. It has almost severe chemical reaction with all aluminum alloy refractories, and even a violent explosion. Therefore, for safe and reliable production, the protection facilities for production are essential. of. Magnesium or magnesium alloy liquid is abbreviated as magnesium melt.
  • the existing magnesium alloy sheet manufacturing process includes smelting, temperature control, casting and rolling processes, and full protection measures must be taken during the entire process.
  • the existing smelting adopts an electric resistance furnace
  • the temperature control also adopts a resistance furnace
  • the pretreatment of the magnesium melt before casting and rolling is realized by a double resistance furnace, and then casting and rolling.
  • the existing casting and rolling has a high fracture rate, and continuous casting and rolling cannot be achieved at all, and the temperature rise of the electric resistance furnace is slow, so the production efficiency is low.
  • the present invention provides a continuous high-efficiency casting and rolling forming method for a magnesium alloy sheet, which has a low fracture occurrence rate, improved quality, and improved productivity.
  • the present invention solves the prior art problem and provides a continuous high-efficiency casting and rolling forming method for a magnesium alloy sheet, the method comprising: sequentially setting an induction electric furnace, an electric resistance furnace, a casting roll and a multi-stage roll; and inputting metal into the induction electric furnace An element, the metal element is a magnesium ingot, or a magnesium ingot and an alloying element, and the metal element is melted into a magnesium melt in the induction furnace; the magnesium melt melted by the induction furnace flows into the resistance furnace through a pipe, And adjusting temperature in the resistance furnace; at least two temperature regulation zones in which the overflow is connected, the temperature difference between the temperature adjustment zones is constant; the magnesium melt passing through the resistance furnace passes The conveying pipe reaches the biting zone of the casting roll, and is formed into a magnesium alloy plate to be sent out; the temperature of the magnesium melt entering the biting zone is 690 ⁇ 10 ° C; the magnesium alloy plate is sequentially passed through In the multi-stage roll, the rolling surface temperature of each of the rolls and the temperature
  • the magnesium alloy sheet after being output by the multi-stage rolls is wound up by a winder.
  • the metal element is melted in the induction furnace, and then subjected to refining and deslagging treatment, followed by stirring uniformly.
  • the induction furnace and the resistance furnace are provided with a shielding gas.
  • the shielding gas is a mixed gas of SFe and C0 2 .
  • a zone dividing plate is disposed, the zone dividing plate and the resistance furnace body forming a plurality of the temperature regulating zones of the inner cavity of the resistance furnace; when the zone dividing plates are at least two At the time, the flow along the magnesium melt is set from high to low in the region, and the temperature control region passes through the space above the regional partition.
  • the temperature adjustment zone comprises a heating resistor unit, a heat dissipation unit and a stirring mechanism; the method provides a detection module for detecting temperature signals of each temperature adjustment zone, and a processing module for controlling a temperature range of each temperature adjustment zone; the processing module is based on the detection Temperature signal, determining temperature compensation in each temperature adjustment zone, and then sending a command to the heating resistor unit or the heat dissipation unit; the stirring mechanism of at least one temperature adjustment zone agitating the magnesium melt therein to uniformly distribute the metal elements; at least one The liquid level of the temperature control zone controls its smoothness and height, and the magnesium melt of the temperature regulation zone is output through the conveying pipe.
  • the wall of the temperature regulation zone is iron; the heating resistor unit is a heating wire and a ceramic tube of the outer casing, and the heating resistor unit is distributed in a part of the temperature regulation zone.
  • the temperature control zone is 2, 3, 4 or 5.
  • the temperature adjustment zone includes a first temperature adjustment zone, a second temperature adjustment zone, and a third temperature adjustment zone; the selected temperature range of the first temperature adjustment zone is 900 to 800 ° C; and the second temperature adjustment zone The selected temperature range is 800 to 700 ° C; and the third temperature adjustment zone has a set temperature of 700 ° C.
  • the conveying pipe is disposed near a bottom of the third temperature regulating zone.
  • a grain refiner inlet is provided at the conduit.
  • a temperature control module is arranged adjacent to the rolling zone for adjusting the temperature of the rolling table working face and the rolled magnesium plate to be entered into the rolling zone to meet the set temperature requirement.
  • the method includes at least two induction furnaces, and the two induction furnaces are connected to the resistance furnace.
  • the induction furnace is alternately connected to the resistance furnace via the valve.
  • the beneficial effects of the invention are as follows: Firstly, the magnesium ingot is melted by using an induction furnace, and the melting efficiency is greatly improved compared with the existing resistance furnace, thereby solving the existing magnesium melt forming efficiency. Slow bottleneck problem; Secondly, the temperature gradient control of the magnesium melt is used to ensure that the magnesium melt temperature entering the casting and nip biting zone is 690 ⁇ 10 ° C, at which the plasticity and continuity of the formed magnesium alloy sheet Good, at the same time, the magnesium melt between the temperature gradients is connected by overflow, which avoids the possibility of blockage using the pipeline, thereby improving the reliability of the method; finally, multi-stage roll rolling, continuous and efficient molding is required Specifications of magnesium alloy sheets.
  • FIG. 1 is a schematic structural view of a continuous high-efficiency casting and rolling forming method of a magnesium alloy sheet according to the present invention
  • FIG. 2 is a schematic flow chart of a molding method of the present invention.
  • a continuous high-efficiency casting and rolling forming method for a magnesium alloy sheet includes: an induction furnace 11, an electric resistance furnace 12, a casting roll 13 and a multi-stage roll 14; and an induction electric furnace 11 for melting therein
  • the zone is arranged in a cooling state; the magnesium melt passing through the electric resistance furnace 12 reaches the biting zone 18 of the casting roll 13 through the conveying pipe 17, and is formed into a magnesium alloy plate; the temperature of the magnesium melt entering the biting zone 18 is 690 ⁇ 10°. C; the magnesium alloy plate is sequentially passed through the multi-stage roll 14, in the rolling zone, the rolling surface temperature of each roll and the temperature of the rolled magnesium plate are in the range of 250 to 350 ° C, and along the axial direction of the roll The temperature difference is ⁇ 10 °C.
  • the induction melting furnace is used to melt the conventional multi-hour melting time into one hour to melt into a magnesium melt, which greatly shortens the output time of the starting magnesium alloy sheet after starting the electric furnace.
  • the induction electric furnace is an intermediate frequency furnace.
  • the traditional temperature-controlled resistance furnace single cavity improvement cost scheme of multiple temperature adjustment zones each temperature control zone is connected by overflow, and the magnesium melt temperature in the resistance furnace is controlled with high precision;
  • the casting temperature of 690 ⁇ 10°C is used to obtain the continuity of the magnesium alloy sheet.
  • the temperature of the rolling table and the temperature of the rolled magnesium sheet in the rolling zone are maintained at 250 ⁇ 350. °C, combined with the grain refinement of the magnesium alloy sheet, so the magnesium plywood during casting and rolling has good plasticity.
  • the magnesium alloy sheet outputted by the multi-stage roll 14 is passed through a winder 19 Winding in rolls.
  • the magnesium melt is active, a protective gas is disposed in the induction furnace 11 and the resistance furnace 12, and the shielding gas is distributed on the surface of the magnesium melt in the two furnaces to prevent the magnesium melt from coming into contact with oxygen.
  • the two furnaces are operated under sealed conditions, that is, a furnace cover is arranged at the furnace mouth, in particular, an induction electric furnace, after all the magnesium melts in the furnace are output into an empty furnace, the furnace cover is opened and the magnesium ingot is opened to avoid the inside thereof.
  • the magnesium melt is exposed to oxygen or moisture.
  • the shielding gas of the present invention is a mixed gas of SF 6 and CO 2 .
  • a high-to-low area partitioning plate 20 is disposed in the resistance furnace 12 to form a plurality of temperature regulating zones in the resistance furnace 12; the plurality of temperature regulating zones are penetrated through a space above the area dividing plate 20, the plurality of The number of temperature adjustment zones is 2, 3, 4 or 5 respectively.
  • the number of zone dividers 20 is one.
  • the temperature zone is 3, the zone dividers 20
  • the number is two.
  • the number of zone dividers is three, and so on. The following is the case when the temperature adjustment zone is 3:
  • the temperature adjustment zone includes a first temperature adjustment zone 21, a second temperature adjustment zone 22 and a third temperature regulation zone 23; the selected temperature range of the first temperature regulation zone 21 is 900 ⁇ 800 °C; and the second temperature regulation zone 22 The selected temperature range is 800 to 700 ° C; the set temperature of the third temperature adjustment zone 23 is 700 ° C.
  • the temperature gradient between each temperature control zone is set according to the number of temperature adjustment zones.
  • the magnesium melt in the induction furnace flows into the first temperature adjustment zone, and then overflows into the second temperature adjustment zone after the first temperature regulation zone is filled.
  • the second temperature regulation zone overflows into the third temperature regulation zone, and the classification is performed.
  • the temperature adjustment adjusts it from 900 °C to 900 °C, 800 °C and 700 °C, and finally reaches 690 ⁇ 10 °C to the casting rolls.
  • each temperature regulating zone including a heating resistor unit, a heat dissipating unit and a stirring mechanism, and the heating resistor unit is used for supplying thermal energy to the magnesium melt, and the heat dissipating unit is used for Absorbing the thermal energy of the magnesium melt, the agitation mechanism is used to make the temperature in the temperature regulation zone uniform, and the heating resistor unit and the heat dissipation unit correspond to each temperature adjustment zone to precisely adjust the temperature value of the magnesium melt therein; a detecting module for detecting temperature signals of each temperature regulating zone and a processing module for controlling temperature ranges of each temperature regulating zone; the processing module determines temperature compensation in each temperature regulating zone according to the detected temperature signal, and then sends a command to the heating resistor unit or The heat dissipation unit, when the detection temperature is too high compared to the set temperature, turn off the heating resistor unit, stop providing heat energy, and use the heat dissip
  • the heating resistor unit is a heating wire and a ceramic tube of the outer casing. The heating resistor unit is distributed in a part of the temperature regulating zone, and the distribution density thereof is determined according to the volume of each temperature regulating zone and the heat dissipation efficiency of the heat dissipation unit.
  • the stirring mechanism of at least one temperature regulating zone agitates the magnesium melt therein to uniformly distribute the metal elements; at least the liquid level of the other temperature regulating zone controls the smoothness and height, that is, the temperature adjustment zone is maintained as much as possible.
  • the liquid level is constant and the liquid level is not fluctuated.
  • the magnesium melt in the temperature adjustment zone is output to the biting zone of the casting roll through the conveying pipe, and the casting and rolling operation is directly performed.
  • the magnesium melt in the resistance furnace After the magnesium melt in the resistance furnace reaches a set temperature, it is conveyed to the biting zone of the casting roll through a conveying pipe, and the conveying pipe is preferably disposed near the bottom of the third temperature regulating zone 23.
  • a valve is provided on the delivery pipe for cutting or providing an outward magnesium melt.
  • the present invention provides a grain refiner inlet at the pipe 16 according to the quality requirement of the magnesium alloy plate, so as to input the grain refiner into the magnesium melt, thereby providing grain refinement.
  • the application of the invention uses AlTiC as a grain refiner for the magnesium alloy, which solves the plasticity problem of the magnesium alloy.
  • the rolling table surface temperature and the rolled magnesium plate temperature of each roll in the rolling zone are in the range of 250 to 350 ° C, and the temperature difference is ⁇ 10 along the axial direction of the roll.
  • °C which is realized by a temperature control module disposed adjacent to the rolling zone, and is used for adjusting the temperature of the rolling table working face and the rolled magnesium plate to be entered into the rolling zone to meet the set temperature requirement;
  • the temperature module includes heating, heat dissipation, and temperature inspection mechanisms for precisely regulating the temperature at each position.
  • the number of segments can be 2, 3, 4, 5, 6, 7, 8, and 9, depending on the specifications of the specific magnesium alloy plate.
  • the method includes at least two induction furnaces 11, each of which is connected to the resistance furnace 12 via a pipe 16 and a valve; in the continuous casting and rolling operation, each induction furnace 11 is alternately connected to the resistance furnace 12, at this time,
  • the magnesium melt in the inductive electric furnace 11 communicates into the electric resistance furnace through the pipeline until the magnesium melt in the induction electric furnace 11 completely flows out, and then closes the valve communicating with the induction electric furnace, and after the furnace body is cooled, the furnace cover is opened again. Inject metal elements.
  • the valve of the corresponding pipe of the induction furnace is opened, and the magnesium melt therein is used.
  • the continuous uninterrupted supply of the magnesium melt is achieved by the uninterrupted supply of the magnesium melt by a plurality of induction furnaces. In addition to the use of two induction furnaces, the same three induction furnaces and four induction furnaces can be used.
  • the invention firstly melts the magnesium ingot by using an induction electric furnace, and the melting efficiency thereof is greatly improved compared with the existing electric resistance furnace, thereby solving the bottleneck problem of the slow formation efficiency of the existing magnesium melt; secondly, using the magnesium melt
  • the temperature gradient is controlled to ensure that the temperature of the magnesium melt entering the casting and nip biting zone is 690 ⁇ 10 ° C. At this temperature, the plasticity and continuity of the formed magnesium alloy sheet are good, and at the same time, each temperature
  • the magnesium melt between the gradients is connected by overflow, which avoids the possibility of clogging using the pipeline, thereby improving the reliability of the method.
  • multi-stage rolling, continuous and high-efficiency molding of magnesium alloy sheets of the required specifications are examples of the required specifications.
  • the induction furnace, the pipeline, the resistance furnace, and the conveying pipe integrated with the resistance furnace are all alloyed, smelted, refined, slag-removed, temperature-controlled, and conveyed under the condition of a sealed and protective gas.
  • a light-transmitting hole and an observation window are provided at the top of the induction furnace and the resistance furnace, the furnace wall, and the like, and a flow meter is installed to control the flow rate of the shielding gas introduced into the furnace, and the pressure gauge detects the inside of the furnace.
  • the gas pressure and thyristor temperature control table monitor the temperature inside the furnace.
  • the grain refiner is added according to the weight of the magnesium melt and the specification of the magnesium alloy plate.
  • the added grain refiner accounts for 8-10% of the magnesium melt. After adding the grain refiner, the grain structure of the produced magnesium alloy plate can be further refined, and the plasticity of the magnesium alloy plate is greatly improved.
  • a protective gas ie a mixture of SFe and C0 2 , is introduced into the induction furnace and the electric resistance furnace.
  • the protective layer can be 8-15 cm thick, and the magnesium element in the isolated molten state is in direct contact with the residual oxygen in the furnace, thereby greatly improving the safety of production.
  • the surface of the casting roll and the 6-stage warm rolling roll is provided with a lubricant for preventing oxidative combustion of the magnesium alloy.
  • the lubricant on the surface of the double roll is composed of magnesium hydroxide 2-3 %, sodium decyl sulfonate. A suspension consisting of 0.3%, potassium fluoroborate 1% and distilled water.
  • Step 1 Add metal elements to the induction furnace:
  • the magnesium ingot into the induction furnace, and then put the alloying elements such as aluminum, zinc, manganese, lanthanum, cerium, zirconium and cadmium into the induction furnace according to the weight of the magnesium ingot and the specifications of the magnesium alloy plate;
  • the cover is used to seal the inner cavity of the induction furnace; the protective gas is charged into the induction furnace, and the timing of charging the protective gas may be before the induction furnace is heated, or when the metal temperature in the induction furnace is below 620 °C.
  • the valve for shielding gas is turned on, the mixed gas of SFe and C0 2 is charged into the induction furnace to prevent the magnesium element in the molten state from being in contact with the oxygen in the air after the melting, thereby improving the safety of production.
  • the refining and slag removal can be performed by the refining and slag removal schemes existing in the art, and the description of the application of the present invention The book is not described in detail.
  • the magnesium melt is agitated so that the magnesium alloy of the induction furnace has a uniform distribution of alloying elements.
  • the peripheral temperature control module connected to the induction furnace is started, and the temperature of the inner wall of the pipeline is raised to a set height to avoid the problem that the magnesium melt encounters condensation and blockage of the cold pipeline. .
  • the valve is opened to allow the magnesium melt in the induction furnace to flow into the resistance furnace through the pipe.
  • the present invention preferably uses a grain refiner to produce a magnesium alloy sheet, so when the valve is opened, the inlet of the grain refiner is also opened and the grain refiner is fed.
  • Step 2 Precisely control the temperature in the resistance furnace:
  • the magnesium melt flows into the resistance furnace, it is stored in the first temperature regulation zone of the resistance furnace until the liquid level reaches the height of the zone partition plate, and then overflows to the second temperature regulation zone, and similarly, overflows to The third temperature adjustment zone.
  • the heating resistor unit is used for supplying thermal energy to the magnesium melt
  • the heat dissipating unit is for absorbing thermal energy of the magnesium melt
  • the stirring mechanism is used for
  • the temperature in each temperature regulating zone is made uniform to precisely adjust the temperature value of the magnesium melt therein;
  • the method sets a detection module for detecting the temperature signals of each temperature regulating zone, and a processing module for controlling the temperature range of each temperature regulating zone;
  • the processing module determines the temperature compensation in each temperature adjustment zone according to the detected temperature signal, and then sends a command to the heating resistor unit or the heat dissipation unit.
  • the heating resistor unit When the detected temperature is too high compared to the set temperature, the heating resistor unit is turned off to stop providing the thermal energy. Cooling treatment is performed by using the heat dissipation effect of the heat dissipation unit until the detection temperature reaches the set value; when the detection temperature is lower than the set temperature, the power is supplied to the heating resistor unit to supply heat to the temperature adjustment zone, thereby increasing the temperature of the magnesium melt.
  • the temperature gradient of the present application can be achieved until the detected temperature reaches a set value.
  • the temperature control module on the periphery of the conveying pipe is started, so that the pipe and the valve thereon reach the set temperature value, and then the valve is opened.
  • the magnesium melt that meets the requirements flows out through the conveying pipe.
  • the liquid level in the third temperature adjustment zone should be kept as high as possible without fluctuation, so as not to affect the subsequent casting and rolling effect.
  • the inner cavity of the electric resistance furnace is sealed; after the protective gas is charged into the electric resistance furnace and the valve for protecting the gas is opened, the mixed gas of SF6 and C02 is charged into the electric resistance furnace to avoid the magnesium element in the molten state.
  • the contact of oxygen in the air improves the safety of production.
  • Step 3 Casting and rolling magnesium alloy sheets:
  • the present invention sprays a lubricant on the surface of the casting roll, which is composed of magnesium hydroxide 2- a suspension of 3 %, sodium decyl sulfonate 0.3%, potassium fluoroborate 1% and distilled water, the lubricant is evenly distributed on the surface of the upper and lower rolls, and the gap between the upper and lower rolls of the casting roll is magnesium In the cooling section of the melt, the vertical distance between the upper and lower rolls determines the thickness of the rolled magnesium alloy sheet.
  • the upper and lower rolls are respectively rotated in opposite directions, so that the rolls are in the opposite direction.
  • the coolant flows in or out continuously to reduce the temperature of the surface of the roll, and the magnesium melt is quickly converted into a solid magnesium alloy plate, and the solidified magnesium alloy plate is taken when the upper and lower rolls are simultaneously rotated in opposite directions. Go out to the next step.
  • Step 4 Multi-stage roll rolling magnesium alloy sheet
  • the surface temperature of the upper and lower rolls of the 6-stage warm roll is required to be accurately controlled between 250 and 350 °C, and the temperature difference is ⁇ 10 °C. If the surface temperature of the double rolls is outside the range of 250 to 350 °C or the temperature distribution is uneven, the rolled magnesium alloy sheets are directly deformed.
  • the gap between the upper and lower rolls of the 6-stage warm roll is the rolling section of the magnesium alloy plate, and the vertical distance between the upper and lower rolls determines the thickness of the magnesium alloy plate rolled by each section of the warm roll, when the magnesium alloy plate enters the
  • the upper and lower rolls of the first section are simultaneously rotated in opposite directions to bring out the magnesium alloy sheets having a thickness of 7-8 mm.
  • the magnesium alloy sheet has been rolled to a thickness of 7-8 mm and enters the second section of the upper and lower rolls, the second and lower rolls of the second stage are simultaneously rotated in opposite directions to have a rolled thickness of 3-4. 0-0.
  • the first and second rolls of the second and second rolls are rotated in the opposite direction.
  • a magnesium alloy plate of 2 mm has been completed.
  • Magnesium alloy plate compression ratio of each section of 6-stage warm roll (unit: mm):

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Description

镁合金板的连续髙效铸轧成型方法
【技术领域】
本发明涉及镁合金板的冶炼、 变形、 加工成型技术领域， 特别是一种 镁合金板的连续高效铸轧成型方法。
【背景技术】
镁液或者镁合金液性质活泼， 容易氧化燃烧， 几乎同所有铝合金材质 的耐火材料发生剧烈化学反应， 甚至发生剧烈的爆炸， 所以为了安全可靠 的生产， 用于生产的保护设施是必不可少的。 镁液或者镁合金液体简称为 镁熔体。
现有的镁合金板制造工艺， 其包括熔炼、控温、铸轧工序， 在整个工序 进行中， 须充分做好保护措施。 现有的熔炼采用电阻炉， 控温亦采用电阻 炉， 用双电阻炉实现铸轧前镁熔体的预处理， 然后即铸轧。 现有的铸轧其 断裂发生率高， 完全不能够实现连续铸轧， 且限于电阻炉的升温慢， 所以 生产效率低下。
当前， 面临着全球资源的紧缺， 处于该紧张形势下， 对于镁资源的大 国， 我国迫切需提高镁合金的开发生产效率、 降低其生产成本、 并提高生 产质量。
【发明内容】
为了解决现有的技术问题， 本发明提供一种镁合金板的连续高效铸轧 成型方法， 其制得的镁合金板断裂发生率低、 品质提高且生产率亦提高。
本发明解决现有的技术问题， 提供一种镁合金板的连续高效铸轧成型 方法， 该方法包括： 顺序设置的感应电炉、 电阻炉、 铸轧辊和多段轧辊； 向所述感应电炉内投入金属元素， 该金属元素为镁锭， 或者镁锭与合金元 素， 金属元素在所述感应电炉内熔化成镁熔体； 经所述感应电炉熔化后的 镁熔体经管道流入所述电阻炉内， 并在所述电阻炉内进行调温； 所述电阻 炉内设置至少两个溢流相通的调温区， 所述调温区之间的温差恒定； 经过 所述电阻炉后的镁熔体通过输送管到达所述铸轧辊的咬入区， 成型为镁合 金板送出； 镁熔体进入咬入区的温度为 690±10°C ; 镁合金板顺序经过所述 多段轧辊， 在轧制区该每段轧辊的轧表工作面温度和被轧镁合板温度范围 为 250〜350 °C， 且沿着所述轧辊的轴向上该温度差为 ±10°C。
本发明更进一步的改进是：
经多段轧辊输出后的镁合金板经卷绕机成卷卷绕。
所述金属元素在所述感应电炉内熔化， 然后经过精炼和除渣处理， 之 后搅拌均匀。
所述感应电炉与所述电阻炉内设置保护气体。
该保护气体为 SFe和 C02的混合气体。
所述调温区之间设置区域分隔板， 该区域分隔板与电阻炉体将所述电 阻炉的内腔形成多个所述调温区； 当所述区域分隔板至少为两个时， 沿着 镁熔体的流向所述区域分隔板由高至低设置， 所述调温区经区域分隔板之 上的空间贯通。
所述调温区包括加热电阻单元、 散热单元和搅拌机构； 本方法设置用 于检测各个调温区温度信号的检测模块、 控制各个调温区温度范围的处理 模块；所述处理模块根据检测的温度信号，判断各个调温区内的温度补偿， 然后发送命令至加热电阻单元或散热单元； 至少一调温区的所述搅拌机构 搅拌其内的镁熔体， 使金属元素分布均匀； 至少一调温区的液面控制其平 稳与高度， 该调温区的镁熔体经输送管输出。
所述调温区的壁为铁质； 所述加热电阻单元为加热丝及其外套的陶瓷 管， 该加热电阻单元分布于调温区的局部。
所述调温区为 2、 3、 4或 5个。
所述调温区包括第一调温区、 第二调温区和第三调温区； 所述第一调 温区的选值温度范围为 900〜800 °C ; 所述第二调温区的选值温度范围为 800〜700°C ; 所述第三调温区的设定温度为 700°C。
所述输送管设置于靠近所述第三调温区的底部。
分别在所述管道和所述输送管内设置阀门； 并在所述管道和所述输送 管的外围设置控温模块， 用于使所述管道的内壁、 所述输送管的内壁和所 述阀门具备设定的温度。
在所述管道处设置晶粒细化剂入口。
邻近轧制区设置控温模块， 用于对欲进入该轧制区的轧表工作面和被 轧镁合板温度调节， 使其达到设定的温度要求。
本方法包括至少两感应电炉， 所述两感应电炉均与所述电阻炉相连， 经所述阀门所述感应电炉交替择一与所述电阻炉相相通。
相较于现有技术， 本发明的有益效果是： 首先， 采用感应电炉熔化镁 锭， 相较已有的电阻炉熔化， 其熔化效率大幅度提高， 从而解决了现有的 镁熔体形成效率慢的瓶颈问题； 其次， 采用镁熔体的温度梯度控制， 以保 证进入铸轧咬入区的镁熔体温度为 690±10°C， 在该温度下， 成型镁合金板 的塑性和连续性良好， 同时， 各温度梯度之间的镁熔体经溢流相连， 避免 了使用管道发生堵塞的可能性， 从而提高了本方法的可靠性； 最后， 多段 轧辊轧制， 连续、 高效成型所需规格的镁合金板。
【附图说明】
图 1为本发明镁合金板的连续高效铸轧成型方法的结构示意图； 图 2为本发明成型方法的流程示意图。
【具体实施方式】
下面结合附图说明及具体实施方式对本发明进一步说明。
如图 1和图 2所示，一种镁合金板的连续高效铸轧成型方法，其包括: 感应电炉 11、 电阻炉 12、 铸轧辊 13和多段轧辊 14; 感应电炉 11用于熔 化投入其内的镁锭 15;经感应电炉 11熔化后的镁熔体经管道 16流入电阻 炉 12内； 电阻炉 12内设置至少两溢流相通的调温区， 调温区之间的温差 恒定， 调温区呈降温排列； 经过电阻炉 12后的镁熔体通过输送管 17到达 铸轧辊 13的咬入区 18， 成型为镁合金板送出； 镁熔体进入咬入区 18的温 度为 690±10°C ; 镁合金板顺序经过多段轧辊 14， 在轧制区该每段轧辊的 轧表工作面温度和被轧镁合板温度范围为 250〜350°C，且沿着所述轧辊的 轴向上其温差为 ±10°C。 在本方案中， 采用感应电炉熔化， 将传统的多个 小时熔化时间缩减为一小时之内即可熔化成镁熔体， 大大缩短开机后起始 镁合金板输出时间， 该感应电炉为中频炉； 同时， 将传统的控温电阻炉单 腔改进成本方案的多个调温区， 各调温区之间经溢流相连， 高精度控制了 电阻炉内的镁熔体温度； 另外， 本方案采用 690±10°C的铸轧成型温度， 制 得的镁合金板连续性好； 最后， 保持在轧制区该每段轧辊的轧表工作面温 度和被轧镁合板温度范围为 250〜350°C， 结合镁合金板晶粒细化， 所以此 状态下铸轧时的镁合板其塑性好。
为了便于包装和运输， 经多段轧辊 14输出后的镁合金板经卷绕机 19 成卷卷绕。
由于镁熔体性质活泼，所以感应电炉 11与电阻炉 12内设置保护气体， 该保护气体分布于两炉内的镁熔体液面之上， 避免镁熔体与氧气接触。 该 两炉是在密封条件下运行， 即在炉口处设置炉盖， 特别是感应电炉， 须其 内的镁熔体全部输出成为空炉以后， 打开炉盖投入镁锭， 以避免其内的镁 熔体接触氧气或水份， 为了便于观察感应电炉内的镁熔体状态， 优选在炉 盖上设置观察孔。 本发明的保护气体为 SF6和 C02的混合气体。
电阻炉 12内设置由高至低的区域分隔板 20，从而在电阻炉 12内形成 多个调温区；该多个调温区经区域分隔板 20之上的空间贯通，该多个调温 区的数量分别为 2、 3、 4或 5个， 当调温区为 2个时， 区域分隔板 20的数 量为一， 当调温区为 3个时， 区域分隔板 20 的数量为二， 当调温区为 4 个时， 区域分隔板的数量为三， 其它的依此类推。 以下以调温区为 3个时 举例说明：
调温区包括第一调温区 21、 第二调温区 22和第三调温区 23 ; 第一调 温区 21的选值温度范围为 900〜800°C ;第二调温区 22的选值温度范围为 800〜700°C ; 第三调温区 23的设定温度为 700°C。根据调温区的数量设定 各调温区之间的温度梯度。 感应电炉内的镁熔体流入第一调温区， 当第一 调温区装满以后再溢流入第二调温区， 同理， 从第二调温区溢流入第三调 温区，分级的温度调节将其从熔化时的 900 °C左右顺序调节到 900°C、800°C 和 700°C， 并最终达到至铸轧辊时为 690±10 °C。
为了实现各个调温区内的镁熔体温度趋于恒定， 本发明采用各调温区 包括加热电阻单元、 散热单元和搅拌机构， 加热电阻单元用于向镁熔体提 供热能， 散热单元用于吸收镁熔体的热能， 搅拌机构用于使调温区内的温 度均匀， 加热电阻单元、 散热单元对应于每一调温区， 以精确调整其内镁 熔体的温度值； 本方法还设置用于检测各个调温区温度信号的检测模块、 控制各个调温区温度范围的处理模块； 处理模块根据检测的温度信号， 判 断各个调温区内的温度补偿， 然后发送命令至加热电阻单元或散热单元， 当检测温度相较设定温度过高时， 关闭加热电阻单元， 停止提供热能， 利 用散热单元的散热效果进行降温处理， 直至检测温度达到设定值； 当检测 温度相较设定温度过低时， 供电于加热电阻单元， 向调温区提供热能， 从 而提高镁熔体的温度， 直至检测温度达到设定值。 由于该电阻炉的内壁为 铁质， 金属铁导热快， 其外壁具有一定的散热效果， 所以优选散热单元采 用风冷。 而加热电阻单元为加热丝及其外套的陶瓷管， 该加热电阻单元分 布于调温区的局部， 其分布密度根据各个调温区的容积及散热单元的散热 效率而定。 在本方案中， 至少一调温区的搅拌机构搅拌其内的镁熔体， 使 金属元素分布均匀； 至少另一调温区的液面控制其平稳与高度， 即尽量保 持该调温区内的液面高度不变、 液面无波动， 该调温区的镁熔体经输送管 输出至铸轧辊的咬入区， 直接进行铸轧操作。
电阻炉内的镁熔体达到设定温度后经输送管输送至铸轧辊的咬入区， 该输送管优选设在靠近第三调温区 23 的底部。 并在该输送管上串设一阀 门， 该阀门用于切断或提供向外的镁熔体。
由于镁合金的塑性差， 本发明根据镁合金板的质量需求， 在管道 16 处设置晶粒细化剂入口， 以便于向镁熔体内输入晶粒细化剂， 从而提供晶 粒细化的镁合金板。 本发明申请采用 AlTiC作为镁合金的晶粒细化剂， 解 决了镁合金的塑性问题。
本发明的多段轧辊 14，在轧制区该每段轧辊的轧表工作面温度和被轧 镁合板温度范围为 250〜350°C，且沿着所述轧辊的轴向上其温差为 ±10°C， 其通过邻近轧制区设置的控温模块来实现， 用于对欲进入该轧制区的轧表 工作面和被轧镁合板温度调节， 使其达到设定的温度要求； 该控温模块包 括加热、 散热、 温检机构， 以用于精确调控各个位置的温度， 段数能够为 2、 3、 4、 5、 6、 7、 8、 9， 根据具体镁合金板规格而定。
本方法包括至少两感应电炉 11， 各个感应电炉 11分别经管道 16、 阀 门与电阻炉 12相连； 在连续铸轧的工作状态下， 各个感应电炉 11交替择 一与电阻炉 12相通， 此时， 相通的感应电炉 11内的镁熔体经管道流入电 阻炉，直至该感应电炉 11内的镁熔体完全流出，然后关闭与该感应电炉相 通的阀门， 待炉体冷却后打开炉盖再一次的投入金属元素。 当一感应电炉 内的镁熔体使用完毕关闭阀门时， 打开另一感应电炉所对应管道的阀门， 使用其内的镁熔体。 由于采用多个感应电炉不间断供应镁熔体， 从而实现 了镁熔体的连续不间断供应。 除了使用两感应电炉， 同理能够使用三感应 电炉、 四感应电炉。
本发明首先， 采用感应电炉熔化镁锭， 相较已有的电阻炉熔化， 其熔 化效率大幅度提高， 从而解决了现有的镁熔体形成效率慢的瓶颈问题； 其 次， 采用镁熔体的温度梯度控制， 以保证进入铸轧咬入区的镁熔体温度为 690±10°C， 在该温度下， 成型镁合金板的塑性和连续性良好， 同时， 各温 度梯度之间的镁熔体经溢流相连， 避免了使用管道发生堵塞的可能性， 从 而提高了本方法的可靠性； 最后， 多段轧辊轧制， 连续、 高效成型所需规 格的镁合金板。
本发明一具体实施方式如下：
在结构上， 感应电炉、 管道、 电阻炉、 与电阻炉一体的输送管， 四者 是在密闭的并具有保护气体的条件下进行配合金、 熔炼、 精炼、 除渣、 控 温和输送。 为了便于工作人员进行管控， 在感应电炉及电阻炉的炉顶、 炉 壁等处设有透光孔和观察窗， 并安装流量计控制通入炉内的保护气体的流 量、 压力计检测炉内的气体压力和可控硅温控表监控炉内温度。
在工艺方法上， 根据镁熔体重量及镁合金板规格加入晶粒细化剂
(ALTiC ) , 例如： 加入的晶粒细化剂占镁熔体的比重为 8-10 %。， 加入晶 粒细化剂以后， 能使生产的镁合金板晶粒组织更为细化， 大大提升镁合金 板的塑性。
在工艺方法上， 在金属元素（镁锭， 或镁锭及合金元素）熔化、 精炼、 除渣及控温过程中， 在感应电炉及电阻炉内通入保护气体， 即 SFe和 C02 的混合气体， 用以在感应电炉内部上空形成一气体保护层。 该保护层可以 为 8-15 cm厚， 以隔离熔融状态的镁元素与炉内残留的氧气直接接触，从而 大大提高生产的安全性。
在工艺方法上， 铸轧辊及 6段温轧的轧辊表面发设置有润滑剂， 用于 防止镁合金氧化燃烧， 在双轧辊表面的润滑剂由氢氧化镁 2-3 %、 垸基磺 酸钠 0. 3 %、 氟硼酸钾 1 %和蒸馏水组成的悬浮液。
本发明镁合金板的生产工艺其按步骤描述如下：
步骤 1 : 感应电炉内加入金属元素：
将镁锭投入感应电炉内， 再根据镁锭的重量及生产镁合金板的规格按 比例将铝、 锌、 锰、 铈、 钍、 锆、 镉等合金元素投入感应电炉内； 关闭感 应电炉的炉盖，使感应电炉内腔为密闭状态；将保护气体充入感应电炉内， 其充入保护气体的时机可以是感应电炉加热前， 也可以是感应电炉内的金 属温度位于 620°C以下时， 开启保护气体的阀门以后， SFe和 C02的混合气 体即充入感应电炉内， 以避免熔化后处于熔融状态的镁元素与空气中的氧 气接触， 提高生产的安全性。
待感应电炉内的金属元素熔化以后， 再经过精炼、 除渣处理， 该精炼 和除渣能够弓 I用本技术领域已有的精炼和除渣方案， 在本发明申请的说明 书不详细描述。
最后对镁熔体进行搅拌处理， 以使感应电炉的镁熔体其合金元素分布 均匀。
欲使用一感应电炉内的镁熔体时， 启动与该感应电炉相连的管道外围 控温模块， 将管道内壁的温度提升至设定高度， 以避免镁熔体遇到冷管道 发生冷凝堵塞的问题。 当管道的温度达到设定数值时， 打开阀门， 使感应 电炉内的镁熔体经过管道流入电阻炉内。
本发明申请优选采用晶粒细化剂生产镁合金板， 所以当打开阀门时， 亦打开晶粒细化剂的入口， 送入晶粒细化剂。
步骤 2 : 电阻炉内精确控制温度：
待镁熔体流入电阻炉内后， 其在电阻炉的第一调温区进行储存， 直至 液面达到区域分隔板的高度， 然后溢流到第二调温区， 同理， 溢流到第三 调温区。 在第一、 第二调温区， 均对应有加热电阻单元、 散热单元和搅拌 机构， 加热电阻单元用于向镁熔体提供热能， 散热单元用于吸收镁熔体的 热能， 搅拌机构用于使每个调温区内的温度均匀， 以精确调整其内镁熔体 的温度值； 本方法设置用于检测各个调温区温度信号的检测模块、 控制各 个调温区温度范围的处理模块； 处理模块根据检测的温度信号， 判断各个 调温区内的温度补偿， 然后发送命令至加热电阻单元或散热单元， 当检测 温度相较设定温度过高时， 关闭加热电阻单元， 停止提供热能， 利用散热 单元的散热效果进行降温处理， 直至检测温度达到设定值； 当检测温度相 较设定温度过低时， 供电于加热电阻单元， 向调温区提供热能， 从而提高 镁熔体的温度， 直至检测温度达到设定值， 这样即可实现本发明申请的温 度梯度。
当位于输送管前面的调温区，其温度和容量达到启动铸轧工艺要求时， 启动输送管外围的控温模块， 使输送管及其上的阀门达到设定的温度值， 然后打开阀门， 符合要求的镁熔体即经输送管流出。 且在第三调温区内的 液面尽量保持高度不变、 无波动， 以免影响后续铸轧效果。
在本步骤， 电阻炉内腔为密闭状态； 将保护气体充入电阻炉内， 开启 保护气体的阀门以后， SF6和 C02的混合气体即充入电阻炉内， 以避免处于 熔融状态的镁元素与空气中的氧气接触， 提高生产的安全性。
步骤 3 : 铸轧镁合金板：
与电阻炉一体化的输送管，其输送调温区的镁熔体至铸轧机的咬入区。 为了防止铸轧辊的上下两辊表与镁熔体发生反应或出现粘稠现象， 同时还 防止镁熔体氧化燃烧， 本发明在铸轧辊的表面喷润滑剂， 该润滑剂由氢氧 化镁 2-3 %、 垸基磺酸钠 0. 3 %、 氟硼酸钾 1 %和蒸馏水组成的悬浮液， 这 种润滑剂均匀分布在上下两轧辊的表面， 铸轧辊的上下两轧辊之间的间隙 为镁熔体的冷却段， 上下两轧辊之间间隙的垂直距离确定了轧制出镁合金 板的厚度， 当镁熔体进入轧辊冷却段时， 上下两轧辊分别向相反的方向转 动， 这样轧辊里的冷却液不间断循环流进或流出以降低轧辊表面的温度， 迅速将镁熔体转变为固态的镁合金板， 在上下两轧辊向相反的方向同时转 动时把已凝固的固态的镁合金板带出进入下工序。
步骤 4: 多段轧辊轧制镁合金板
由铸轧辊轧制后的镁合金板进入 6段温轧辊时， 要求 6段温轧辊的上 下两轧辊表面温度要精确控制在 250〜350 °C之间， 且温度差为 ±10°C。 如 果双轧辊的表面温度在 250〜350 °C范围之外或者温度分布不均匀都会直 接引起轧制的镁合金板变形。 6 段温轧辊上下两轧辊之间的间隙为镁合金 板的轧制段， 上下两轧辊之间间隙的垂直距离确定了各段温轧辊轧制出来 镁合金板的厚度， 当镁合金板进入第一段上下两轧辊轧制段时， 第一段上 下两轧辊分别向相反的方向同时转动将已经轧制厚度在 7-8 mm之间镁合金 板带出。此已轧制成厚度在 7-8 mm之间镁合金板进入第二段上下两轧辊轧 制段时， 第二段上下两轧辊分别向相反的方向同时转动将已经轧制厚度在 3-4 匪之间镁合金板带出， 依次进入第三， 四， 五， 六段温轧辊， 在第六 段上下两轧辊分别向相反的方向同时转动将已经轧制成厚度在 0. 1-0. 2 mm 之间镁合金板已完成。
6段温轧辊各段镁合金板压缩比 （单位： mm) :
Figure imgf000010_0001
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说 明， 不能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术 领域的普通技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若 干简单推演或替换， 都应当视为属于本发明的保护范围。

Claims

权利要求书
1 . 一种镁合金板的连续高效铸轧成型方法， 其特征在于： 该方法提供 顺序设置的感应电炉、 电阻炉、 铸轧辊和多段轧辊；
向所述感应电炉内投入金属元素， 该金属元素为镁锭， 或者镁 锭与合金元素， 金属元素在所述感应电炉内熔化成镁熔体；
经所述感应电炉熔化后的镁熔体经管道流入所述电阻炉内， 并 在所述电阻炉内进行调温； 所述电阻炉内设置至少两个溢流相通的 调温区， 所述调温区之间的温差恒定；
经过所述电阻炉后的镁熔体通过输送管到达所述铸轧辊的咬入 区， 成型为镁合金板送出； 镁熔体进入咬入区的温度为 690±10 °C ;
镁合金板顺序经过所述多段轧辊， 在轧制区该每段轧辊的轧表 工作面温度和被轧镁合板温度范围为 250〜350°C， 且沿着所述轧辊 的轴向上该温度差为 ±10°C。
2. 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 经多段轧辊输出后的镁合金板经卷绕机成卷卷绕。
3. 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述金属元素在所述感应电炉内熔化， 然后经过精炼和除渣 处理， 之后搅拌均匀。
4. 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述感应电炉与所述电阻炉内设置保护气体。
5. 根据权利要求 4所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 该保护气体为 SFe和 C02的混合气体。
6. 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述调温区之间设置区域分隔板， 该区域分隔板与电阻炉体 将所述电阻炉的内腔形成多个所述调温区； 当所述区域分隔板至少 为两个时， 沿着镁熔体的流向所述区域分隔板由高至低设置， 所述 调温区经区域分隔板之上的空间贯通。
7. 根据权利要求 6所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述调温区包括加热电阻单元、 散热单元和搅拌机构； 设置 用于检测各个调温区温度信号的检测模块、 控制各个调温区温度范 围的处理模块； 所述处理模块根据检测的温度信号， 判断各个调温 区内的温度补偿， 然后发送命令至加热电阻单元或散热单元； 至少 一调温区的所述搅拌机构搅拌其内的镁熔体， 使金属元素分布均匀； 至少一调温区的液面控制其平稳与高度， 该调温区的镁熔体经输送 管输出。
8. 根据权利要求 7所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述调温区的壁为铁质； 所述加热电阻单元为加热丝及其外 套的陶瓷管， 该加热电阻单元分布于调温区的局部。
9. 根据权利要求 6所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述调温区为 2、 3、 4或 5个。
10. 根据权利要求 6所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述调温区包括第一调温区、 第二调温区和第三调温区； 所 述第一调温区的选值温度范围为 900〜800°C ; 所述第二调温区的选 值温度范围为 800〜700°C ; 所述第三调温区的设定温度为 700°C。
11. 根据权利要求 10所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 所述输送管设置于靠近所述第三调温区的底部。
12. 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 分别在所述管道和所述输送管内设置阀门； 并在所述管道和 所述输送管的外围设置控温模块， 用于使所述管道的内壁、 所述输 送管的内壁和所述阀门达到设定的温度要求。
13. 根据权利要求 12所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 在所述管道处设置晶粒细化剂入口。
14. 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 邻近轧制区设置控温模块， 用于对欲进入该轧制区的轧表工 作面和被轧镁合板温度调节， 使其达到设定的温度要求。 根据权利要求 1 所述的镁合金板的连续高效铸轧成型方法， 其特征 在于： 本方法包括至少两感应电炉， 所述两感应电炉均与所述电阻 炉相连， 经所述阀门所述感应电炉交替择一与所述电阻炉相相通。
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