CN104942425B - A kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency welded tube technique - Google Patents
A kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency welded tube technique Download PDFInfo
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- CN104942425B CN104942425B CN201410720551.5A CN201410720551A CN104942425B CN 104942425 B CN104942425 B CN 104942425B CN 201410720551 A CN201410720551 A CN 201410720551A CN 104942425 B CN104942425 B CN 104942425B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 124
- 239000010959 steel Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910052750 molybdenum Inorganic materials 0.000 title claims abstract description 28
- 239000011733 molybdenum Substances 0.000 title claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 86
- 230000001681 protective effect Effects 0.000 claims abstract description 22
- 230000006698 induction Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 17
- 239000002826 coolant Substances 0.000 claims description 10
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/06—Welding by high-frequency current heating characterised by the shielding of the welding zone against influence of the surrounding atmosphere
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides a kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency welded tube techniques, comprise the following steps：A., chrome-molybdenum steel band or high-strength steel strip are cut into the steel band of a fixed-bandwidth;B. the steel band of fixed-bandwidth is squeezed into steel pipe by multigroup mold;C. steel pipe is expected into weld holder by Volume, installs induction of high frequency welding machine, protective gas gas blow pipe is installed in steel pipe, welded wheel, which squeezes, makes the pipe seam alignment of steel pipe compress and generate certain amount of compression;D. open and protective gas air blowing protection is carried out at protective gas gas blow pipe butt welding point, open induction of high frequency welding machine and welded;E. the steel pipe after welding is cooled down through air-cooled slot;F. water cooled slot cools down the steel pipe through the cooling of air-cooled slot again.The ratio-frequency welded tube technique can realize normal weld chrome molybdenum steel pipe or high intensity mouldability automobile using steel pipe on common high-frequency welding tube mill, and high precision machining, stable quality, processing are simple, at low cost, can process the steel pipe of various specifications.
Description
Technical field
The present invention relates to welding technology field more particularly to a kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency weldings
Plumber's skill.
Background technology
Chrome-molybdenum steel is chromium（Cr）, molybdenum（Mo）And iron（Fe）, carbon（C）Alloy, due to the particularity of chrome molybdenum steel chemical composition,
Material is not easy to weld, and high-frequency welding is difficult, and normal weld is difficult to realize on common high-frequency welding tube mill.Tension stress is in 400-
The high intensity mouldability vapour Trucks of 980Mpa is also difficult to realize normal weld with steel on common high-frequency welding tube mill.It is more currently on the market
Number demands are and the mostly seamless steel pipes from international market import, somewhat expensive, and wall thickness accuracy is extremely difficult to the demand of finishing.
Since seamless steel pipe is there are wall unevenness Uniform compared with welded tube, diameter, which is less than 40mm pipe with small pipe diameter, need to increase heat treatment, repeatedly pipe
Etc. processes, cost increase, processed complex.
Now it is badly in need of a kind of welded tube processing technology to solve above-mentioned problem.
The content of the invention
For the above-mentioned prior art, the technical problems to be solved by the invention be to provide it is a kind of can be in common high-frequency welding tube mill
Upper realization normal weld chrome molybdenum steel pipe or the chrome-molybdenum steel of high intensity mouldability automobile using steel pipe or high intensity mouldability automobile steel
Ratio-frequency welded tube technique, the ratio-frequency welded tube technique high precision machining, stable quality, processing are simple, at low cost, can process various specifications
Steel pipe.
In order to solve the above technical problem, the present invention provides a kind of chrome-molybdenum steel or high intensity mouldability automobile steel high frequencies
Welded tube technique, comprises the following steps：
A., chrome-molybdenum steel band or high-strength steel strip are cut into the steel band of a fixed-bandwidth;
B. the steel band of fixed-bandwidth is squeezed into steel pipe by multigroup mold;
C. steel pipe is expected into weld holder by Volume, installs induction of high frequency welding machine, protective gas air blowing is installed in steel pipe
Pipe, welded wheel, which squeezes, makes the pipe seam alignment of steel pipe compress and generate certain amount of compression;
D. open and carry out protective gas at protective gas gas blow pipe butt welding point and blow from inside to outside protection, unlatching induction of high frequency
Welding machine is welded;
E cools down the steel pipe after welding through air-cooled slot;
The steel pipe that F is cooled down through air-cooled slot water cooled slot cooling again.
Further improvement of the present invention is that the mixed gas that the protective gas forms for 90%Ar gas and 10%CO2 gas.
Further improvement of the present invention is that the protective gas air blowing flow control is in 15L-20L/min.
Further improvement of the present invention is that the inflatable mouth of the protective gas gas blow pipe is from welding central point 1.5mm extremely
2.5mm。
Further improvement of the present invention is that the coolant in the bar magnet of the induction of high frequency welding machine is recycled to steel by pipeline
Pipe is outer, and the material of pipeline uses non-magnetic heat-resisting material.
Further improvement of the present invention is that the welding wheel is made of ceramic material.
Further improvement of the present invention is that setting one group of roll before the welding wheel, the steel pipe reaches after roll
It welds at wheel.
Further improvement of the present invention is that setting one group of roll before the air-cooled slot, the steel pipe after the welding is through rolling
It is reached after roller at air-cooled slot.
Further improvement of the present invention is that the steel pipe after the welding is no less than 20 seconds from the time between air-cooled arrival water cooling.
Compared with prior art, it is an advantage of the current invention that the ratio-frequency welded tube technique is adopted when steel pipe carries out high-frequency welding
The mixed gas formed with 90%Ar gas and 10%CO2 gas is blown from inside to outside to be protected, while the bar magnet of induction of high frequency welding machine
Interior coolant is recycled to by pipeline outside steel pipe, and the material of pipeline uses non-magnetic heat-resisting material, the steel after welding
Pipe is after the cooling of air-cooled slot, then the cooling of water cooled slot.The ratio-frequency welded tube technique can realize normal weldering on common high-frequency welding tube mill
Connect chrome molybdenum steel pipe or high intensity mouldability automobile using steel pipe, the ratio-frequency welded tube technique high precision machining, stable quality, processing letter
It is single, at low cost, the steel pipe of various specifications can be processed.
Description of the drawings
Fig. 1 is the mixed gas protected structure diagram of the present invention;
Fig. 2 is the coolant reflux schematic diagram in the bar magnet of the present invention;
Fig. 3 is high strength steel and the amount of compression of ordinary steel and heat affected area contrast table;
Fig. 4 is the process flow chart of the present invention.
The names of the parts is as follows in figure：
1-electric circle;
2-protective gas gas blow pipe;
3-welding central point;
4-bar magnet;
5-pipeline.
Specific embodiment
The present invention is described in further detail below, but it is not as a limitation of the invention.
The present invention provides a kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency welded tube technique, and process flow chart is as schemed
Shown in 4, comprise the following steps：
A., chrome-molybdenum steel band or high-strength steel strip are cut into the steel band of a fixed-bandwidth;
B. the steel band of fixed-bandwidth is squeezed into steel pipe by multigroup mold;
C. steel pipe is expected into weld holder by Volume, installs induction of high frequency welding machine, protective gas air blowing is installed in steel pipe
Pipe, welded wheel, which squeezes, makes the pipe seam alignment of steel pipe compress and generate certain amount of compression;
D. open and carry out protective gas at protective gas gas blow pipe butt welding point and blow from inside to outside protection, unlatching induction of high frequency
Welding machine is welded;
E. the steel pipe after welding is cooled down through air-cooled slot;
F. water cooled slot cools down the steel pipe through the cooling of air-cooled slot again.
Specifically, the mixed gas that the protective gas forms for 90%Ar gas and 10%CO2 gas, the protective gas are blown
Flow control is in 15L-20L/min.The inflatable mouth of the protective gas gas blow pipe is from welding central point 1.5mm to 2.5mm.It is described
Coolant in the bar magnet of induction of high frequency welding machine is recycled to by pipeline outside steel pipe, and the material of pipeline uses non-magnetic resistance to height
Adiabator.The welding wheel is made of ceramic material.
Preferably, one group of roll is set before the welding wheel, and the steel pipe is reached after roll at welding wheel.Described
One group of roll is set before air-cooled slot, and the steel pipe after the welding is reached after roll at air-cooled slot.Steel pipe after the welding from
The time is no less than 20 seconds between air-cooled arrival water cooling.
Ratio-frequency welded tube technique described above is suitable for the chrome-molybdenum steel steel pipe of various shapes and high intensity mouldability automobile using
The high-frequency welding of steel, such as it is circular, oval, square.It is described in detail below by taking circular chrome-molybdenum steel steel pipe as an example.
The present invention is the improvement to the progress of ratio-frequency welded tube technique using common induction of high frequency welding machine.Such as Fig. 1 and Fig. 2 institutes
Show, electric circle 1 is sheathed on outside round steel pipe, and bar magnet 4 is arranged in round steel pipe and the formation high-frequency induction of electric circle 1, cold in bar magnet 4
But liquid is recycled to that round steel pipe is external, and protective gas gas blow pipe 2 is installed in round steel pipe by pipeline 5, and protective gas is blown
Between the inflatable mouth of pipe 2 is 1.5 to 2.5 millimeters with a distance from welding central point 3.
One, bandwidth requirements：Ratio-frequency welded tube be it is a kind of steel band is squeezed into toroidal by multigroup mold, then pass through ratio-frequency welding
The technology that machine welds weld seam in real time, welding current frequency is in 400KHz or so, and welding temperature can be controlled in 1100-1400
Between DEG C.So band data is extremely important to welding performance, exemplified by the common often pipe of See, calculation formula is：Pc =(ψ
DSQ-T)* π+T.Pc is bandwidth, and T is thick for material, and Δ is sizing surplus, and ψ D are pipe caliber, and π is pi, main pipe size: ψ
DSQ=ψD0+ΔD.And the bandwidth of 5-10% need to be increased by producing chrome-molybdenum steel or high Strong degree steel（According to the different increased amounts of material not
Together）, it is therefore an objective to increase amount of compression during welding, amount of compression is inadequate, can be in welding section after welding since the intensity of material is bigger
Bullet, which is split, again causes welding to fail.
Two, are different from production ordinary low-carbon steel, and shaping need to be increased and roll by producing chrome-molybdenum steel or high intensity mouldability automobile steel
The group number of roller increases to 10 groups or more by 8 groups of common board, and bandwidth is similar, and the strength of materials is stronger, is more difficult to increasing for principle
Shaping, need to increase molding die group number to overcome.
The amount of compression of three, welding wheels：One of technological difficulties of double-strength pipe welding are exactly the control and heat affecting of amount of compression
The width control in area（It is controlled especially by increase and decrease electric circle number and adjustment electric circle with welding the distance of wheel）, high strength steel and common
The amount of compression and heat affected area contrast table of steel are as shown in Figure 3.
Gas shield when four, are welded：90%Ar gas and the mixed gas of 10%CO2 gas composition is selected to be blown out of pipe to outside pipe
Gas is protected, and flow control is in 15-20L/min, it is therefore an objective to be driven the excessive gas and air that are generated when welding away, to ensure
The formedness of welding condition.Pay attention to air blowing angle control, inflatable mouth need to from welding central point 3 with a distance from for 1.5 to 2.5 millimeters it
Between (as shown in Figure 1).
For five, due to the particularity of chrome-molybdenum steel and high intensity mouldability automobile steel material, welding section environmental requirement is relatively tight
Lattice by way of ensureing that the environment of welding section, the present invention isolate coolant when welding, make to avoid high temperature when welding
Coolant and water resolve into other excessive gas and influence welding effect.The coolant of bar magnet 4 is specifically passed through into special pipe
It is external that road 5 is recycled to round steel pipe, and material then selects non-magnetic heat-resisting material, and the bar magnet 4 for needing and using is combined to
Together, so as to reach welding section without coolant and not influence the efficiency of high-frequency welding, it ensure that the environment of welding section.This mode
Shortcoming is reduction of the service life of welding wheel, and in order to extend the service life of welding wheel, welding wheel is made using ceramic material (as schemed
Shown in 2).
Six, respectively add one group of roll, to ensure that welding section has to ensure the firmness of welding before and after welding wheel and air-cooled slot
Lasting village, which tries hard to avoid, to exempt from weld seam and flicks again, and in order to ensure the stability of welding section, round steel pipe is by air-cooled between water cooling
Distance will have the enough air natural cooling time, which is not less than 20 seconds, so in the fixed Qing Condition of device length
Under to control suitable machine run speed realize this technology requirement.
Domestic technique is immature, and the market demand largely comes from international market.Domestic market is mostly used seamless steel pipe, with
Welded tube compares since member seam steel pipe is there are wall unevenness Uniform, and diameter, which is less than 40mm pipe with small pipe diameter, need to increase heat treatment, repeatedly pipe etc.
Process, cost increase, processed complex.The invention avoids above-mentioned puzzlements, can directly bear the stabilization of client's needs, high-precision
Degree, the chrome molybdenum steel pipe of various required specifications saves the energy, reduces cost, improve health product performance, meets social need
It asks.
It is an advantage of the current invention that the ratio-frequency welded tube technique uses 90%Ar gas and 10% when steel pipe carries out high-frequency welding
The mixed gas of CO2 gas composition is blown from inside to outside to be protected, while the coolant in the bar magnet of induction of high frequency welding machine passes through
Pipeline is recycled to outside steel pipe, and the material of pipeline, using non-magnetic heat-resisting material, the steel pipe after welding is cooled down through air-cooled slot
Afterwards, then water cooled slot cools down.The ratio-frequency welded tube technique can realize normal weld chrome molybdenum steel pipe or height on common high-frequency welding tube mill
Intensity profile automobile using steel pipe, the ratio-frequency welded tube technique high precision machining, stable quality, processing are simple, at low cost, can process
The steel pipe of various specifications.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
On the premise of not departing from present inventive concept, several simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (4)
1. a kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency welded tube technique, comprise the following steps：
A., chrome-molybdenum steel band or high-strength steel strip are cut into the steel band of a fixed-bandwidth；
B. the steel band of fixed-bandwidth is squeezed into steel pipe by multigroup mold；
C. steel pipe is expected into weld holder by Volume, installs induction of high frequency welding machine, protective gas gas blow pipe is installed in steel pipe, passed through
Welding wheel, which squeezes, makes the pipe seam alignment of steel pipe compress and generate certain amount of compression；Welding wheel is made of ceramic material；
D. open and protective gas air blowing protection is carried out at protective gas gas blow pipe butt welding point, open induction of high frequency welding machine and welded
It connects, during welding, electric circle is sheathed on outside steel pipe, and bar magnet is arranged in steel pipe and forms high-frequency induction with electric circle, induction of high frequency welding machine
Coolant in bar magnet is recycled to by pipeline outside steel pipe, and the material of pipeline is using non-magnetic heat-resisting material, the guarantor
The mixed gas that gas forms for 90%AR gas and 10%CO2 gas is protected, the protective gas air blowing flow control is in 15L-20L/
min；The inflatable mouth of protective gas gas blow pipe is from welding central point 1.5mm to 2.5mm；
E. the steel pipe after welding is cooled down through air-cooled slot；
F. water cooled slot cools down the steel pipe through the cooling of air-cooled slot again.
2. chrome-molybdenum steel as described in claim 1 or high intensity mouldability automobile steel ratio-frequency welded tube technique, it is characterised in that：
One group of roll is set before the welding wheel, and the steel pipe is reached after roll at welding wheel.
3. chrome-molybdenum steel as described in claim 1 or high intensity mouldability automobile steel ratio-frequency welded tube technique, it is characterised in that：
One group of roll is set before the air-cooled slot, and the steel pipe after the welding is reached after roll at air-cooled slot.
4. chrome-molybdenum steel as described in claim 1 or high intensity mouldability automobile steel ratio-frequency welded tube technique, it is characterised in that：Institute
The steel pipe after welding is stated to be no less than 20 seconds from the time between air-cooled arrival water cooling.
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| CN201410720551.5A CN104942425B (en) | 2014-12-01 | 2014-12-01 | A kind of chrome-molybdenum steel or high intensity mouldability automobile steel ratio-frequency welded tube technique |
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| CN104942425B true CN104942425B (en) | 2018-05-22 |
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| CN1140116A (en) * | 1995-04-28 | 1997-01-15 | 日本钢管株式会社 | Method for producing electric-resistance-welded steel pipe |
| CN1246084A (en) * | 1997-02-04 | 2000-03-01 | 国际壳牌研究有限公司 | Method and device for joining oilfield tubulars |
| JP2002299031A (en) * | 2001-03-28 | 2002-10-11 | Kobe Steel Ltd | High-frequency induction heating coil, high-frequency induction heating device and method of manufacturing welded pipe |
| CN101474644A (en) * | 2009-01-14 | 2009-07-08 | 中冶辽宁德龙钢管有限公司 | High intensity straight-line joint pipeline steel tube fabrication technique using high-frequency electric resistance welding |
| CN101481995A (en) * | 2008-01-11 | 2009-07-15 | 江苏嘉宝科技制管有限公司 | High steel level petroleum casing pipe and oil pipe manufacturing process |
| CN102825437A (en) * | 2012-08-15 | 2012-12-19 | 山东泰丰钢业有限公司 | ERW (electrical resistance welding) process of high-strength automobile transmission shaft pipe |
-
2014
- 2014-12-01 CN CN201410720551.5A patent/CN104942425B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1140116A (en) * | 1995-04-28 | 1997-01-15 | 日本钢管株式会社 | Method for producing electric-resistance-welded steel pipe |
| CN1246084A (en) * | 1997-02-04 | 2000-03-01 | 国际壳牌研究有限公司 | Method and device for joining oilfield tubulars |
| JP2002299031A (en) * | 2001-03-28 | 2002-10-11 | Kobe Steel Ltd | High-frequency induction heating coil, high-frequency induction heating device and method of manufacturing welded pipe |
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| CN102825437A (en) * | 2012-08-15 | 2012-12-19 | 山东泰丰钢业有限公司 | ERW (electrical resistance welding) process of high-strength automobile transmission shaft pipe |
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