CN1655893A - Method for electroplating continuous molds - Google Patents

Method for electroplating continuous molds Download PDF

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Publication number
CN1655893A
CN1655893A CNA038124483A CN03812448A CN1655893A CN 1655893 A CN1655893 A CN 1655893A CN A038124483 A CNA038124483 A CN A038124483A CN 03812448 A CN03812448 A CN 03812448A CN 1655893 A CN1655893 A CN 1655893A
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CN
China
Prior art keywords
casting mold
continuous casting
electrolyte
anode
technology
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.)
Granted
Application number
CNA038124483A
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Chinese (zh)
Other versions
CN100335200C (en
Inventor
A·施蒂利
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SMS Concast AG
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Concast AG
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 Concast AG filed Critical Concast AG
Publication of CN1655893A publication Critical patent/CN1655893A/en
Application granted granted Critical
Publication of CN100335200C publication Critical patent/CN100335200C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08Electroplating with moving electrolyte e.g. jet electroplating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/059Mould materials or platings
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00Processes for servicing or operating cells for electrolytic coating
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00Processes for servicing or operating cells for electrolytic coating
    • C25D21/10Agitating of electrolytes; Moving of racks
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/04Electroplating with moving electrodes
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/18Electroplating using modulated, pulsed or reversing current
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00Electroplating characterised by the article coated
    • C25D7/04Tubes; Rings; Hollow bodies
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10Electrodes, e.g. composition, counter electrode

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Continuous Casting (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

The invention relates to a method for the galvanic coating of a continuous casting mould (2), according to which the inner surfaces (4) of said continuous casting mould (2) that delimit a mould cavity (3) are coated with a coating material to obtain or re-establish target dimensions for the mould cavity. The method uses the continuous casting mould (2) as the cathode, an anode (7) that is located in the mould cavity (3) and an electrolyte (25) that contains the coating material. The electrolyte (25) that acts as the carrier for the coating material is controlled in its passage through the mould cavity (3) of the continuous casting mould (2). During the galvanic coating process, only the inner surfaces of the mould cavity come into contact with the electrolyte and no covering of the outer surfaces of the continuous casting mould is therefore required. The mechanical characteristics can to a great extent be uniformly maintained over the entire area. Said coating can be achieved more rapidly than with conventional methods.

Description

Electroplate the method for continuous casting mold
The present invention relates to a kind of according to the method for chatting the continuous casting mold of the described plating of part before the claim 1.
Casting mold is subjected to continuous wearing and tearing when casting continuously, thereby makes die cavity also make the sectional dimension of continuous billet casting constantly become big.Therefore, after the working cycles of some, described continuous casting mold must upgrade or reprocess.
For making die cavity recover original geometry or predetermined size, the known method that many reprocessing casting molds are arranged.For example, can form casting mold by blast on axle and finish reprocessing.This method is more complicated, costliness and contaminated environment not only, also means the distortion of casting mold profile, thereby and this expansion that involves film water crack on every side also causes negative effect to the cooling of casting mold.Other is known is used for the extrusion process that casting mold reshapes, and wherein pushes casting mold at first from the outside, makes die cavity recover original inside dimension by internal grinding or inner face milling then, also has above-mentioned latter's defective.
At last, known that from EP-A-0 282 759 inner surface that defines die cavity by plating makes the die cavity of casting mold return to preliminary dimension.In this type of technology, the casting mold that serves as negative electrode is immersed in electrolyte bath (copper sulphate bath) with being arranged in the porous anode basket that die cavity is equipped with soluble copper fragment (cube, ball, disk).When being communicated with direct current, copper is separated from electrolyte bath and is deposited on mo(U)ld face, and the dissolved anode copper of the copper of separating from electrolyte bath replaces.In this immersion plating electrolytic process, reached a lower current density, for example about 15A/dm 2By rule of thumb, be generally under the situation of polygonal die cavity at electrolysis immersion plating cross section, the thickness deficiency that has layer in corner regions is that bed thickness only is about danger of 1/4 to 1/10 of other regional bed thickness.This uneven layer structure also can only partly be repaired with special anode shape.This means and to carry out further machinery reprocessing.
Along with further having had the corner bridge result who forms the band enclosed cavity again, the generation of thickness coating makes the casting mold disabled danger that becomes.Another defective of electrolysis immersion plating is that the outer surface of casting mold must cover with the material that electrolytic treatments is inertia.
The objective of the invention is to propose a kind of technology of the above-mentioned type, even in continuous casting mold, also can reach as far as possible simply or reach predetermined cavity dimension again, and the district that can not have problems in the corner regions of die cavity with polygon cross section die cavity by this technology.In addition, the continuous casting mold of plating should keep its external dimensions constant as much as possible.
According to the present invention, this purpose is to realize by a kind of technology with the described feature of claim 1.
Preferred further embodiment of the present invention constitutes the theme of dependent claims.
Use is according to technology of the present invention, wherein use a kind of soluble anode, electrolyte flows through the continuous casting mold die cavity that constitutes negative electrode with a kind of waterpower controlled manner, electrolyte provides coating material alone, because layer structure evenly do not have the corner defective, need not reprocessing with regard to a kind of thin accurate in size anti-friction material coating both can be provided, a kind of thickness coating (only needing few reprocessing at the most with it) can be provided again.A significant advantage according to technology of the present invention is to have only the inner surface of die cavity and electrolyte to come in contact during electroplating, and therefore the outer surface of casting mold needn't be leaveed no choice but cover continuously.In addition, sun intermittently/negative electrode counter-rotating also becomes possibility, thereby can realize the pulsed deposition of coating material and influence plating.
An advantage should emphasizing is, the mechanical performance of coating, and for example hardness and particularly structure are formed and can keep basically identical in whole zones.The acquisition of coating is faster than using traditional handicraft.Can also prevent the cartilaginous tissue on the coating surface to a great extent.
The present invention will be described in more detail by means of accompanying drawing below.
In the accompanying drawings:
Fig. 1 is the schematic diagram according to technology of the present invention.
Fig. 1 has shown that in the mode of pure signal a design is used for the inner surface 4 of the die cavity 3 that defines continuous casting installation for casting 2 is electroplated a kind of wear-resistant coating material, obtaining or to regain the device 1 of predetermined cavity dimension.Thereby die cavity 3 for example can have rectangle or foursquare cross section and be defined by four inner surfaces 4.But casting mold can also have other die cavity cross section (for example annular, polygon, longitudinal angle) or so-called dog-bone casting mold.
The surface of casting mold 2 is provided with top flat and the egative film 5,6 that links together by the anode 7 that runs through die cavity 3 continuously.Continuously the lip-deep seal of casting mold 28,9 seals die cavity 3.Anode 7 is inserted in top flat and the egative film 5,6 with sealing means equally, sees and seals 13,14.Egative film 6 and top flat 5 all have respectively separately at least one, preferred a plurality of openings 11 and 12 (each has only shown an opening 11,12 in Fig. 1), their constitute the electrolyte 25 that will be used for electroplating and introduce or discharge inlet or tap at the die cavity 3 of all airtight formation space reactor of others.With a kind of waterpower controlled manner described electrolyte is passed egative film 6 from liquid storage container 15 by the bottom by means of pump 16 and pump into space reactor, and return liquid storage container 15 and pump 16 along with overflowing (no pressure) top flat 5.Coating material is metered into the electrolyte 25 from container 18 with oxide form.
For electroplating, thereby casting mold 2 can be communicated with DC source 20 with the anode 7 of having indicated the wing 7 ' as negative electrode and forms a DC loop continuously.Seal 8,9 or seal 13,14 and all have the electric insulation effect simultaneously.The shape of cross section of the shape of cross section of anode and die cavity 3 matches.For the polygon die cavity, use corresponding prismatic anode.Anode is made by the titanium material of platinum plating or plating hybrid ceramic or by lead especially.Can also be configured to the multilayer anode.But also can contain coating material in the anode in principle, for example copper, nickel or chromium, and in this case, it is bulk or sheet.
Be suitable for applying for example copper, nickel or chromium layer according to technology of the present invention.Coating material is provided separately by electrolyte 25.Anode itself is insoluble.Anode can be hybrid ceramic and other material of the titanium anode of for example platinum plating, Pb plate anode, plating.Electrolyte can use the electrolyte of methanesulfonic acid, cyanide or sulfuric acid type.Use these high speed electrolytic matter, under the electrolytical situation of strong agitation, can reach 20-40A/dm 2Current density.Flow through space reactor by the control of waterpower effectively electrolyte, because layer is constructed very even and is not had the corner defective, with regard to both may size accurately applying the anti-friction material thin layer and need not to reprocess, may apply thickness coating (at most only needing few reprocessing) again with it.Brought a lot of significant advantage according to technology of the present invention, particularly in chromium plating, because serious corner problem (the thin 5-10 in the thickness specific surface place of layer doubly) can take place in traditional electrodeposited chromium just, and chromium can only be reprocessed by grinding.
Can also realize the pulsed deposition coating material with technology of the present invention, wherein electrolyte 25 provides coating material separately, because except that waterpower control, also can carry out sun intermittently/negative electrode and reverse, and can influence coating.
A significant advantage according to technology of the present invention is to have only the inner surface of die cavity and electrolyte 25 to come in contact when electroplating, therefore needn't cover the outer surface of continuous casting mold.
Anode and/or continuous casting mold can be constructed rotatably around its longitudinal axis in principle, thus the coating that therefore just might when plating, rotate and be improved.
Before coating, continuously casting mold 2 by flushing process particularly the stepwise flushing clean, this is not described in further detail.Casting mold 2 is combined in the system of a sealing when above-mentioned flushing when plating He preferably continuously.
Continuously casting mold is by metal material or composite, as copper, aluminium or nickel, or made by plastics or composite plastic or ceramic material or other material.
A fairing can be provided in addition, can reverse the sense of current to obtain uniform coating by it.
If make coating material with copper in addition, can use commercially available cupric oxide in advance, wherein reduce its too high chlorinity by washing/course of dissolution.
Perhaps, continuously casting mold 2 can be only at some regional plating or plate thicklyer in these zones, promptly Ceng thickness is bigger, degrees of wear in these zone generations in service are higher relatively, for example at the surf zone of bath, particularly owing to the reason of covering material can the outer wearing and tearing of amount.Can obtain effective coating thus.This part plating can cover anode or inserts non-conductive barrier or realize by similar means by part.
In plating is carried out, can generate an electromagnetic field with magnet not shown further, can guide or guide the particle of coating material thus, make in some zone, preferably the fringe region deposition of continuous casting mold identical with other area thickness layer.
Top statement is fully described the present invention.Can certainly describe with other variant.

Claims (14)

1. technology that is used to electroplate continuous casting mold (2), continuous casting mold (2) inner surface (4) that wherein defines die cavity (3) is coated with a kind of coating material to reach or to reach again predetermined cavity dimension, use continuous casting mold (2) as negative electrode, use is arranged in anode (7) and a kind of electrolyte (25) that contains coating material of die cavity (3), the method is characterized in that the electrolyte (25) of the carrier that serves as coating material flows through the die cavity (3) of continuous casting mold (2) with controllable mode.
2. technology according to claim 1 is characterised in that with copper, nickel or chromium and makes coating material, and all is metered in the electrolyte (25) with oxide form in each case.
3. technology according to claim 1 and 2 is characterised in that and uses methanesulfonic acid, cyanide or electrolyte sulfuric acid (25).
4. according to the described technology of one of claim 1-3, being characterised in that with soluble form anode (7) that use, that can also be configured to multilayer anode form, is to constitute by the titanium material of platinum plating or plating hybrid ceramic or by lead.
5. according to the described technology of one of claim 1-4, be characterised in that electrolyte (25) by pump (16) pump into surrounded by the inner surface of die cavity (3) (4) and the surface by egative film and top flat (6,5) enclosed reaction vessel space in, and therefrom return pump (16).
6. according to the described technology of one of claim 1-5, be characterised in that anode (7) and/or continuous casting mold (2) can be rotary configured around its longitudinal axis, therefore make and when plating, to be rotated.
7. according to the described technology of one of claim 1-6, be characterised in that before coating, to continuous casting mold (2) by flushing process particularly stepwise flushing clean.
8. according to the described technology of one of claim 1-7, be characterised in that continuous casting mold (2) is combined in the system of a sealing, to carry out plating and preferably to wash.
9. according to the described technology of one of claim 1-8, be characterised in that continuous casting mold (2),, or constitute by plastics or composite plastic or ceramic material or other material as copper, aluminium or nickel by metal material or composite.
10. according to the described technology of one of claim 1-9, be characterised in that and be furnished with a fairing, but by this device periodic variation sense of current, to obtain uniform coating.
11. technology according to claim 1 is characterised in that if use copper, uses commercially available cupric oxide in advance, wherein reduces its too high chlorinity by washing/course of dissolution.
12., be characterised in that continuous casting mold (2) only the regional plating of higher wearing and tearing takes place or plate thicklyer in some meeting that is in operation according to the described technology of one of claim 1-11.
13. technology according to claim 1 is characterised in that coating material such as copper, nickel or chromium are as anode.
14., be characterised in that the particle of coating material is subjected to electromagnetic field steers in electroplating process, make in some zone, particularly form identical with other area thickness layer at the continuous fringe region of casting mold according to the described technology of one of claim 1-13.
CNB038124483A 2002-05-27 2003-05-19 Process for electrolytic coating of a strand casting mould Expired - Fee Related CN100335200C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH0876/02 2002-05-27
CH8762002 2002-05-27
CH20020876/2002 2002-05-27

Publications (2)

Publication Number Publication Date
CN1655893A true CN1655893A (en) 2005-08-17
CN100335200C CN100335200C (en) 2007-09-05

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EP (1) EP1507612B1 (en)
JP (1) JP5008111B2 (en)
KR (1) KR101082896B1 (en)
CN (1) CN100335200C (en)
AU (1) AU2003236679B2 (en)
BR (1) BR0311374B1 (en)
CA (1) CA2504369C (en)
ES (1) ES2452727T3 (en)
MX (1) MXPA04011734A (en)
PL (1) PL206254B1 (en)
RU (1) RU2318631C2 (en)
WO (1) WO2003099490A1 (en)
ZA (1) ZA200408991B (en)

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CN107034497A (en) * 2017-04-28 2017-08-11 长安大学 A kind of electroplanting device for oil well pipe box cupling inner surface

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Publication number Publication date
BR0311374B1 (en) 2011-08-23
CA2504369A1 (en) 2003-12-04
WO2003099490A1 (en) 2003-12-04
JP5008111B2 (en) 2012-08-22
AU2003236679A1 (en) 2003-12-12
ES2452727T3 (en) 2014-04-02
JP2005527705A (en) 2005-09-15
KR20050004877A (en) 2005-01-12
PL371684A1 (en) 2005-06-27
PL206254B1 (en) 2010-07-30
BR0311374A (en) 2005-03-15
MXPA04011734A (en) 2005-11-04
EP1507612A1 (en) 2005-02-23
RU2318631C2 (en) 2008-03-10
CA2504369C (en) 2008-11-18
EP1507612B1 (en) 2013-12-11
RU2004138096A (en) 2005-06-10
KR101082896B1 (en) 2011-11-11
AU2003236679B2 (en) 2008-08-28
ZA200408991B (en) 2007-08-29
CN100335200C (en) 2007-09-05

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