CN105442009A - Method for repairing metal base defect and improving galvanized coating quality - Google Patents
Method for repairing metal base defect and improving galvanized coating quality Download PDFInfo
- Publication number
- CN105442009A CN105442009A CN201510866324.8A CN201510866324A CN105442009A CN 105442009 A CN105442009 A CN 105442009A CN 201510866324 A CN201510866324 A CN 201510866324A CN 105442009 A CN105442009 A CN 105442009A
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- CN
- China
- Prior art keywords
- metallic matrix
- coating quality
- shot peening
- metal base
- improves
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to a method for repairing the metal base defect and improving the galvanized coating quality. The method is characterized in that firstly, a metal base is machined according to a conventional process; then stress peening strengthening is carried out on the surface of the metal base; and finally the galvanizing process is implemented. Pellets for stress peening strengthening are cast steel pills or ceramic pills or glass pills.
Description
Technical field
The present invention relates to the special processing technique field of a kind of metal, the method of electrolytic coating quality is improved particular by reparation metallic matrix, be particularly suitable for surface and subsurface and there is repair process to matrix before the plating of the metallic substance foundry goods of the textural defect such as hole, crackle, slag inclusion, forging or welding joint, the surface after plating is made to obtain continuous, uniform coating microstructure, improve protective capacities and the conforming product rate of coating, improve the work-ing life of workpiece.
Background technology
Plating is one of method most economical in Surface Engineering, be by electrochemical method by the metal ion deposition in solution to workpiece surface, obtain a kind of technological process of functional protective layer.In this process, need the matrix surface of deposited plating layer must distribute enough power lines, there is the ability of exchang electron under relatively low electromotive force effect.
Metallic substance foundry goods, inevitably there is hole in surface and the subsurface of forging or weldment joint area, crackle, the textural defect such as slag inclusion, although these textural defect are castings, forging or weldprocedure allow, but the hole that these defects cause and crack site are the unregulated power line regions of metal base surface vacancy, slag inclusion position forms the unregulated power line region of surperficial vacancy in treating processes because slag inclusion dissolves, or the material parcel to be differed from by conductive capability because slag inclusion and formed can not the region of normal exchang electron, therefore the position of these textural defect does not possess the primary condition being obtained settled layer by plating, the coating after plating is made to occur non-continuous event.In use these defects will become source of corrosion, reduce the resistance to corrosion of coating, thus reduce the work-ing life of workpiece
At present, also there is no to eliminate the technology of this electrolytic coating quality caused due to matrix metal tissue defects, can only by strictly controlling casting, forging or weldprocedure, reduce as far as possible and reduce to be present in the textural defect such as hole, crackle, slag inclusion on the front workpiece of plating, and allow to there is the electrolytic coating mass defect caused due to matrix metal tissue defects, give tacit consent to the phenomenon in this reduction coating integral protection ability and product work-ing life.
Summary of the invention
The object of the present invention is to provide and a kind ofly repair the method that metallic matrix improves electrolytic coating quality.
A kind ofly repair the method that metallic matrix improves electrolytic coating quality, it is characterized in that, first conveniently technique carries out mechanical workout to metallic matrix, again shot peening is carried out to the surface of metallic matrix, finally implement electroplating technology, the bullet that described shot peening strengthening adopts is cast steel ball or ceramic pellet or glass ball.
The beneficial effect of the application is: 1) adopting before plating needs the surface of plating and subsurface to carry out the mode of repeat impact process to metallic matrix, make it that viscous deformation occur, make to be present in metallic substance foundry goods, the surface of forging or weldment joint and the hole of subsurface and crackle are made up, slag inclusion obtains densification, main purpose provides for during plating the power line that distribution is enough, the ability of exchang electron under relatively low electromotive force effect, the surface after plating is made to obtain continuously, uniform coating microstructure, improve protective capacities and the conforming product rate of coating, improve the work-ing life of workpiece.2) the shot-peening surface that is metallic substance and subsurface provide viscous deformation, with the bullet of appropriate size, with suitable intensity and fraction of coverage, shock treatment is carried out to metallic substance, surface metal is made to produce surrender and viscous deformation occurs and leaves crater on surface, thus will foundry goods, forging or the surface of weldment joint and the hole of subsurface and crackle be made up, even disappear, make slag inclusion position obtain densification and intensive treatment, improve anti-fatigue ability and the work-ing life of electroplating parts.
Embodiment
Welding work pieces joint before plating, first through mechanical workout, the defect of the welding work pieces metallic matrix such as porous, slag inclusion that weldprocedure can allow by mechanical workout comes out, in order to prevent these defects, detrimentally affect is produced to plating subsequently, adopt the method that this patent provides, next carry out shot peening to the surface of the metallic matrix of welding workpiece joints, finally implement electroplating technology, the bullet that shot peening strengthening adopts is cast steel ball or ceramic pellet or glass ball.The bullet specification of shot peening strengthening is 0.1mm ~ 1.0mm, be preferably 0.1mm ~ 0.4mm, the shock strength of shot-peening is 0.08mmA ~ 0.40mmA, and angle of attack is 45 ° ~ 90 °, this angle of attack is bullet stream and is sprayed the angle on surface, and impacting fraction of coverage is 100% ~ 600%.
Shot peening strengthening can form little crater to metal base surface, in order to improve the surface quality of the front metallic matrix of plating further, when conveniently technique carries out mechanical workout to metallic matrix, preferably leading roughing, retain metallic matrix surplus 0.01mm ~ 0.20mm, on rough machined basis, carried out shot peening strengthening shock treatment to metallic matrix, the surplus removing metallic matrix after shot peening strengthening shock treatment again meets the needs of plating.
Before plating repair process is carried out to the metallic matrix of workpiece, the defect structure of workpiece surface and subsurface can be eliminated, final electrolytic coating quality is improved, improve the resistance to corrosion of coating, thus improve the work-ing life of workpiece.
Claims (4)
1. repair the method that metallic matrix improves electrolytic coating quality for one kind, it is characterized in that, first conveniently technique carries out mechanical workout to metallic matrix, again shot peening is carried out to the surface of metallic matrix, finally implement electroplating technology, the bullet that described shot peening strengthening adopts is cast steel ball or ceramic pellet or glass ball.
2. reparation metallic matrix as claimed in claim 1 improves the method for electrolytic coating quality, it is characterized in that first conveniently technique is carried out mechanical workout to metallic matrix and retained metallic matrix surplus 0.01mm ~ 0.20mm, removes metallic matrix surplus again after shot peening strengthening shock treatment.
3. reparation metallic matrix as claimed in claim 1 improves the method for electrolytic coating quality, it is characterized in that the bullet specification of described shot peening strengthening is 0.1mm ~ 1.0mm, shock strength is 0.08mmA ~ 0.40mmA, and angle of attack is 45 ° ~ 90 °, and impacting fraction of coverage is 100% ~ 600%.
4. reparation metallic matrix as claimed in claim 3 improves the method for electrolytic coating quality, it is characterized in that described bullet specification is 0.1mm ~ 0.4mm's.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510866324.8A CN105442009A (en) | 2015-11-30 | 2015-11-30 | Method for repairing metal base defect and improving galvanized coating quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510866324.8A CN105442009A (en) | 2015-11-30 | 2015-11-30 | Method for repairing metal base defect and improving galvanized coating quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105442009A true CN105442009A (en) | 2016-03-30 |
Family
ID=55552627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510866324.8A Pending CN105442009A (en) | 2015-11-30 | 2015-11-30 | Method for repairing metal base defect and improving galvanized coating quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105442009A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226290A (en) * | 2011-06-14 | 2011-10-26 | 西安飞机工业（集团）有限责任公司 | Method for densifying electroplating hard chromium layer |
| CN104999240A (en) * | 2015-07-31 | 2015-10-28 | 江苏曜曜铸业有限公司 | Gear machining and treating process |
-
2015
- 2015-11-30 CN CN201510866324.8A patent/CN105442009A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226290A (en) * | 2011-06-14 | 2011-10-26 | 西安飞机工业（集团）有限责任公司 | Method for densifying electroplating hard chromium layer |
| CN104999240A (en) * | 2015-07-31 | 2015-10-28 | 江苏曜曜铸业有限公司 | Gear machining and treating process |
Non-Patent Citations (3)
| Title |
|---|
| 丁丽丽等: "直升机齿轮喷丸-电刷镀复合修复工艺研究", 《表面技术》 * |
| 于芝兰主编: "《金属防护工艺原理》", 31 August 1990 * |
| 陈名华等: "飞机起落架的喷丸-电刷镀复合修复工艺研究", 《第二届中国航空学会青年科技论坛文集》 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |
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| RJ01 | Rejection of invention patent application after publication |