CN101343770A - Piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating plating liquid and plating method - Google Patents
Piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating plating liquid and plating method Download PDFInfo
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- CN101343770A CN101343770A CNA2008100225739A CN200810022573A CN101343770A CN 101343770 A CN101343770 A CN 101343770A CN A2008100225739 A CNA2008100225739 A CN A2008100225739A CN 200810022573 A CN200810022573 A CN 200810022573A CN 101343770 A CN101343770 A CN 101343770A
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Abstract
The invention provides a galvanizing layer galvanizing solution of a piston ring multi-layer chromium-based grid embedded with extra-hard and wear-resistant particles as well as an electroplating method. The components of a plating solution comprise 100 to 400 grams of CrO3, 1 to 4 grams of sulfuric acid analytical pure, 6 to 10 grams of ethanesulfonic acid, 0.5 to 1 grams of lead salt, and 20 to 30 grams of extra-hard particles, balance deionized water. The electroplating method comprises plating solution preparation and electroplating until the thickness of the plating layer meets the requirements. The invention has the advantages: firstly, the thickness of each layer and the width and the depth of the crack can be conveniently controlled; secondly, through adding lead salt into the plating solution, the trivalent chromium in the plating solution can be steadily controlled to be 1 to 10 grams per liter; and thirdly, particles such as SiC, Al2O3 and diamond can be embedded into the multi-layer chromium based grid.
Description
Technical field
The present invention relates to a kind of piston ring coating and electro-plating method, is a kind of piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating plating bath and electro-plating method specifically.
Background technology
Piston ring is the strength member of engine, be directly connected to the serviceability and the work-ing life of engine, and the piston ring excircle surface treatment is a vital operation in the piston ring course of processing.Be to improve wear resistance, the antifriction quality of piston ring, current at present piston ring surface treatment is that sprayed molybdenum, hard chrome plating, flame plating, chromium laminar surface ooze pottery etc.There is the material of a kind of CKS of being called in Germany, this material embeds ceramic particle in the chromium base, it comes down to combine many reticulate patterns chain-wales, inlays the advantage that hard equates surface treatment method, its wear resistance is better than chromium plating, sprayed molybdenum and plasma spraying, and cylinder liner abrasion is relatively low.
At home, ZL02148600.X patent disclosed " chrome-base ceramic composite plating layer working method and piston ring thereof ", its product performance are similar to CKS.
Direct power supply of domestic existing employing and compound electrodeposit method are produced the production technique of multi-layer chromium based gridding built-in superhard abrasion-proof particle coating at present, and this technology can embed particulates such as SiC, Al2O3, diamond in multilayer chromium base net lattice.But there are two shortcomings in above-mentioned technology: 1, power supply adopts common silicon controlled rectifier direct supply, controls each layer quality of coating difficulty; 2, produce this kind coating and must adopt extraordinary anode, the extremely difficult control of trivalent chromium in the solution.
Summary of the invention
Goal of the invention: the objective of the invention is at the deficiencies in the prior art, provide a kind of piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating used plating bath.
Another object of the present invention provides the above-mentioned plating bath of a kind of use and carries out electric plating method.
Technical scheme: the used plating bath of piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating of the present invention, the content in its component and the every liter of plating bath is: CrO
3100～400 grams, the pure 1-4 gram of acid analysis, ethylsulfonic acid 6～10 grams, lead salt 0.5～1 gram, ultra-hard particles 20～30 grams, all the other are deionized water.
Under the situation that does not add lead salt, electroplating process can constantly produce trivalent chromium, the hurried generation of trivalent chromium content in the solution in the short period of time, when content surpasses 10 grams per liters, the electroplating quality straight line descends, and finally can't electroplate, so the present invention has added lead salt when the preparation plating bath.Can produce one deck PbO at anode surface after adding lead salt in the plating bath
2Film, trivalent chromium is at PbO
2Can be converted into sexavalent chrome under the film katalysis, trivalent chromium is stable to be controlled at 1～10 grams per liter thereby make, and plating can normally be carried out.
Use above-mentioned plating bath that piston ring is carried out electric plating method, may further comprise the steps:
1, by the preparation of the content in above-mentioned described component and every liter of plating bath plating bath;
2, stirring plating bath is suspended in the plating bath ultra-hard particles;
3, the heating plating bath makes bath temperature rise to 50～70 ℃;
4, aging plating bath, bath temperature keeps 50～70 ℃;
5, clamping there is the plating mandrel of piston ring put into plating bath, beats DC Forward Current, cover one deck hard chrome coating at the piston ring excircle face;
6, beat the hard chrome coating on reverse dc reverse electrolysis piston ring surface, promptly anti-carve hard chrome coating and make it form tiny crack;
7, stopped outward current 5～30 seconds, make ultra-hard particles enter the grid crackle;
8, export forward current again and carry out forward and electroplate, the grid crackle of imbedded particle is closed, thereby particle is fixed;
According to the difference of the required thickness of coating of piston ring, repeat above-mentioned steps 5～8, reach requirement up to thickness of coating.
In the step 1, described ultra-hard particles is selected from SiC, Al
2O
3Or diamond, or other hard particles, it is of a size of 0.0005～0.005mm.
In the step 2, adopt mechanical process to stir plating bath ultra-hard particles is suspended in the plating bath.
In the step 3, adopt heating tube heating plating bath.
In the step 5, the current density of plating is 30～100A/Dm
2, plating time 10～60 minutes forms the about 0.01～0.08mm of thickness of coating.
In the step 6, the current density that anti-carves can be same as the density in the step 5, also can be different, and the time of anti-carving is 1～120 second, anti-carves dark about 0.008, the wide about 0.005～0.02mm of formed grid crackle.
Because the hard chrome coating internal stress is big, there is the grid crackle in the surface, and the chromium layer of cracks dissolving earlier when beating reversible circulation, so in step 6 is as long as control the grid crackle that the size of reversible circulation and time just can produce appropriate depth and width well.
In the step 8, the current density of plating is 30～100A/Dm
2, plating time is 10～60 minutes, the about 0.02mm of thickness of coating.
By repeating above-mentioned steps 5～8, the final thickness of coating that forms can reach 0.04～0.45mm.
The present invention adopts computer control automatic reverse direct supply, and the automatic reverse direct supply can be implemented on demand just to plate, anti-carve, stops under the control of machine calculation machine, thereby makes each layer coating produce suitable grid crackle, and produces laminate structure.Because computer control automatic reverse direct supply can and not belong to protection scope of the present invention by the known technology realization, therefore it is no longer described in detail.
Electroplating device of the present invention comprises forward cathode block, positive anode seat, reverse cathode block, positive anode, reverse negative electrode, heating tube, cooling tube, stirring pump etc., all is prior art, so also repeat no more at this.
Beneficial effect: the present invention has following advantage: 1, adopt computer control automatic reverse direct supply can control the width of the thickness of each layer, crackle and the degree of depth etc. on demand easily.2, make stable 1～10 grams per liter that is controlled at of trivalent chromium in the plating bath by in plating bath, adding lead salt.3, can in multilayer chromium base net lattice, embed SiC, Al
2O
3, particulate such as diamond, can reach following technical indicator with the piston ring of the present invention's processing: 1) surface hardness reaches 900HV0.1～1200HV0.1; 2) crizzle density is 40～100 crackles/mm; 3) volume percent of superabrasive particle in coating is 1～6%.
Embodiment
Embodiment 1:
1, the component of plating bath and proportioning: CrO
3350 grams per liters, pure 3.5 grams per liters of acid analysis, catalyzer ethylsulfonic acid 8 grams per liters, lead salt 0.8 grams per liter, SiC 25 grams per liters, all the other are deionized water, join solution 3m in above ratio
3
2, with stirring the pump stirred solution, make the SiC particle suspension in solution.
3) the heating plating bath makes bath temperature rise to 70 ℃.
4) aged solution makes that trivalent chromium content is 5 grams per liters in the solution, and bath temperature keeps 70 ℃;
5) computer control automatic reverse direct supply is with 85A/Dm
2Current density plating 10 minutes, the thick about 0.01～0.02mm of coating.
6) computer control automatic reverse direct supply is with 50A/Dm
2Current density anti-carved the about deeply 0.008mm of grid crackle, wide about 0.01mm 100 seconds.
7) computer control automatic reverse direct supply stopped outward current 30 seconds, made the SiC particle that is of a size of 0.0005～0.005mm embed crackle.
8) computer control automatic reverse direct supply is with 30A/Dm
2Current density plating 10 minutes, the thick about 0.01～0.02mm of coating
9) repeat 6～8 steps 14 and time reach 0.19mm until thickness of coating.
Get the plating bath chemical examination after electroplating end, trivalent chromium content is 5 grams per liters, and trivalent chromium does not rise.
Embodiment 2:
1, the component of plating bath and proportioning: CrO
3150 grams per liters, pure 1.5 grams per liters of acid analysis, catalyzer ethylsulfonic acid 6 grams per liters, lead salt 0.5 grams per liter, Al
2O
320 grams per liters, all the other are deionized water, join solution 3m in above ratio
3
2, make Al with stirring the pump stirred solution
2O
3Particle suspension is in solution.
3) the heating plating bath rises to bath temperature: 65 ℃.
4) aged solution makes that trivalent chromium content is 3 grams per liters in the solution, and bath temperature keeps 65 ℃.
5) computer control automatic reverse direct supply is with 75A/Dm
2Current density plating 15 minutes, the thick about 0.01～0.02mm of coating.
6) computer control automatic reverse direct supply is with 60A/Dm
2Current density anti-carved the about deeply 0.008mm of grid crackle, wide about 0.01mm 80 seconds.
7) computer control automatic reverse direct supply stopped outward current 10 seconds, made the Al that is of a size of 0.0005～0.005mm
2O
3Particle embeds crackle.
8) computer control automatic reverse direct supply is with 60A/Dm
2Current density plating 15 minutes, the thick about 0.01～0.02mm of coating.
Repeat 6～8 steps and reach 0.45mm until thickness of coating.
Get the plating bath chemical examination after electroplating end, trivalent chromium content is 3 grams per liters, and trivalent chromium does not rise.
Embodiment 3:
1, the component of plating bath and proportioning: CrO
3100 grams per liters, pure 1 grams per liter of acid analysis, catalyzer ethylsulfonic acid 6 grams per liters, lead salt 0.6 grams per liter, SiC 20 grams per liters, all the other are deionized water, join solution 3m in above ratio
3
2, use the mechanical process stirred solution, make the SiC particle suspension in solution.
3) the heating plating bath makes bath temperature rise to 50 ℃.
4) aged solution makes that trivalent chromium content is 1 grams per liter in the solution, and bath temperature keeps 50 ℃;
5) computer control automatic reverse direct supply is with 100A/Dm
2Current density plating 30 minutes, the thick about 0.02～0.06mm of coating.
6) computer control automatic reverse direct supply is with 80A/Dm
2Current density anti-carved the about deeply 0.008mm of grid crackle, wide about 0.005-0.02mm 10 seconds.
7) computer control automatic reverse direct supply stopped outward current 5 seconds, made the SiC particle that is of a size of 0.0005～0.005mm embed crackle.
8) computer control automatic reverse direct supply is with 100A/Dm
2Current density plating 60 minutes, the thick about 0.01～0.02mm of coating
10) repeat 6～8 steps and reach 0.30mm until thickness of coating.
Get the plating bath chemical examination after electroplating end, trivalent chromium content is 1 grams per liter, and trivalent chromium does not rise.
Embodiment 4:
1, the component of plating bath and proportioning: CrO
3400 grams per liters, pure 4 grams per liters of acid analysis, catalyzer ethylsulfonic acid 10 grams per liters, lead salt 1 grams per liter, diamond 30 grams per liters, all the other are deionized water, join solution 3m in above ratio
3
2, with stirring the pump stirred solution diamond particles is suspended in the solution.
3) the heating plating bath rises to bath temperature: 60 ℃.
4) aged solution makes that trivalent chromium content is 2 grams per liters in the solution, and bath temperature keeps 60 ℃.
5) computer control automatic reverse direct supply is with 30A/Dm
2Current density plating 60 minutes, the thick about 0.06～0.08mm of coating.
6) computer control automatic reverse direct supply is with 80A/Dm
2Current density anti-carved the about deeply 0.008mm of grid crackle, wide about 0.005-0.02mm 120 seconds.
7) computer control automatic reverse direct supply stopped outward current 20 seconds, made the Al that is of a size of 0.0005～0.005mm
2O
3Particle embeds crackle.
8) computer control automatic reverse direct supply is with 50A/Dm
2Current density plating 60 minutes, the thick about 0.01～0.02mm of coating.
Repeat 6～8 steps and reach 0.20mm until thickness of coating.
Get the plating bath chemical examination after electroplating end, trivalent chromium content is 2 grams per liters, and trivalent chromium does not rise.
Claims (8)
1, a kind of piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating plating bath is characterized in that the component of this plating bath and the content in every liter of plating bath are: CrO
3100～400 grams, the pure 1-4 gram of acid analysis, ethylsulfonic acid 6～10 grams, lead salt 0.5～1 gram, ultra-hard particles 20～30 grams, all the other are deionized water.
2, use the described plating bath of claim 1 that piston ring is carried out electric plating method, it is characterized in that this method may further comprise the steps:
(1) by the preparation of the content in above-mentioned described component and every liter of plating bath plating bath;
(2) stirring plating bath is suspended in the plating bath ultra-hard particles;
(3) the heating plating bath makes bath temperature rise to 50～70 ℃;
(4) aging plating bath, bath temperature keeps 50～70 ℃;
(5) clamping there is the plating mandrel of piston ring put into plating bath, beats DC Forward Current, cover one deck hard chrome coating at the piston ring excircle face;
(6) beat the hard chrome coating on reverse dc reverse electrolysis piston ring surface, promptly anti-carve hard chrome coating and make it form tiny crack;
(7) stopped outward current 5～30 seconds, make ultra-hard particles enter the grid crackle;
(8) export forward current again and carry out forward and electroplate, the grid crackle of imbedded particle is closed, thereby particle is fixed;
(9) according to the difference of the required thickness of coating of piston ring, repeat above-mentioned steps (5)～(8), reach requirement up to thickness of coating.
3, electro-plating method according to claim 2 is characterized in that in the step (1), described ultra-hard particles is SiC, Al
2O
3Or diamond, it is of a size of 0.0005～0.005mm.
4, electro-plating method according to claim 2 is characterized in that in the step (2), adopts mechanical process to stir plating bath, and ultra-hard particles is suspended in the plating bath.
5, electro-plating method according to claim 2 is characterized in that in the step (3), adopts heating tube heating plating bath.
6, electro-plating method according to claim 2 is characterized in that in the step (5), the current density of plating is 30～100A/Dm
2, plating time 10～60 minutes.
7, electro-plating method according to claim 2 is characterized in that in the step (6), the time of anti-carving is 1～120 second.
8, electro-plating method according to claim 2 is characterized in that in the step (8), the current density of plating is 30～100A/Dm
2, plating time is 10～60 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100225739A CN101343770A (en) | 2008-08-18 | 2008-08-18 | Piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating plating liquid and plating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100225739A CN101343770A (en) | 2008-08-18 | 2008-08-18 | Piston ring multi-layer chromium based gridding built-in superhard abrasion-proof particle coating plating liquid and plating method |
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| CN101343770A true CN101343770A (en) | 2009-01-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337982A (en) * | 2011-08-25 | 2012-02-01 | 江铃汽车股份有限公司 | Engine piston ring |
| CN102618908A (en) * | 2011-01-31 | 2012-08-01 | 新确有限公司 | Method for making fixed abrasive grain metal wire |
| CN102782192A (en) * | 2010-01-08 | 2012-11-14 | 上村工业株式会社 | Chromium plating method |
| CN109023488A (en) * | 2018-08-16 | 2018-12-18 | 四川理工学院 | A kind of micro-crack hard chrome composite deposite and preparation method thereof |
-
2008
- 2008-08-18 CN CNA2008100225739A patent/CN101343770A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782192A (en) * | 2010-01-08 | 2012-11-14 | 上村工业株式会社 | Chromium plating method |
| CN102782192B (en) * | 2010-01-08 | 2015-09-09 | 上村工业株式会社 | Chrome-plating method |
| CN102618908A (en) * | 2011-01-31 | 2012-08-01 | 新确有限公司 | Method for making fixed abrasive grain metal wire |
| CN102337982A (en) * | 2011-08-25 | 2012-02-01 | 江铃汽车股份有限公司 | Engine piston ring |
| CN109023488A (en) * | 2018-08-16 | 2018-12-18 | 四川理工学院 | A kind of micro-crack hard chrome composite deposite and preparation method thereof |
| CN109023488B (en) * | 2018-08-16 | 2020-06-16 | 四川理工学院 | Micro-crack hard chromium composite coating and preparation method thereof |
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Open date: 20090114 |