CN1824939A - Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring - Google Patents
Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring Download PDFInfo
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- CN1824939A CN1824939A CN 200610039176 CN200610039176A CN1824939A CN 1824939 A CN1824939 A CN 1824939A CN 200610039176 CN200610039176 CN 200610039176 CN 200610039176 A CN200610039176 A CN 200610039176A CN 1824939 A CN1824939 A CN 1824939A
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- piston ring
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Abstract
The invention includes the following steps of preparing the bath (g/l): CrO3 100-400, analytically pure sulfate 1-4, potassium fluosilicate 8-20 and the rest is ionic water; putting the piston ring in the bath and striking forward current to make a hard chromium coating cover on the cylindrical surface; striking backward current make the hard chromium coating on the surface of the piston ring be backcut; adding the supperhard particle into the bath to mix to make it be filled in the network crack on the chromium coating surface of the piston ring; electroplating forward to close the network crack, in order to fix the supperhard particle; repeating the steps 2-5 until the coating thickness can reach the request.
Description
Technical field
The present invention relates to a kind of processing method of piston ring, is a kind of multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method specifically
Background technique
Piston ring is the strength member of motor, be directly connected to the service behaviour and the working life of motor, and the piston ring excircle surface treatment is a vital operation in the piston ring course of working.For improving wear resistance, the antifriction quality of piston ring, the surface treatment of general at present employing piston ring is that methods such as sprayed molybdenum, hard chromium plating, flame spraying are carried out surface peening to it.At present, on the hard plating basis, developed the chromium laminar surface and oozed pottery technique, the conventional composite depositing process of this process using, ceramic particle is electroplated through adding in the hard chromium plating solution after the activation processing, and chromium and ceramic particle parcel deposition form composite bed on the piston ring surface.But because a large amount of liberations of hydrogen during chromium plating cause composite bed ceramic particle content generally to be no more than 1%, and coating comes off after stressed easily.
Summary of the invention
The present invention to solve be exactly the defective that above-mentioned prior art exists, a kind of new multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method is proposed.
The present invention includes following steps:
1, in following ratio preparation plating bath:
CrO
3100-400 grams per liter, the pure 1-4 grams per liter of acid analysis, potassium fluosilicate 8-20 grams per liter, all the other are deionized water;
2, piston ring is put into plating bath, beat forward current, cover one deck hard chromium layers at the piston ring excircle face;
3, beating back current anti-carves the hard network layer on piston ring surface;
Because the dissolving earlier of the chromium layer of the big surface of hard chromium layers internal stress cracks when existing the grid crackle to beat back current, as long as control the grid crack that the size of back current and time just can produce appropriate depth and width like this well.
4, add ultra-hard particles in the plating bath and stir, make it to be suspended in the plating bath and finally insert in the network crack of piston ring chromium laminar surface;
5, carry out forward again and electroplate, the grid crack of imbedded particle is closed, thus with superhard grain fix;
6, according to the difference of the required thickness of coating of piston ring, repeat above-mentioned steps 2-5, reach requirement up to thickness of coating.
After the described plating bath of step 1 prepares, before carrying out subsequent step, should earlier bath temperature be controlled between 40-70 ℃.
In step 2 and the step 5, the current density of plating is 30-100A/Dm
2, plating time 10-60 minute, the about 0.02-0.08mm of thickness of coating.
In the step 3, the current density that anti-carves is with step 1, 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 crack
Ultra-hard particles described in the step 4 such as SiC, Al2O3, diamond, it is of a size of 0.0005-0.005mm.
In the step 5, the current density of plating is identical with step 2 with plating time.
Reach 0.04-0.45mm by the final thickness of coating that forms of above-mentioned 6 steps
Equipment of the present invention comprises forward and reverse rectifier, forward cathode block, positive anode seat, reverse cathode block, positive anode, reverse negative electrode, stirrer, heating pipe, cooling tube etc., all is prior art, so do not repeat them here.
The present invention can embed particulates such as SiC, Al2O3, diamond in multilayer chromium base net lattice, the piston ring of processing with the present invention can reach following technical order:
1. surface hardness reaches 900HV0.1-1200HV0.1
2. crizzle density is 40-100 crackle/mm
3. the percent by volume of superhard wear particle in coating such as aluminium oxide is 2-6%
Embodiment
Embodiment 1:
4102QBZL used for diesel engine piston ring is the main process that the example explanation is produced in the cloud to produce below:
1, prepares plating bath 3m according to the above ratio
3:
CrO3150 grams per liter, pure 1.5 grams per liters of acid analysis, potassium fluosilicate 9 grams per liters, all the other are deionized water, and bath temperature is controlled at: 60 ± 2 ℃
2, piston ring is put into plating bath, beat forward current, with 75A/Dm
2Current density plating 10 minutes, cover one deck hard chromium layers, the thick about 0.01～0.02mm of coating at the piston ring excircle face
3, with 50A/Dm
2Current density the hard network layer in piston ring surface was anti-carved the about deeply 0.008mm of grid crack, wide about 0.005～0.02mm 100 seconds
4, ultra-hard particles SiC, Al2O3, the diamond that will be of a size of 0.0005～0.005mm adds in the plating bath and stirs, make it to be suspended in the plating bath and the final network crack that embeds piston ring chromium laminar surface in.
5, carry out forward again and electroplate, the grid crack of imbedded particle is closed, thereby ultra-hard particles is fixed
6, repeat 2～5 steps 14 and time reach 0.19mm until thickness of coating.
Embodiment 2:
Present embodiment is to produce tin bavin 6DL used for diesel engine piston ring, and its process step is identical with embodiment 1 with condition, and different is the dosing proportioning:
CrO3380 grams per liter, pure 3.5 grams per liters of acid analysis, potassium fluosilicate 19 grams per liters, all the other are deionized water, bath temperature is controlled at: 60 ± 2 ℃.
Claims (7)
1, multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method is characterized in that comprising the steps:
1) in following ratio preparation plating bath:
CrO
3100-400 grams per liter, the pure 1-4 grams per liter of acid analysis, potassium fluosilicate 8-20 grams per liter, all the other are deionized water;
2) piston ring is put into plating bath, beat forward current, cover one deck hard chromium layers at the piston ring excircle face;
3) beating back current anti-carves the hard network layer on piston ring surface;
4) add ultra-hard particles in the plating bath and stir, make it to be suspended in the plating bath and finally insert in the network crack of piston ring chromium laminar surface;
5) carry out forward again and electroplate, the grid crack of imbedded particle is closed, thereby ultra-hard particles is fixed;
6) according to the difference of the required thickness of coating of piston ring, repeat above-mentioned steps 2-5, reach requirement up to thickness of coating.
2, multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method according to claim 1, it is characterized in that the described plating bath of step 1 prepares after, before carrying out subsequent step, should earlier bath temperature be controlled between 40-70 ℃.
3, multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method according to claim 1 is characterized in that in the step 2 that the current density of plating is 30-100A/Dm
2, plating time 10-60 minute, the about 0.02-0.08mm of thickness of coating.
4, multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method according to claim 1, it is characterized in that in the step 3, the current density that anti-carves is with step 1, 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 crack.
5, multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method according to claim 1 is characterized in that ultra-hard particles described in the step 4 such as SiC, Al2O3, diamond, and it is of a size of 0.0005-0.005mm.
6, multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method according to claim 1 is characterized in that step 5, and the current density of plating is 30-100A/Dm
2, plating time is 10-60 minute.
7,, it is characterized in that the final thickness of coating that forms reaches 0.04-0.45mm according to any described multi-layer chromium based gridding built-in superhard abrasion-proof particle coating piston ring processing method of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039176 CN1824939A (en) | 2006-03-29 | 2006-03-29 | Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039176 CN1824939A (en) | 2006-03-29 | 2006-03-29 | Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring |
Publications (1)
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| CN1824939A true CN1824939A (en) | 2006-08-30 |
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| CN 200610039176 Pending CN1824939A (en) | 2006-03-29 | 2006-03-29 | Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449135C (en) * | 2006-09-14 | 2009-01-07 | 江苏仪征金派内燃机配件有限公司 | Processing for piston ring embedded chrome plating impregnated porcelain |
| CN102337982A (en) * | 2011-08-25 | 2012-02-01 | 江铃汽车股份有限公司 | Engine piston ring |
| CN103122470A (en) * | 2011-11-17 | 2013-05-29 | 符士正 | Automobile cast iron die plating solution |
| CN103469283A (en) * | 2013-08-02 | 2013-12-25 | 石家庄金刚凯源动力科技有限公司 | Composite coating piston ring inlaid with wear-resistant particles, and processing method thereof |
| CN103759003A (en) * | 2013-06-26 | 2014-04-30 | 南通星球石墨设备有限公司 | Graphite piston cup |
| CN109236487A (en) * | 2018-11-26 | 2019-01-18 | 耿显虎 | A kind of piston ring |
-
2006
- 2006-03-29 CN CN 200610039176 patent/CN1824939A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449135C (en) * | 2006-09-14 | 2009-01-07 | 江苏仪征金派内燃机配件有限公司 | Processing for piston ring embedded chrome plating impregnated porcelain |
| CN102337982A (en) * | 2011-08-25 | 2012-02-01 | 江铃汽车股份有限公司 | Engine piston ring |
| CN103122470A (en) * | 2011-11-17 | 2013-05-29 | 符士正 | Automobile cast iron die plating solution |
| CN103759003A (en) * | 2013-06-26 | 2014-04-30 | 南通星球石墨设备有限公司 | Graphite piston cup |
| CN103469283A (en) * | 2013-08-02 | 2013-12-25 | 石家庄金刚凯源动力科技有限公司 | Composite coating piston ring inlaid with wear-resistant particles, and processing method thereof |
| CN103469283B (en) * | 2013-08-02 | 2016-03-02 | 石家庄金刚凯源动力科技有限公司 | Inlay composite deposite piston ring and the working method thereof of abrasion-proof particle |
| CN109236487A (en) * | 2018-11-26 | 2019-01-18 | 耿显虎 | A kind of piston ring |
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