CN103469283B - Inlay composite deposite piston ring and the working method thereof of abrasion-proof particle - Google Patents
Inlay composite deposite piston ring and the working method thereof of abrasion-proof particle Download PDFInfo
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- CN103469283B CN103469283B CN201310335480.2A CN201310335480A CN103469283B CN 103469283 B CN103469283 B CN 103469283B CN 201310335480 A CN201310335480 A CN 201310335480A CN 103469283 B CN103469283 B CN 103469283B
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Abstract
The invention discloses a kind of composite deposite piston ring inlaying abrasion-proof particle, the body comprising cast iron quality and the composite deposite be plated on body cylindrical, composite deposite is the galvanization coating of the reticulate pattern inlaying abrasion-proof particle, abrasion-proof particle be silicon carbide, silicon-dioxide, alchlor, adamantine one or more.Inlay the working method of the composite deposite piston ring of abrasion-proof particle, comprise preparation composite plating liquor, the concentration of chromic anhydride is 200 ~ 400 grams per liters, the concentration of sulfuric acid is 2 ~ 6 grams per liters, benzoic concentration is 4 ~ 10 grams per liters, abrasion-proof particle 100 ~ 130 grams per liter; Forming one deck hard chrome by applying forward current on piston ring body surface, applying reversible circulation and anti-carving, anti-carving abrasion-proof particle in process and be adsorbed in crack, be embedded in composite deposite through repeatable operation abrasion-proof particle.Product of the present invention has the advantages that wear resisting property is good, oil storage performance is high, the life-span is long, and production method of the present invention is simple to operate, stable.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to a kind of composite deposite piston ring inlaying abrasion-proof particle.
Background technology
Piston ring is one of most important part in engine, and be mainly used in the oil engines such as petrol motor, diesel engine, engineering machinery, water pump, its working conditions is very severe.Usually, fuel burns in the cylinder and makes piston, piston-ring packing to-and-fro movement, due to the effect of cylinder combustion pressure, causes piston ring and cylinder wall surface abrasion.In order to reduce the wearing and tearing between piston ring and cylinder wall, except adding lubricant, processing mode carries out chromium plating process to piston ring widely at present.But along with the fast development of oil engine industry, piston ring requires that working temperature is high, thermal shocking is large, speed is high, the life-span is long, friction is frequent, and traditional piston ring single-material surface treatment mode can not be satisfied the demand.
Summary of the invention
The technical issues that need to address of the present invention are to provide the composite deposite piston ring inlaying abrasion-proof particle and working method thereof that a kind of wear resisting property is good, oil storage performance is high, the life-span is long.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
Inlay the composite deposite piston ring of abrasion-proof particle, the body comprising cast iron quality and the composite deposite be plated on body cylindrical, composite deposite is the galvanization coating of the reticulate pattern inlaying abrasion-proof particle, and described abrasion-proof particle is silicon carbide, silicon-dioxide, alchlor, one or more combination adamantine.
Improvement of the present invention is: the reticulate pattern density of described composite deposite is 40 ~ 100 reticulate patterns/mm, reticulate pattern width 1 ~ 5 μm, the reticulate pattern degree of depth 2 ~ 20 μm, and the hardness of composite deposite is 900 ~ 1200HV
0.1, the thickness of composite deposite is 0.05 ~ 0.20mm.
Further improvement of the present invention is: the particle diameter of described abrasion-proof particle is 0.5 ~ 5 μm, and the mass percent of abrasion-proof particle in composite deposite is 2 ~ 6%.
Inlay the working method of the composite deposite piston ring of abrasion-proof particle, comprise the steps:
A. composite plating liquor is prepared: the deionized water adding 2/3 volume in chrome-plating bath, add chromic anhydride, phenylformic acid, sulfuric acid successively again, stirring makes chromic anhydride and phenylformic acid fully dissolve, and abrasion-proof particle is added in whipping process, again add deionized water to working level, the solution of preparation requires that the concentration of chromic anhydride is 200 ~ 400 grams per liters, the concentration of sulfuric acid is 2 ~ 6 grams per liters, benzoic concentration is 4 ~ 10 grams per liters, abrasion-proof particle 100 ~ 130 grams per liter, and the temperature being controlled the composite plating liquor made in chrome-plating bath by the mode of heating in water bath is 50 ~ 70 DEG C;
Described abrasion-proof particle is silicon carbide, silicon-dioxide, alchlor, one or more combination adamantine, and the particle diameter of abrasion-proof particle is 0.5 ~ 5 μm;
B. the body of cast iron quality is connected as the negative electrode electroplated with the negative pole of rectifier, insoluble material is connected as anode with the positive pole of rectifier, anode and negative electrode are placed in the composite plating liquor of chrome-plating bath; Simultaneously by mechanical stirring composite plating liquor, abrasion-proof particle is kept to suspend in the solution;
C. apply DC Forward Current between the anode and cathode, current density is 20 ~ 100A/dm
2, application time is 40 ~ 60 minutes, forms one deck hard chrome coating at body outer surface;
D. apply reverse dc between the anode and cathode, the hard chrome coating of piston ring surface oppositely etches formation reticulate pattern, and the abrasion-proof particle suspended in solution is adsorbed in the crack of reticulate pattern, and current density is 20 ~ 100A/dm
2, application time is 20 ~ 80 seconds;
E. apply DC Forward Current between the anode and cathode, the reticulate pattern outside surface that body outer surface is inlaid with abrasion-proof particle forms one deck hard chrome again, is wrapped by abrasion-proof particle;
F. according to coating design thickness, repeating step C ~ E, until reach coating to reach design requirements.
The present invention inlays in the working method of composite deposite piston ring of abrasion-proof particle, and the concentration of the trivalent chromic ion produced in step C and step D controls to be 2 ~ 8 grams per liters.
Owing to have employed technique scheme, the technical progress that the present invention obtains is:
Abrasion-proof particle is added in Cr-plating Bath by the present invention, in chrome-plating process, on piston ring excircle, plating one deck inlays the composite deposite of abrasion-proof particle, because the hardness of abrasion-proof particle own is very high, have good wearability, and be embedded in the crackle of chromium coating with trellis state, define netted friction support face, wear resistance improves 2.6 ~ 4 times than common chromium coating, substantially increase the wear resistance of piston ring, layers of chrome reticulate pattern turn improves the oil storage performance of working face simultaneously, reduce the frictional coefficient of piston ring, reduce friction power loss, thus extend the work-ing life of piston ring, reduce the replacing of user, maintenance cost.Special high-speed Diesel fuel engine more than 300 horsepowers adopts this kind of surface-treated piston ring; engine power can be improved; reduce fuel oil, consumption of lubricating oil; extend the work-ing life of engine; reduce discharge and the work noise of pollution substance, reach the object of saving petroleum-based energy, environment protection.
The abrasion-proof particle surfactivity that the present invention uses is high, can in piston ring surface strong adsorption, not only as disperse phase, wear-resisting bearing surface is formed during piston ring work, form crystallization nuclei as the special crystalline elemental in electrocrystallization process simultaneously, composite deposite crystal grain containing abrasion-proof particle is careful, non-directional, and its wear resistance improves 260 ~ 400% than common chromium coating.
First the present invention applies DC Forward Current by rectifier in electroplating process, plated body is as negative electrode, nominal price chromium ion in composite plating solution is reduced to chromium metal and is plated on the outside surface of body, but because the inside of electrolytic coating own exists internal stress, there is crack in electrolytic coating surface, when applying reverse dc, after near crack, chromium metal is easily oxidized to chromium ion, electrolytic coating surface forms the reticulate pattern of definite shape, by controlling size and the application time of reversible circulation, easily can control the density of electrolytic coating reticulate pattern, the degree of depth, width, when applying reverse dc simultaneously, abrasion-proof particle in composite plating liquor enters into the crack of reticulate pattern in moving process, again apply DC Forward Current, the chromium ion not adding the composite plating liquor kind of abrasion-proof particle is plated on the coating surface inlaying abrasion-proof particle, play the effect of firm abrasion-proof particle.
Working method of inlaying the composite deposite piston ring of abrasion-proof particle of the present invention can stabilize and increase the bonding strength of layers of chrome and body, improve product surface roughness, reduce apparent waste product in product processing, stablize the various process parameters (as chromic concentration) of electroplating process, reduce liberation of hydrogen intensity, improve process electrical efficiency, release products layers of chrome internal stress, reach the consistence of product indices, improve batch operability of producing.
The present invention's composite plating liquor in electroplating process is in mechanical stirring always, abrasion-proof particle can enter into by physical adsorption and mechanical agitation power the crack that coating anti-carves, and can by controlling the size of the concentration of the abrasion-proof particle inlayed in churned mechanically intensity effect coating.
Accompanying drawing explanation
Fig. 1 is front view of the present invention;
Fig. 2 is A-A direction view of the present invention;
Fig. 3 is the schematic cross-section of composite deposite of the present invention;
Fig. 4 is the metallographic schematic cross-section of composite deposite of the present invention.
Wherein, 1, body, 2, composite deposite, 3, abrasion-proof particle.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further details:
Inlay the composite deposite piston ring of abrasion-proof particle, its structural representation as shown in Figure 1, Figure 2 and Figure 3, comprises body 1 and composite deposite 2, and composite deposite 2 covers on body 1 cylindrical; Body 1 is cast iron materials, and composite deposite 2 is for inlaying the coating of abrasion-proof particle 3, and form reticulate pattern in composite deposite, abrasion-proof particle is embedded in composite deposite reticulate pattern; Abrasion-proof particle 3 be silicon carbide, silicon-dioxide, alchlor, adamantine one or more, the particle diameter of abrasion-proof particle 3 is 0.5 ~ 5 μm, and the mass percent of abrasion-proof particle in composite deposite 2 is 2 ~ 6%.
The reticulate pattern density of composite deposite 2 is 40 ~ 100 reticulate patterns/mm, reticulate pattern width 1 ~ 5 μm, the reticulate pattern degree of depth 2 ~ 20 μm, and the hardness of composite deposite is 900 ~ 1200HV0.1, and the thickness of composite deposite is 0.05 ~ 0.20mm.
Inlay the working method of the composite deposite piston ring of abrasion-proof particle, comprise the steps:
A. composite plating liquor is prepared: the deionized water adding 2/3 volume in chrome-plating bath, add chromic anhydride, phenylformic acid, sulfuric acid successively again, stirring makes chromic anhydride and phenylformic acid fully dissolve, and abrasion-proof particle is added in whipping process, again add deionized water to working level, the solution of preparation requires that the concentration of chromic anhydride is 200 ~ 400 grams per liters, the concentration of sulfuric acid is 2 ~ 6 grams per liters, benzoic concentration is 4 ~ 10 grams per liters, abrasion-proof particle 100 ~ 130 grams per liter, and the temperature being controlled the composite plating liquor made in chrome-plating bath by the mode of heating in water bath is 50 ~ 70 DEG C;
B. by mechanical stirring composite plating liquor, abrasion-proof particle is kept to suspend in the solution;
C. body is connected as the negative electrode electroplated with the negative pole of rectifier, insoluble material is connected as anode with the positive pole of rectifier, anode and negative electrode are placed in the composite plating liquor of chrome-plating bath;
D. apply DC Forward Current to rectifier, current density is 20 ~ 100A/dm
2, application time is 40 ~ 60 minutes, forms one deck hard chrome at body surface;
E. regulate rectifier to apply reverse dc, current density is 20 ~ 100A/dm
2, application time is 20 ~ 80 seconds, and the hard chrome coating of piston ring surface oppositely etches formation reticulate pattern, and the abrasion-proof particle suspended in solution is adsorbed in the crack of reticulate pattern;
F. regulate rectifier to apply DC Forward Current, the reticulate pattern outside surface that body outer surface is inlaid with abrasion-proof particle forms one deck hard chrome again, is wrapped by abrasion-proof particle;
G. according to coating design thickness, repeating step C ~ F, until reach coating to reach design requirements.
In electroplating process, composite plating liquor is in mechanical stirring always, and in electroplating process, chromic anhydride generation electrochemical reaction is reduced to trivalent chromic ion, and the concentration of the trivalent chromic ion produced in rate-determining steps D and step e is 2 ~ 8 grams per liters.
Following table is the embodiment of the Composite Coatings piston ring utilizing the working method of inlaying the composite deposite piston ring of abrasion-proof particle to prepare.
Claims (2)
1. inlay the working method of the composite deposite piston ring of abrasion-proof particle, it is characterized in that: the body (1) that described piston ring comprises cast iron quality and the composite deposite (2) be plated on body (1) cylindrical, composite deposite (2) for inlaying the galvanization coating of the reticulate pattern of abrasion-proof particle (3), described abrasion-proof particle (3) is silicon carbide, silicon-dioxide, alchlor, one or more combination adamantine;
The reticulate pattern density of described composite deposite (2) is 47 ~ 80 reticulate patterns/mm, reticulate pattern width 1 ~ 4.8 μm, the reticulate pattern degree of depth 2 ~ 7.2 μm or 10.1 ~ 20 μm, and the hardness of composite deposite is 980 ~ 1150HV
0.1, the thickness of composite deposite is 0.05 ~ 0.20mm;
The working method of described piston ring comprises the steps:
A. composite plating liquor is prepared: the deionized water adding 2/3 volume in chrome-plating bath, add chromic anhydride, phenylformic acid, sulfuric acid successively again, stirring makes chromic anhydride and phenylformic acid fully dissolve, and abrasion-proof particle is added in whipping process, again add deionized water to working level, the solution of preparation requires that the concentration of chromic anhydride is 200 ~ 400 grams per liters, the concentration of sulfuric acid is 2 ~ 6 grams per liters, benzoic concentration is 4 ~ 10 grams per liters, abrasion-proof particle 100 ~ 130 grams per liter, and the temperature being controlled the composite plating liquor made in chrome-plating bath by the mode of heating in water bath is 50 ~ 70 DEG C;
Described abrasion-proof particle (3) is silicon carbide, silicon-dioxide, alchlor, one or more combination adamantine, the particle diameter of abrasion-proof particle (3) is 0.8 ~ 4.3 μm;
B. the body (1) of cast iron quality is connected as the negative electrode electroplated with the negative pole of rectifier, insoluble material is connected as anode with the positive pole of rectifier, anode and negative electrode is placed in the composite plating liquor of chrome-plating bath; Simultaneously by mechanical stirring composite plating liquor, abrasion-proof particle is kept to suspend in the solution;
C. apply DC Forward Current between the anode and cathode, current density is 20 ~ 100A/dm
2, application time is 40 ~ 60 minutes, forms one deck hard chrome coating at body (1) outside surface;
D. apply reverse dc between the anode and cathode, the hard chrome coating of piston ring surface oppositely etches formation reticulate pattern, and the abrasion-proof particle suspended in solution is adsorbed in the crack of reticulate pattern, and current density is 20 ~ 100A/dm
2, application time is 20 ~ 80 seconds;
E. apply DC Forward Current between the anode and cathode, the reticulate pattern outside surface that body outer surface is inlaid with abrasion-proof particle forms one deck hard chrome again, is wrapped by abrasion-proof particle;
F. according to coating design thickness, repeating step C ~ E, until reach coating design requirement;
The concentration of the trivalent chromic ion produced in step C and step D is 2 ~ 8 grams per liters.
2. working method of inlaying the composite deposite piston ring of abrasion-proof particle according to claim 1, is characterized in that: the particle diameter of described abrasion-proof particle (3) is 0.8 ~ 4.3 μm, and the mass percent of abrasion-proof particle in composite deposite is 2 ~ 6%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310335480.2A CN103469283B (en) | 2013-08-02 | 2013-08-02 | Inlay composite deposite piston ring and the working method thereof of abrasion-proof particle |
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| CN201310335480.2A CN103469283B (en) | 2013-08-02 | 2013-08-02 | Inlay composite deposite piston ring and the working method thereof of abrasion-proof particle |
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| CN103469283B true CN103469283B (en) | 2016-03-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105506713B (en) * | 2014-09-25 | 2018-05-08 | 通用电气公司 | Method, electrolyte used and the coating formed of chromium base coating are formed by plating |
| CN109023488B (en) * | 2018-08-16 | 2020-06-16 | 四川理工学院 | Micro-crack hard chromium composite coating and preparation method thereof |
| EA036801B1 (en) * | 2020-02-25 | 2020-12-22 | Евгений Владимирович Князев | Method of obtaining antiwear chromium platings on outer and inner metal surfaces of articles |
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|---|---|---|---|---|
| US4472249A (en) * | 1981-08-24 | 1984-09-18 | M&T Chemicals Inc. | Bright chromium plating baths and process |
| CN1424436A (en) * | 2002-12-23 | 2003-06-18 | 仪征双环活塞环有限公司 | Chromium based ceramic composite coating process and piston ring thereby |
| CN1824939A (en) * | 2006-03-29 | 2006-08-30 | 南京飞燕活塞环股份有限公司 | Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring |
| CN202883145U (en) * | 2012-10-24 | 2013-04-17 | 仪征双环活塞环有限公司 | Anti-abrasion piston ring of internal combustion engine |
-
2013
- 2013-08-02 CN CN201310335480.2A patent/CN103469283B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4472249A (en) * | 1981-08-24 | 1984-09-18 | M&T Chemicals Inc. | Bright chromium plating baths and process |
| CN1424436A (en) * | 2002-12-23 | 2003-06-18 | 仪征双环活塞环有限公司 | Chromium based ceramic composite coating process and piston ring thereby |
| CN1824939A (en) * | 2006-03-29 | 2006-08-30 | 南京飞燕活塞环股份有限公司 | Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring |
| CN202883145U (en) * | 2012-10-24 | 2013-04-17 | 仪征双环活塞环有限公司 | Anti-abrasion piston ring of internal combustion engine |
Non-Patent Citations (1)
| Title |
|---|
| 镀铬添加剂及其作用原理新探讨;吴双成;《2009年全国电子电镀及表面处理学术交流会论文集》;20091231;第507-510页 * |
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