CN102705100A - Internal combustion engine piston provided with composite layer and manufacturing method thereof - Google Patents
Internal combustion engine piston provided with composite layer and manufacturing method thereof Download PDFInfo
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- CN102705100A CN102705100A CN2012101917413A CN201210191741A CN102705100A CN 102705100 A CN102705100 A CN 102705100A CN 2012101917413 A CN2012101917413 A CN 2012101917413A CN 201210191741 A CN201210191741 A CN 201210191741A CN 102705100 A CN102705100 A CN 102705100A
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- piston
- combustion engine
- internal combustion
- phosphatization
- water washing
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Abstract
The invention discloses an internal combustion engine piston provided with a composite layer and a manufacturing method thereof, wherein a basal body is made of an Al-Si alloy; the integral outer surface of the piston is processed through phosphatization and is used as an adhesion bottom layer, then the outer surface of a head part of the piston is processed through ceramic stratification, and the outer surface of a skirt section is processed through graphite stratification. The phosphatization treatment comprises the following procedures: chemical degreasing, cold water washing, phosphatization, cold water washing, distilled water washing and drying; the graphite stratification comprises the following procedures: ultrasonic degreasing, cleaning, hot water washing, cold water washing, drying, constant temperature, coating printing, standing and solidification; and the ceramic stratification comprises the following procedures: chemical degreasing, hot water washing, cold water washing, drying, ceramic plating treatment, cold water washing and drying. The internal combustion engine piston has the benefits as follows: abrasion resistance and corrosion resistance are achieved, better high temperature impact resisting performance can be achieved, and lubricating property is improved; in addition, the mechanical efficiency is improved, the contents of CO and HC in exhaust emission are decreased, and the durability is improved after the piston is installed.
Description
Technical field
The present invention relates to a kind of internal combustion engine, be specially a kind of internal combustion engine and production method thereof with composite bed.
Background technique
Piston is the key components and parts of internal-combustion engine; It is worked under high temperature (more than 350 ℃), friction condition; Piston performance and behaviour in service all have very big influence to energy consumption, exhaust emissions, noise etc., improve the hot strength and the wear resistance of piston, reduce expansion coefficient, improve volume stability; Weight reduction is the important trend of domestic and international piston research.Along with energy-saving and environmental protection require urgent day by day, improve FT, reduce cylinder prepareding gap, reduce the important trend that oil consumption has become engine design.Scientific and technical personnel have implemented various behaves both at home and abroad for this reason: as: " the whole anodization of piston " " Ni-SiC composite plating " " plasma gas-phase deposit ceramic treatment ", " the spraying teflon is handled " etc.; But consider factors such as complex process degree, cost control, service condition, above method each has different application area limitations.
Summary of the invention
The deficiency that the objective of the invention is to overcome that internal combustion engine reply temperature is high, thermal shock is big, speed is high, friction occurs in frequent; The whole phosphatization of piston, skirt section cylindrical silk-screen printing graphite, top ceramic treatment technology are applied to same piston; A kind of internal combustion engine with composite bed is provided, the combination property of piston is improved.
The objective of the invention is to realize like this: a kind of internal combustion engine with composite bed; Its basic material is the Al-Si alloy; The whole matrix appearance of piston has the phosphatization processing layer as adhesion layer, and piston skirt phosphatization processing layer outer surface has graphite layer, and piston head phosphatization processing layer outer surface has ceramic layer.
Said phosphating coating thickness is 1-3um, said graphite layer thickness 10-15um, said ceramic layer thickness 40-150um.
A kind of method of the internal combustion engine with composite bed, outer surface of piston adopt whole phosphatization to handle, and piston crown adopts the electro-plated pottery processing, and the silk-screen printing graphite treatment is adopted in the piston skirt.
The concrete technological process of described phosphatization is: electrochemical deoiling-Cold Wash-phosphatization-Cold Wash-distillation washing-oven dry; The phosphating process condition comprises clean time, phosphating solution temperature, phosphating time, distilled water conductivity, bake out temperature, drying time;
The process conditions of described phosphatization are: clean time 2-3min, 50-70 ℃ of phosphating solution temperature, phosphating time 2-3min, distilled water conductivity≤30us, bake out temperature 150-170 ℃, drying time 10-15min.
Phosphatization is that metal and phosphoric acid,diluted or phosphate solution are reflected at the protection process that its surface forms phosphate layer; Because phosphating coat and matrix bond that reaction generates are firm, and microcellular structure is arranged, and have the good adsorption performance; Be used as the coating bottom in a large number, and certain antiseptic property is arranged.The phosphatization of aluminium piston can not only improve the adhesive strength of graphite layer and metallic aluminium, also all can play protective action to aluminium and other ferrous metal of inlaying.
The technological process of described skirt section silk-screen printing graphite is: ultrasound oil removing-cleaning-Hot Wash-Cold Wash (distilled water)-oven dry-constant temperature-printed coating-placement-curing; The silk-screen printing technique condition comprises clean time, bake out temperature, drying time, thermostat temperature, piston temperature, ambient temperature, scraper plate pressure, relative moisture, solidifying temperature, curing time.
The process conditions of said piston skirt silk-screen printing graphite are: clean time 2-3min, bake out temperature 150-170 ℃, drying time 10-15min; Thermostat temperature 50-70 ℃; Piston temperature 50-70 ℃, ambient temperature 22-28 ℃, scraper plate pressure 0.8-1MPa; 190 ± 10 ℃ of solidifying temperatures, curing time 50-70min.
The principle of piston skirt silk-screen printing is: the part hole of screen printing forme can see through coating and leak on the printing stock, and the mesh of remaining part need be blocked on the forme, can not on printing stock, form blank through coating.When below printing stock is placed directly in the silk screen that has template, screen print coating passes the mesh in the middle of the silk screen under the extruding of ink scraping blade, be printed onto on the printing stock.One end of the screen printing forme during printing adds coating, and coating can not leak on printing stock through mesh under the effect of no external force voluntarily, and when scraping coating with sdueegee with certain angle of inclination and pressure, coating is transferred on the printing stock under the half tone through half tone.
Said piston head electro-plated pottery processing technological flow is: electrochemical deoiling-Hot Wash-Cold Wash-oven dry-plating pottery processing-Cold Wash-oven dry; Top ceramic treatment process conditions comprise bake out temperature, drying time, electrolyte temperature, plating pottery time, plating pottery voltage, plating pottery current density;
Said piston head electro-plated pottery treatment process condition is: bake out temperature 70-150 ℃, and drying time 10-15min, electrolyte temperature<38 ℃, plating pottery time 35-45min, plating pottery voltage 500-700V, plating pottery current density 20-30A/>dm
2
The electro-plated pottery processing is more specifically: the piston after the shielding processing is put in the middle of the electrolytic solution, and the energising back generates the loose oxide insulating film of one deck immediately in base metal surface.Along with the rising of voltage, electrolytic solution and the parent metal interior voltage of scope of 0.5mm at the interface sharply increase, and cause the near interface field intensity to reach 10
6V/m magnitude oxide film layer and near gas rete are breakdown, can see that many luminous spots that move about are arranged on the piston article surface, micro-arc discharge phenomenon that Here it is. and these differential of the arcs produce also fast and disappear, and the life-span has only 10
-4S-10
-5S, discharge makes the temperature of matrix be increased to 100 ℃-150 ℃, but can reach 6800K-9500K and 10 respectively at the temperature and the pressure of channel interior
2Pa-10
3, measuring the current density that these sparks have is 2.8 * 10
4A/ ㎝
2, can reach the high temperature of 2000K in moment.Forming complete dielectric film is the necessary condition of carrying out the processing of differential arc oxidation.When a certain critical value that applies on the workpiece, some weak link on this layer dielectric film is breakdown, and the micro-arc discharge phenomenon takes place, and is immersed on the workpiece of solution to see numerous acnode of moving about and spark.Therefore puncture the generation of the position a little less than the patina relative thin always, after oxide insulating film is breakdown, form new patina at this position, breakdown spot is transferred to other relative weakness zones, and the therefore final patina that forms is uniform.Because the generation of high temperature makes the reaction that can not take place under the normal temperature become possibility in this zonule, finally forms continuous uniform ceramic layer in base metal surface.This ceramic layer is by γ-Al
2O
3, α-Al
2O
3Form, can obtain higher wear resistance, corrosion resistance, resistance to sudden heating, improve the life-span and the efficient of motor.
The invention has the beneficial effects as follows: the piston solid piston has the good adsorption performance because the phosphating coat that reaction generates has microcellular structure, is used as coating (adhesion) bottom; Certain antiseptic property is arranged, piston crown electro-plated pottery layer, high temperature resistant impact is better; Skirt section silk-screen printing graphite, graphite layer is even, and wear resistance, lubricity obviously improve; The overall performance of piston is improved, and more can adapt to the motor rugged environment.In the production method; The whole phosphating process of piston, piston crown ceramic treatment technology and piston skirt silk-screen printing treatment process major advantage are: the technology easy master is controlled with the realization parameter automatically; Be easy to organize industrialized production, Processing capacity is strong, and manufacturing efficiency is high; Can increase substantially wear-resisting, corrosion-resistant, the high temperature resistance impact property of piston, satisfy the needs under the various bad working environments conditions.After the piston installation that said method is made, 1, mechanical efficiency improves more than 2.5%.2, exhaust emissions CO, HC content obviously descend.3, durability improves, and the overhaul mileage prolongs 50-100%.
Description of drawings:
Fig. 1 is a piston schematic representation of the present invention;
Fig. 2 handles schematic representation for piston skirt of the present invention silk-screen printing;
Fig. 3 is piston crown ceramic treatment shielding frock schematic representation of the present invention;
Among the figure, a. piston skirt, 1. ceramic layer, 2. graphite layer, 3. scraper, 4. graphite, 5. silk screen plate, 6. web plate support, 7. shielding frock.
Embodiment
A kind of internal combustion engine with composite bed, its basic material is the Al-Si alloy, and the whole outer surface of piston has the phosphating coating of thickness 1-3um, and piston skirt a outer surface has the graphite layer 2 of thickness 10-15un, and the piston head outer surface has the ceramic layer 1 of thickness 40-150um.
A kind of internal combustion engine with composite bed, the whole outer surface of piston adopts phosphatization to handle, and the piston skirt adopts silk-screen printing to handle, and piston head adopts the electro-plated pottery processing.
Described phosphatization is handled concrete technological process: electrochemical deoiling-Cold Wash-phosphatization-Cold Wash-distillation washing-oven dry; The process conditions of described phosphatization are: clean time 2-3min, 50-70 ℃ of phosphating solution temperature, phosphating time 2-3min, distilled water conductivity≤30us, bake out temperature 150-170 ℃, drying time 10-15min.
The technology of described piston skirt a silk-screen printing is: ultrasound oil removing-cleaning-Hot Wash-Cold Wash (distilled water)-oven dry-constant temperature-printed coating-placement-curing; End in silk screen version 5 during printing is poured graphite 4 into, scrapes graphite 4 with scraper 3 with certain angle of inclination and pressure, and graphite 4 is transferred to through silk screen version 5 and formed graphite layer 2 on the piston.The process conditions of said piston skirt silk-screen printing graphite are: clean time 2-3min, bake out temperature 150-170 ℃, drying time 10-15min; Thermostat temperature 50-70 ℃; Piston temperature 50-70 ℃, ambient temperature 22-28 ℃, scraper plate pressure 0.8-1MPa; 190 ± 10 ℃ of solidifying temperatures, curing time 50-70min.
The technological process of said piston head ceramic treatment is: electrochemical deoiling-Hot Wash-Cold Wash-oven dry-plating pottery processing-Cold Wash-oven dry; Said piston head ceramic treatment process conditions are: bake out temperature 70-150 ℃, and drying time 10-15min, electrolyte temperature<38 ℃, plating pottery time 35-45min, plating pottery voltage 500-700V, plating pottery current density 20-30A/>dm
2
Be more specifically: the piston after web plate support 6 is handled is put in the middle of the electrolytic solution, and the energising back generates the loose oxide insulating film of one deck immediately in base metal surface.Along with the rising of voltage, electrolytic solution and parent metal at the interface in the scope of 0.5mm voltage sharply increase, can see that many luminous spots that move about are arranged on the piston article surface, be immersed on the workpiece of solution and can see numerous acnode of moving about and spark.Therefore puncture the generation of the position a little less than the patina relative thin always, after oxide insulating film is breakdown, form new patina at this position, breakdown spot is transferred to other relative weakness zones, and the therefore final patina that forms is uniform.Because the generation of high temperature makes the reaction that can not take place under the normal temperature become possibility in this zonule, finally forms continuous uniform ceramic layer in base metal surface.
Claims (7)
1. internal combustion engine with composite bed; Its basic material is the Al-Si alloy; It is characterized in that the whole matrix appearance of piston has the phosphatization processing layer as adhesion layer, piston skirt phosphatization processing layer outer surface has graphite layer, and piston head phosphatization processing layer outer surface has ceramic layer.
2. a kind of internal combustion engine with composite bed as claimed in claim 1 is characterized in that said phosphating coating thickness is 1-3um, said graphite layer thickness 10-15um, said ceramic layer thickness 40-150um.
3. the internal combustion engine production method with composite bed is characterized in that outer surface of piston adopts whole phosphatization to handle earlier, and piston crown adopts the electro-plated pottery processing then, and the silk-screen printing graphite treatment is adopted in the piston skirt.
4. a kind of internal combustion engine production method with composite bed as claimed in claim 3 is characterized in that said phosphatization treatment step comprises: electrochemical deoiling-Cold Wash-phosphatization-Cold Wash-distillation washing-oven dry;
The phosphating process condition comprises: clean time 2-3min, 50-70 ℃ of phosphating solution temperature, phosphating time 2-3min, distilled water conductivity≤30us, bake out temperature 150-170 ℃, drying time 10-15min;
The phosphatization formula of liquid is: in every liter of solvent, add 3-5g zinc nitrate, 4-6g potassium fluoborate, 5-8g potassium fluoride, 1-3ml manganese nitrate.
5. a kind of internal combustion engine production method with composite bed as claimed in claim 3 is characterized in that described skirt section silk-screen printing graphite process step is: ultrasound oil removing-cleaning-Hot Wash, and--------printed coating--placement--solidifies constant temperature in oven dry in Cold Wash.
6. a kind of internal combustion engine production method as claimed in claim 5 with composite bed, it is characterized in that: the process conditions that said process step is controlled comprise: clean time 2-3min, bake out temperature 150-170 ℃; Time 10-15min; Thermostat temperature 50-70 ℃, ambient temperature 22-28 ℃, scraper plate pressure 0.8-1MPa; 190 ± 10 ℃ of solidifying temperatures, curing time 50-70min.
7. a kind of internal combustion engine production method with composite bed as claimed in claim 3 is characterized in that the technological process of said piston head ceramic treatment is: electrochemical deoiling-Hot Wash-Cold Wash-oven dry-plating pottery processing-Cold Wash-oven dry; Said piston head ceramic treatment process conditions are: bake out temperature 70-150 ℃, and drying time 10-15min, electrolyte temperature<38 ℃, plating pottery time 35-45min, plating pottery voltage 500-700V, plating pottery current density 20-30A/>dm
2Contain water glass, NaWO in the said electrolytic solution
4, EDTA disodium, sodium hydroxide four kinds of compositions, wherein NaWO
4Account for 10-15%, the EDTA disodium accounts for 5-15%, and sodium hydroxide accounts for 15-20%, and all the other are water glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101917413A CN102705100A (en) | 2012-06-12 | 2012-06-12 | Internal combustion engine piston provided with composite layer and manufacturing method thereof |
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|---|---|---|---|
| CN2012101917413A CN102705100A (en) | 2012-06-12 | 2012-06-12 | Internal combustion engine piston provided with composite layer and manufacturing method thereof |
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| CN102705100A true CN102705100A (en) | 2012-10-03 |
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| CN2012101917413A Pending CN102705100A (en) | 2012-06-12 | 2012-06-12 | Internal combustion engine piston provided with composite layer and manufacturing method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105313513A (en) * | 2015-10-27 | 2016-02-10 | 山东双港活塞股份有限公司 | Printing method and curing oven for piston skirt carbon fiber coating |
| CN105339531A (en) * | 2014-03-27 | 2016-02-17 | 铃木株式会社 | Surface-coating method for aluminum member, surface-coated aluminum member, and piston for internal combustion engine |
| CN105909418A (en) * | 2016-06-15 | 2016-08-31 | 曲阜金皇活塞股份有限公司 | Composite surface treatment piston and preparation method thereof |
| CN106591919A (en) * | 2016-12-09 | 2017-04-26 | 深圳市新合富力科技有限公司 | Aluminum material surface nanometer treatment process |
| CN106762199A (en) * | 2016-12-09 | 2017-05-31 | 东风活塞轴瓦有限公司 | A kind of engine piston duplex anti-friction coating |
| US10179956B2 (en) | 2014-03-27 | 2019-01-15 | Suzuki Motor Corporation | Anodic oxide coating, treatment method therefor, and piston for internal combustion engine |
| CN109605968A (en) * | 2018-11-02 | 2019-04-12 | 成都银河动力有限公司 | A kind of technique improving aluminum piston graphite silk-screen printing coating layer thickness |
| US10458034B2 (en) | 2014-03-27 | 2019-10-29 | Suzuki Motor Corporation | Anodizing treatment method and structure of internal combustion engine |
| CN111379642A (en) * | 2018-12-29 | 2020-07-07 | 中内凯思汽车新动力系统有限公司 | Repairing process of nano coating on surface of piston and repaired piston |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105339531A (en) * | 2014-03-27 | 2016-02-17 | 铃木株式会社 | Surface-coating method for aluminum member, surface-coated aluminum member, and piston for internal combustion engine |
| US10179956B2 (en) | 2014-03-27 | 2019-01-15 | Suzuki Motor Corporation | Anodic oxide coating, treatment method therefor, and piston for internal combustion engine |
| US10458034B2 (en) | 2014-03-27 | 2019-10-29 | Suzuki Motor Corporation | Anodizing treatment method and structure of internal combustion engine |
| CN105313513A (en) * | 2015-10-27 | 2016-02-10 | 山东双港活塞股份有限公司 | Printing method and curing oven for piston skirt carbon fiber coating |
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| CN105909418A (en) * | 2016-06-15 | 2016-08-31 | 曲阜金皇活塞股份有限公司 | Composite surface treatment piston and preparation method thereof |
| CN106591919A (en) * | 2016-12-09 | 2017-04-26 | 深圳市新合富力科技有限公司 | Aluminum material surface nanometer treatment process |
| CN106762199A (en) * | 2016-12-09 | 2017-05-31 | 东风活塞轴瓦有限公司 | A kind of engine piston duplex anti-friction coating |
| CN109605968A (en) * | 2018-11-02 | 2019-04-12 | 成都银河动力有限公司 | A kind of technique improving aluminum piston graphite silk-screen printing coating layer thickness |
| CN109605968B (en) * | 2018-11-02 | 2020-11-27 | 成都银河动力有限公司 | Process for improving thickness of graphite screen printing coating of aluminum piston |
| CN111379642A (en) * | 2018-12-29 | 2020-07-07 | 中内凯思汽车新动力系统有限公司 | Repairing process of nano coating on surface of piston and repaired piston |
| CN111379642B (en) * | 2018-12-29 | 2021-09-21 | 中内凯思汽车新动力系统有限公司 | Repairing process of nano coating on surface of piston and repaired piston |
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Application publication date: 20121003 |