CN2911211Y - Surface treated I.C.engine piston - Google Patents
Surface treated I.C.engine piston Download PDFInfo
- Publication number
- CN2911211Y CN2911211Y CN 200620084239 CN200620084239U CN2911211Y CN 2911211 Y CN2911211 Y CN 2911211Y CN 200620084239 CN200620084239 CN 200620084239 CN 200620084239 U CN200620084239 U CN 200620084239U CN 2911211 Y CN2911211 Y CN 2911211Y
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- piston
- mos
- thickness
- combustion engine
- skirt
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- Expired - Lifetime
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- Coating By Spraying Or Casting (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to an internal-combustion engine piston, concretely speaking, and a sort of surface treatment internal - combustion engine piston. With the body founded by aluminum alloy, the piston's working face contains the top part and skirt part, characterized by a ceramic layer normally controlled to 0.08-0.15mm by thickness on the top and a MoS2 spay coating layer controlled to 0.01-0.03mm on the skirt. The producing method of the piston includes of micro-arc oxidation technique used on the top and the producing method of MoS2 spay coating layer on the skirt part. Great improvement in the colligated capability like anti-high temperature, anti-causticity, wear-ability and so on will satisfy any kind of need under vile running condition.
Description
Technical field
The utility model relates to an internal combustion engine, relates more specifically to a kind of surface-treated internal combustion engine.
Background technique
Internal combustion engine requires the operating temperature height, and thermal shock is big, and the high friction of speed is frequent, and pot type piston (simple cast aluminium or aluminum alloy material) is difficult to satisfy under the operating mode harsh conditions works, and is restricting the raising of motor combination property for a long time.Scientific and technical personnel have implemented various behaves both at home and abroad for this reason: as: " anodization ", " plasma gas-phase deposit ceramic treatment ", " the spraying teflon is handled " etc., serious hope can solve above difficult point, but the result is one-side solution difficult point, does not solve above-mentioned difficult point on the whole.
The plasma micro-arc oxidation is a kind of direct new technology at aluminum alloy surface growth in situ ceramic layer.It is to grow up on anodised basis the nearly more than ten years, but both mechanism, technology and many differences are all arranged in nature.The piston head differential arc oxidation is that piston head is placed electrolyte aqueous solution, utilize electrochemical method in the surface micropore of this material, to produce the spot of sparkover, under thermochemistry, under plasma chemistry and the electrochemical acting in conjunction, generate the method for ceramic membrane.The piston sample is put into electrolyte aqueous solution, after the energising, the surface generates very thin layer oxide film immediately, when the voltage that applies on the sample surpasses a certain critical value, some weak link on this layer dielectric film is breakdown, the micro-arc discharge phenomenon takes place, and is immersed in and can sees numerous acnode of moving about and spark on the sample surfaces in the solution.Position a little less than the patina relative thin takes place because always puncture, and after oxide insulating film is breakdown, generates new patina at this position, and breakdown spot is transferred to the weak zone of other relative thin, and the final patina that forms is uniform.This patina 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.
Micro-arc oxidation device mainly contains power supply and voltage control system, electrolytic bath, stirring system cooling system four parts are formed.Power supply and voltage control system provide differential arc oxidation required high-tension electricity, and electrolytic bath is made by stainless steel usually, the double negative electrode of doing, interior Sheng differential arc oxidation electrolyte aqueous solution; Stirring system can improve electrolytical uniformity in the solution; The circulatory system can guarantee the relatively stable of electrolytic solution.
At present, Russia preponderates on research scale and level, China is introducing on the basis that absorbs Russian technology, begin now with wear-resisting, high temperature resistant impact, the form of corrosion-resistant finishes is moved towards operational phase, domestic research also is successfully applied to the unit of use and few, mainly contain comparatively system of Institute of Low Energy Nuclear Physics, Beijing Normal University's research work in this respect, they are to the appearance structure of the preparation process of Micro-Arc Oxidized Ceramic Layer of Aluminum Alloy, energy interchange, film and use and all inquire into.Harbin Huanya Micro Arc Technology Co., Ltd turns to pilot run the existing experimental stage, and has built up a semi-automatic production line.This technology case report as yet of being successfully applied to piston head up to now.
Molybdenum disulfide (MoS
2) coating is a kind of oiling agent of high-quality, have advantages such as friction factor little (about 0.05) anti-attrition is good, it can improve piston skirt spraying molybdenum disulfide the break-in situation and reduce the scuffing of cylinder bore fault, and the wear resistance that can make cylinder sleeve improves 1-2 doubly, the raising of the The friction coefficient of molybdenum disulfide coating load and progressively reducing in addition, and good film-forming property.Therefore, piston head arc differential oxide ceramic layer, skirt section spraying MoS
2Application will improve the combination property of motor greatly, use has a extensive future.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming that existing piston technology exists, integrated utilization differential arc oxidation treatment technology, MoS
2Spraying technology is handled piston, so that the combination properties such as high temperature resistant impact, corrosion resistance and wear resistance of piston are greatly improved.
The utility model is achieved by the following scheme: a kind of surface-treated piston for internal combustion engine, and its matrix is formed by aluminium alloy casting, and working surface comprises top, skirt section, and it is characterized in that has a ceramic layer on the top surface of piston matrix, and there is a MoS in the skirt section
2Sprayfused coating.
For satisfying the combination property requirement of piston, the thickness of generally controlling ceramic layer is at 0.08-0.15mm; MoS
2The thickness 0.01-0.03mm of sprayfused coating.
A kind of manufacture method of surface treatment surface-treated piston for internal combustion engine comprises piston head ceramic layer and piston skirt MoS
2The manufacture method of sprayfused coating, ceramic layer adopts micro-arc oxidation process, and the pH value 9-13 of oxidation liquid uses deionized water, and is provided with constand current, constand voltage control gear and oxidation liquid heat exchange temperature controlling device; MoS
2The manufacturing technology steps of sprayfused coating may further comprise the steps: the baking-secondary baking of piston face cleaning-preheating-spraying-once.
More specifically, ceramal layer micro-arc oxidation process: voltage is at 600-800V, and electric current is at 10-25A/dm
2, the oxidation liquid temp is at 20-60 ℃.Form and increase thickness along with the prolongation ceramic coating layer of oxidization time is also continuous thereupon, oxidization time is long more, the consistency of ceramic film is high more, but the roughness on surface also increases thereupon, generally speaking, the differential arc oxidation time should require thicknesses of layers to decide according to operation technique, generally all is controlled in 20-50 minute scope, can obtain high hardness, high shock-resistant, highly corrosion resistant ceramic film that the differential arc oxidation aluminum alloy surface generates.
The micro-arc oxidation process of optimizing: voltage is at 600-650V, and electric current is at 15-20A/dm
2, the oxidation liquid temp is at 20-60 ℃, oxidization time 25-35 minute.
MoS
2The manufacturing process of sprayfused coating: by pretreatment, adjust its prescription and additive, spraying temperature, stoving time wait the quality that improves and strengthen the curing molybdenum layer.The all-aluminium piston of completion of processing; dirts such as scouring is deoiled, dirt; be preheating to about 120-140 ℃ after cleaning with the vapour degreasion of tetrachloroethylene or trichloroethylene, the position that annular groove, pin-and-hole etc. need not sprayed Xu protects and is placed on spray Xu Jishang, with spray gun with MoS
2Be sprayed onto on the piston skirt.Coating thickness is 0.01-0.03mm.Mos
2The spray coating liquor prescription is: contain 2-5g boric acid, 8-12g lead fluorosilicate [Pb[siF6] in every 100ML solvent
2And 5-10g/Mos
2The adding of prescription mesoboric acid and lead fluorosilicate can make MoS
2Powder keeps the evenly outstanding turbid state of tucking in, and not only makes the thickness homogeneous of spraying, and can significantly improve its adhesive strength.During spraying, piston temperature remains on about 100-140 ℃, decides film quality by temperature control, and temperature is too high, and thickness easily surpasses, and temperature is low excessively, molybdenum disulfide imperfect bonding, and uneven thickness.Will toast after the spraying, roasting temperature and time control have determined the bonding quality of molybdenum disulfide.General baking at twice, one time roasting temperature 130-140 ℃, endurance 25-30 minute, take out and wipe the superfluous powder in surface, carry out secondary baking then, continue 25-35 minute down at 125-135 ℃, make MOS
2Powder bonds fully.
The piston of said method manufacturing is shock-resistant, corrosion-resistant, wear-resisting property improves greatly, and the installation back is compared with the common aluminum alloy piston: 1. moment of torsion improves 4Nm, power improves more than the 2Kw; 2. durability improves, and the overhaul mileage prolongs 50%-100%; 3. mechanical efficiency improves more than 2%; 4. exhaust emissions CO, HC content obviously descend.
In the method for making piston of the present utility model, piston head arc differential oxide ceramic layer technology and skirt section spraying molybdenum disulfide technology major advantage are that technology is grasped easily and the realization parameter is controlled automatically, be easy to organize industrialized production, occupation area of equipment is little, Processing capacity is strong, the manufacturing efficiency height is not reducing material γ-Al
2O
3, α-Al
2O
3The ceramic membrane value reaches and does not change under the condition of the former physical dimension of alloy workpiece, surface roughness, can increase substantially wear-resisting, corrosion-resistant, the high temperature resistance impact property of piston, satisfies the needs under the various bad working environments conditions.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure, 1. piston head, 2. ceramal layer, 3. skirt section, 4.MOS
2Sprayfused coating, 5. piston matrix,
Embodiment
A kind of surface-treated piston for internal combustion engine has a ceramic layer (2) on the top surface of piston matrix (5), thickness is 0.08-0.15 mm, and skirt section (3) have a MoS
2Sprayfused coating, thickness are 0.01-0.03mm.
The manufacture method of above-mentioned surface-treated piston for internal combustion engine comprises piston head ceramic layer (2) and piston skirt (3) MoS
2The manufacture method of sprayfused coating, the ceramal layer adopts micro-arc oxidation process, and the pH value 9-13 of oxidation liquid uses deionized water, and is provided with constand current, constand voltage control gear and oxidation liquid heat exchange temperature controlling device, and voltage is at 600-650V, and electric current is at 15-20A/dm
2, the oxidation liquid temp is at 20-60 ℃, oxidization time 30 minutes; MoS
2The manufacturing technology steps of sprayfused coating may further comprise the steps: piston face cleans, and----secondary baking--is once toasted--in spraying in preheating.The aluminium piston matrix (5) of completion of processing; dirts such as scouring is deoiled, dirt; carry out preheating (about 120-140 ℃) after cleaning with the vapour degreasion of tetrachloroethylene or trichloroethylene, the position that annular groove, pin-and-hole etc. need not sprayed Xu protects and is placed on spray Xu Jishang, with spray gun with Mos
2Be sprayed onto on the piston skirt (3).Coating thickness is 0.01-0.03mm.MoS
2The spray coating liquor prescription is: add 2-5g boric acid, 8-12g lead fluorosilicate [Pb[siF6] in every 100ML solvent
2And 5-10g/MoS
2:.The adding of prescription mesoboric acid and lead fluorosilicate can make MoS
2Powder keeps the evenly outstanding turbid state of tucking in, and not only makes the thickness homogeneous of spraying, and can significantly improve its adhesive strength.During spraying, piston temperature remains on about 100-140 ℃, decides film quality by temperature control, and temperature is too high, and thickness easily surpasses, and temperature is low excessively, molybdenum disulfide imperfect bonding, and uneven thickness.Will toast after the spraying, roasting temperature and time control have determined the bonding quality of molybdenum disulfide.
Calculate the piston head surface area, in thermostatic chamber, measure piston head thickness and skirt section molded lines size, cleaning piston surface, preferred every process parameter, prepare suitable oxidation liquid composition and component, start electrolytic solution cooling and stirring system, voltage is risen to 500V, initial current is at 10-15A/dm
2This value is with oxidation film layer thickness, oxidization time changes and changes, notice that the control ceramic film generates the best formation speed of initial time, create conditions for patina turns to growth inside, the control of differential arc oxidation electric current, voltage, the control of oxidization time are the keys that improves the piston head ceramic layer thickness.The differential arc oxidation Control of Voltage changes in the 600-650 scope, and oxidation current is controlled at 10-15A/dm
2Change in the scope, the oxidation liquid temp is controlled at the part surface that variation is immersed in the oxidation liquid in the 20-60 ℃ of scope and applies down in higher voltage, make the initial one deck rete that generates in its surface, when the insulating oxide part breakdown, produce minute-pressure plasma arc light discharge, under the high density energy effect of plasma micro-arc discharge generation, piston head surface forms TRANSIENT HIGH TEMPERATURE, the high pressure differential of the arc with oxide side, patina and interface layer materials such as oxidation liquid be melted and form γ-Al
2O
3, α-Al
2O
3Ceramic membrane.Oxidization time is according to the technical matters parameter request, and ceramic layer thickness determines that oxidization time is 30 minutes.The current efficiency of the growing process by optimizing differential arc oxidation film layer and the process parameter of differential arc oxidation amount of time finally obtain the corrosion-resistant of optimal economic thickness, high temperature resistant impact ceramic layer
According to the skirt section technical requirements, optimizing technology parameters and solution ratio, piston temperature is controlled at about 125 ℃ during spraying, and temperature is too high, and thickness easily surpasses; Temperature is low excessively, molybdenum disulfide imperfect bonding, and uneven thickness.To toast after the spraying, for the first time about 140 ℃ about baking 30min, to improve the adhesion strength of molybdenum disulfide; Superfluous molybdenum disulfide powder is wiped with soft cotton yarn in the baking back for the first time, toasting about 30min about 130 ℃, it is bondd fully again.
Claims (2)
1. surface-treated piston for internal combustion engine, its matrix is formed by aluminium alloy casting, and working surface comprises top, skirt section, and it is characterized in that has a ceramic layer on the top surface of piston matrix, and there is a MoS in the skirt section
2Sprayfused coating.
2. surface-treated piston for internal combustion engine as claimed in claim 1 is characterized in that the thickness 0.08-0.15mm of ceramic layer; MoS
2The thickness 0.01-0.03mm of sprayfused coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084239 CN2911211Y (en) | 2006-05-15 | 2006-05-15 | Surface treated I.C.engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084239 CN2911211Y (en) | 2006-05-15 | 2006-05-15 | Surface treated I.C.engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2911211Y true CN2911211Y (en) | 2007-06-13 |
Family
ID=38133071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620084239 Expired - Lifetime CN2911211Y (en) | 2006-05-15 | 2006-05-15 | Surface treated I.C.engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2911211Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453789C (en) * | 2006-05-15 | 2009-01-21 | 曲阜金皇活塞股份有限公司 | Surface-treated piston for internal combustion engine, and its preparing method |
| CN101943079A (en) * | 2010-09-05 | 2011-01-12 | 曲阜金皇活塞股份有限公司 | Hard-head anodized internal combustion engine piston and manufacturing method thereof |
| CN102705100A (en) * | 2012-06-12 | 2012-10-03 | 曲阜金皇活塞股份有限公司 | Internal combustion engine piston provided with composite layer and manufacturing method thereof |
| CN103080386A (en) * | 2010-08-25 | 2013-05-01 | 丰田自动车株式会社 | Internal combustion engine and method of producing same |
| CN103256141A (en) * | 2012-02-15 | 2013-08-21 | 日立汽车系统株式会社 | Method of producing piston of internal combustion engine |
-
2006
- 2006-05-15 CN CN 200620084239 patent/CN2911211Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453789C (en) * | 2006-05-15 | 2009-01-21 | 曲阜金皇活塞股份有限公司 | Surface-treated piston for internal combustion engine, and its preparing method |
| CN103080386A (en) * | 2010-08-25 | 2013-05-01 | 丰田自动车株式会社 | Internal combustion engine and method of producing same |
| CN103080386B (en) * | 2010-08-25 | 2015-07-08 | 丰田自动车株式会社 | Internal combustion engine and method of producing same |
| CN101943079A (en) * | 2010-09-05 | 2011-01-12 | 曲阜金皇活塞股份有限公司 | Hard-head anodized internal combustion engine piston and manufacturing method thereof |
| CN103256141A (en) * | 2012-02-15 | 2013-08-21 | 日立汽车系统株式会社 | Method of producing piston of internal combustion engine |
| CN103256141B (en) * | 2012-02-15 | 2016-09-28 | 日立汽车系统株式会社 | The manufacture method of internal combustion engine |
| CN102705100A (en) * | 2012-06-12 | 2012-10-03 | 曲阜金皇活塞股份有限公司 | Internal combustion engine piston provided with composite layer and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070613 |
|
| EXPY | Termination of patent right or utility model |