CN202768159U - Diamond-like coating piston - Google Patents
Diamond-like coating piston Download PDFInfo
- Publication number
- CN202768159U CN202768159U CN 201220465710 CN201220465710U CN202768159U CN 202768159 U CN202768159 U CN 202768159U CN 201220465710 CN201220465710 CN 201220465710 CN 201220465710 U CN201220465710 U CN 201220465710U CN 202768159 U CN202768159 U CN 202768159U
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- Prior art keywords
- piston
- coating
- diamond
- hardness
- piston head
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a diamond-like coating piston which comprises a piston head with an annular groove where a piston rind is installed. A layer of metastable state amorphous carbon diamond-like coating (DLC) coating with the thickness of 5-50mum is evenly coated around the piston head and in the annular groove. The size of the piston ring groove after the coating is coated corresponds to that of the assembled piston ring. The hardness of the coating is 900-2000HV, and the friction coefficient is below 0.1. The diamond-like coating piston enables the metastable state amorphous carbon DLC coating to be coated on the surface of the piston head, greatly improves the hardness of the surface of the piston head, prolongs service life and reduces cost.
Description
Technical field
The utility model relates to a kind of piston of internal-combustion engine.
Background technique
Piston is called as the heart of motor.It is one of most important part in the motor.Its function is to bear gas pressure, and orders about crankshaft rotating by the wrist pin drive link.When engine operation, piston directly reaches 2200 degrees centigrade high-temperature gas with transient temperature and contacts, and its head temperature reaches 300 ℃～400 ℃, and temperature distributing disproportionation spares, and piston head is bearing very large gas pressure when working stroke.Therefore require that the piston thermal conductivity is good, thermal expansion coefficient is little, and have enough hot strengths, wear-resisting and corrosion resisting property, dimensional stability also will be got well.Also should have in addition easy manufacturing, characteristics with low cost.In the industry of production and application piston, generally all piston crown is carried out surface treatment.When assembling, piston also to assemble a cast iron ring carrier in the annular groove at piston.The mode that surface treatment is adopted mainly is anodizing, differential arc oxidation processing, laser process, composite material processing etc.Along with the development of automobile industry, require motor to possess larger power, higher moment of torsion, higher output, higher temperature and the pressure of explosion of Geng Gao.Common anodizing can not satisfy these higher demands gradually at present, because the oxide layer hardness of anodizing is low, wears no resistance; Oxide layer hardness is inhomogeneous, and friction factor is large, and surface roughness is low, and appearance poor is very fast to piston ring scuffing; Anodised corrosion-resistant, and cost is high.
The model utility content
The utility model technical issues that need to address provide and a kind ofly can reduce the piston cost, prolong the piston engine piston that class hard rock coating is arranged in working life.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is:
A kind of piston of diamond-like coating, comprise the piston head with the annular groove of ring installation, the attached a layer thickness of plating is the metastable state amorphous carbon DLC coating of 5～50um around piston head and in the annular groove, and the size of described annular groove after the attached coating of plating is corresponding with the piston ring that assembles.
Further improvement of the utility model is: the hardness of described coating is at 900～2000 HV, and friction factor is below 0.1.
Further improvement of the utility model is: the thickness of described coating is 20～40um.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
The utility model is attached to the piston crown surface with metastable state amorphous carbon DLC coating plating, has greatly improved the hardness on piston crown surface, can prolong piston working life, reduces user's user cost.
Metastable state amorphous carbon DLC coating is the coating of a kind pottery, and the DLC coating contains the brilliant carbon film of non-inferior stable state of a large amount of SP3 keys, and mainly with SP3 and the combination of SP2 hybrid bond, its performance is close to diamond between carbon atom.Because the DLC coating hardness is high, 2～3 times of anodizing hardness, 8～10 times of abrasion-proof inserted ring hardness, it is 4～6 times that steel top piston is processed hardness, add extremely low friction factor, can guarantee the performances such as the high wear resistance, heat resistance of piston, corrosion-resistant, low coefficient of friction, reduced the wearing and tearing to piston ring groove, improve the polishing machine of piston ring groove, greatly prolonged the working life of piston.And can save cast iron ring carrier, low processing cost has not only reduced user's user cost, and has reduced the cost of production of manufacturer.
Description of drawings
Fig. 1 is partial section of the present utility model;
Fig. 2 is that the utility model external surface coating amplifies 500 times structural drawing.
Wherein, 1, piston head, 2, coating.
Embodiment
Fig. 1 is the partial section at piston crown piston ring groove of the present utility model place.The annular groove of the ring installation of piston head 1 of the present utility model is machined directly to the close size of size that matches with piston ring when machining piston, then adopting the composite chemical electro-plating method to plate attached one deck metastable state amorphous carbon DLC coating 2 around the piston head 1 and in the annular groove, the thickness of coating 2 is 5～50um, makes the size of piston ring groove after the attached coating of plating corresponding with the piston ring that assembles.And the hardness that makes coating 2 is at 900～2000 HV, and friction factor is below 0.1.The microstructure of the coating of piston head outer surface of the present utility model has good metallographic structure and performance as shown in Figure 2.
The thickness of coating of the present utility model can be adjusted according to model or the size of piston, generally speaking, when coating thickness is 20～40um, goes for all internal combustion engines.
Claims (3)
1. the piston of a diamond-like coating, comprise the piston head (1) with the annular groove of ring installation, it is characterized in that: reach on every side in the annular groove uniformly at piston head (1) that the attached a layer thickness of plating is the metastable state amorphous carbon DLC coating (2) of 5～50um, the size of described piston ring groove after the attached coating of plating is corresponding with the piston ring that assembles.
2. the piston of a kind of diamond-like coating according to claim 1 is characterized in that the hardness of described coating (2) at 900～2000 HV, and friction factor is below 0.1.
3. the piston of a kind of diamond-like coating according to claim 2, the thickness that it is characterized in that described coating (2) is 20～40um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220465710 CN202768159U (en) | 2012-09-13 | 2012-09-13 | Diamond-like coating piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220465710 CN202768159U (en) | 2012-09-13 | 2012-09-13 | Diamond-like coating piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202768159U true CN202768159U (en) | 2013-03-06 |
Family
ID=47774741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220465710 Expired - Fee Related CN202768159U (en) | 2012-09-13 | 2012-09-13 | Diamond-like coating piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202768159U (en) |
-
2012
- 2012-09-13 CN CN 201220465710 patent/CN202768159U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20210913 |