CN105041503A - Diamond-like coating piston ring with long service life - Google Patents
Diamond-like coating piston ring with long service life Download PDFInfo
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- CN105041503A CN105041503A CN201510371801.3A CN201510371801A CN105041503A CN 105041503 A CN105041503 A CN 105041503A CN 201510371801 A CN201510371801 A CN 201510371801A CN 105041503 A CN105041503 A CN 105041503A
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- diamond
- coating
- piston ring
- tungsten
- chromium metal
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- Chemical Vapour Deposition (AREA)
Abstract
The invention discloses a diamond-like coating piston ring with a long service life. The diamond-like coating piston ring is manufactured in the steps that a thin chromium layer is deposited on an outer circle of a base body of the piston ring; then, a diamond-like layer containing tungsten and chromium metal is deposited on an outer circle of the thin chromium layer; finally, a pure diamond-like coating is deposited on the surface of an outer circle of the diamond-like layer doped with tungsten and chromium metal. The inner stress of the diamond-like coating is greatly lowered by adding tungsten and chromium metal into a middle layer, and bonding force of the coating is increased; the diamond-like coating of the piston ring can be thicker, and the service life of the piston ring is greatly prolonged.
Description
One, technical field:
The present invention relates to a kind of piston ring, be specifically related to the diamond-like coating piston ring of a kind of long life, belong to piston ring surface processing technology field.
Two, background technique:
Along with more and more stricter to the requirement of automobile fuel ecomomy index and reliability index, the frictional work loss how reducing motor car engine and the working life of improving motor are the important topics that current motor producer is studied.Piston ring is the core component of motor, its working method is realized by the sliding friction between piston ring and cylinder inner wall, to have in the course of the work a large amount of frictional work loss and piston ring working surface very easily wear and tear, so need to reduce the frictional loss of piston ring and the cylindrical wear extent of piston ring as far as possible.
Diamond-like coating has the feature such as high abrasion, low coefficient of friction, if accomplish in the surface treatment of piston ring by diamond-like coating, effectively will reduce the frictional work loss of piston ring and greatly improve the wear resistance of piston ring.But diamond-like coating possesses larger internal stress, the thicker internal stress of coating is larger, the combination force of coating will be affected, so diamond-like coating cannot do thick under normal circumstances, generally can only control within 3 μm, the endurance quality of the too thin piston ring of coating is affected, and cannot realize the long life.
Three, summary of the invention:
The object of the invention is to solve diamond-like coating internal stress and cannot do thick problem greatly, a kind of high-performance piston ring possessing long life and low coefficient of friction is provided.
In order to solve the problem, diamond-like coating piston ring of the present invention comprises piston ring substrate, and on the periphery of matrix, be provided with the ultra-thin layers of chrome of one deck, be provided with the diamond-like rock layers that one deck mixes tungsten and chromium metal in the outside of ultra-thin layers of chrome again, be finally provided with pure diamond-like coating at the cylindrical of the diamond-like rock layers of mixing tungsten and chromium metal.Be characterized in: the thin layers of chrome thickness range of innermost transition: 0.5 ~ 1 μm, hardness range: 700 ~ 1200HV; The thickness range of the diamond-like rock layers of tungsten and chromium metal is mixed in mesosphere: 2 ~ 5 μm, hardness range: 1800 ~ 2200HV; Outmost pure diamond-like coating thickness range: 3 ~ 6 μm, hardness range: 2500 ~ 3300HV.Thin layers of chrome is bond coat, its objective is to activate piston ring basic surface raising layer base combination force; Mesosphere is the diamond-like rock layers of mixing tungsten and chromium metal, namely in diamond-like coating deposition process, mix tungsten and chromium metal simultaneously, its objective is the internal stress that effectively can reduce diamond-like coating by mixing tungsten and chromium metal in diamond-like coating, diamond-like coating can be accomplished thicker; The diamond-like coating of outermost disc is that hardness is high, the better pure diamond-like coating of wear resistance.Total is is piston ring substrate from inside to outside successively, thin layers of chrome, the diamond-like rock layers of mixing tungsten and chromium metal and pure diamond-like rock layers, and hardness raises the associativity forming hardness gradient distribution and be more conducive to Bulk coat gradually from inside to outside.
Coating structure of the present invention efficiently solves diamond-like coating stress can not do thick problem greatly, thus achieves the piston ring possessing and grow durable and low coefficient of friction.
Compound diamond-like coating in the present invention is that the mode by adopting physical vapor deposition and chemical vapor deposition to combine is formed.
Four, accompanying drawing explanation
Fig. 1 is schematic cross-section of the present invention.
Five, embodiment
See Fig. 1, comprise piston ring substrate 1, thin layers of chrome 2 on matrix 1 periphery, then the diamond-like rock layers 3 of mixing tungsten and chromium metal is provided with on the periphery of thin layers of chrome 2, and the pure diamond-like rock layers 4 on the periphery of diamond-like rock layers 3 mixing tungsten and chromium metal.
First physical vapor deposition mode is utilized first to deposit the thin layers of chrome of one deck at piston ring surface, the mode that recycling physical vapor deposition and chemical vapor deposition combine deposits the diamond-like rock layers that one deck mixes tungsten and chromium metal simultaneously, deposits the pure diamond-like coating of one deck utilizing chemical vapor deposition mode.Whole coating bond is good, excellent performance, meets the performance that piston ring possesses long lifetime and low friction.
Claims (1)
1. a long life diamond-like coating piston ring, formed by the mode utilizing physical vapor deposition and chemical vapor deposition to combine, comprise piston ring substrate (1), the thin layers of chrome (2) of matrix (1) periphery, the diamond-like rock layers (3) of mixing tungsten and chromium metal of thin layers of chrome (2) periphery and mixing the pure diamond-like coating (4) of diamond-like rock layers (3) periphery of tungsten and chromium metal, it is characterized in that: thin layers of chrome (2) thickness range: 0.5 ~ 1 μm, hardness range: 700 ~ 1200HV, mix diamond-like rock layers (3) thickness range of tungsten and chromium metal: 2 ~ 5 μm, hardness range: 1800 ~ 2200HV, pure diamond-like coating (4) thickness range: 3 ~ 6 μm, hardness range: 2500 ~ 3300HV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510371801.3A CN105041503A (en) | 2015-06-25 | 2015-06-25 | Diamond-like coating piston ring with long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510371801.3A CN105041503A (en) | 2015-06-25 | 2015-06-25 | Diamond-like coating piston ring with long service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105041503A true CN105041503A (en) | 2015-11-11 |
Family
ID=54448397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510371801.3A Pending CN105041503A (en) | 2015-06-25 | 2015-06-25 | Diamond-like coating piston ring with long service life |
Country Status (1)
| Country | Link |
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| CN (1) | CN105041503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059003A (en) * | 2017-03-23 | 2017-08-18 | 南京飞燕活塞环股份有限公司 | A kind of method for reducing fretting wear between piston ring and cylinder sleeve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101208461A (en) * | 2005-05-26 | 2008-06-25 | 贝卡尔特股份有限公司 | Piston ring having hard multi-layer coating |
| CN102650053A (en) * | 2012-04-25 | 2012-08-29 | 上海交通大学 | Manufacturing method for CVD (Chemical Vapor Deposition) diamond/diamond-like composite coating tool with complex shape |
| CN204493002U (en) * | 2015-03-04 | 2015-07-22 | 安庆帝伯格茨活塞环有限公司 | The diamond-like coating piston ring of a kind of long life |
-
2015
- 2015-06-25 CN CN201510371801.3A patent/CN105041503A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101208461A (en) * | 2005-05-26 | 2008-06-25 | 贝卡尔特股份有限公司 | Piston ring having hard multi-layer coating |
| CN102650053A (en) * | 2012-04-25 | 2012-08-29 | 上海交通大学 | Manufacturing method for CVD (Chemical Vapor Deposition) diamond/diamond-like composite coating tool with complex shape |
| CN204493002U (en) * | 2015-03-04 | 2015-07-22 | 安庆帝伯格茨活塞环有限公司 | The diamond-like coating piston ring of a kind of long life |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059003A (en) * | 2017-03-23 | 2017-08-18 | 南京飞燕活塞环股份有限公司 | A kind of method for reducing fretting wear between piston ring and cylinder sleeve |
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Application publication date: 20151111 |
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| WD01 | Invention patent application deemed withdrawn after publication |