CN103484834A - Production process of DLC (Diamond Like Carbon) composite coating cylinder liner - Google Patents
Production process of DLC (Diamond Like Carbon) composite coating cylinder liner Download PDFInfo
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- CN103484834A CN103484834A CN201310391532.8A CN201310391532A CN103484834A CN 103484834 A CN103484834 A CN 103484834A CN 201310391532 A CN201310391532 A CN 201310391532A CN 103484834 A CN103484834 A CN 103484834A
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Abstract
The invention discloses a production process of a DLC (Diamond Like Carbon) composite coating cylinder liner. The production process sequentially comprises the steps of (1) placing a workpiece into an airtight chamber, and vacuumizing the airtight chamber; (2) filling an Ar gas into the airtight chamber, and loading 4KV pulsed negative bias on the workpiece, wherein the surface of the workpiece continuously releases electrons outwards, and the Ar with positive electricity impacts the surface at an accelerated speed under the attraction of the workpiece to realize the plasma cleaning for the surface of the workpiece; (3) filling a trimethylsilane gas into the airtight chamber, and firstly forming a Si-C transition layer on the inner surface of the workpiece; (4) introducing a hydrocarbon gas into the airtight chamber to form a DLC coating on the inner surface of the workpiece. The production process is easy and feasible, and by applying vapor deposition for coating a film on the inner surface of the cylinder liner, the abrasion resistance and cavitation resistance of the cylinder liner can be improved. The production process can be applied to the inner surface of the cylinder liner, and also can be applied to a water channel part in the outer surface of a wet cylinder liner, thus fully meeting the requirements of a modern engine, and having a broad application prospect.
Description
Technical field
The invention belongs to the cylinder sleeve production technical field, particularly a kind of DLC compound coating cylinder sleeve production technique.
Background technology
Cylinder sleeve is one of important core part of engine, and in " heart " position of engine, cylinder sleeve and piston, cylinder head form airtight cylinder operation space jointly.In the operational process of cylinder sleeve, with piston ring, rub, phenomenon easily occurs early to grind, and cylinder sleeve is after long-play, cavitation erosion easily occurs, although can, by changing the method for material, improve wear resistance and solidity to corrosion at present, but very limited, still can't meet the requirement of engine superpower and maximum discharge.
Summary of the invention
The present invention, in order to solve weak point of the prior art, provides a kind of cylinder sleeve wear resistance and corrosion resistant DLC compound coating cylinder sleeve production technique of improving.
For achieving the above object, the present invention proposes following technical scheme: DLC compound coating cylinder sleeve production technique comprises the following steps successively:
(1), workpiece is put into to confined chamber, confined chamber is vacuumized, make the air pressure in confined chamber reach 14 millitorrs;
(2), in confined chamber, be filled with Ar gas, and load the pulsed negative bias of 4KV on workpiece, because workpiece surface is negative electrode, workpiece surface constantly outwards discharges electronics, electronics and Ar atom bump and make its ionization, and at this moment whole confined chamber inside all has been full of built-in cathode tube discharge plasma, Ar positively charged, bombarded surface is accelerated in the attraction that is subject to workpiece, realizes the plasma clean workpiece surface;
(3), in confined chamber, be filled with trimethyl silane gas, first form the Si-C transition layer of 2um at work piece inner surface;
(4), in confined chamber, pass into hydrocarbon gas, just can form the DLC coating at work piece inner surface, the DLC coat-thickness is 3.5-5um, and this DLC coating is the pure carbon film of ta-C or film a-C:H:X.
Hydrocarbon gas in described step (4) is acetylene or methane.
X in described step (4) is metallic element or non-metallic element.
Described non-metallic element is Si, O or N element.
" DLC " is the abbreviation of English " DIAMOND-LIKE CARBON " (diamond-like carbon film-coating).DLC be a kind of by carbon form, similar with diamond in nature, there is again the material that the graphite atom forms structure simultaneously.DLC is a kind of noncrystalline membrane, owing to thering is high rigidity and high elastic coefficient, and low friction coefficient, wear-resistant and good vacuum tribological property, be well suited for as wear-resistant coating.
Adopt technique scheme, the Si-C transition layer can guarantee between DLC and interior surface of cylinder liner to have good bonding force.With the cylinder sleeve that there is no the DLC coating, compare, the hardness of cylinder-barrel surface of the present invention can reach 1500HV, the frictional coefficient of cylinder-barrel surface has reduced by 19%, through neutral salt spray test, show, cated cylinder sleeve is compared does not have cated cylinder sleeve, corrosion weight loss rate has reduced by 15%, and under the condition of engine oepration at full load, travelling speed is from 1000 to 1400rpm, fuel oil consumption has reduced 2.5%, indirectly reduced gaseous emission, and DLC coating cylinder sleeve is compared with the cylinder sleeve that there is no the DLC coating, control on the hone roughness of cylinder-barrel surface does not have much impacts.
The present invention is simple, the application vapour deposition is to carrying out plated film to improve wear resistance and the resistance to pitcorrosion of cylinder sleeve on interior surface of cylinder liner, the present invention not only can be applied to the internal surface of cylinder sleeve, also can be applied to the outside surface water channel part of wet liner, fully meet the requirement of Modern Engine, have a extensive future.
The accompanying drawing explanation
Fig. 1 is the structural representation that adopts technique exhaust hood cover of the present invention;
Fig. 2 is the enlarged view at A place in the middle of Fig. 1.
Embodiment
As depicted in figs. 1 and 2, DLC compound coating cylinder sleeve production technique of the present invention, comprise the following steps successively,
(1), workpiece is put into to confined chamber, confined chamber is vacuumized, make the air pressure in confined chamber reach 14 millitorrs;
(2), in confined chamber, be filled with Ar gas, and load the pulsed negative bias of 4KV on workpiece, because workpiece surface is negative electrode, workpiece surface constantly outwards discharges electronics, electronics and Ar atom bump and make its ionization, and at this moment whole confined chamber inside all has been full of built-in cathode tube discharge plasma, Ar positively charged, bombarded surface is accelerated in the attraction that is subject to workpiece, realizes the plasma clean workpiece surface;
(3), in confined chamber, be filled with trimethyl silane gas, first form the Si-C transition layer of 2um at work piece inner surface;
(4), in confined chamber, pass into hydrocarbon gas, just can form the DLC coating at work piece inner surface, the DLC coat-thickness is 3.5-5um, and this DLC coating is the pure carbon film of ta-C or film a-C:H:X.
Hydrocarbon gas in step (4) is acetylene or methane.
X in step (4) is metallic element or non-metallic element.Described non-metallic element is Si, O or N element.
Above-mentioned workpiece is cylinder sleeve 1.3 densifications of DLC coating, by having good bonding force between Si-C transition layer 2 and cylinder sleeve 1.
The present embodiment is not done any pro forma restriction to shape of the present invention, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all belong to the protection domain of technical solution of the present invention.
Claims (4)
1.DLC compound coating cylinder sleeve production technique is characterized in that: comprise the following steps successively,
(1), workpiece is put into to confined chamber, confined chamber is vacuumized, make the air pressure in confined chamber reach 14 millitorrs;
(2), in confined chamber, be filled with Ar gas, and load the pulsed negative bias of 4KV on workpiece, because workpiece surface is negative electrode, workpiece surface constantly outwards discharges electronics, electronics and Ar atom bump and make its ionization, and at this moment whole confined chamber inside all has been full of built-in cathode tube discharge plasma, Ar positively charged, bombarded surface is accelerated in the attraction that is subject to workpiece, realizes the plasma clean workpiece surface;
(3), in confined chamber, be filled with trimethyl silane gas, first form the Si-C transition layer of 2um at work piece inner surface;
(4), in confined chamber, pass into hydrocarbon gas, just can form the DLC coating at work piece inner surface, the DLC coat-thickness is 3.5-5um, and this DLC coating is the pure carbon film of ta-C or film a-C:H:X.
2. DLC compound coating cylinder sleeve production technique according to claim 1, it is characterized in that: the hydrocarbon gas in described step (4) is acetylene or methane.
3. DLC compound coating cylinder sleeve production technique according to claim 1 and 2, it is characterized in that: the X in described step (4) is metallic element or non-metallic element.
4. DLC compound coating cylinder sleeve production technique according to claim 3, it is characterized in that: described non-metallic element is Si, O or N element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310391532.8A CN103484834A (en) | 2013-09-02 | 2013-09-02 | Production process of DLC (Diamond Like Carbon) composite coating cylinder liner |
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| CN201310391532.8A CN103484834A (en) | 2013-09-02 | 2013-09-02 | Production process of DLC (Diamond Like Carbon) composite coating cylinder liner |
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| CN103484834A true CN103484834A (en) | 2014-01-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723684A (en) * | 2017-08-29 | 2018-02-23 | 南京朗仕億等离子体制造科技有限公司 | The polynary non-metallic layer preparation method of inner surface of cylinder liner based on plasma technique |
| CN108505017A (en) * | 2018-05-11 | 2018-09-07 | 中国电子科技集团公司第十六研究所 | A kind of DLC film layer preparation method accurately controlling DLC film layer thickness |
| CN110184564A (en) * | 2019-07-02 | 2019-08-30 | 南昌航空大学 | The preparation method of Mg alloy surface low stress, high bond strength Si/DLC thick film |
| CN111621757A (en) * | 2020-05-21 | 2020-09-04 | 沈阳中北通磁科技股份有限公司 | Neodymium-iron-boron permanent magnet with anti-corrosion wear-resistant coating and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958835A (en) * | 2005-11-01 | 2007-05-09 | 鸿富锦精密工业（深圳）有限公司 | Quasi cobalt carbon diaphragm |
| CN102261347A (en) * | 2010-05-25 | 2011-11-30 | 沈阳鼓风机集团股份有限公司 | Application of diamond-like film on impeller |
| US20120318228A1 (en) * | 2011-06-15 | 2012-12-20 | Aharonov Robert R | Germanium containing coating for inner surfaces of cylinder liners |
| CN103032566A (en) * | 2011-09-29 | 2013-04-10 | 菲特尔莫古布尔沙伊德有限公司 | Sliding element with DLC coating |
-
2013
- 2013-09-02 CN CN201310391532.8A patent/CN103484834A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958835A (en) * | 2005-11-01 | 2007-05-09 | 鸿富锦精密工业（深圳）有限公司 | Quasi cobalt carbon diaphragm |
| CN102261347A (en) * | 2010-05-25 | 2011-11-30 | 沈阳鼓风机集团股份有限公司 | Application of diamond-like film on impeller |
| US20120318228A1 (en) * | 2011-06-15 | 2012-12-20 | Aharonov Robert R | Germanium containing coating for inner surfaces of cylinder liners |
| CN103032566A (en) * | 2011-09-29 | 2013-04-10 | 菲特尔莫古布尔沙伊德有限公司 | Sliding element with DLC coating |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723684A (en) * | 2017-08-29 | 2018-02-23 | 南京朗仕億等离子体制造科技有限公司 | The polynary non-metallic layer preparation method of inner surface of cylinder liner based on plasma technique |
| CN107723684B (en) * | 2017-08-29 | 2019-11-19 | 南京朗仕億等离子体制造科技有限公司 | The polynary non-metallic layer preparation method of inner surface of cylinder liner based on plasma technique |
| CN108505017A (en) * | 2018-05-11 | 2018-09-07 | 中国电子科技集团公司第十六研究所 | A kind of DLC film layer preparation method accurately controlling DLC film layer thickness |
| CN110184564A (en) * | 2019-07-02 | 2019-08-30 | 南昌航空大学 | The preparation method of Mg alloy surface low stress, high bond strength Si/DLC thick film |
| CN111621757A (en) * | 2020-05-21 | 2020-09-04 | 沈阳中北通磁科技股份有限公司 | Neodymium-iron-boron permanent magnet with anti-corrosion wear-resistant coating and preparation method thereof |
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Application publication date: 20140101 |