CN202867020U - Piston ring with ceramic two-phase structure coating - Google Patents
Piston ring with ceramic two-phase structure coating Download PDFInfo
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- CN202867020U CN202867020U CN2012204332252U CN201220433225U CN202867020U CN 202867020 U CN202867020 U CN 202867020U CN 2012204332252 U CN2012204332252 U CN 2012204332252U CN 201220433225 U CN201220433225 U CN 201220433225U CN 202867020 U CN202867020 U CN 202867020U
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Abstract
The utility model relates to a piston ring for an engine, in particular to the piston ring with a ceramic two-phase structure coating. The piston ring with the ceramic two-phase structure coating comprises a piston ring metallic matrix, wherein the ceramic two-phase structure coating prepared by using supersonic spraying technology is arranged on the surface of the matrix, and the thickness of the coating is 100-500 microns. A ceramic two-phase structure consists of a ceramic phase and an alloy phase, and the ceramic phase is embedded into an alloy phase matrix. The ceramic phase is one or two mixtures of tungsten carbide and chromium carbide, and the alloy phase is one or more mixtures of nickel, chromium, molybdenum, iron, aluminum and titanium. The coating with the ceramic two-phase structure can improve antiblocking burning loss performance, possesses high bonding strength, is not prone to crazing and falling off, and further possesses high abrasion resistance, attrition rate is lowered by 30%-40% than current plasma technology, and meanwhile, high ablation resistance is also achieved. The piston ring with the ceramic two-phase structure coating can further meet the continuously improved requirements of a future engine, and under the conditions that long-term tightness is not changed, and low discharge and fuel consumption are guaranteed, operation effect is improved.
Description
Technical field
:
The utility model relates to the preparation technology of piston ring for engine, is specifically related to the coating preparation of piston ring surface.
Background technique
:
Alternate-engine will be to high efficiency, high loading, reach at a high speed the future development of long-life, and this just has higher requirement to its durability and reliability.Be accompanied by the in short supply of petroleum resources, the degree of concern of the fuel economy of motor is also being improved constantly, countries in the world strengthening gradually, have been put into effect a series of more strict tail-gas laws to the protection consciousness of environment in succession simultaneously.Piston ring is as the critical component that directly affects motor operational safety and the economic feature of environmental protection, and the quality of its performance directly has influence on the overall performance of motor, and the piston ring surface treatment technology has been proposed more and more higher requirement.
In the prior art, the treatment technology of piston ring surface mainly contains: electrochromism, nitrogenize and plasma sprayed molybdenum.The chromium coating compact structure, decay resistance is good, and micro-penetration hardness can reach 700-1 000HV, can obviously improve the wear resistance of piston ring, improves its working life.But chromium coating fragility is very big, and easily cracked coming off aggravated the wearing and tearing of cylinder, and the chromium coating anti-scuffing of cylinder bore can be also relatively poor.In addition, the power consumption of electrochromism technique is very big, and toxicity is large, is easy to human body generation murder by poisoning with to environment.Piston ring nitriding treatment technology is subject to extensive concern with characteristics such as its process economics are reliable, environmentally friendly, is the main method that present piston ring surface is processed.Although nitriding process is simple to operate, the piston ring surface hardness after processing is not high, and alloying layer thickness is limited, often can not satisfy the usage requirement of high power engine.The plasma spraying molybdenum coating piston ring has lower friction factor and higher hydrodynamiclubrication tendency, and when temperature raise, it is more obvious that this tendency becomes.Plasma sprayed molybdenum piston ring can also adapt to preferably the EGR (EGR) of motor and reduce the requirement of engine oil consumption.The shortcoming of its maximum is exactly that the hardness of molybdenum coating is lower, agrees its wear resistance relatively poor.Easy oxidative exfoliation during high temperature, and under the condition that lacks lubricant oil or deterioration of oil, friction factor and wear rate are all larger.
Summary of the invention
:
The purpose of this utility model is, for deficiency of the prior art, provide a kind of surface that utilizes plasma spray technology to obtain to have the piston ring of automobile engine of ceramic coating, with its high abrasion, high resistance scuffing of cylinder bore performance and low coefficient of friction performance, satisfy the requirement of the high moment of torsion of motor, high output and low emission.
The technical solution of the utility model is as follows:
Piston ring with ceramic two phase structure coating of the present utility model, include the piston ring metallic matrix, it is characterized in that, be provided with the ceramic two phase structure coating of using the preparation of supersonic spray coating technology on the surface of this matrix, the thickness of coating is the 100-500 micron, and described ceramic two phase structure is by Tungsten carbite (WC), chromium carbide (Cr
3C
2) in one or both the ceramic phase of compositions of mixtures, with by one or more the alloy phase of compositions of mixtures in metallic nickel (Ni), chromium (Cr), molybdenum (Mo), iron (Fe), aluminium (Al), the titanium (Ti), ceramic phase is embedded in the alloy phase matrix; Wherein, the mass ratio of ceramic phase and alloy phase is 1:(0.25-4).
Ceramic two phase structure coating of the present utility model is to use the preparation of supersonic spray coating (HVOF) technology, spraying raw material Tungsten carbite (WC), chromium carbide (Cr
3C
2) and raw metal nickel (Ni), chromium (Cr), molybdenum (Mo), iron (Fe), aluminium (Al), titanium (Ti) be micron-sized powder.
Ceramic two phase structure coating of the present utility model is to use the supersonic spray coating technology, with the chromium carbide in the supersonic flame, tungsten carbide ceramics powder and metallic nickel-chromium-molybdenum powder implantation and sintering are at the piston ring working surface, under the internal compressive stress in coating, form the carbide coating that embeds in nickel-chromium-molybdenum matrix.Nickel-chromium-molybdenum is so that coating forms firmly with piston ring body is combined, and ceramic phase chromium carbide and Tungsten carbite can provide high surface hardness, and this coating has porosity, the highest bond strength and 800-1200 HV hardness.The ceramic coating tissue of this two phase structure can not only improve the anti-stick scaling loss performance that connects, and not easily broken coming off also has high wear resistance.Actual measurement shows, its degree of wear reduces 30%-40% than current plasma technology, also has simultaneously the coat system of higher anti-ablation ability and low self wearing and tearing.Therefore, the piston ring with ceramic two phase structure coating of the present utility model can further satisfy the requirement that alternate-engine improves constantly, and namely when not changing long term seal and guaranteeing lower discharging and oil consumption, improves the operation effect.The preparation method of ceramic two phase structure coating of the present utility model is simple and convenient, and is pollution-free, can not have a negative impact to personnel and environment.
Be described further below by way of embodiments and drawings.
Description of drawings
:
Fig. 1 is the partial structurtes schematic diagram with piston ring of ceramic two phase structure coating of the present utility model.
Embodiment:
The mass ratio of embodiment's 1 ceramic phase and alloy phase is 1:1
Referring to Fig. 1, at the metallic matrix outer surface of piston ring 1 ceramic two phase structure coating 2 is arranged, the thickness of coating is 300 microns.This coating is to use supersonic spray coating technology, machined preparing again.Spraying is the mixture of micron-sized Tungsten carbite (WC) and Ni-Cr-Mo (Ni-Cr-Mo) alloy with raw material, they are commercially available particle diameter micron order powder, and in this mixture, Tungsten carbite and NI-CR-MO alloys consumption respectively are 1/2, in NI-CR-MO alloys, nickel, chromium, molybdenum three composition respectively are 1/3.
After tested, the performance parameter of the ceramic two phase structure coating of the present embodiment is: surface hardness is higher than 800HV; Adhesive strength: be higher than 60MPa, porosity ratio: be lower than 7%; Wear-resisting property: under same fretting wear condition, improve 30-40% than the coating with plasma spraying molybdenum.
The ratio of embodiment's 2 ceramic phases and alloy phase is 1:3
The ratio of ceramic phase and alloy phase is adjusted into 1:3, and namely the consumption of Tungsten carbite is 1/4, and the NI-CR-MO alloys consumption is 3/4, and wherein in the NI-CR-MO alloys, nickel, chromium, molybdenum three consumption are constant, namely respectively are 1/3.
After tested, the performance parameter of the ceramic two phase structure coating of the present embodiment is: surface hardness is about 800HV; Adhesive strength: be higher than 90MPa, porosity ratio: be lower than 7%; Wear-resisting property: under same fretting wear condition, improve 30-40% than the coating with plasma spraying molybdenum.
Under same fretting wear condition, the coating that plasma spray coats improves 30-40%.
The present embodiment shows, increases the quality of alloy phase, is conducive to improve the adhesive strength of ceramic composite coating.
The ratio of embodiment's 3 ceramic phases and alloy phase is 3:1
The ratio of ceramic phase and alloy phase is adjusted into 3:1, and namely the consumption of Tungsten carbite is 3/4, and the NI-CR-MO alloys consumption is 1/4, and wherein in the NI-CR-MO alloys, each composition consumption is constant.
After tested, the performance parameter of the ceramic two phase structure coating of the present embodiment is: surface hardness is higher than 1200 HV; Adhesive strength: be higher than 50MPa, porosity ratio: be lower than 7%; Wear-resisting property: under same fretting wear condition, improve 30-40% than the coating with plasma spraying molybdenum.
The present embodiment shows, increases the quality of ceramic phase, is conducive to improve the surface hardness of ceramic composite coating.
Claims (1)
1. piston ring with ceramic two phase structure coating, include the piston ring metallic matrix, it is characterized in that, be provided with the ceramic two phase structure coating of using the preparation of supersonic spray coating technology on the surface of this matrix, the thickness of coating is the 100-500 micron, described ceramic two phase structure is by a kind of ceramic phase that forms in Tungsten carbite, the chromium carbide, and by a kind of alloy phase that forms in metallic nickel, chromium, molybdenum, iron, aluminium, the titanium, ceramic phase is embedded in the alloy phase matrix; Wherein, the mass ratio of ceramic phase and alloy phase is 1:(0.25-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204332252U CN202867020U (en) | 2012-08-29 | 2012-08-29 | Piston ring with ceramic two-phase structure coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204332252U CN202867020U (en) | 2012-08-29 | 2012-08-29 | Piston ring with ceramic two-phase structure coating |
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| Publication Number | Publication Date |
|---|---|
| CN202867020U true CN202867020U (en) | 2013-04-10 |
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|---|---|---|---|
| CN2012204332252U Expired - Fee Related CN202867020U (en) | 2012-08-29 | 2012-08-29 | Piston ring with ceramic two-phase structure coating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808703A (en) * | 2012-08-29 | 2012-12-05 | 安徽禹恒材料技术有限公司 | Piston ring with ceramic two-phase structured coating |
| CN104388884A (en) * | 2014-10-30 | 2015-03-04 | 安徽鼎恒再制造产业技术研究院有限公司 | Wear-resistant Ni45-WC nano coating and preparation method thereof |
| CN114481130A (en) * | 2022-01-26 | 2022-05-13 | 国家电投集团科学技术研究院有限公司 | Overcurrent component and manufacturing method thereof |
-
2012
- 2012-08-29 CN CN2012204332252U patent/CN202867020U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808703A (en) * | 2012-08-29 | 2012-12-05 | 安徽禹恒材料技术有限公司 | Piston ring with ceramic two-phase structured coating |
| CN104388884A (en) * | 2014-10-30 | 2015-03-04 | 安徽鼎恒再制造产业技术研究院有限公司 | Wear-resistant Ni45-WC nano coating and preparation method thereof |
| CN114481130A (en) * | 2022-01-26 | 2022-05-13 | 国家电投集团科学技术研究院有限公司 | Overcurrent component and manufacturing method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHU DINGHENG MATERIAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ANHUI YUHENG MATERIAL TECHNOLOGY COMPANY LIMITED Effective date: 20140214 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 230088 HEFEI, ANHUI PROVINCE TO: 241000 WUHU, ANHUI PROVINCE |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140214 Address after: 241000 Wuhu high tech Industrial Development Zone in Southern District of small and medium enterprises in the park, building No. 11, Anhui Patentee after: Wuhu Dingheng Materials Technology Co., Ltd. Address before: 230088, D2, building 101, animation and service outsourcing base, Wangjiang West Road, 800 hi tech Zone, Anhui, Hefei Patentee before: Anhui Yuheng Material Technology Co.,Ltd. |
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| 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: 20130410 Termination date: 20170829 |