CN103194719B - High-performance ceramic piston ring manufacturing technology - Google Patents
High-performance ceramic piston ring manufacturing technology Download PDFInfo
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- CN103194719B CN103194719B CN201210183090.3A CN201210183090A CN103194719B CN 103194719 B CN103194719 B CN 103194719B CN 201210183090 A CN201210183090 A CN 201210183090A CN 103194719 B CN103194719 B CN 103194719B
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- piston ring
- molybdenum
- top layer
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- ceramic
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Abstract
The present invention relates to high-performance ceramic piston ring manufacturing technology.At present, piston ring surface treatment technology mainly comprises electrodeposited chromium, surfaces nitrided, PVD and CVD plated film, plasma sprayed molybdenum, plasma spraying ceramic coat etc., but all there is different performance deficiencies, does not reach desirable effect.The present invention adopts double-deck glow plasma surface metallurgical technology, molybdenum (or chromium, titanium, tungsten) element is made to go deep in ordinary low-alloy steel piston ring top layer, again through vacuum ionic carbonization and subsequent heat treatment, become the Ceramic piston ring with the good comprehensive mechanical performance such as high rigidity, high-wearing feature.
Description
Technical field
The invention belongs to field of surface metallurgy.
Background technology
Piston ring is the key components and parts of the explosive motor such as automobile, motorcycle heart part.Its proportion in all component of engine is very little, but plays vital effect.Piston ring repeatedly moves in high temperature, high-pressure gas medium, and fierce friction occurs.The quality of piston ring performance directly has influence on the overall performance such as dynamic property, economy, reliability, fuel efficiency, exhaust emissions of engine.Along with modern internal combustion engines is to high-level efficiency, high-load, high speed and the future development of high life, more and more higher requirement is proposed to the wear resistance of piston ring and comprehensive mechanical performance.At present, adopt various process for treating surface to improve the use properties of piston ring both at home and abroad, mainly comprise electrodeposited chromium, surfaces nitrided, PVD and CVD plated film, plasma sprayed molybdenum, plasma spraying ceramic coat etc.But chromium coating fragility is large, easily comes off, chrome-plated process causes murder by poisoning to human body and environment, abroad forbid, domesticly also to cancel gradually.Surface hardness after surfaces nitrided is general not high, and thickness is general, can not meet the requirement of high-power engine.BN, CrN, SiN rete too book prepared by PVD and CVD coating technique, only 3 ~ 5 μm, supporting capacity is poor, can not meet high to carry, the needs of high-speed internal combustion engine, and complex process, somewhat expensive, limits and applies.Plasma sprayed molybdenum is oxidizable when high temperature to be peeled off, and can not meet the needs of Modern Internal-Combustion Engine development.In recent years, plasma spraying ceramic coat is adopted to carry out surface treatment to piston ring both at home and abroad.Stupalith can reduce the frictional coefficient between piston ring and steam jacket greatly, and effectively reduce the friction loss between piston ring and cylinder, the mechanical efficiency of engine is improved, and the effect especially when high speed is particularly evident.The problem of this technology is that ceramic coating exists fragility, also there is the interface on the low side with substrate combinating strength, produces stress and peels off.
From last century Mo to the beginning of this century, double-deck glow plasma surface metallurgical technology starts to be applied to metal surface properties modification engineering.It for matrix, produces the advanced metal material product of various excellent performance with common product of metal material.
Summary of the invention
The object of the invention is the deficiency overcoming prior art existence, a kind of high-performance ceramic piston ring manufacturing technology is provided.(for molybdenum)
Basic conception of the present invention is; Adopt double-deck glow plasma surface metallurgical technology, make molybdenum become molybdenum ion, under electrical forces effect, the countless lattice defect passages that molybdenum ion is formed under high temperature enter piston ring top layer certain depth, then form molybdenum carbide ceramics layer through vacuum ionic carbonization.
The present invention is achieved by the following technical solutions:
1. low alloy steel piston ring and molybdenum materials are placed in corresponding position in rough vacuum (8.0Pa) barrel-shaped negative electrode, pass into argon gas (air pressure 30 ~ 40Pa).Through twice current break, form double skin facade system, produce 800 ~ 1000 DEG C of high temperature.
2. molybdenum materials sputters atoms metal rapidly in High temperature ion district, and atoms metal is ionized to molybdenum ion again in energetic ion district.
3. the lattice defect passage such as countless dislocations, room that molybdenum ion is at high temperature formed along piston ring surface under electrical forces effect gos deep into 100 ~ 300 μm, piston ring top layer.
4., again through vacuum ionic carbonization, form molybdenum carbide ceramics layer.
The Ceramic piston ring of the technology of the present invention manufacture there occurs the change of matter due to its mantle micro structure and performance, compared with existing various piston ring surface treatment technology, has the following advantages:
1, high rigidity: HV1300 ~ 1500 is more than 3 times of v-cr-mo alloy steel ring;
2, frictional coefficient is low: piston set friction minimizing 50%;
3, wear resistance ratio is only 1/5 of common steel loop;
4, ceramic wear-resisting layer depth can reach 100 ~ 300 μm, is 30 ~ 50 times of PVD and CVD ceramic membrane thickness, is more than 6 times of nitrogenize steel loop;
5, strong, the high-temperature resistant gas corrosion of Heat stability is good, anti-scuffing function;
6, ceramic wearing coat and piston ring substrate are metallurgical binding, Dispersed precipitate, formation sosoloid; Compare with electrodeposited chromium, plasma sprayed molybdenum, plasma sprayed ceramic layer, there is not macroscopic interface, do not produce stress and peel off;
7, ceramic wearing coat gos deep into, in piston ring top layer, not increasing skin depth, and its size and the accuracy of form and position can ensure.
Accompanying drawing explanation
Double-deck glow plasma surface metallurgic device schematic diagram
Embodiment
Embodiment (for molybdenum) is provided below in conjunction with accompanying drawing
Primary source 1 exports 0 ~ 1000V for cathode and anode.Cathode block 7 connects primary source 1 negative terminal, and anode 8 connects primary source 1 anode.Bias supply 2 exports 0 ~ 450V for bias ring 3.Vacuum chamber 4 has Ar inlet 5 and vacuum pumping opening 6.Barrel-shaped negative electrode 9 upper end open, final vacuum is 8.0Pa, and argon pressure is 30 ~ 40Pa; Bias voltage is 240 ~ 450v.Increase main power voltage to 500 ~ 600V gradually, at this moment occur first time current break, produce aura; Continue to increase voltage to 600 ~ 800V, occur second time current break, normal glow discharge changes into anomalous glow discharge, produces the high temperature of 800 ~ 1000 DEG C again.The molybdenum materials 11 of barrel-shaped negative electrode 9 surrounding sputters atoms metal, atoms metal is ionized to metal ion again in energetic ion district, the passage that molybdenum ion is at high temperature formed along the lattice defect such as dislocation, room under electrical forces effect enters into piston ring 10 top layer, and the degree of depth reaches 100 ~ 300 μm.Again through vacuum ionic carbonization, piston ring 10 top layer forms molybdenum carbide ceramics layer.
The technical process of the high-performance ceramic piston ring be made up of the present invention is as follows:
Steel circle the ribbon → quench, tempering → medial and lateral chamfering → double-deck glow plasma surface metallurgic → vacuum ionic carbonization → high pressure gas quenching → opening → honing → fine grinding side → inspection at end.
Claims (2)
1. one kind manufactures high-performance ceramic piston ring method used, it is characterized in that: low alloy steel piston ring and molybdenum materials are placed in barrel-shaped negative electrode that final vacuum is 8.0Pa, the upper end open of barrel-shaped negative electrode, piston ring is positioned on the cathode block that is connected with primary source negative terminal, molybdenum materials is located at barrel-shaped negative electrode inwall surrounding, pass into the argon gas that pressure is 30 ~ 40Pa, bias voltage is 240 ~ 450V;
Increase main power voltage to 500 ~ 600V gradually, occur first time current break generation aura, continue to increase main power voltage to 600 ~ 800V, occur second time current break, formation double skin facade system, produces 800 ~ 1000 DEG C of high temperature;
Molybdenum materials sputters atoms metal, is ionized to molybdenum ion again, and the countless dislocations that molybdenum ion is formed under high temperature, room lattice defect passage go deep into piston ring top layer, then through vacuum ionic carbonization, forms molybdenum carbide ceramics layer on piston ring top layer.
2. the method that manufacture high-performance ceramic piston ring according to claim 1 is used, is characterized in that: molybdenum ion, under the effect of electrical forces, gos deep into 100 ~ 300 μm, piston ring top layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210183090.3A CN103194719B (en) | 2012-01-05 | 2012-05-23 | High-performance ceramic piston ring manufacturing technology |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210001378 | 2012-01-05 | ||
| CN2012100013784 | 2012-01-05 | ||
| CN201210001378.4 | 2012-01-05 | ||
| CN201210183090.3A CN103194719B (en) | 2012-01-05 | 2012-05-23 | High-performance ceramic piston ring manufacturing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103194719A CN103194719A (en) | 2013-07-10 |
| CN103194719B true CN103194719B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210183090.3A Expired - Fee Related CN103194719B (en) | 2012-01-05 | 2012-05-23 | High-performance ceramic piston ring manufacturing technology |
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| CN (1) | CN103194719B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015988B (en) * | 2021-11-04 | 2022-11-29 | 上海交通大学 | Method and apparatus for surface alloying treatment |
| CN115418600A (en) * | 2022-08-25 | 2022-12-02 | 淄博国创中心先进车用材料技术创新中心 | Wear-resistant piston ring of internal combustion engine and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034229A (en) * | 1987-06-20 | 1989-07-26 | 太原工业大学 | Ion implantation technique for cutting tools |
| CN1305023A (en) * | 2000-10-19 | 2001-07-25 | 太原理工大学 | Plasma surface-alloying process for titanium alloy |
| CN101177725A (en) * | 2007-12-01 | 2008-05-14 | 太原理工大学 | Surface metallurgy technique for cobalt-containing super-hard high-speed steel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01156461A (en) * | 1987-12-14 | 1989-06-20 | Riken Corp | Surface treatment of piston ring |
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2012
- 2012-05-23 CN CN201210183090.3A patent/CN103194719B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034229A (en) * | 1987-06-20 | 1989-07-26 | 太原工业大学 | Ion implantation technique for cutting tools |
| CN1305023A (en) * | 2000-10-19 | 2001-07-25 | 太原理工大学 | Plasma surface-alloying process for titanium alloy |
| CN101177725A (en) * | 2007-12-01 | 2008-05-14 | 太原理工大学 | Surface metallurgy technique for cobalt-containing super-hard high-speed steel |
Non-Patent Citations (1)
| Title |
|---|
| 20Cr2V2基表面含钴超硬高速钢的研究;刘沙沙;《中国优秀硕士学位论文全文数据库(电子期刊) 工程科技Ⅰ辑》;20081015(第10期);第6、8、21-24、27-28、37、56页 * |
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| CN103194719A (en) | 2013-07-10 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20151225 Address after: 610042 No. 68 KELONG North Road, Chengdu, Sichuan, Wuhou District Applicant after: Chengdu purple Technology Co., Ltd. Address before: 610212 Sichuan Province, Chengdu City high-tech zones and 32 Street No. 4 Building 1 unit 5 Applicant before: Zeng Yunfa |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160120 Address after: 610212 Sichuan Province, Chengdu City high-tech zones and 32 Street No. 4 Building 1 unit 5 Applicant after: Zeng Yunfa Address before: 610042 No. 68 KELONG North Road, Chengdu, Sichuan, Wuhou District Applicant before: Chengdu purple Technology Co., Ltd. |
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Granted publication date: 20160302 Termination date: 20190523 |
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| CF01 | Termination of patent right due to non-payment of annual fee |