CN100434569C - Method for modifying environment protection piston ring surface - Google Patents
Method for modifying environment protection piston ring surface Download PDFInfo
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- CN100434569C CN100434569C CNB200510112685XA CN200510112685A CN100434569C CN 100434569 C CN100434569 C CN 100434569C CN B200510112685X A CNB200510112685X A CN B200510112685XA CN 200510112685 A CN200510112685 A CN 200510112685A CN 100434569 C CN100434569 C CN 100434569C
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Abstract
The present invention relates to a method for modifying the surface of an environmental-protection piston ring, which belongs to the field of material surface engineering. The method is mainly characterized in that chromium is coated on the surface of the piston ring by a method of combining physical vapor deposition and laser surface modification. In the present invention, first, chromium is coated on the surface of the piston ring by a method of physical vapor deposition, wherein the thickness of the chromium coating is from 1 mu m to 1500 mu m; then, the operation of laser surface modification is performed on the surface of the chromium coating by a CO2 laser device or a YAG laser device so that the chromium is diffused in the piston ring or the chromium and the piston ring are alloyed, wherein the work atmosphere is atmospheric gas or inert gas. The present invention has the advantages of simple process, easy control of course, firm combination of the chromium coating and the substrate of the piston ring and no pollution to environment.
Description
Technical field
The present invention relates to a kind of piston ring surface modifying method of environmental protection, relate to a kind of method that combines with physical vapor deposition and laser surface modification or rather chromium plating is carried out on the piston ring surface, belong to the material surface engineering field.
Background technology
Piston ring is an important component of oil engine, and the good and bad direct relation of its performance the quality of oil engine.Wear resistance is one of most important performance of piston ring material, for improving its wear resistance, prolongs its work-ing life, and it is very necessary that the surface of piston ring is handled.The most general method is a hard chrome plating, uses chrome plated piston ring can significantly improve work-ing life of piston ring, generally to the periphery hard chrome plating of top compression ring and support spring oil ring, has also that to increase the side on this basis more chromed.Chromed hardened piston ring accounts for piston ring sum 50%-70%, and chrome plated piston ring generally adopts the electroplating technique method at present.In the chromed production process of electrochemical plating, a large amount of noxious gas emissions is arranged in atmosphere, have influence on the healthy of operator and cause the hexavalent chromium in topsoil, the especially electroplate liquid very big the pollution of environment.Along with the enhancing of countries in the world environmental consciousness, guaranteeing that material has under the prerequisite of satisfied use properties, adopting various measures to reduce materials is aspect the Materials science worker put forth effort at present to study to the influence of environment in processing and use.Desire realizes the Sustainable development of traditional material industry, and key is to adopt the technology of environmental protection, the burden that increases to environment in the lightening material production process.Therefore, on the process for treating surface of piston ring, the technology of development environmental protection has great importance.
Summary of the invention
The object of the present invention is to provide a kind of piston ring surface modifying method of environmental protection, this method of modifying has fast, safety, process advantage such as control easily, and it is on the low side and cause environmental pollution problems that it can solve in the electroplating technology bonding strength of chromium coating and piston ring substrate.
In order to realize the foregoing invention purpose, the present invention adopts following technical scheme:
The piston ring surface modifying method of an environmental protection, it is characterized in that physical vapor deposition and laser surface modification are combined at piston ring surface deposition chromium, the method of at first utilizing physical vapor deposition is at piston ring surface deposition last layer chromium, utilize laser apparatus that chromium coating is carried out laser surface modification then, increase the bonding strength of coating and substrate.Its concrete operations step is as follows:
1. the surfacing pre-treatment of piston ring: the surfacing of piston ring is polished or polish, reach certain smooth finish, and then piston ring is cleaned, keep the piston ring cleaning surfaces;
2. chromium plating: with the method (comprising evaporation coating method, sputter coating method, ion plating method, molecular beam epitaxy plating method) of physical vapor deposition in the piston ring chrome-faced;
3. laser surface modification: use CO
2Laser apparatus or YAG laser apparatus adopt pulse mode to carry out LASER HEAT TREATMENT to the chromium coating surface, and work atmosphere is atmosphere or rare gas element.
In above-mentioned technology, the thickness of chromium layer is generally 1 μ m-1500 μ m.In the laser surface modification step, if chromium coating generation fusion also needs to carry out the polished finish of surfacing at last again, to guarantee the smooth degree of chromium plating face.
Use the chrome plated piston ring that method provided by the invention obtains, its chromium plating face is smooth and tiny crack is many, be beneficial to lubricatedly, the chromium in the coating can be diffused in the substrate of piston ring, thereby the bonding force of chromium coating and piston ring substrate is better than tradition and electroplates the chrome plated piston ring that legal system is equipped with.Because it is big that LASER HEAT TREATMENT has an instantaneous heating, fast cooling, thermograde, this method does not change the microstructure of the material of piston ring own.In addition, another outstanding advantage of the present invention is that this method can not pollute environment, has avoided the discharging of obnoxious flavour and electroplate liquid in the electroplating technology.
Description of drawings
Fig. 1: the scanning electron microscope image of sputtering sedimentation chromium film behind laser surface modification;
Fig. 2: behind the YAG laser surface modification, the chromium element distribution curve that electronic probe records, the K of employing Co
αRadiation.Be the surface of chromium coating the zero point of X-coordinate among the figure, on the X-coordinate data represented this with the distance of coating surface.
Embodiment
Following example is unrestricted the present invention in order further to illustrate technological process feature of the present invention.
Getting the piston of automobile ring material is sample, after thin abrasive paper for metallograph polishing, reaches certain smooth finish through polished finish again.Stand-by after ultrasonic cleaning in dehydrated alcohol.The piston ring of cleaning is carried out magnetron sputtering chromium plating film, and the speed of sputter is 10nm/min, and the thickness that sputter obtains the chromium film is 500 μ m.With the YAG laser apparatus plated film is carried out surface modification at last, pulse-repetition is 1KHz,, pulsed current is 15A, sweep velocity is 30mm/sec.
Accompanying drawing 1 is the scanning electron microscope image of sputtering sedimentation chromium film behind laser surface modification, and can clearly observe has on the face much lubricated favourable tiny crack, and the microstructure of chromium film is close in this chromium film and the traditional electrochemical plating.
Accompanying drawing 2 is the distribution curve of chromium element behind the YAG laser surface modification, and the chromium in the coating is basad as we know from the figure spreads, thereby has increased the bonding force of coating and substrate, has improved the work-ing life of piston ring.
Claims (4)
1. the piston ring surface modifying method of an environmental protection, it is characterized in that physical vapor deposition and laser surface modification are combined at piston ring surface deposition chromium, the method of at first utilizing physical vapor deposition is at piston ring surface deposition last layer chromium, utilize laser apparatus that chromium coating is carried out laser surface modification then, increase the bonding strength of coating and substrate, wherein, the method for laser surface modification is: use CO
2Laser apparatus or YAG laser apparatus adopt pulse mode to carry out LASER HEAT TREATMENT to the chromium coating surface, and work atmosphere is atmosphere or rare gas element.
2. piston ring surface modifying method as claimed in claim 1, it is characterized in that this method comprises the surfacing pre-treatment step of piston ring: the surfacing of piston ring is polished or polish, reach certain smooth finish, and then piston ring is cleaned, keep the piston ring cleaning surfaces.
3. piston ring surface modifying method as claimed in claim 1 or 2, the method that it is characterized in that physical vapor deposition are any in evaporation coating method, sputter coating method, ion plating method and the molecular beam epitaxy plating method.
4. piston ring surface modifying method as claimed in claim 3, the thickness that it is characterized in that the chromium layer film of physical vapor deposition are 1 μ m-1500 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510112685XA CN100434569C (en) | 2005-10-14 | 2005-10-14 | Method for modifying environment protection piston ring surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510112685XA CN100434569C (en) | 2005-10-14 | 2005-10-14 | Method for modifying environment protection piston ring surface |
Publications (2)
| Publication Number | Publication Date |
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| CN1752293A CN1752293A (en) | 2006-03-29 |
| CN100434569C true CN100434569C (en) | 2008-11-19 |
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| CNB200510112685XA Expired - Fee Related CN100434569C (en) | 2005-10-14 | 2005-10-14 | Method for modifying environment protection piston ring surface |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974773B (en) * | 2010-11-11 | 2012-05-23 | 山东电力研究院 | Method for improving stress corrosion resistance of Incone1609 alloy heat transfer tube |
| CN104017977A (en) * | 2014-06-11 | 2014-09-03 | 温州大学 | Cam surface composite treatment process of combustion engine crank shaft |
| CN106282921B (en) * | 2016-08-31 | 2018-07-27 | 首都师范大学 | A method of carbon film hydridization ratio prepared by regulation and control magnetron sputtering |
| CN107739814B (en) * | 2017-10-24 | 2019-03-26 | 郑震 | A method of effectively improving NC cutting tool Durability |
| CN109355623B (en) * | 2018-11-28 | 2020-06-02 | 福建工程学院 | Preparation method of wear-resistant, acid-resistant and nontoxic artificial graft film layer |
| CN109355624B (en) * | 2018-11-28 | 2020-09-04 | 福建工程学院 | Diamond-like carbon composite film on surface of cutter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690861A (en) * | 1985-03-11 | 1987-09-01 | Ricoh Co., Ltd. | Magneto optical recording medium |
| CN1663027A (en) * | 2002-06-25 | 2005-08-31 | 先进微装置公司 | Method using silicide contacts for semiconductor processing |
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2005
- 2005-10-14 CN CNB200510112685XA patent/CN100434569C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690861A (en) * | 1985-03-11 | 1987-09-01 | Ricoh Co., Ltd. | Magneto optical recording medium |
| CN1663027A (en) * | 2002-06-25 | 2005-08-31 | 先进微装置公司 | Method using silicide contacts for semiconductor processing |
Non-Patent Citations (2)
| Title |
|---|
| 模具制造的表面工程技术. 罗正斌，周柳奇.金属成形工艺，第21卷第4期. 2003 |
| 模具制造的表面工程技术. 罗正斌，周柳奇.金属成形工艺，第21卷第4期. 2003 * |
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| CN1752293A (en) | 2006-03-29 |
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Granted publication date: 20081119 Termination date: 20111014 |