摘要
为提高铸铁材料表面磨损性能,采用JMG-GY-300D脉冲激光器在两种介质(空气和水)中对QT500球墨铸铁表面进行冲击强化处理。对强化区的微观组织、显微硬度和摩擦磨损性能进行了测试与分析。激光冲击强化后,强化区显微组织含有大量的孪晶和滑移,强化区显微硬度明显提高。在M200摩擦磨损试验机上进行干摩擦磨损性能测试。结果表明,磨损的主要机制为粘着型磨损,在水介质下进行激光冲击改性的试样耐磨性能较好。
In order to enhance the surface wear properties of cast iron, some QTS00 specimens are processed with JMG-GY-300D pulsed laser in different medium（air and water）, and the microstructure, micro-hardness and frictional characterization are examined and analyzed. The experimental results showed that, after laser shock processing, a lot of dislocations and twins are found in the strengthening layer, hardness is improved significantly. The friction and wear behaviors are tested using a M200 friction and wear test apparatus under dry sliding condition. It is found that the main wear mechanism is adhesion wear, the friction and wear resistance of cast iron in water is better than in air.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第9期112-116,共5页
Laser & Optoelectronics Progress
基金
吉林省教育厅汽车燃油箱庄盖模具激光加工技术开发项目
关键词
激光光学
激光冲击
球墨铸铁
显微组织
显微硬度
磨损性能
laser optics
laser shock processing
cast iron
microstructure
micro-hardness
wear resistance
