激光微造型球墨铸铁表面的摩擦学特性  

Tribological Behavior of Laser Textured Nodular Cast Iron Surface

作　　者：周建忠[1] 王建军[1] 冯旭[1] 孟宪凯[1] 徐家乐[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《中国激光》2016年第6期95-101,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(51575247);江苏省研究生创新项目(1011110008)

摘　　要：采用激光喷丸在球墨铸铁QT600表面加工出具有不同凹坑中心距的微凹坑造型阵列,研究了激光微造型对其表面摩擦磨损性能的影响。仪器测试结果表明,相比于未造型试样,激光喷丸在球墨铸铁表面引入有益的残余压应力,磨损量明显降低,干摩擦条件下降幅达7.9%。微造型试样在干摩擦条件下的表面摩擦系数明显提高,增幅最大可达12.9%,而湿摩擦条件下则明显降低,降幅最高可达11.8%;同时微造型试样表面磨损程度明显轻于未造型试样表面,氧化物也明显减少。The micro-dent pattern with different center distances was fabricated on nodular cast iron QT600 specimens by laser peening, and the effect of laser texturing on its surface friction and wear properties was investigated. The results show that the beneficial compressive residual stress was introduced on nodular cast iron QT600 surface by laser peening, and the wear mass loss is significantly reduced by 7.9 % under dry friction conditions. Compared with that of the untextured specimens, the friction coefficient of the textured surface increases by 12.9% under dry conditions, and decreases by 11.8 % under lubrication conditions. Meanwhile, the surface wear of the textured specimens is obviously weaker than that of the untextured ones, and the oxide content also decreases obviously.

关 键 词：激光技术 激光喷丸 残余应力 摩擦系数 磨痕形貌 

分 类 号：TN249[电子电信—物理电子学]