激光冲击对AISI304不锈钢拉伸性能和摩擦磨损性能的影响  

Influence of Laser Shock Processing on Tensile Properties and Tribological Behaviors of AISI304 Stainless Steel

作　　者：钟金杉[1] 鲁金忠[1] 罗开玉[1] 齐晗[1] 王志龙[1] 韩彬[1] 刘娟[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》2013年第5期62-68,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(51105179;51275220);江苏省自然科学基金(BK2011478);中国博士后特别资助项目(2012T50465);高校科研成果产业化推进项目(JHB2011-38);中国博士后科学基金(20110491349);江苏省博士后基金(1101018B);江苏省高校"青蓝工程";江苏大学青年骨干教师计划;江苏大学学生科研立项(10A094)资助课题

摘　　要：采用高能纳秒激光对AISI304不锈钢表面进行冲击强化,测定激光冲击前后AISI304不锈钢的抗拉强度和应力-应变曲线,系统研究了激光冲击增大不锈钢抗拉强度的机理;测量冲击前后的摩擦系数和磨损性能,研究了激光冲击对AISI304不锈钢摩擦磨损性能的影响规律。结果表明:激光冲击纳米晶化AISI304不锈钢表层,从而提高不锈钢的抗拉强度;激光冲击强化提高AISI304不锈钢的磨损性能,略微增大AISI304不锈钢的摩擦系数。Tensile properties and wear behaviors of AISI304 stainless steel after laser shock processing （LSP） with different processing parameters are investigated. Ultimate tensile strength （UTS） values and stress-strain curves of all four kinds of tensile samples are measured, and the improvement mechanism of UTS generated by LSP is also revealed. Wear properties and friction coefficients of AIS1304 stainless steel with and without LSP are compared, and the influence rule of LSP on wear properties and friction coefficients of AISI304 stainless steel are systematically analyzed. The results show that LSP can improve the UTS of AIS1304 stainless steel, which is due to the surface nanocystalization. In addition, LSP enhances the wear properties, and slightly increases the friction coefficients of AIS1304 stainless steel.

关 键 词：激光技术 激光冲击强化 纳米晶化 AISI304不锈钢 拉伸性能 摩擦磨损 

分 类 号：TN249[电子电信—物理电子学]