激光冲击处理对304不锈钢力学性能的影响  

Influence of laser shock processing on mechanical property of SUS304 steel

作　　者：马壮[1] 李应红[1] 张永康[2] 任旭东[2] 张凌峰[2] 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]江苏大学机械工程学院,江苏镇江212013

出　　处：《材料热处理学报》2007年第3期102-105,共4页Transactions of Materials and Heat Treatment

基　　金：国防预研基金(513270103);国家自然科学基金(50675089)

摘　　要：选用不同涂层对304不锈钢板材激光冲击处理,研究了自主研制的硅酸乙脂涂层与几种常用吸收涂层对304不锈钢的硬度和表面残余应力等冲击力学性能的影响。结果表明,在激光冲击过程中,黑漆涂层、铝箔涂层和硅酸乙脂黑漆涂层都能有效提高激光冲击试样的表面硬度,激光连续冲击后,在304不锈钢试件表面能形成1mm厚的硬化层,其表面硬度最大到240HV;随着激光功率密度的增强,其表面硬度逐渐增强;其表面残余应力也随着激光功率密度的增加而逐渐增大。Three different ablative, sacrificial coatings of black paint, aluminum foil and silica acid black paint were chosen to protect SUS304 metal from surface melting during laser pulse, which adversely affects surface hardness and residual stresses. The depth of hardened lager by laser processing is up to 1mm. The hardness of the surface layer increases by the laser processing, and the surface hardness reaches 240HV, with increasing of the laser power density, the surface hardness and surface compressive residual stress of the layers increase as well.

关 键 词：激光冲击 304不锈钢 力学性能 

分 类 号：TN249[电子电信—物理电子学] TG142.71[一般工业技术—材料科学与工程]