工艺参数对马氏体不锈钢激光冲击区表面轮廓的影响  

The Effects of Surface Profile in Laser Shock Zone for Martensite Stainless Steel

作　　者：曹子文[1] 邹世坤[1] 但丽玲 

机构地区：[1]高能束流国防科技重点实验室北京航空制造工程研究所,北京100024 [2]贵州黎阳航空发动机公司,贵州贵阳561102

出　　处：《应用激光》2008年第4期278-281,共4页Applied Laser

摘　　要：激光功率密度和搭接率对马氏体不锈钢的激光冲击区的表面轮廓有较大影响。激光功率密度从3.79 GW/cm2到7.25GW/cm2,冲击区塑性变形程度随功率密度增大而增大,当激光功率密度为6.09 GW/cm2时,冲击区塑性变形程度适中,其残余应力平均值达-569.1 MPa。搭接率试验结果表明,搭接率为33%时,可获得较大面积无挤出的激光冲击区,无挤出区域的塑性均匀,变形深度波动幅度在2μm以内,而且此搭接率下冲击区挤出面积较小,分布具有规律,便于再次冲击以降低冲击区的表面波纹度。Laser power density and overlap ratio had a dramatic influence of surface profile of laser shock zone for martensite stainless steel. The plastic deformation inside laser shock zone was increased when laser power density rised from 3.79 GW/ cm^2 to 7.25 GW/cm^2. Considering this technics research applied to thin-case workpiece, a moderate plastic deformation was gained by laser power density 6.09 GW/cm^2 , and the residual stress reached to -569. 1 MPa. The large area laser shock zone without extrusion was formed with overlap ratio of 33%, and the depth of shock zone fluctuated within 2 um, and there was a very small extrusion area with regular distribution to be convenient for secondary laser shock to extrusion area.

关 键 词：激光冲击处理 激光喷丸 马氏体不锈钢 表面轮廓 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TB34[金属学及工艺—金属材料]