激光冲击提高45钢疲劳寿命的研究  

Study of Laser Shock Processing for Increasing Fatigue Life of 45 Steel

作　　者：戴希敏[1] 任乃飞[1] 张永康[1] 高传玉[2] 蔡兰 郭大浩[2] 吴鸿兴[2] 

机构地区：[1]江苏理工大学,镇江212013 [2]中国科学技术大学强激光实验室,合肥230000

出　　处：《应用激光》1998年第6期268-270,244,共4页Applied Laser

基　　金：机械工业部教育司科技基金!96250913

摘　　要：激光冲击45钢的表面硬度提高了大约32％，硬化层深度约为100μm，在离表层大约30～40μm处硬度达到最大，平均疲劳寿命提高了60％左右，在置信度为95％时，激光冲击强化试件的中值疲劳寿命是未冲击试件的1.11～2.133倍。Strengthened effect of laser shock-processing(LSP) for 45 steel is studied. The experimental results show: LSP can make the surface hardness of 45 steel increase by 32% or so. The depth of hardened layer of LSP 45 steel is 100μm. The hardness value comes up to the maximum in the 30～40μm away from the specimens surface. Fatigue life of 45 steel after LSP increases by 60%. With 95% confidence, the fatigue life of LSP specimens is 1. 11～2. 133 times larger than the unprocessed specimens.

关 键 词：激光冲击强化 45钢 疲劳寿命 硬化层 

分 类 号：TG115.5[金属学及工艺—物理冶金] TG142[金属学及工艺—金属学]