改善零件疲劳寿命的激光冲击强化技术  

A Technology of Laser Shot Processing Strengthening to Improve Fatigue Life of Components

作　　者：张兴权[1] 周建忠[1] 杨泽腾[1] 王广龙[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《汽轮机技术》2005年第3期238-240,共3页Turbine Technology

基　　金：国家自然科学基金(No.50475127);江苏省自然科学基金(No.BK2004063);国家教育部重点科技基金(No.204052)

摘　　要：喷丸强化在工业界已得到广泛的应用,而激光冲击强化处理是最近几年来出现的表面改性新工艺。它利用激光冲击波技术使零件表层材料的亚结构得到改善和产生有益残余压应力,因此降低了生成疲劳裂纹源的比例和增加抗应力腐蚀的能力,从而延长零件的疲劳使用寿命。同传统的机械喷丸强化相比,激光冲击强化具有更大的优势。Shot peening is widely used in industry, while laser shot processing is a emerging modern process in metal part surface modification. It can improve the micro-structures of material and impress residual compressive stress into surfaces of metal work piece by laser shock waves, reduce the rate of fatigue cracking and stress corrosion cracking in structure metal needed for its applications, so this treatment extends the fatigue lifetime. Compared to traditional shot peening, it has more superiorities.

关 键 词：激光冲击 残余压应力 疲劳寿命 

分 类 号：TN249[电子电信—物理电子学]