摘要
试验中激光热处理的活塞表面硬度可达HRC58,使用寿命提高1.5倍以上。文中探讨了工艺条件,初步分析了激光热处理的硬化机理,认为晶粒细化、马氏体高密度位错和固溶含碳量是获得超高硬度的主要原因。
In experiment,a piston ring shows a surface hardness up to HRC750 and a service life over 1.5 fold after laser heat treatment. A study is made on its technology and condition and an initial analysis is given to the mechanism of hardening,the authors believe that the ultrahigh hardness is chiefly due to the pulverization of crystal grains,the high-lying dislocation density of martensites,and the content of carbon in solid solution.
出处
《机电工程技术》
2005年第2期89-91,共3页
Mechanical & Electrical Engineering Technology
基金
广州市重大科技攻关项目(2000-Z-009-01)
关键词
激光热处理
工艺
硬化机理
laser heat treatment
technology
mechanism of hardness
