大功率半导体激光相变硬化U74轨钢的试验  

High power diode laser transformation hardening on U74 rail steel

作　　者：苏国强[1] 王智勇[1] 曹银花[1] 丁鹏[1] 虎跃[1] 李娜[1] 左铁钏[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100022

出　　处：《金属热处理》2008年第2期44-47,共4页Heat Treatment of Metals

基　　金：科技部国际合作项目(2002AADF3101);国家自然科学基金(60407009);北京市自然科学基金(4042007)

摘　　要：使用自制的大功率半导体激光器对U74轨钢进行了相变硬化。结果表明，硬化层硬度值可以达到800～900HV0．01，是基体硬度的3～4倍，沿半导体激光器光斑的不同轴向扫描对硬化层有很大影响，沿慢轴方向扫描得到的硬化层深度要远高于快轴方向，硬度值沿深度方向在过渡区附近迅速下降至基体硬度。试验表明，大功率半导体激光器在材料表面处理领域有着较为广阔的应用前景。Laser transformation hardening was carried out on U74 rail steel by a self-developed high power diode laser. The results show that the hardness of the hardened layer of the steel can reach 800 -900 HV0.01, and is 3 -4 times of the substrate steel＇s. In addition,it is quite differences between the hardened layers scanned along fast beam axis and slow beam axis, the hardened layer is deeper when scanned along slow beam axis direction, but the hardness falls down rapidly in the transition zone. Overall, the high power diode laser is more competitive for surface hardening in laser processing field.

关 键 词：大功率半导体激光器 相变硬化 U74轨钢 

分 类 号：TG156.99[金属学及工艺—热处理]