激光控制反应合成的实验研究  

Study of Laser Controlled Reactive Synthesis and Cladding

作　　者：姚健奎[1] 李言祥[1] 宋晋生[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《应用激光》2002年第2期113-118,共6页Applied Laser

基　　金：清华大学985基金;机械工程学院基础研究基金

摘　　要：本文把表面工程领域两种先进技术——燃烧合成涂层技术和激光表面熔覆技术结合起来进行研究,旨在使这两种表面处理技术优势互补,获得一种新的表面处理技术——激光控制反应合成表面熔覆技术。在结合实验的基础上,研究了在铝热自蔓延反应2Al+Fe_2O_3=2Fe+Al_2O_3的反应物中添加合适的稀释剂,使此体系无法自蔓延,再通过激光能量的输入来诱发和控制反应合成,从而实现在钢板表面的激光陶瓷熔覆。The two new techniques in the surface engineering area, combustion synthesis coating and laser surface cladding were combined in this research. The goal was to develop a novel surface treatment technique---laser controlled reactive synthesis cladding, to integrate the advantages of the above two techniques, Al and Fe2O3 powders for the highly exothermic reaction:2Al + Fe2O3 = Fe+ Al2O3 was used as the basic reacting reactants. SHS process was prevented. The laser cladding processes were experimented by laser static illuminating on pressed samples and single track cladding on the steel substrate, respectively. The optimum ratio of powder mixture and suitable processing parameters were obtained.

关 键 词：燃烧合成 激光表面熔覆 铝热反应 反应合成 表面处理技术 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]