激光熔敷技术在排气门和模具上的应用研究  

Application of Laser Cladding Technology on Exhaust Valves and Hot Working Dies

作　　者：王顺兴[1] 田保红[1] 李全安[1] 李春华[2] 朱蕴策[3] 魏震 

机构地区：[1]洛阳工学院材料工程系 [2]北京机电研究所 [3]东风汽车公司工艺研究所 [4]洛阳金冕实业总公司

出　　处：《中国表面工程》2000年第4期41-43,共3页China Surface Engineering

基　　金：机械工业部技术发展基金!资助项目(95JA0503)

摘　　要：研究了在21-4N钢表面激光熔敷Ni基合金和Ni基合金中再加入WC和稀土氧化物CeO2熔敷层的摩擦磨损性能和高温冲击磨损性能，并对汽车排气门和滚动轴承套圈热冲模进行了激光熔敷处理和装机试验。结果表明，在排气门上激光熔敷Ni21合金，热冲模上激光熔敷Ni60+20%WC+0.5% CeO2能显著提高它们的使用寿命。Tribological and impact wear properties at elevated temperature of the coatings made by laser remelting nickel-based alloy and alloy with tungsten carbide and rare earth oxide on 21-4N valve steel were investigated respectively. These nickel-base coatings on exhaust valves of automobile and hot working dies of ball bearings were evaluated in field-tests. The results showed that laser remelted Ni21 alloy coating for exhaust valves and Ni60+20%WC+0.5%CeO2 composite coating for hot working dies can prolong their service life markedly.

关 键 词：激光熔敷 摩擦磨损 冲击磨损 排气门 模具 汽车 

分 类 号：U464.134.3[机械工程—车辆工程] TG76[交通运输工程—载运工具运用工程]