激光功率对船用10CrNiMnMOV钢表面处理后组织的影响  

Influence of Different Laser Power on Microstructure for Laser-remelted of 10CrNiMnMoV Steel

作　　者：张培磊[1] 张景 丁敏[1] 姚成武[1] 姚舜[1] 

机构地区：[1]上海交通大学上海市激光制造与材料改性重点实验室,上海200240 [2]扬州中集通华专用车有限公司,江苏扬州225009

出　　处：《表面技术》2009年第2期1-3,共3页Surface Technology

基　　金：国家科技部国际科技合作项目(2006DFB52680);上海市科委国际合作项目(061107030)

摘　　要：为扩大船用NbV微合金化10CrNiMnMoV钢的应用范围,改善其表面性能(主要是提高其耐磨性),利用高功率CO2激光对其进行了表面熔凝处理,研究了不同激光功率对其组织的影响。结果表明:随激光功率的增加,熔凝区形成的组织分别为细小马氏体和铁素体以及极少量的粒状贝氏体(3.5kW)、板条马氏体和马氏体间的少量铁素体(4kW和4.5kW)、板条马氏体组织(5kW)。热影响区上部主要形成了细小的马氏体组织,下部的组织主要是铁素体、珠光体、少量马氏体和粒状贝氏体及细小碳化物。For enlarging the using scope of 10CrNiMnMoV steel with micro alloying by Nb and V and improving the performance on surface, the steel was surface remelted with high power CO2 laser. The influence of difference power on microstructure was studied. The microstructure is martensite, ferrite and a small amount of granular bainite when the laser power is 3.5kW. The microstructure is lath martensite and a little ferrite between martensites when the laser power is 4kW and 4.5kW. The microstructure is all the lath martensite when the laser power is 5kW. The exiguous martensite appears in the upper part of heat affected zone （UPHAZ） and the ferrite, perlite, martensite, granular bainite and carbide appears in the bottom of HAZ.

关 键 词：激光熔凝 表面改性 显微组织 结构钢 

分 类 号：TG156.99[金属学及工艺—热处理]