等离子弧喷焊铁基合金组织与力学性能  

Research on microstructure and mechanical properties of iron-base alloy with plasma arc spray welding

作　　者：蹤雪梅[1] 李稳[1] 马国[1] 申雷明[1] 信若飞 陈理想 

机构地区：[1]徐工集团江苏徐州工程机械研究院,江苏徐州221004 [2]徐州重型机械有限公司,江苏徐州221004 [3]徐州徐工基础工程机械有限公司,江苏徐州221004

出　　处：《电焊机》2015年第12期45-49,共5页Electric Welding Machine

摘　　要：采用F410、F316和F250三种铁基合金粉末,利用等离子弧喷焊技术在ZG310-570铸钢基体表面制备铁基喷焊层。使用火花直读光谱仪测定喷焊层成分,通过金相显微镜观察组织,使用布氏硬度计测定喷焊层硬度,使用摆锤式冲击试验机分析堆焊层的韧性。结果表明,三种粉末喷焊层均由胞状或块状的奥氏体和共晶硼化物组成,共晶硼化物分布在晶界上并连接成网状,F316粉末等离子弧喷焊所获得的喷焊层硬度和韧性均优于基体和其他两种粉末。Using three kinds of iron-base powders,as F410,F316 and F250, spray welding layers are prepared on the surface of ZG310-570 by the means of plasma spray welding.The chemical components,mierostructure,hardness and impact toughness of spray welding layers are analyzed by optical emission spectrometer,optical microscope,brinell hardness tester and charpy impact machine. The results show that spray welding layers of three kinds of powders contain cell or granular austenite and eutectic boride.The eutectic borides distribute continuously in the grain boundaries.The spray welding layer of F316 alloy power surpasses both base metal and another two kinds of powers in hardness and toughness.

关 键 词：等离子弧喷焊 ZG310-570 组织 力学性能 

分 类 号：TG456.2[金属学及工艺—焊接]