摘要
通过焊条电弧堆焊的方式形成高碳高铬(Fe-Cr-C)耐磨合金堆焊层,分析不同碳含量对堆焊层组织、硬质相及耐磨性能的影响。结果表明:堆焊金属的组织主要为M+A+C共+C初,初生碳化物类型为M7C3;随着碳含量的增加,初生碳化物的含量增加,且其生长方向趋于垂直于母材表面;堆焊层硬度随碳含量的增加而增加,但耐磨性在碳含量达一定程度(w(C)>5.6%)时反而降低。
Fe-Cr-C hardfacing alloy prepared by shielded metal arc welding（SMAW ）, was studied by analyzing the influence of carbon content on microstructure, hard phase and wear performance. The results indicate that the microstructure of the deposited metal consists of martensite, austenite and carbides（primary carbide and eutectic carbide）, and the type of primary carbide is M7C3. The content of primary carbide increases as the carbon content in deposited metals increases,and their growth direction tends to be perpendicular to the base metal. The hardness of deposited metals increases along with the increase of carbon content. However, its wear resistance does not completely accord with the tendency of hardness. It decreases after the carbon content reaches up to about 5.6%.
出处
《电焊机》
2016年第9期20-23,共4页
Electric Welding Machine
基金
四川省教育厅重点项目(13ZA0030)
汽车高性能材料及成形技术四川省高校重点实验室开放基金(szjj2015-090)
2015省级大学生创新创业训练计划(201510623002)
关键词
碳含量
碳化物
显微组织
硬度
耐磨性
carbon content
carbides
microstructure
hardness
wear performance
