摘要
以Fe-Cr-C合金粉末为原料,采用优化的等离子熔敷工艺,在C级钢表面通过粉末反应制得由原位生成的新型Cr7C3/γ-Fe金属陶瓷复合材料涂层。并测试分析了涂层的显微组织和显微硬度分布,以及在室温干滑动试验条件下的耐磨性。结果表明,该涂层组织由规则块状初生相Cr7C3和γ-Fe奥氏体固溶体组成,与基材完全冶金结合,涂层厚度约1.5 mm,具有较高的显微硬度(平均为870 HV),且硬度梯度分布合理;涂层在室温干滑动试验条件下具有优异的耐摩擦磨损性能。
A new type in- situ Cr7C3/γ- Fecramal composite coating was fabricated on C degree steel by the reactive plasma clad tcchnology with the Fe- Cr- C alloy powdcrs. The microstructurc, nficrohardness and dry sliding wear resistance of the coating were analyzed. The tesults indicated that the coating was composed of hlocky primary Cr7 C3 and γ - Fe solid solution and had the metallurgical bonding with the C degree steel substratc. The coating was 1.5 mm thick, which had high hardness and excellent wear resistanec nndcr the dry sliding condition.
出处
《焊接》
北大核心
2005年第11期49-52,共4页
Welding & Joining
基金
河南省杰出人才创新基金资助项目(0421001000)
