反应等离子熔敷Cr_7C_3/γ-Fe金属陶瓷复合材料涂层组织与耐磨性  

MICROSTRUCTURE AND WEAR RESISTANCE OF THE REACTIVE PLASMA CLAD Cr_7C_3/γ-Fe CERAMAL COMPOSITE COATING

作　　者：刘均波[1] 黄继华[2] 王立梅[3] 

机构地区：[1]潍坊学院机电工程系,261041 [2]北京科技大学材料学院,100083 [3]潍坊学院实验室与设备管理处,261041

出　　处：《焊接》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)

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.

关 键 词：反应等离子熔敷 金属陶瓷 复合材料涂层 显微组织 耐磨性 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TQ174.758[金属学及工艺—金属学]