载荷对钢基自生复合材料高速磨损性能的影响  

Effects of Loading on High Speed Wear Properties of In-situ Steel Matrix Composites

作　　者：胡昌旭[1] 宋延沛[1] 郭庆福[1] 段青辰 魏永辉[1] 

机构地区：[1]河南科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第6期466-468,共3页Special Casting & Nonferrous Alloys

基　　金：河南省教育基金项目(20014300013);河南科技大学SRTP项目(200610038)

摘　　要：采用铸造的方法制备了钢基自生复合材料,并通过MMS-1G高速销盘摩擦磨损试验机、扫描电镜和能谱仪,研究了钢基自生复合材料的微观组织和载荷对该复合材料高速磨损性能的影响。结果表明,制备的复合材料中自生碳化物颗粒细小、圆整、分布均匀,自生碳化物体积分数可达到31%左右。在40m/s的滑动速度下,钢基自生复合材料的磨损率随载荷的提高而增大,当载荷从50N增加至150N时,该复合材料的磨损率也由0.99×10-6g/m增加到4.2×10-6g/m,复合材料的摩擦因数则随载荷增加而降低。对自生复合材料的磨损机理进行了探讨。In-situ steel matrix composites were fabricated by a casting method.The microstructure and effects of loading on high speed wear behavior of in-situ steel matrix composites were investigated by MMS-1G high speed disc wearing tester,SEM and EDS.The results indicate that the in-situ steel matrix composites with uniformly distributed fine and round in-situ carbide particles that can reach up to about 31% in volumetric fraction can be prepared successfully.The wearing rate of the composites is increased from 0.99×10-6 g/m to 4.2×10-6 g/m with the increase of loading from 50 N to 150 N at 40 m/s,however,the frictional coefficient of the composites is decreased with increasing in loading.Finally,the wear mechanism of the in-situ steel matrix composites was approached.

关 键 词：钢基自生复合材料 微观组织 高速干滑动磨损 磨损特性 

分 类 号：TB331[一般工业技术—材料科学与工程]