Mo对TiC/316L不锈钢复合材料组织和性能的影响  

Effect of Mo on microstructure and properties of TiC/316L stainless steel composites

作　　者：蔺绍江[1,2] 熊惟皓[1] 黄玉柱[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074 [2]黄石理工学院机电工程学院,黄石435003

出　　处：《粉末冶金材料科学与工程》2011年第5期716-722,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家高技术研究发展计划(863计划)资助项目(2007AA03Z115);湖北省重点学科"机械电子工程"资助项目

摘　　要：为了提高TiC/316L不锈钢复合材料的力学性能,在TiC/316L复合粉末中添加不同质量分数的Mo元素,采用粉末冶金法制备TiC/316L不锈钢复合材料。通过对复合材料的显微组织分析,拉伸、摩擦磨损等力学性能的测试,研究Mo含量对复合材料的组织和性能的影响。结果表明,Mo的添加有利于复合材料的组织均匀化,从而提高复合材料的拉伸力学性能;然而过高的Mo含量,会导致复合材料在烧结过程中晶界的过分熔化,影响复合材料力学性能的提高。当Mo的质量分数为2%时,复合材料具有较好的拉伸性能。同时,Mo的添加可提高复合材料的致密化程度和界面结合强度,TiC颗粒可以起到有效的承载作用,复合材料的耐磨性能得以提高。In order to improve the mechanical properties of TiC/316L stainless steel composites material,the element of Mo was added into the TiC/316L composite powders to prepare the TiC/316L stainless steel composite material by powder metallurgy method.The effect of Mo content on the microstructure and properties of composite material was studied by optical micrograph analysis,tensile and wear properties measurement.The results show that the addition of Mo is beneficial to improve the homogenization of microstructure of the composite material sintered,and improve the tensile properties of the composite material.However,too high Mo content results in worse plastic properties and lower tensile strength of the composites because of grain boundary melting.The optimal content is 2% Mo and at this case,the material with a higher tensile strength can be obtained.Moreover,the addition of Mo is beneficial to improve the densification of the composite material,and the wear resistance of composites could been appreciably enhanced because TiC particles can effectively provides wear protection or resistance during wear sliding because of good interfacial bonding.

关 键 词：MO 复合材料 性能 

分 类 号：TB331[一般工业技术—材料科学与工程]