高能球磨对等离子控制原位合成TiC/Ni熔覆层的影响  

Effects of High Energy Ball Milling on In-Situ Synthesis of TiC/Ni Layer Contolled by Plasma Cladding

作　　者：胡俊华[1] 吴玉萍[1] 曹明[1] 林萍华[1] 

机构地区：[1]河海大学材料科学与工程学院,江苏南京210098

出　　处：《金属热处理》2007年第11期30-33,共4页Heat Treatment of Metals

基　　金：江苏省自然基金项目(BK2007180)

摘　　要：以Ti粉和活性炭粉作为原始粉末在行星式球磨机上进行高能球磨,采用等离子熔覆技术分别将经高能球磨活化的和未球磨活化(Ti+C)的预涂粉末,在45钢表面分别原位合成了TiC/Ni复合熔覆层;对熔覆粉末的组织、界面特征及相组成进行了分析,并对熔覆层的性能进行了测试。结果表明,经高能球磨活化后,Ti+C粉末得到了细化和均匀化,增加了钛粉和石墨之间的接触面积;经活化后的熔覆层中的TiC增多,熔覆层的硬度提高到630HV0.2。Titanium（Ti） and graphite（Gr） original powders were milled by planetary ball milling machine and acted as cladding powders.TiC/Ni composite coating,by using milled Ti＋C powders and original powders respectively,was in-situ synthesized on 45 steel controlled by plasma cladding technology.The microstructures and interface characteristics of the coating and the ball milled powders were researched.The results show that the grain size of Ti＋C powder is decreased and the distribution uniformity of the Ti＋C is improved obviously after high energy ball milling.Meanwhile,the contact area og Ti＋C powder is increased.Along with the increase of the TiC content in the coating,the coating hardness is up to 630 HV0.2.

关 键 词：高能球磨 原位合成 碳化钛 等离子熔覆 

分 类 号：TF123.7[冶金工程—粉末冶金]