等离子束表面冶金Al_2Cu和-αAl复合涂层研究  

Study on Al_2Cu/α-Al ceramal composite coating prepared by plasma jet surface metallurgy

作　　者：刘均波[1] 王立梅[2] 李惠琪[3] 于洪爱[4] 

机构地区：[1]潍坊学院机电系,山东潍坊261061 [2]潍坊学院信控系,山东潍坊261061 [3]北京科技大学材料学院,北京100083 [4]山东科技大学材料学院,山东青岛266510

出　　处：《材料热处理学报》2007年第5期134-137,共4页Transactions of Materials and Heat Treatment

基　　金：河南杰出人才创新基金资助项目(0421001000)

摘　　要：采用等离子柬表面冶金技术，以纯铝为基材，纯铜粉末为冶金原料，在铝表面制得了冶金结合良好的Al2Cu和α—Al复合涂层。涂层组织具有快速凝固组织特征，涂层底部为逆热流方向长大的粗大枝晶，上部为细小枝晶和大胞晶均匀分布。涂层最高硬度为260HV，较铝基材的硬度（74．5HV）有显著提高，在油润滑滚动磨损试验条件下纯铝的磨损量是涂层的6～10倍，说明涂层具有优异的耐磨性和载荷特性。The Al2Cu/α-Al composite coating was prepared on pure AI with Cu powders by plasma jet surface metallurgy technique. The microstructure and mechanical properties of the coating were observed and examined by optical microscope, SEM, hardness measurement and wear test. The results show that microstructure of the coating consists of coarse dendrite grows up against heat flow at the bottom and fine dendrite uniformly distributed in the upper. The coating has higher microhardness of 260HV than the hardness （74.5HV） of AI. The coating exhibits excellent wear resistance in the rolling wear test with oil as the lubricant. The mass loss of pure aluminium is 6 - 7 times of that of the composite coating in the process of the wear tests.

关 键 词：等离子柬 表面冶金 复合涂层 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG113[金属学及工艺—金属学]