等离子束表面冶金铜铝金属间化合物涂层的研究  

Study on Cu-Al Inter-metallic Compound Coating by Plasma Beam Surface Metallurgy

作　　者：于洪爱[1] 李惠琪[1] 孙玉宗[1] 王大陆 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266510 [2]青岛钢铁有限公司中心实验室,山东青岛266043

出　　处：《山东科技大学学报（自然科学版）》2006年第2期43-46,共4页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：山东省自然科学基金项目(Y2002F12);山东省优秀青年科学家科研奖励基金项目(02BS057)

摘　　要：利用铜铝有一定互溶性并可生成金属间化合物的特点,采用等离子束表面冶金技术,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复合金属间化合物冶金层。借助OM、SEM、EDAX及XRD对试样显微组织进行分析,并测试了其显微硬度。结果表明：等离子束表面冶金快速凝固过程中,形成了Al_2Cu金属间化合物及α(Al)固溶体。铜铝金属间化合物冶金层的组织具有快速凝固组织特征,冶金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。冶金层与基体间具有良好的冶金结合。冶金层的最高硬度为260HV,较铝基材的硬度(74．5HV)有显著提高。In the paper, an inter-metallic compound coating bonded well is successfully deposited on the surface of Al by plasma beam surface metallurgy on the basis of good mutual solubility of Cu and Al. The commercially pure Al is used as a substrate and the pure Cu powders are metallurgical material for the plasma beam surface metallurgical process. Microstructure and micro-hardness properties of the metallurgical coating are studied with the help of OM, SEM, EDAX and XRD. The results show that during rapid freezing of the plasma beam surface metallurgical process, inter-metallic compound of Al2Cu and Al solid solution are separated out from the liquid. Optical microscope observation demonstrated that the microstructures of the inter-metallic compound coating are rapid, non-equilibrium freezing structures： the bottom of the metallurgical coating is coarse dendrite microstructure against the heat and in the upper area is nearly uniform fine dendrite and cellular. The coating has high micro-hardness of 260HV, which greatly improved the surface hardness of the Al （74.5HV）.

关 键 词：等离子束 表面冶金 铝 金属间化合物 快速凝固 

分 类 号：TG174.4[金属学及工艺—金属表面处理]