标题：MICRO-STRUCTURES OF HARD COATINGS DEPOSITED ON TITANIUM ALLOYS BY LASER ALLOYING TECHNIQUE
作者：Li Wei; Yu Huijun; Chen Chuanzhong; Wang Diangang; Weng Fei
作者机构：[Li Wei; Chen Chuanzhong; Wang Diangang; Weng Fei] Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jina 更多
通讯作者地址：[Chen, CZ]Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China.
来源：SURFACE REVIEW AND LETTERS
关键词：Laser alloying technique; surfaces; titanium alloys
摘要：This work is based on micro-structural performance of the Ti-B4C-C laser alloying coatings on Ti-6Al-4V titanium alloy. The test results indicated that laser alloying of the Ti-B4C-C pre-placed powders on the Ti-6Al-4V alloy substrate can form the ceramics reinforced hard alloying coatings, which increased the micro-hardness and wear resistance of substrate. The test result also indicated that the TiB phase was produced in alloying coating, which corresponded to its (101) crystal plane. In addition, yttria has a refining effect on micro-structures of the laser alloying coating, and its refinement mechanism was analyzed. This research provided essential experimental and theoretical basis to promote the applications of the laser alloying technique in manufacturing and repairing of the aerospace parts.