中国激光, 2017, 44 (11): 1102007, 网络出版: 2017-11-17
激光熔化沉积TC4-Cu双相涂层的结构与性能 下载: 817次
Microstructure and Properties of TC4-Cu Duplex Coating Prepared by Laser Melting Deposition
激光技术 激光熔化沉积 TC4合金 显微组织 硬度 电化学腐蚀 laser technique laser melting deposition TC4 alloy microstructure hardness electrochemical corrosion
摘要
基于激光熔化沉积技术, 采用A3钢作为基材, 铜合金作为过渡层, TC4合金作为涂层, 制备了TC4-Cu双相涂层, 并对涂层界面的组织、化学成分和组成相进行了分析, 同时, 对涂层的硬度和耐蚀性能进行了测试。结果表明, TC4-Cu-Fe界面发生了原子相互扩散, 界面处形成了α-Fe、α-Ti等固溶体, 结合区组织细小, 过渡层成功阻碍了Ti原子向Cu-Fe界面的扩散; TC4-Cu双相涂层的平均显微硬度约为500 HV, 约为基材的3倍; TC4-Cu双相涂层的耐蚀性能略高于商用TC4合金的, 远高于A3钢的。
Abstract
Based on the laser melting deposition technique, the TC4-Cu duplex coating is prepared with A3 steel as the matrix, copper alloy as the transition layer and TC4 alloy as the coating. The interface structure, chemical compositions and phase compositions are analyzed. Meanwhile, the microhardness and the corrosion resistance of this coating are tested. The results show that the atom diffusion occurs at the TC4-Cu-Fe interfaces. Solid solutions, like α-Fe and α-Ti, are formed at the interfaces. The grains in the binding area have small sizes. The Ti diffusion to the Cu-Fe interface is blocked by the transition layer successfully. The average microhardness of the coating is about 500 HV, which is about 3 times of that of the matrix. The corrosion resistance of the TC4-Cu duplex coating is slightly higher than that of the commercial TC4 alloy, and far higher than that of A3 steel.
廖帮全, 徐亮, 周圣丰, 杨光, 尚纯, 雷剑波. 激光熔化沉积TC4-Cu双相涂层的结构与性能[J]. 中国激光, 2017, 44(11): 1102007. Liao Bangquan, Xu Liang, Zhou Shengfeng, Yang Guang, Shang Chun, Lei Jianbo. Microstructure and Properties of TC4-Cu Duplex Coating Prepared by Laser Melting Deposition[J]. Chinese Journal of Lasers, 2017, 44(11): 1102007.