引用本文:于鹤龙,魏敏,张梦清,王红美,宋占永,张伟.感应熔覆原位TiC/Ti复合涂层的结构特征与纳米力学性能[J].中国表面工程,2018,31(5):150~158
YU Helong,WEI Min,ZHANG Mengqing,WANG Hongmei,SONG Zhanyong,ZHANG Wei.Microstructure Characteristics and Nano Mechanical Properties of In-situ TiC/Ti Composite Coating by Induction Cladding[J].China Surface Engineering,2018,31(5):150~158
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感应熔覆原位TiC/Ti复合涂层的结构特征与纳米力学性能
于鹤龙1, 魏敏2,3, 张梦清1, 王红美1, 宋占永1, 张伟2,3
1.陆军装甲兵学院 装备再制造技术国防科技重点实验室, 北京 100072;2.京津冀再制造产业技术研究院, 河间 062450;3.北京睿曼科技有限公司, 北京 100043
摘要:
以钛和石墨为原料，采用预置粉末结合高频感应加热熔化的方法在Ti6Al4V基体表面制备了原位自生TiC增强Ti基复合涂层，研究了涂层微观结构、物相构成、纳米力学性能及显微硬度。结果表明，感应熔覆钛基复合涂层表面平整，内部无裂纹和孔隙，与基体形成了冶金结合；熔覆过程中Ti与石墨充分反应生成TiC增强相，涂层基质相由α-Ti和少量β-Ti构成；TiC在涂层内分布均匀，其纳米压痕硬度和弹性模量高达22和280 GPa，较Ti6Al4V基体分别提高18和130 GPa，因此使复合涂层具有较高的硬度。
关键词:  TiC  原位合成  钛基复合涂层  感应熔覆
DOI：10.11933/j.issn.1007-9289.20180329002
分类号:TG174.44
基金项目:国家重点研发计划（2017YFB0310703，2017YFF0207905）
Microstructure Characteristics and Nano Mechanical Properties of In-situ TiC/Ti Composite Coating by Induction Cladding
YU Helong1, WEI Min2,3, ZHANG Mengqing1, WANG Hongmei1, SONG Zhanyong1, ZHANG Wei2,3
1.National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China;2.Institute of Remanufacturing Industry Technology, Jing-jin-ji, Hejian 062450, China;3.Beijing Ruiman Technology Co. Ltd., Beijing 100043, China
Abstract:
Induction cladding TiC/Ti composite coating was in-situ synthesized by induction heating the preplaced powder mixture of Ti and graphite on a Ti6Al4V substrate. The microstructure, phase composition, nano mechanical properties and microhardness of the coating were studied. Results show that the composite coating exhibits a smooth surface and a dense microstructure without cracks and pores. A metallurgical adherence is formed between the coating and the substrate. The graphite fully reacts with Ti to produce TiC reinforcement particles during the induction cladding process. The coating matrix is formed by the β-Ti and the equiaxed α-Ti phase. Fine titanium carbides are uniformly distributed in the coating. The nanoindentation hardness and modulus of the TiC particles are about 22 and 280 GPa, respectively, which increase the microhardness of the composite coating.
Key words:  TiC  in-situ synthesis  Ti matrix composite coating  induction cladding
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