Microstructure and Tribological Properties of In-situ Synthesized TiB2- TiC/Ni Based Composite Coating by Laser Cladding
来源期刊：材料热处理学报2004年第5期
论文作者：SUN Rong-lu YANG Xian-jin TANG Ying
关键词：Laser cladding; In-situ synthesis; Composite coating; Microsttucture; Friction and wear property;
摘 要：ATiB2 and TiC particles reinforced Ni based composites coating was prepared on TC4 alloy surface by chemical reaction among Ti, B and C elements using laser cladding technique. Microstructural analysis showed that the sizes of in-situ synthesized TiB2 and TiC particles ranged within 5～10μm and 1～2μn, respectively, while both the two kinds of particles were uniformly distributed in the clad layer. The measurement of microhardness and wear and friction properties indicated that the microhardness of laser clad layer was HV900～1100, being three times of that of the TC4 alloy; the friction coefficient of the laser clad layer in air and in vacuum (10-5 Pa) ranged within 0.2～0.3 and 0.3～0.5, respectively; the wear rate in terms of mass loss was considerably lower than that of the TC4 alloy both in air and in vacuum environment.
SUN Rong-lu1，YANG Xian-jin2，TANG Ying1
(1.Laser Technology Institute of Tianjin Polytechnic University, Tianjin, China;
2.Materials Science and Engineering School of Tianjin University, Tianjin, China)
摘要:ATiB2 and TiC particles reinforced Ni based composites coating was prepared on TC4 alloy surface by chemical reaction among Ti, B and C elements using laser cladding technique. Microstructural analysis showed that the sizes of in-situ synthesized TiB2 and TiC particles ranged within 5～10μm and 1～2μn, respectively, while both the two kinds of particles were uniformly distributed in the clad layer. The measurement of microhardness and wear and friction properties indicated that the microhardness of laser clad layer was HV900～1100, being three times of that of the TC4 alloy; the friction coefficient of the laser clad layer in air and in vacuum (10-5 Pa) ranged within 0.2～0.3 and 0.3～0.5, respectively; the wear rate in terms of mass loss was considerably lower than that of the TC4 alloy both in air and in vacuum environment.
关键词:Laser cladding; In-situ synthesis; Composite coating; Microsttucture; Friction and wear property;
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