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王艳,何芹,徐强,熊中.TA1纯钛表面镍基喷焊层的组织和磨损性能[J].稀有金属材料与工程(英文),2018,47(3):910~914.[Wang Yan,He Qin,Xu Qiang and Xiong ZHong.Microstructure and wear properties of Ni-based spray-welding layer on pure titanium TA1 surface[J].Rare Metal Materials and Engineering,2018,47(3):910~914.]
Microstructure and wear properties of Ni-based spray-welding layer on pure titanium TA1 surface
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Received:February 29, 2016  Revised:April 25, 2016
DOI:
Key words: Plasma spray-welding  TA1  Ni-based spray-welding coating  Microstructure  Tribological properties
Foundation item:四川省教育厅重点项目(13ZA0030)、汽车高性能材料及成形技术四川省高校重点实验室开放基金(szjj2015-090)和西华大学重点科研基金(z1220114)资助
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Wang Yan,He Qin,Xu Qiang and Xiong ZHong  
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Abstract:
      The Ni-based wear resistance coating on pure titanium TA1 substrate by plasma spray-welding method has been prepared. The interface morphology, microstructure, the microhardness of the coating and its tribological properties have been studied. The results show that the coating is composed of transition layer and strengthening layer, and a metallurgical bonding interface based on atomic diffusion and a transition layer mainly composed of dentrite are formed between the coating and substrate. The phases of the coating mainly compose of γ-Ni andγ-Ni(Ti) and hard particles such as TiC、Cr7C3、Ni3B and TiB2 and so on. Strengthening layer is characterized by a wear resistance microstructure composed of tough Ni matrix and hard particles, the micro-hardness is between 830~907HV, which is 700HV higher than that of the substrate. The element distribution and the microstructure, micro-hardness of coating in the cross section change continuously and gradually along depth direction. Compared with TA1 substrate, the friction coefficient of Ni-based spray-welding coating decreases, the wear resistance has been obviously enhanced and spray-welding coating appears a slightly abrasive wear characteristics.