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,2018,47(3):910~914.[Wang Yan,He Qin,Xu Qiang,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.]
TA1纯钛表面镍基喷焊层的组织和磨损性能
投稿时间:2016-02-29  修订日期:2016-04-25
中文关键词:  等离子喷焊  TA1  镍基喷焊层  组织  摩擦磨损性能
基金项目: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
中文摘要:
      利用等离子喷焊技术在TA1纯钛表面制备了镍基耐磨喷焊层,研究了喷焊层结构、显微组织和显微硬度以及摩擦磨损性能。结果表明:喷焊层由过渡层和强化层组成,焊层与基体间形成了基于原子扩散的冶金结合界面及以树枝晶为主的过渡层。喷焊层的组织主要由γ-Ni固溶体,γ-Ni(Ti)固溶体以及TiC、Cr7C3、Ni3B和TiB2等硬质相组成。强化层为韧Ni基体+硬质相耐磨组织,硬度在830~907 HV之间,较基体高出700 HV。焊层主要合金元素的扩散、显微组织变化及显微硬度沿深层方向的分布呈具有连续性和渐变性。与基材TA1对比试验表明,喷焊镍基合金后摩擦系数降低,耐磨性明显提高,喷焊层磨损面呈轻微的磨粒磨损特征。
Microstructure and wear properties of Ni-based spray-welding layer on pure titanium TA1 surface
英文关键词:Plasma spray-welding  TA1  Ni-based spray-welding coating  Microstructure  Tribological properties
英文摘要:
      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.
作者单位E-mail
王艳 西华大学材料科学与工程学院 wangyan788@163.com 
何芹 西华大学材料科学与工程学院  
徐强 西华大学材料科学与工程学院  
熊中 西华大学材料科学与工程学院  
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