7C3、Ni3B和TiB2等硬質(zhì)相組成。強化層為韌Ni基體+硬質(zhì)相耐磨組織,硬度在830~907 HV之間,較基體高出700 HV。焊層主要合金元素的擴散、顯微組織變化及顯微硬度沿深層方向的分布呈具有連續(xù)性和漸變性。與基材TA1對比試驗表明,噴焊鎳基合金后摩擦系數(shù)降低,耐磨性明顯提高,噴焊層磨損面呈輕微的磨粒磨損特征。"/>

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TA1純鈦表面鎳基噴焊層的組織和磨損性能
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西華大學材料科學與工程學院,西華大學材料科學與工程學院,西華大學材料科學與工程學院,西華大學材料科學與工程學院

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四川省教育廳重點項目(13ZA0030)、汽車高性能材料及成形技術(shù)四川省高校重點實驗室開放基金(szjj2015-090)和西華大學重點科研基金(z1220114)資助


Microstructure and wear properties of Ni-based spray-welding layer on pure titanium TA1 surface
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College of Material Science and Engineering,Xihua University,College of Material Science and Engineering,Xihua University,College of Material Science and Engineering,Xihua University,College of Material Science and Engineering,Xihua University

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    摘要:

    利用等離子噴焊技術(shù)在TA1純鈦表面制備了鎳基耐磨噴焊層,研究了噴焊層結(jié)構(gòu)、顯微組織和顯微硬度以及摩擦磨損性能。結(jié)果表明：噴焊層由過渡層和強化層組成,焊層與基體間形成了基于原子擴散的冶金結(jié)合界面及以樹枝晶為主的過渡層。噴焊層的組織主要由γ-Ni固溶體,γ-Ni(Ti)固溶體以及TiC、Cr7C3、Ni3B和TiB2等硬質(zhì)相組成。強化層為韌Ni基體+硬質(zhì)相耐磨組織,硬度在830~907 HV之間,較基體高出700 HV。焊層主要合金元素的擴散、顯微組織變化及顯微硬度沿深層方向的分布呈具有連續(xù)性和漸變性。與基材TA1對比試驗表明,噴焊鎳基合金后摩擦系數(shù)降低,耐磨性明顯提高,噴焊層磨損面呈輕微的磨粒磨損特征。

    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.

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王艷,何芹,徐強,熊中. TA1純鈦表面鎳基噴焊層的組織和磨損性能[J].稀有金屬材料與工程,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.]
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  • 收稿日期:2016-02-29
  • 最后修改日期:2016-04-25
  • 錄用日期:2016-05-19
  • 在線發(fā)布日期: 2018-04-11
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