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TC4表面Ti2SC-Ti2Ni复合结构相的自润滑激光熔覆层组织与性能

Microstructure and Properties of Ti2SC-Ti2Ni Composite Structural Phase Self-Lubricating Laser Cladding Layer on TC4 Surface

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摘要

为了提升TC4表面摩擦学性能,利用通快4002同轴送粉光纤激光器,在TC4表面制备了TC4+Ni60+Ni-MoS2多元复合自润滑耐磨涂层,并分析研究了涂层组织和摩擦学性能。结果表明,熔覆层中无裂纹产生,但存在少量气孔缺陷,涂层生成相主要包括TiC、Ti2Ni、Ti2SC以及α-Ti;各生成相在涂层中的分布均匀致密,其中Ti2SC与Ti2Ni形成了Ti2SC-Ti2Ni镶嵌结构复合相, (001 )Ti2Ni晶面与 (01 1ˉ0 )Ti2SC晶面间的错配度为3.18%,两相形成了共格界面关系;涂层的显微硬度较基材得到显著提高,Ti2SC-Ti2Ni镶嵌结构复合相有效改善了涂层的减摩、耐磨性能,涂层磨损机制为磨粒磨损。

Abstract

To improve the tribological properties of TC4 surfaces, a TC4+Ni60+Ni-MoS2 multi-component composite self-lubricating wear-resistant coating was prepared on the TC4 surface by the TruDisk4002 coaxial powder feeding fiber laser. The microstructure and the tribological performance of this coating were also analyzed. The results show that there are no cracks but a few pores within the coating. The main precipitation phases of the coating are TiC, Ti2Ni, Ti2SC, and α-Ti, and they are uniformly and compactly distributed within the coating. Ti2SC and Ti2Ni form the Ti2SC-Ti2Ni mosaic structure composite phase, and the misfit between (01 1ˉ0 )Ti2SC and (001 )Ti2Ni is 3.18%. Ti2SC and Ti2Ni form the coherent interface relationship. The coating micro-hardness is obviously higher than that of the substrate. The Ti2SC-Ti2Ni mosaic composite phase can effectively improve the anti-friction and wear resistance of coatings, and the wear mechanism of coatings is abrasive wear.

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中图分类号:TG174.44

DOI:10.3788/AOS202040.1114001

所属栏目:激光器与激光光学

基金项目:国家自然科学基金、中央高校基本科研业务费项目中国民航大学专项、天津市研究生科研创新项目;

收稿日期:2020-01-20

修改稿日期:2020-03-09

网络出版日期:2020-06-01

作者单位    点击查看

张天刚:中国民航大学工程技术训练中心, 天津 300300
张倩:中国民航大学航空工程学院, 天津 300300
庄怀风:中国民航大学中欧航空工程师学院, 天津 300300
薛鹏:中国民航大学工程技术训练中心, 天津 300300
姚波:中国民航大学航空工程学院, 天津 300300
徐誉桐:中国民航大学中欧航空工程师学院, 天津 300300
李宝轩:中国民航大学中欧航空工程师学院, 天津 300300

联系人作者:薛鹏(797341@qq.com)

备注:国家自然科学基金、中央高校基本科研业务费项目中国民航大学专项、天津市研究生科研创新项目;

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引用该论文

Zhang Tiangang,Zhang Qian,Zhuang Huaifeng,Xue Peng,Yao Bo,Xu Yutong,Li Baoxuan. Microstructure and Properties of Ti2SC-Ti2Ni Composite Structural Phase Self-Lubricating Laser Cladding Layer on TC4 Surface[J]. Acta Optica Sinica, 2020, 40(11): 1114001

张天刚,张倩,庄怀风,薛鹏,姚波,徐誉桐,李宝轩. TC4表面Ti2SC-Ti2Ni复合结构相的自润滑激光熔覆层组织与性能[J]. 光学学报, 2020, 40(11): 1114001

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