Microstructure and properties of in-situ synthesized Ni3Ta-TaC reinforced Ni-based coatings by laser cladding

被引：28
作者：
Hu, Dengwen [1 ]
Liu, Yan [1 ]
Chen, Hui [1 ]
Wang, Mengchao [1 ]
Liu, Jin [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2021年 / 405卷
关键词：
Shield tunneling machine; Laser cladding; In-situ synthesized; Ni-Ta alloy; Wear resistance; MECHANICAL-PROPERTIES; TAC; RESISTANCE;
D O I：
10.1016/j.surfcoat.2020.126599
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The Ni3Ta-TaC reinforced Ni-based coating is synthesized in-situ on the substrate of the shield tunneling machine cutter ring by laser cladding to improve its wear resistance. The microstructure and strengthening mechanism of Ni-Ta and Ni-Ta-C coatings were studied respectively. The wear resistance of the two coatings was studied and compared with the substrate. The Ni-Ta coating is mainly composed of gamma-Ni, Ni3Ta and Ta phases, while the NiTa-C coating is mainly composed of gamma-Ni, Ni3Ta and TaC phases. The wear resistance of Ni-Ta coating and Ni-Ta-C coating is 2 times and 4 times higher than that of 5Cr5MoSiV1 steel, respectively. It is expected to improve the wear resistance of the shield cutter ring.
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页数：11
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