High-Temperature Wear Resistance of Ni-based Alloy Coating Prepared by Different Processes

LIU Dong; ZHANG Lei; LIU Zhe; LI Bingzhong

doi:10.11973/jxgccl201901013

Materials and Mechanical Engineering > 2019 > 43(1): 58-63. > DOI: 10.11973/jxgccl201901013

LIU Dong, ZHANG Lei, LIU Zhe, LI Bingzhong. High-Temperature Wear Resistance of Ni-based Alloy Coating Prepared by Different Processes[J]. Materials and Mechanical Engineering, 2019, 43(1): 58-63. DOI: 10.11973/jxgccl201901013

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High-Temperature Wear Resistance of Ni-based Alloy Coating Prepared by Different Processes

1. Wuhan Research Institute of Materials Protection, Wuhan 430030, China;
2. State Key Laboratory of Surface Protection Materials and Application Technology, Wuhan 430030, China

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Received Date: October 24, 2017
Revised Date: December 06, 2018

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Abstract

The Ni-based alloy coatings were prepared on the substrate of 45 steel by flame remelting, plasma surfacing and intermediate frequency induction remelting with commercial Ni60 alloy powder as coating material, respectively. The phase composition, microstructure,microhardness and high-temperature wear resistance of the coatings were studied. The results show that Ni-based alloy coatings with low porosity were obtained. The main hard phases of coatings prepared by flame remelting and intermediate frequency induction remelting were carbides which distributed uniformly. The grains of coatings prepared by intermediate frequency induction remelting were relatively small, and the microhardness was relatively high. The grains of the coating prepared by plasma surfacing were big; the hard phases mainly consisted of borides and distributed unevenly; the coating had the lowest microhardness. The coating prepared by intermediate frequency induction remelting had excellent high-temperature wear resistance, and the wear mechanism was adhesive wear and abrasive wear; the high-temperature wear resistance of the coating prepared by flame remelting was not good, and the main wear mechanism was adhesive wear. The coating prepared by plasma surfacing had the worst high-temperature wear resistance, and the wear mechanism was adhesive wear and fatigue wear.
- Ni-based alloy coating,
- intermediate frequency induction remelting,
- flame remelting,
- plasma surfacing,
- microhardness,
- high-temperature wear

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