Effects of heat treatment on microstructure and mechanical properties of Ni60/h-BN self-lubricating anti-wear composite coatings on 304 stainless steel by laser cladding

被引：78

作者：

Lu, Xiao-Long ^{[1
]}

Liu, Xiu-Bo ^{[1
,2
,3
]}

Yu, Peng-Cheng ^{[1
]}

Zhai, Yong-Jie ^{[1
]}

Qiao, Shi-Jie ^{[1
]}

Wang, Ming-Di ^{[1
]}

Wang, Yong-Guang ^{[1
]}

Chen, Yao ^{[1
]}

机构：

[1] Soochow Univ, Sch Mech & Elect Engn, Suzhou 215006, Peoples R China

[2] Changzhou Univ, Jiangsu Key Lab Mat Surface Sci & Technol, Changzhou 213164, Peoples R China

[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2015年 / 355卷

基金：

中国国家自然科学基金;

关键词：

Laser cladding; Heat treatment; Self-lubrication; Microstructure; Nano-indentation; Wear; RESIDUAL-STRESS; WEAR BEHAVIOR; TRIBOLOGICAL BEHAVIOR; TEMPERATURE; ALLOY; STEEL; RESISTANCE; CORROSION; ALUMINUM; HARDNESS;

D O I：

10.1016/j.apsusc.2015.07.138

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Laser clad Ni60/h-BN self-lubricating anti-wear composite coating on 304 stainless steel were heat treated at 600 degrees C (stress relief annealing) for 1 h and 2 h, respectively. Effects of the phase compositions, microstructure, microhardness, nano-indentation and tribological properties of the composite coatings with and without heat treatment had been investigated systemically. Results indicated that three coatings mainly consist of the matrix gamma-(Ni, Fe) solid solution, the CrB ceramic phases and the h-BN lubricating phases. The maximum microhardness of the coatings was first increased from 667.7 HV0.5 to 765.0 HV0.5 after heat treatment for 1 h, and then decreased to 6983 HV0.5 after heat treatment for 2 h. The hardness of gamma-(Ni, Fe) solid solution without heat treatment and after heat treatment 1 h and 2 h were 5.09 GPa, 7.20 GPa and 3.77 GPa, respectively. Compared with the coating without heat treatment, the friction coefficients of the coating after heat treatment were decreased obviously. Effects of the heat treatment time on friction coefficient were negligible, but were significant on wear volume loss. Comparatively speaking, the laser clad self-lubricating anti-wear composite coating after heat treatment for 1 h presented the best anti-wear and friction reduction properties. (c) 2015 Elsevier B.V. All rights reserved.

引用

页码：350 / 358

页数：9

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