Effect of WC content on microstructure and hardness of WC-Ni60 spray welding coating

doi:10.13251/j.issn.0254-6051.2024.04.044

Abstract

Abstract: WC-Ni60 spray welding coatings with different WC contents (10%, 20%, 30%, 40% and 50%) were prepared on A3 steel plate by oxyacetylene flame spray welding process. Through comparative analysis, the effect of WC content on the microstructure and hardness of the spray welding layer was studied. The results show that after spray welding, a “white bright band” eutectic structure forms at the junction of the WC-Ni60 alloy coating with the A3 steel plate matrix, and the metallurgical bonding is good. With the increase of WC content, WC particles in the microstructure of the spray welding coating gradually increase, the microhardness is also higher and reaches more than 2 times of that of the base material. However, when the WC content exceeds 30%, pores and other defects are easy to appear in the microstructure.

Key words: WC-Ni60 alloy powder, WC content, flame spray welding coating, microstructure, mechanical properties

CLC Number:

TG166.7

Zhao Hulin, Gou Zanghong, Yuan Yongfeng, Cao Jing, Zhao Xin. Effect of WC content on microstructure and hardness of WC-Ni60 spray welding coating[J]. Heat Treatment of Metals, 2024, 49(4): 278-283.

References

[1]陈艺文, 柏洪武, 巩秀芳, 等. 氧乙炔火焰喷焊镍基复合涂层的显微组织和腐蚀性能研究[J]. 表面技术, 2021, 50(5): 295-299.
Chen Yiwen, Bai Hongwu, Gong Xiufang, et al. Study on microstructure and corrosion performance of nickel base composite coatings prepared by oxy-acetylene flame spray welding[J]. Surface Technology, 2021, 50(5): 295-299.
[2]杨效田, 魏亨利, 周俊, 等. 重熔温度对Ni60/WC定向结构涂层微结构演变的影响[J]. 哈尔滨工程大学学报, 2022, 43(4): 5887-591.
Yang Xiaotian, Wei Hengli, Zhou Jun, et al. Effects of remelting temperature on the microstructure evolution of Ni60/WC directional structure coating[J]. Journal of Harbin Engineering University, 2022, 43(4): 587-591.
[3]徐进, 阳义. 水轮机过流部件现场激光熔覆修复和表面强化涂层应用研究[J]. 大电机技术, 2020(6): 55-57.
Xu Jin, Yang Yi. The application research of field laser cladding repair and surface strengthening coating in the flow passage parts of hydraulic turbine[J]. Large Electric Machine and Hydraulic Turbine, 2020(6): 55-57.
[4]吴有伍, 谭兴龙, 吴琴, 等. 铸造碳化钨添加量对镍基复合喷熔涂层性能的影响[J]. 铸造, 2013, 62(9): 874-877.
Wu Youwu, Tan Xinglong, Wu Qin, et al. Effect of the casting WC powder content on the performance of WC reinforced Ni-based spray-fused coating[J]. Foundry, 2013, 62(9): 874-877.
[5]Usana-Ampaipong T, Dumkum C, Tuchinda K, et al. Surface and subsurface characteristics of NiCrBSi coating with different WC amount prepared by flame spray method[J]. Journal of Thermal Spray Technology, 2019, 28: 580-590.
[6]Afsous M, Shafyei A, Soltani M, et al. Characterization and evaluation of tribological properties of NiCrBSi-Cr composite coatings deposited on stainless steel 420 by HVOF[J]. Journal of Thermal Spray Technology, 2020, 29: 773-788.
[7]Chen Z X, Li H, Ren L M, et al. Effect of tungsten carbide addition on the wear resistance of flame-sprayed self-lubricating Ni-graphite coatings[J]. Journal of Materials Engineering and Performance, 2020, 29: 1156-1164.
[8]王长生, 杨蕴林. WC加入量对Ni60自熔合金喷焊层磨粒磨损性能影响[J]. 热加工工艺, 1997, 26(11): 28-31.
Wang Changsheng, Yang Yunlin. Effect of the WC addition on the abrasive wear properties of fused Ni60 self-fluxing alloy coating[J]. Hot Working Technology, 1997, 26(11): 28-31.
[9]董志红, 范洪远, 陈诗海. Cr-WC-Ni60 热喷焊复合涂层的微观结构[J]. 金属热处理, 2005, 30(4): 67-69.
Dong Zhihong, Fan Hongyuan, Chen Shihai. Microstructure of Cr-WC-Ni60 composite coating by thermal spraying[J]. Heat Treatment of Metals, 2005, 30(4): 67-69.
[10]李于朋, 李宁, 王世君, 等. 等离子喷焊Ni60A合金的组织与性能研究[J]. 长春工业大学学报, 2010, 31(4): 399-402.
Li Yupeng, Li Ning, Wang Shijun, et al. Microstructure and properties of plasma spray welding Ni60A alloy[J]. Journal of Changchun University of Technology, 2010, 31(4): 399-402.
[11]张学萍, 李文. 三种Ni-WC合金粉末喷焊层耐磨性的研究[J]. 沈阳工业学院学报, 2000, 19(3): 46-49.
Zhang Xueping, Li Wen. Study on wearability properties for three kinds of Ni-WC powder coating[J]. Journal of Shenyang Institute of Technology, 2000, 19(3): 46-49.
[12]李福泉, 冯鑫友, 陈彦宾. WC含量对WC/Ni60A激光熔覆层微观组织的影响[J]. 中国激光, 2016, 43(4): 111-117.
Li Fuquan, Feng Xinyou, Chen Yanbin. Influence of WC content on microstructure of WC/Ni60A laser cladding layer[J]. Chinese Journal of Lasers, 2016, 43(4): 111-117.
[13]李金华, 单鹏超, 姚芳萍, 等. 激光熔覆工艺参数对Ni60硬度和显微组织的影响[J]. 热加工工艺, 2023, 52(23): 58-62.
Li Jinhua, Shan Pengchao, Yao Fangping, et al. Effects of laser cladding process parameters on hardness and microstructure of Ni60[J]. Hot Working Technology, 2023, 52(23): 58-62.
[14]王建萍, 唐菊, 王灿, 等. 氧乙炔火焰喷焊制备自熔性合金涂层及其性能研究[J]. 表面技术, 2018, 47(2): 117-121.
Wang Jianping, Tang Ju, Wang Can, et al. Properties of self-fluxing alloy coating prepared by oxy-acetylene flame spray welding[J]. Surface Technology, 2018, 47(2): 117-121.
[15]李朋洋, 余新泉, 黄怡, 等. 火焰喷焊和等离子堆焊制备Ni60及Ni60-WC涂层的组织与性能[J]. 机械工程材料, 2017, 41(10): 38-43.
Li Pengyang, Yu Xinquan, Huang Yi, et al. Microstructure and properties of Ni60 and Ni60-WC coatings by flame spraying and plasma arc surfacing[J]. Materials for Mechanical Engineering, 2017, 41(10): 38-43.