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Effect of powder feeding rate on mass fraction of WC particles , microstructure evolution and micro-hardness of WC-Ni composite coating by laser cladding

文献类型：期刊论文

作者Bian YH(边艳华)2,4; Li SX(李少霞)2,4; Tian CX(田崇鑫)2,4; Chen B(陈博)2,4; Dong BX(董斌鑫)2,4; Shu Z(舒壮)2,4; Guo, Jianhao1; He XL(何秀丽)2,3,4; Yu G(虞钢)2,3,4
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2025-01-31
卷号1013页码:14
关键词Laser cladding Ni60-WC composite coating Mass fraction of WC particles Microstructure evolution Microhardness
ISSN号0925-8388
DOI10.1016/j.jallcom.2024.178432
通讯作者He, Xiuli(xlhe@imech.ac.cn) ; Yu, Gang(gyu@imech.ac.cn)
英文摘要WC particle reinforced Ni-based composite coatings have excellent properties and can be widely employed to enhance the surface performance of metals by laser cladding technology. In this paper, the Ni60-WC composite coatings under different powder feeding rates are manufactured on H13 steel substrate using laser cladding (LC) technology. The morphology of the molten pool, interface between WC particles and the metal matrix, and the distribution of WC in laser-cladded Ni60-WC composite coatings have been thoroughly investigated. Additionally, the microstructure and microhardness of these coatings have been deeply studied. Moreover, special attention is paid to investigate the thermal damage forms of WC particles and its influence mechanism on the microstructure evolution. Due to the mismatch between laser energy input and powder mass addition, the dilution ratio is too high under the powder feeding rate of 5 g/min, and the mass fraction of WC in the composite coating is only 0.9 %, which is far lower than that of the original powder. In the Ni60-WC composite coating, gamma-(Ni, Fe) solid solution with some new precipitated carbides and borides such as FeW3C, CoW2B2, Ni4B3, Fe3B, M 23 C 6 and M12C can be found through XRD. The combined effects of fine grain hardening, solid solution hardening, precipitation hardening and dispersion hardening are the main reasons for the increase in micro- hardness of the Ni60-WC composite coating. When the powder feeding rate is 25 g/min, the maximum micro- hardness is 936HV, which is 2.4 times that of the H13 steel substrate. The microstructure characteristic is one of the main factors affecting microhardness, which is closely related to the mass fraction of WC, the thermal damage type of WC particles, and the solidification time of the composite coating. This paper provides an in-depth discussion of two thermal damage forms of WC particles, as well as the related microstructure characteristics and evolution mechanisms.
分类号一类
WOS关键词WEAR-RESISTANCE ; BEHAVIOR ; STEEL ; MICROHARDNESS ; DEPOSITION ; KINETICS ; MODEL ; SIZE
资助项目National Key R & D Program of China[2023YFB4603701] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0910203] ; National Natural Science Foun-dation of China[12472123] ; Research Project of Guangdong Aero-space Research Academy[GARA2022001000]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001400605500001
资助机构National Key R & D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foun-dation of China ; Research Project of Guangdong Aero-space Research Academy
其他责任者He, Xiuli ; Yu, Gang
源URL[http://dspace.imech.ac.cn/handle/311007/98201]  
专题宽域飞行工程科学与应用中心
作者单位1.China Railway 14TH Bur Groupment Shield Construct, Nanjing 210000, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;
4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Bian YH,Li SX,Tian CX,et al. Effect of powder feeding rate on mass fraction of WC particles , microstructure evolution and micro-hardness of WC-Ni composite coating by laser cladding[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2025,1013:14.
APA 边艳华.,李少霞.,田崇鑫.,陈博.,董斌鑫.,...&虞钢.(2025).Effect of powder feeding rate on mass fraction of WC particles , microstructure evolution and micro-hardness of WC-Ni composite coating by laser cladding.JOURNAL OF ALLOYS AND COMPOUNDS,1013,14.
MLA 边艳华,et al."Effect of powder feeding rate on mass fraction of WC particles , microstructure evolution and micro-hardness of WC-Ni composite coating by laser cladding".JOURNAL OF ALLOYS AND COMPOUNDS 1013(2025):14.

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来源：力学研究所

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