Effect of in situ NbC synthesis via laser cladding on microstructure and slurry erosion of carbide-reinforced iron-based coatings

doi:10.1016/j.mtcomm.2024.111314

IMR OpenIR

	Effect of in situ NbC synthesis via laser cladding on microstructure and slurry erosion of carbide-reinforced iron-based coatings
	Wang, T.1; Wang, M. S.2; Wang, Z. Y.3; Xu, T. Z.1; Wu, C. L.1; Zhang, C. H.1; Zhang, S.1; Chen, H. T.4
通讯作者	Wang, M. S.(mswang@imr.ac.cn) ; Zhang, S.(songzhang_sy@163.com)
	2025
发表期刊	MATERIALS TODAY COMMUNICATIONS
卷号	42 页码:13
摘要	Slurry erosion is a significant cause of overflow components failure. To enhance the slurry erosion resistance of 0Cr13Ni4Mo martensitic stainless steel used in overcurrent components, this paper employs laser fusion cladding technology to apply carbide-reinforced iron-based composite coatings on its surface. The study examines the microstructure, microhardness, and slurry erosion behavior of these coatings. The findings reveal a robust metallurgical bond between the fusion cladding layer and the substrate. The inclusion of Nb effectively prevents porosity and defects. Thermodynamic theory confirms the formation of NbC in the coating, which acts as a heterogeneous nucleation point during solidification, promoting grain refinement. Additionally, the Nb element facilitates the solid solution of Cr in the fusion cladding layer, enhancing solid solution strengthening. The microhardness of the 9Nb coating increased to 650 +/- 7.2 HV, largely due to the strengthening effect of the in situ synthesized NbC. NbC also fosters the development of small-angle grain boundaries and geometrically necessary dislocations, with the proportion of small-angle grain boundaries in the 9 Nb coating reaching 83.72 % and the rho GND reaching 3.054 x 1016 m-2 The combined effects of fine-grain strengthening, solid-solution strengthening, second-phase strengthening, and dislocation strengthening mechanisms result in improved microhardness and slurry erosion resistance. In a 200-hour slurry erosion test, the weight loss of the 9 Nb coating was minimized to 0.22 +/- 0.02 mg, representing a reduction of 148 % compared to the substrate and 41 % compared to the 0 Nb coating, demonstrating exceptional slurry erosion resistance. The addition of Nb increases the volume fraction of carbides in the coating, which enhances the "protrusion effect" of these carbides and thereby significantly reduces weight loss due to slurry erosion. Furthermore, while the substrate primarily exhibits ductile fracture under erosion, the two coatings display a damage mode that combines both brittleness and ductility.
关键词	Laser cladding Fe-based composite cladding NbC Slurry Erosion In-situ reaction
资助者	National Key Research and Development Program of China ; General Project of Guangxi Natural Science Foundation ; Shenyang Science and Technology
DOI	10.1016/j.mtcomm.2024.111314
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2023YFB4606605] ; General Project of Guangxi Natural Science Foundation[2023GXNSFAA026421] ; Shenyang Science and Technology[22-101-0-16]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001390420600001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180765
专题	中国科学院金属研究所
通讯作者	Wang, M. S.; Zhang, S.
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110072, Liaoning, Peoples R China 3.Wuzhou Univ, Sch Mat, Wuzhou 543003, Guangxi, Peoples R China 4.Shenyang Dalu Laser Technol CO LTD, Shenyang 110136, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Wang, T.,Wang, M. S.,Wang, Z. Y.,et al. Effect of in situ NbC synthesis via laser cladding on microstructure and slurry erosion of carbide-reinforced iron-based coatings[J]. MATERIALS TODAY COMMUNICATIONS,2025,42:13.
APA	Wang, T..,Wang, M. S..,Wang, Z. Y..,Xu, T. Z..,Wu, C. L..,...&Chen, H. T..(2025).Effect of in situ NbC synthesis via laser cladding on microstructure and slurry erosion of carbide-reinforced iron-based coatings.MATERIALS TODAY COMMUNICATIONS,42,13.
MLA	Wang, T.,et al."Effect of in situ NbC synthesis via laser cladding on microstructure and slurry erosion of carbide-reinforced iron-based coatings".MATERIALS TODAY COMMUNICATIONS 42(2025):13.