Formation mechanism of microstructure of laser cladding high chromium Fe-based alloy and its effect on microhardness

doi:10.12073/j.hjxb.2019400192

	Formation mechanism of microstructure of laser cladding high chromium Fe-based alloy and its effect on microhardness
	Yin, Yan 1; Pan, Cunliang 1; Zhao, Chao 1; Zhang, Ruihua 2,3; Qu, Yuebo 2,3
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2019-07-25
卷号	40 期号:7 页码:114-120
关键词	Carbides Chromium alloys Iron alloys Laser cladding Microhardness Microstructure Steel fibers 3Cr13 stainless steel Cladding layer Constitutional supercooling Fe-based alloys Formation mechanism High-chromium iron-base Laser coatings Optical discs
ISSN号	0253360X
DOI	10.12073/j.hjxb.2019400192
英文摘要	A high chromium iron-base alloy with the coaxial powder laser coating is implemented on the surface of the 3Cr13 stainless steel blade by using 2 kW fibre-optical disc laser to improve the hardness of the blade. SEM, EDS, EPMA and XRD are used to analyze the microstructure of the cladding layer and the microhardness is tested. The results show that the cladding layer is well-formed and metallurgically bonded with the substrate without defects such as cracks, porosity and so on. With the change of the heat dissipation and the constitutional supercooling, microstructure can be roughly divided into three regions: dendritic region, eutectic fine grain region and coarse grain region. The carbides of (Fe, Cr)7C3 is distributed in each region to increase the hardness and abrasion resistance of the cladding layer. As the size of the grain in each region is different, the hardness of the cladding layer is differently distributed. While, the addition of Ni element promotes the austenization of the matrix in the cladding layer. It can play a role in the toughness of the carbides with high hardness during the use of the knife. Thus, the comprehensive mechanical properties of the cladding layer are obtained. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114651]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.China Iron & Steel Research Institute Group, Beijing; 100081, China; 3.Yangjiang Knif-Seissor Hardware Research Institution of Industry Technology, Yangjiang; 529533, China
推荐引用方式 GB/T 7714	Yin, Yan,Pan, Cunliang,Zhao, Chao,et al. Formation mechanism of microstructure of laser cladding high chromium Fe-based alloy and its effect on microhardness[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2019,40(7):114-120.
APA	Yin, Yan,Pan, Cunliang,Zhao, Chao,Zhang, Ruihua,&Qu, Yuebo.(2019).Formation mechanism of microstructure of laser cladding high chromium Fe-based alloy and its effect on microhardness.Hanjie Xuebao/Transactions of the China Welding Institution,40(7),114-120.
MLA	Yin, Yan,et al."Formation mechanism of microstructure of laser cladding high chromium Fe-based alloy and its effect on microhardness".Hanjie Xuebao/Transactions of the China Welding Institution 40.7(2019):114-120.