Effects of Laser Cladding Parameters on Microstructure and Properties of Gradient Cladded Coating on 45# Steel

被引：3

作者：

Xu N.-J. ^{[1
,2
]}

Liu C.-S. ^{[1
,3
]}

Feng X.-Y. ^{[1
,3
]}

Sun T. ^{[4
]}

机构：

[1] Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang

[2] College of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an

[3] Key Laboratory for Laser Application Technology and Equipment of Liaoning Province, Northeastern University, Shenyang

[4] School of Sciences, Northeastern University, Shenyang

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2019年 / 40卷 / 04期

关键词：

45[!sup]#[!/sup] steel; Gradient coating; Laminar flow cooling roll; Laser cladding; Microstructure and properties;

D O I：

10.12068/j.issn.1005-3026.2019.04.008

中图分类号：

学科分类号：

摘要：

The effects of laser cladding power, scanning speed and cladding materials on the microstructure and wear resistance of the cladded coating on 45# steel were investigated. The results show that the gradient cladded layer is continuous without the defects of crack pores and is metallurgically bonded to the 45# steel matrix.The microstructure of the cladded layer are characterized by dendritic crystals, equiaxed crystals and other rapid solidification structures, which is composed of α-Fe, CrNiFe-C and Cr7C3. The microhardness of the cladded layer is gradient, and the surface hardness of the cladded layer and the transition layer are 7.48 GPa and 5.52 GPa, respectively, which is 3.74 and 2.76 times of the hardness of the substrate.Therefore, the laser cladding technology can significantly improve the wear resistance of 45# steel. © 2019, Editorial Department of Journal of Northeastern University. All right reserved.

引用

页码：495 / 499

页数：4

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