Key issues in laser cladding of tungsten carbide wear resistant materials

WANG Dongchun; Du Jintao; LIU Hui; LUAN Chengqun

doi:10.7512/j.issn.1001-2303.2021.08.20

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Key issues in laser cladding of tungsten carbide wear resistant materials
Vol. 51, Issue 8, Pages: 146-152(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.08.20
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DOI：

WANG Dongchun, Du Jintao, LIU Hui, et al. Key issues in laser cladding of tungsten carbide wear resistant materials[J]. Eletric Welding Machine2021, 51(8): 146-152. DOI： 10.7512/j.issn.1001-2303.2021.08.20.

摘要

碳化钨材料具有高硬度、高熔点等特性

被作为硬质相广泛用于激光熔覆表面强化

能够大幅提升表面耐磨、耐腐蚀性能。碳化钨在提升激光熔覆层性能的同时

也带来了气孔、裂纹、碳化钨颗粒不均等工艺问题

围绕碳化钨材料激光熔覆过程热历程与微观组织演化、熔池对流与元素扩散、碳化钨分解与热损伤、热应力与缺陷抑制

以及碳化钨涂层磨损机理等关键问题

国内外开展了诸多研究

对此进行全面阐述。在此基础上

指出碳化钨材料激光熔覆研究中的不足以及未来发展趋势。

Abstract

Due to high hardness

high melting point and other characteristics

tungsten carbide material is widely used as a hard phase for laser cladding surface strengthening

which can greatly improve the surface wear resistance and corrosion resistance. Tungsten carbide improves the performance of laser cladding layer

but there are some problems such as pores

cracks and uneven tungsten carbide particles. A lot of researches have been carried out on the key issues of thermal history and microstructure evolution

convection and element diffusion in molten pool

decomposition and thermal damage

thermal stress and defect

and wear mechanism during laser cladding process of tungsten carbide. On this basis

the shortcomings and future development trend of laser cladding of tungsten carbide are pointed out.