Research status and development direction of extreme high-speed laser material deposition

WU Ying; LIU Yan; CHEN Wenjing; CHEN Hui

doi:10.7512/j.issn.1001-2303.2020.03.01

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Research status and development direction of extreme high-speed laser material deposition
Vol. 50, Issue 3, Pages: 1-10(2020)
Published：2020
DOI： 10.7512/j.issn.1001-2303.2020.03.01
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DOI：

WU Ying, LIU Yan, CHEN Wenjing, et al. Research status and development direction of extreme high-speed laser material deposition[J]. Eletric Welding Machine2020, 50(3): 1-10. DOI： 10.7512/j.issn.1001-2303.2020.03.01.

摘要

超高速激光熔覆技术是近年新开发的表面涂层技术

通过调整激光、粉材和熔池的相对位置

优化了粉体的熔凝形式和能量吸收比例

从而提高了材料沉积速度

获得高效、无缺陷、高结合强度、低稀释率的熔覆涂层

相比于硬铬电镀、热喷涂、传统激光熔覆和堆焊有其独特优势。详细介绍了超高速激光熔覆的技术特点与典型优势;综述了该技术国内外的工艺、组织、性能和数值仿真等研究现状和工业应用情况;基于目前研发的进展

展望了该技术后续的拓展和发展前景;同时指出了目前涂层构件力学基础研究欠缺造成技术应用推广受阻等不足之处。

Abstract

Extreme high-speed laser material deposition is a new type coating technology. It optimizes the fusion-solidification mode and power absorption by modifying the relative positions of laser light

spray powder and molten pool

thus the deposition speed rate is improved

and a high quality coating

which is free of defects and has high bonding strength as well as low dilution rate

is obtained. Extreme high-speed laser material deposition possesses unique advantages comparing with the other coating technologies

including hard chrome plating

thermal spraying

conventional laser cladding and welding. This paper details the technical features and advantages of extreme high-speed laser material deposition processing

summarizes the research conditions of this new technology

including processing parameters

microstructures

properties and industrial application. An outlook of future development about extreme high-speed laser material deposition is given. It is pointed out that a lack of fundamental mechanics studies about coated components has hindered the application of this new technology.