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Proceedings Paper

Heat-affected zone microstructure and mechanical properties evolution for laser remanufacturing LZ50 axle steel
Author(s): Xiangyi Feng; Shiyun Dong; Jinxiang Fang; Shixing Yan; Binshi Xu; Fusheng Pan
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Paper Abstract

In this article, the laser cladding on LZ50 axle steel was conducted to investigate the evolution of microstructure and mechanical property of HAZ. Based on the quality of cladding formation and thermal damage evaluation in the HAZ, the optimal process parameters was obtained as 7.8g/min powder feeding rate,420mm/min scanning rate and other constant settings. The microstructure of HAZ was characterized by means of OM and SEM. Meanwhile hardness distribution in HAZ and tensile property of cladding-HAZ-substrate samples were measured. The results indicate that, Two types of HAZs were observed under different cladding strategies: gradually changed microstructure during thin-layer cladding process and relatively uniform microstructure during multi-layer cladding process..Due to different maximum temperature of thermal cycle, HAZ and substrate have partial surface hardening during the laser cladding process. The mechanism of hardening was discussed. The final microstructure after complex thermal cycles result hardening behavior in both HAZ and substrate.

Paper Details

Date Published: 24 October 2017
PDF: 6 pages
Proc. SPIE 10457, AOPC 2017: Laser Components, Systems, and Applications, 104571X (24 October 2017);
Show Author Affiliations
Xiangyi Feng, Chongqing Univ. (China)
Academy of Armored Forces Engineering (China)
Shiyun Dong, Academy of Armored Forces Engineering (China)
Jinxiang Fang, Guizhou Univ. (China)
Shixing Yan, Academy of Armored Forces Engineering (China)
Binshi Xu, Academy of Armored Forces Engineering (China)
Fusheng Pan, Chongqing Univ. (China)

Published in SPIE Proceedings Vol. 10457:
AOPC 2017: Laser Components, Systems, and Applications
Shibin Jiang; Lijun Wang; Lan Jiang; Long Zhang, Editor(s)

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