Share Email Print
cover

Proceedings Paper • new

Microstructure and mechanical properties of the coatings in laser cladding and laser-induction hybrid cladding of full-scale rail
Author(s): Li Meng; Kangle Hou; Chen Xian; Qianwu Hu; Dengzhi Wang; Xiaoyan Zeng
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Laser cladding (LC), with small heat affected zone (HAZ) and lower dilution, is a promising way to repair and strengthen the rail. However, the traditional LC may lead to the cracking of the coatings and the martensitic transformation in the HAZ; which will threaten the safety of railway transportation. In this work, laser-induction hybrid cladding (LIHC) was innovatively proposed to prepare Ni-based coatings on a fullscale rail. Cracking behaviors, microstructures and mechanical properties of the coatings obtained by LC and LIHC were studied systemically. The results indicate that the cracks appeared in the HAZ of the specimen prepared by LC can be prevented LIHC, and the coatings obtained exhibit higher second dendrite arm spacing (SDAS). However, the martensitic structures with high hardness of HV730-HV900 in the HAZ by LC could not be avoided by LIHC, while the HAZ has lower plasticity and fracture toughness, which may accelerate the extending rate of cracks.

Paper Details

Date Published: 12 November 2018
PDF: 6 pages
Proc. SPIE 10813, Advanced Laser Processing and Manufacturing II, 108131A (12 November 2018); doi: 10.1117/12.2500654
Show Author Affiliations
Li Meng, Huazhong Univ. of Science and Technology (China)
Kangle Hou, Huazhong Univ. of Science and Technology (China)
Chen Xian, Huazhong Univ. of Science and Technology (China)
Qianwu Hu, Huazhong Univ. of Science and Technology (China)
Dengzhi Wang, Huazhong Univ. of Science and Technology (China)
Xiaoyan Zeng, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10813:
Advanced Laser Processing and Manufacturing II
Rongshi Xiao; Minghui Hong; Jian Liu, Editor(s)

© SPIE. Terms of Use
Back to Top