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Crystals
Volume 15
Issue 6
10.3390/cryst15060545
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Comparative Study on the Microstructure and Simulation of High-Speed and Conventional Fe-Based Laser-Cladding Coatings

by
Chuan Guo
1,
Shouwen Ding
2,
Xiaoqiang Xue
3,
Mingzhong Li
4,5,
Jingwang Yan
6,
Shubin Wang
6,
Dandan Wang
4,5,
Xiaotong Zhang
1,
Shuisheng Chen
7,
Liuhua Yang
8,
Zhenzhong Liu
3 and
Shirui Guo
2,*
1
Linzhou Heavy Machinery Group Co., Ltd., Anyang 456550, China
2
School of Intelligent Mechatronics Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China
3
Shanxi Xiaobaodang Mining Co., Ltd., Yulin 710018, China
4
China Coal Technology & Engineering Group, Beijing 100013, China
5
State Key Laboratory of Digital and intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Hefei 232001, China
6
Shanxi Coal Group Shenmu Ningtiaota Mining Co., Ltd., Yulin 719314, China
7
School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, China
8
School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
*
Author to whom correspondence should be addressed.
Crystals 2025, 15(6), 545; https://doi.org/10.3390/cryst15060545
Submission received: 6 May 2025 / Revised: 19 May 2025 / Accepted: 4 June 2025 / Published: 6 June 2025
(This article belongs to the Section Inorganic Crystalline Materials)
Versions Notes

Abstract

High-speed and conventional laser cladding technologies were used to prepare Fe-based alloy cladding layers on the surface of 45 steel, compare and analyze the microstructure, microhardness, and phase structure of the two cladding layers, and study and analyze the morphology of the molten pool under the two cladding technologies, as well as the mechanism of evolution of the microstructure of the molten pool during the solidification process. The results show that, compared with the conventional laser melting coating, the grain size of the high-speed laser melting coating is finer, and the cooling rate at the top for conventional laser melting is 5.72 × 103 K/s, and the cooling rate for high-speed laser melting is 3.53 × 105 K/s. The microhardness of the high-speed laser melting coating has been significantly improved, and the solidification rates at the top for the two types of laser melting are the highest, namely 5.84 mm/s and 24.7 mm/s; the molten pool in conventional laser melting is usually larger and deeper, presenting a wide and deep shape, whereas the high-speed laser molten pool is usually shallower and narrower, with a flatter shape, presenting a comet trail, and the fast-cooling and fast-heating effects of high-speed laser melting are more significant.
Keywords: high-speed laser cladding; temperature field; microstructure; phase composition; hardness high-speed laser cladding; temperature field; microstructure; phase composition; hardness

Share and Cite

MDPI and ACS Style

Guo, C.; Ding, S.; Xue, X.; Li, M.; Yan, J.; Wang, S.; Wang, D.; Zhang, X.; Chen, S.; Yang, L.; et al. Comparative Study on the Microstructure and Simulation of High-Speed and Conventional Fe-Based Laser-Cladding Coatings. Crystals 2025, 15, 545. https://doi.org/10.3390/cryst15060545

AMA Style

Guo C, Ding S, Xue X, Li M, Yan J, Wang S, Wang D, Zhang X, Chen S, Yang L, et al. Comparative Study on the Microstructure and Simulation of High-Speed and Conventional Fe-Based Laser-Cladding Coatings. Crystals. 2025; 15(6):545. https://doi.org/10.3390/cryst15060545

Chicago/Turabian Style

Guo, Chuan, Shouwen Ding, Xiaoqiang Xue, Mingzhong Li, Jingwang Yan, Shubin Wang, Dandan Wang, Xiaotong Zhang, Shuisheng Chen, Liuhua Yang, and et al. 2025. "Comparative Study on the Microstructure and Simulation of High-Speed and Conventional Fe-Based Laser-Cladding Coatings" Crystals 15, no. 6: 545. https://doi.org/10.3390/cryst15060545

APA Style

Guo, C., Ding, S., Xue, X., Li, M., Yan, J., Wang, S., Wang, D., Zhang, X., Chen, S., Yang, L., Liu, Z., & Guo, S. (2025). Comparative Study on the Microstructure and Simulation of High-Speed and Conventional Fe-Based Laser-Cladding Coatings. Crystals, 15(6), 545. https://doi.org/10.3390/cryst15060545

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