Dr. Qilin Deng Profile

Dr. Qilin Deng

at Shanghai Jiao Tong Univ

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Proceedings Article | 27 November 2023 Paper

Multi-layer laser cladding of 316L/H13+20%WC composition coatings on the surface of H13 steel

W. Tong, X. L. Shi, J. L. Song, Q. L. Deng

Proceedings Volume 12762, 127620K (2023) https://doi.org/10.1117/12.2687630

KEYWORDS: Cladding, Composites, Chromium, Resistance, Laser microstructuring, Chemical composition, Surface finishing, Interfaces, Materials properties, Iron

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H13 steel is often used to manufacture hot working dies such as forging dies and injection molds. These dies are prone to wear, cracking and failure on the surface under the action of high temperature and pressure. Laser cladding is an effective method for surface modification and remanufacturing of the H13 steel dies. However, due to the characteristics of rapid cooling and heating in laser cladding, the temperature gradient and cooling rate in the forming process are too large, which often leads to excessive thermal stress and cracking during the process, especially in multi-layer cladding. Laser cladding of multi-layer 316L/H13+20%WC composite coatings was carried out on the surface of H13 steel. The microstructure, element diffusion behavior and wear properties of the cladding layers were studied. Through design of the cladding layer materials, good adhesion performance with the substrate, high toughness of the bottom layers and high hardness and wear resistance of the top layer has been obtained to reduce the cracking tendency and enhance the comprehensive property of the cladding layers. Finally, defect free multi-layer functional composite coatings have been obtained.

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