Numerical simulation and experiments of laser cladding of nickel-based alloy coating on stainless steel surface

doi:10.13251/j.issn.0254-6051.2023.01.040

Abstract

Abstract: In order to improve the cladding quality of stainless steel surface and explore the influence of energy densities on the cladding quality of nickel-based alloy coating prepared by laser cladding on stainless steel surface, the numerical simulation of laser cladding of the Ni35 alloy coating on the 304 stainless steel was carried out by using Visual-Environment software and based on Gaussian body heat source model by varying the laser power to obtain different energy density inputs, and the laser power corresponding to the energy density was used for the experiment verification. The simulation results show that when the laser power is 900 W, the scanning speed is 6 mm/s and the laser spot radius is 1 mm, the laser energy density is 75 J/mm², then the obtained peak temperature of the simulated temperature distribution cloud map is 2459.55 ℃, which is in the reasonable temperature range(2400-2600 ℃). Under these parameters, the experiment verification results show that the macromorphology of the coating is fine, the microstructure is compact, and a good metallurgical bonding is formed between the coating and the substrate.

Key words: energy density, laser cladding, temperature cloud map, stainless steel, numerical simulation

CLC Number:

TG456.7

Wang Bingtao, Xiong Zonghui, Sun Yaoning. Numerical simulation and experiments of laser cladding of nickel-based alloy coating on stainless steel surface[J]. Heat Treatment of Metals, 2023, 48(1): 232-237.

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