Abstract
Extreme high-speed laser material deposition (EHLA) technology is a novel approach to surface modification and component repair that offers benefits, including high cladding efficiency, a low dilution rate, and environmental friendliness. In this research, numerical modeling was used to analyze how varying substrate preheating temperatures affected the temperature field and residual stress of coatings made of 1Cr17Ni2 stainless steel. It was discovered that the peak melt pool temperature was less affected by the substrate preheating temperature. However, the cooling rate and temperature gradient were greatly reduced. When the preheating temperature was 450 °C, the cladding layer showed the lowest temperature gradient and residual stress. The investigation’s findings can be used as a reference to improve the EHLA of 1Cr17Ni2 stainless steel coatings and lessen the possibility of coating cracking.
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