Abstract
SiC cladding on the alloy surface can significantly improve the high temperature resistance and oxidation resistance of the material. However, heterogeneous cladding usually produces large residual stress and affects the service life of the material. In the process of laser cladding simulated by finite element method, the mechanism of residual stress during SiC deposition on alloy surface is studied by using moving double ellipsoid heat source model. The simulation results show that the residual stress is unevenly distributed near the cladding layer, and the residual stress presents a compression-tension-compression distribution in the thickness direction due to the mixing law of material properties, which provides a reliable numerical prediction method for the residual stress of SiC cladding layer cladding on the alloy base.
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