Study on the thermal behavior and microstructure of Fe-based deposited layers prepared by laser cladding on Al substrate

This research paper primarily explores the thermal behavior and microstructure of Fe-based deposit layers prepared via laser cladding on an Al substrate. Initially, the study quantitatively measured the temperature changes in the powder flow and the cladded layer using a monochromatic temperature measurement method and delved into the relationships between powder pre-melting behavior, cladding velocity, and the evolution of the cladded layer's microstructure. Subsequently, Fe-Cr-Ni-B-Si martensitic stainless steel powder was chosen to clad the Al substrate. Intensive analysis of the experimental results generated a comprehensive understanding of the impacts that conditions such as the laser focal plane location and cladding speed have on layer formation. Finally, the paper investigated the influences of laser focal plane location and cladding speed on the characteristics of the laser clad layer, providing profound insight into the effects of increased cladding speed on reducing clad layer thickness and structural changes. The conclusions drawn from this research study are highly beneficial to better comprehend applications of laser cladding in domains such as manufacturing and layer preparation.