Influence of CH compound and Ni60A on microstructure and mechanical properties of 304 stainless steel specimens by laser rapid forming

This paper aimed to investigate the comprehensive mechanical properties of the specimen formed by 5 kw CO2 laser rapid forming with three types of 304 stainless steel powders on Q235 substrate, namely, one standard 304 stainless steel powder, one kind of 304 stainless steel powder with CH compound, one kind of 304 stainless steel powder with the addition of CH compound and Ni60A. The results showed that the CH addition can significantly enhance the microhardness, tensile strength and elongation of the specimens and the microstructure was refined. Besides, with the addition of CH compound and Ni60A in the 304 stainless steel powder, the tensile strength and microhardness of the specimens was increased gradually while its elongation was decreased.