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Microstructure and wear resistance of in situ synthesized particle-reinforced novel stainless steel by laser melting deposition

The in situ synthesized particles-reinforced novel stainless steel was produced via laser melting deposition technology, aiming to fabricate a new wear-resistant material. The Cr3C2 and high vanadium alloy powder were introduced into novel stainless steel and the phase compositions, microstructure, microhardness and wear resistance of the novel wear-resistant material were investigated using XRD, SEM, microhardness tester and friction-wear tester, respectively. The results showed that the V8C7 and Cr23C6 phases were in situ synthesized successfully after the Cr3C2 and high vanadium alloy powder was introduced, and the microstructure of carbides reinforced novel stainless steel was refined significantly. The microhardness of carbides reinforced novel stainless steel was 800HV0.2, which was ~1.2 times that of new stainless steel, and the wear resistance was ~4 times that of the new stainless steel.