Microstructure and Properties of Laser Cladding Al0.8CoCr0.23FeNixW High Entropy Alloy Coating on H13 Steel
Taking hot work die steel H13 as substrate,Al0.8CoCr0.23FeNixW(x=0,0.25,0.5,0.75,1)high entropy alloy coating was prepared on the surface of H13 steel by laser cladding,and effects of Ni addition on microstructure,thermal stability,and wear resistance were investigated.The results indicate that the microstructure of Al0.8CoCr0.23FeNixW high entropy alloy is transformed with Ni addition.Ni promotes the formation of μ-Fe7W6 phase,which plays a role of dispersion strengthening,enhancing the hardness and wear resistance of the coating.The stability of the coating is tested after holding at 800℃.The results reveal that the Al0.8CoCr0.23FeNixW high entropy alloy coat-ing exhibits desirable hardness and wear resistance,and the hardness remains higher than 500 HV after holding for 8 h.
Hot Working Die SteelHigh Temperature WearHigh Entropy Alloy
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