▎ 摘　　要

NOVELTY - An additive manufacturing of copper-based polymorphic high-entropy alloy powder comprises preparing copper-based polymorphic high-entropy alloy powder as forming powder; treating surface of stainless steel or copper alloy with nickel as base material, placing copper-based polymorphic high-entropy alloy powder in automatic powder feeder, induction heating, performing coupling of laser heat source and induction heating source, and performing ultra-high-speed laser-induction composite cladding; and performing ultrasonic rolling treatment on each cladding layer formed, raising processing head to the height of one layer along the Z direction, and repeating composite cladding steps. The copper-based polymorphic high-entropy alloy powder comprises 20-35 wt.% molybdenum, 5-15 wt.% niobium, 2-5 wt.% silicon, 2-10 wt.% aluminum, 0.5-5 wt.% hafnium oxide, 0.2-4.5 wt.% graphene and balance copper. USE - The method is for additive manufacturing of copper-based polymorphic high-entropy alloy powder ADVANTAGE - The copper-based meta-crystal high-entropy alloy has high strength and toughness, high heat stability, high radiation resistance, current-carrying abrasion resistance and arc ablation resistance. DETAILED DESCRIPTION - An additive manufacturing of copper-based polymorphic high-entropy alloy powder comprises preparing copper-based polymorphic high-entropy alloy powder as forming powder; treating surface of stainless steel or copper alloy with nickel as base material, placing copper-based polymorphic high-entropy alloy powder in automatic powder feeder, induction heating at 500-900degrees Celsius, positioning the laser beam and coaxial powder nozzle in the induction heating zone, performing coupling of laser heat source and induction heating source, and performing ultra-high-speed laser-induction composite cladding; and performing ultrasonic rolling treatment on each cladding layer formed to refine the microstructure, reduce surface roughness, obtain compressive stress on surface and improve fatigue resistance, raising processing head to the height of one layer along the Z direction, and repeating composite cladding steps. The copper-based polymorphic high-entropy alloy powder comprises 20-35 wt.% molybdenum, 5-15 wt.% niobium, 2-5 wt.% silicon, 2-10 wt.% aluminum, 0.5-5 wt.% hafnium oxide, 0.2-4.5 wt.% graphene and balance copper.