CPC C22C 38/42 (2013.01) [C22C 33/006 (2013.01); C22C 33/0207 (2013.01)] | 6 Claims |
1. A preparation method of a multi-functional marine engineering alloy, comprising the following steps:
performing a mixed ball milling step comprising:
weighing Co—Cr—Fe—Ni face-centered cubic (FCC)-based high-entropy alloy powder and Cu powder separately;
loading the weighed Co—Cr—Fe—Ni FCC-based high-entropy alloy powder and Cu powder into a ball milling tank for mixed ball milling; and
conducting drying treatment after the ball milling to obtain a mixed powder;
performing a high-temperature sintering step to promote mutual solubility, the high-temperature sintering step comprising:
loading the obtained mixed powder into a graphite die, placing the graphite die in a spark plasma sintering (SPS) furnace;
conducting pressure sintering in a vacuum environment or under protection of inert gas at 1,000-1,500° C. to obtain a sintered material; and
cooling the sintered material to a room temperature with the furnace after the sintering; and
performing a heat treatment step to induce nano-precipitation, the heat treatment step comprising:
placing the sintered material in a heat treatment furnace;
conducting heat preservation heat treatment at 650-950° C.; and
water cooling or cooling with the furnace after the heat treatment to obtain the multi-functional marine engineering alloy,
wherein components of the Co—Cr—Fe—Ni FCC-based high-entropy alloy are in equimolar or nearly molar ratios and have molar percentages of Co(a)Cr(b)Fe(c)Ni(d), a+b+c+d=100, 30≥a≥20, 30≥b≥20, 30≥c≥20, 30≥d≥20, and
a percentage of the Cu powder in the mixed powder of the Co—Cr—Fe—Ni FCC-based high-entropy alloy powder and the Cu powder is 5-20 wt. %.
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