Manufacturing method of aluminum-cobalt-chromium-iron-nickel high-entropy alloy

Abstract

The invention relates to a manufacturing method of aluminum-cobalt-chromium-iron-nickel high-entropy alloy. By means of the combination of mechanical ball milling, low-temperature hot pressed sintering and vacuum melting, the aluminum-cobalt-chromium-iron-nickel high-entropy alloy is manufactured and comprises an FCC+BCC bi-phase structure, the BCC phase serves as the precipitated phase and is distributed in the substrate FCC phase, the vickers hardness is 232HV, and the yield strength is 432 MPa. The manufacturing method is advanced in technology and accurate and detailed in technical parameter. The manufactured aluminum-cobalt-chromium-iron-nickel high-entropy alloy is excellent in performance and has the high application value and the broad application range, and the manufacturing method is an advanced manufacturing method.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-cobalt-chromium-iron-nickel high-entropy alloy, which belongs to the technical field of preparation and application of nonferrous metal alloys. Background technique [0002] High entropy alloy is a new type of alloy, because of its high strength, corrosion resistance, wear resistance, high plasticity and other advantages, it has been favored by researchers; the current research on high entropy alloys is mainly focused on bulk, In terms of powder and coating, the processes used mainly include vacuum melting, mechanical alloy powder making, hot pressing sintering, laser cladding, thermal spraying, magnetron sputtering, etc.; mechanical alloying ball milling technology can effectively control the particle size of alloy powder, The powder is mixed evenly, but the ball milling time is long and the efficiency is low. The hot pressing sintering adopts the method of pressing and heating at the same ti...

AI Technical Summary

Problems solved by technology

[0002] High entropy alloy is a new type of alloy, because of its high strength, corrosion resistance, wear resistance, high plasticity and other advantages, it has been favored by researchers; the current research on high entropy alloys is mainly focused on bulk, In terms of powder and coating, the processes used mainly include vacuum melting, mechanical alloy powder making, hot pressing sintering, laser cladding, thermal spraying, magnetron sputtering, etc.; mechanical alloying ball milling technology can effectively control the particle size of alloy powder, The powder is mixed evenly, but the ball milling time is long and the efficiency is low. The hot pressing sintering adopts the method of pressing and heating at the same time, which reduces the melting temperature, makes the alloy forming and heating together, and shortens the sintering process. time, resists grain growth and improves alloy properties; however, the surface of the alloy prepared by hot pressing is rough and the precision is low, which requires further processing of the material. Larger; the main feature of vacuum arc melting technology is its simple preparation and short production cycle, but the uneven melting of alloys requires multiple repeated meltings, which causes serious problems of volatilization of low melting point elements; these processes are high-performance high-entropy alloys. At present, the research on the preparation process of new high-entropy alloys is still in the exploratory stage

Images