Microstructure and Properties of FeCrMnCuNiSi₁ High Entropy Core Wire Coating by Tungsten Electrode Arc Melting

The powder cored wire of high entropy composition was drawn by powder cored wire forming, equipment and FeCrMnCuNiSi₁ high-entropy alloy was prepared by tungsten arc fusion. The microstructure, mechanical properties, and electrochemical corrosion properties of FeCrMnCuNiSi₁ were investigated. The results show that FeCrMnCuNiSi₁ exhibits a mixture of equiaxed and refined columnar crystal states, and its physical phases are mainly BCC（face-centered cubic） and FCC（body-centered cubic）. The microhardness of the coating is 518.88 HV, which is more than 3 times that of the base material. The wear rate is only 3.80 ×10^-6mm³/（N·mm）, which is less than 1/4 of the wear rate of the base material. The self-corrosion potential of the coating is significantly higher than that of the base material, and the self-corrosion current is about 60% of that of the base material, which has good corrosion resistance. The experimentally used powder cored wire is produced by conventional powder cored wire forming equipment, and the production price is close to that of conventional wire with superior performance, so the method is beneficial to provide an important basis for practical high-entropy coating development, preparation and application.