High-entropy alloy solid wire for arc cladding and preparation method thereof

Abstract

The invention discloses a high-entropy alloy solid wire for arc cladding. The solid wire is a high-entropy alloy composed of 5 base elements: Co, Cr, Fe, Mn and Ni and a non-base element: Er. The preparation method comprises the following steps: (1) ball milling: weighing Co powder, Cr powder, Fe powder, Ni powder, Mn powder and Er powder according to molar fractions, and adding the powder into ahigh-energy ball mill for ball milling; (2) spray deposition molding: melting the high-entropy alloy powder, atomizing and depositing the solution into a cylindrical mold with high-pressure argon to obtain a high-entropy alloy bar; (3) cryogenic treatment: soaking the high-entropy alloy bar in liquid nitrogen at -196 DEG C for 48 h; (4) extrusion process: extruding the high-entropy alloy bar tilla diameter is phi 20 mm, and naturally heating the alloy bar to room temperature; (5) wire drawing process: soaking the extruded high-entropy alloy bar in the liquid nitrogen at -196 DEG C for 24 hours, performing wire drawing and reduction for multiple times, and finally obtaining the solid wire with the diameter of phi 2 mm.

Description

technical field [0001] The invention belongs to the field of material processing engineering arc cladding, and in particular relates to a high-entropy alloy solid wire for arc cladding and a preparation method thereof. Background technique [0002] In the 1990s, Professor Ye Junwei from Taiwan, China, took the lead in proposing an alloy design concept of a multi-principal element high-entropy alloy. There are at least five main elements in the alloy, and the atomic percentage of each main element is between 5% and 35%. The mole percentages of element atoms are similar, and none of the elements in the atomic percentage will exceed 50% as the dominant element, which is called a multi-principal high-entropy alloy. Compared with traditional alloys, the mixing entropy of high-entropy alloys is very high, and the slow atomic diffusion in kinetics inhibits the formation of metal compounds, and the crystal phase structure is simple body-centered cubic or face-centered cubic. Theref...

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Problems solved by technology

[0005] The present invention aims at the above shortcomings and starts from improving the nature of the material and the forming method. The high-entropy alloy is composed of 5 elementary elements Co, Cr, Fe, Mn, Ni and 1 non-elementary rare earth element bait (Er), which is obtained by spray deposition molding The structure and composition are uniform, forming a single face-centered cubic crystal structure super solid solution structure, extruding and drawing high-entropy alloy rods under ultra-low temperature conditions through cryogenic treatment, overcoming the low plasticity and high brittleness of high-entropy alloys at room temperature, which is difficult to plastically form wires Fabrication of a high-entropy alloy solid wire for arc cladding

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