Alloy powder for manufacturing high-entropy alloy coatings, and manufacturing method and application for alloy powder

Abstract

The invention discloses alloy powder for manufacturing high-entropy alloy coatings, and a manufacturing method and application for the alloy powder. The alloy powder comprises raw material powder including, by mole percent, 10%-20% of molybdenum, 10%-20% of iron, 10%-20% of chromium, 0-15% of titanium, 10%-20% of tungsten, 5%-20% of silicon, 0-10% of boron, 10%-20% of cobalt and 0-15% of aluminum. The alloy powder, the manufacturing method and the application have the advantages that the alloy powder is applicable to surface laser cladding modification for iron-based materials, heat cracking cannot occur easily in cladding procedures, cladding layers which is fine in structure, free of holes and high in bonding strength can be effectively formed, and structural stress and heat stress on the cladding layers in the laser cladding procedures can be reduced; after the alloy powder is subjected to cladding, the laser cladding layers are fine in structure and free of holes and cracking, and the bonding strength between each cladding layer and a base material is high; the formed cladding layers are high in hardness, abrasion resistance, corrosion resistance and fatigue resistance.

Description

technical field [0001] The invention relates to an alloy powder for preparing a high-entropy alloy coating, a preparation method and application thereof, and belongs to the technical field of metallurgy. Background technique [0002] So far, humans have developed more than 30 practical alloy systems, but each alloy system with different properties is based on a metal element, which is prepared by adding a small amount of specific alloy elements and using different processing techniques. Moreover, this alloy design concept based on one metal element obviously limits the design of the alloy system, making the development of the alloy industry encounter a bottleneck. [0003] The proposal of high-entropy alloys broke this situation, greatly enriched the types of alloy systems, and brought unprecedented development to the alloy industry. The so-called high-entropy alloy refers to an alloy composed of more than five main elements, and the mole percentage of each element is 5% to...

AI Technical Summary

Problems solved by technology

[0005] (1) The alloy powder is composed of metal elements. Although the metal elements can form a solid solution with each other to form a high-entropy alloy, the difference in atomic radius of the selected metal elements is small and cannot cause huge lattice distortion. High-hardness high-entropy alloy powders and coatings cannot be obtained;

[0006] (2) A "high-entropy alloy powder material for supersonic spraying and its preparation method" is prepared through the steps of: raw material powder - high-entropy alloy - high-entropy alloy powder - high-entropy alloy coating layer; "A Preparation Method of Plasma Cladding High-Entropy Alloy Coating" is to prepare high-entropy alloy coating by plasma cladding; but the above preparation processes are relatively complicated, which greatly increases the production cost

[0007] In addition, there is no relevant report on the preparation of high-entropy alloy coatings on the surface of iron-based materials (such as iron-based carbon steel and medium- and low-alloy steel) with excellent performance.