High-temperature-resistant high-entropy alloy tool steel coating material and preparation method of coating

Abstract

The invention discloses a high-temperature-resistant high-entropy alloy tool steel coating material and a preparation method of a coating. The coating material comprises, by weight, 20-25 parts of Fepowder, 20-25 parts of Cr powder, 20-25 parts of Co powder, 10-15 parts of W powder, 7-10 parts of Mo powder, 7-10 parts of Nb powder, 3-5 parts of Ti powder and 2-5 parts of Si powder. The method includes the steps that the coating material is ground, then the surface of tool steel is coated with the coating material, laser cladding is conducted on the coating material through a laser, and the coating is obtained. The coating has the characteristics that the abrasion resistance is good at a high temperature, the binding force with a matrix is good, peeling off is not prone to occurring, fragility is low, the surface is smooth, higher surface dimension precision and surface roughness requirements of a workpiece can be met, and the preparation process is simple.

Description

technical field [0001] The invention relates to a tool steel coating material and a preparation method of the coating, in particular to a high-temperature-resistant high-entropy alloy tool steel coating material and a preparation method of the coating. Background technique [0002] High-speed tool steel (also known as front steel) is usually used as a high-speed cutting tool. Usually, high-speed cutting tools require excellent wear resistance, good impact resistance, extremely high red hardness and excellent cutting ability. The cutting speed of high-speed steel tools is 5 to 10 times that of conventional tools. Extremely high cutting speeds will cause local high temperature, high pressure, severe friction and high-frequency periodic changes in the thermal stress of the tool, thereby accelerating the wear of the tool. This results in shorter tool life. Therefore, the main reason for the failure of high-speed cutting tools is the insufficient high-temperature performance of ...

AI Technical Summary

Problems solved by technology

Specifically: 1. The tool steel processed by the prior art has low hardness when it is above 800°C, is not wear-resistant, and has poor high temperature resistance; 2. The coating material of the prior art has poor bonding with the substrate and is easy to peel off; 3. After nitriding, the tool steel has small deformation, good thermal stability and corrosion resistance, but the nitriding depth is shallow, and nitrogen will increase the brittleness of tool steel; dimensional accuracy and surface roughness requirements; 5. The existing coating technology is complicated

In summary, the existing technologies more or less have poor wear resistance at high temperatures, poor bonding with the substrate, easy peeling, or high brittleness, or rough surface, which cannot meet the high dimensional accuracy and surface roughness requirements of the workpiece surface. , or defects in complex manufacturing processes

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