High-entropy alloy coating preparation technology of tool die

Abstract

The invention provides a high-entropy alloy coating preparation technology of a tool die, which comprises the following steps of: preparing a NiCoFeCrTi high-entropy alloy material from Ni, Co, Fe, Cr and Ti at an equimolar proportion; sputtering a high-entropy alloy nitride film coating on a hard alloy base body by a radio-frequency magnetron sputtering method by taking the NiCoFeCrTi high-entropy alloy material and a single element material as target materials; and finally, putting the high-entropy alloy nitride film coating in an air atmosphere furnace, oxidizing at 500-1,000 DEG C in the air atmosphere furnace for 1 hour, introducing nitrogen and performing heat treatment at 500-1,000 DEG C for 1 hour. The high-entropy alloy coating preparation technology of a tool die provided by the invention obviously improves the hardness, wear resistance and toughness of the coating while guaranteeing good high-temperature stability of the coating and high binding strength with the base body.

Description

technical field [0001] The invention relates to a coating preparation technology on a tool and mold, in particular to a preparation technology of a high-entropy alloy coating on a tool and mold. Background technique [0002] In recent years, difficult-to-machine materials, molds, and some products have no cutting fluid processing requirements, resulting in high-speed cutting, heavy cutting, and processing environments where the temperature of the workpiece heats up very quickly. Damage and serious wear of the mold surface, etc., reduce the service life of the tool and mold, and the surface roughness of the tool and mold is very poor. [0003] In recent years, tool and mold coating technology has developed rapidly. The combination of tool and mold materials and nanostructure coating technology has further expanded the processing range of tools. Coated tool and mold materials are high-speed cutting, hard cutting, dry cutting and repeated friction and wear. create conditions f...

AI Technical Summary

Problems solved by technology

[0004] Currently commonly used coating materials are TiC, TiN, Ti(C,N), and TiAlN series. Although this type of coating has good high temperature stability and high bonding strength with the substrate, the hardness and wear resistance of this coating Compared with cemented carbide, there are still many technical problems to be solved in large-scale production, including the strength of the thick film itself and the bonding strength between the thick film and the substrate.