A Zr-based high-entropy alloy coating that improves the life of a hot forging die and its preparation method

A technology of hot forging die and high-entropy alloy, which is applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problem of high temperature, heavy load, insufficient coating bonding strength and life extension effect of hot forging die. It can achieve the effect of improving high temperature softening resistance and corrosion resistance, excellent thermal stability, and improving diffusion barrier properties.
CN113025966BActive Publication Date: 2022-05-17安徽智模新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
安徽智模新材料科技有限公司
Publication Date
2022-05-17

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Abstract

The embodiment of the invention discloses a Zr-based high-entropy alloy coating and a preparation method thereof for improving the service life of a hot forging die, belonging to the technical field of metal surface treatment. The Zr-based high-entropy alloy coating refers to the primer layer, the transition layer and the functional layer, and the thicknesses are respectively 200-400nm, 2000-4000nm, and 1000-2000nm. The film layer of the present invention is composed of multi-principal elements with different atomic radii, and has a compact structure, which reduces the diffusion channels of atoms, improves the diffusion barrier performance of the coating, and reduces the diffusion wear of the mold, and the composition is from the substrate to the surface of the film layer. The content of nitrides in the ZrTiN~AlCrSiN transition layer increases linearly and continuously, which improves the matching of the film structure and performance. There is no composition difference interface in the film layer, which ensures high adhesion, high hardness and Simultaneous realization of high thermal shock resistance.
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Description

Technical field

[0001] The present invention belongs to the field of metal surface treatment technology, in particular to the surface Zr base high entropy alloy coating and method for improving the life of the hot forging die. Background

[0002] Long-life forging mold manufacturing technology has become a common problem and a "card neck" technical bottleneck in the automated production of the forging industry, and it is urgent to overcome it as soon as possible.

[0003] Forging process, the mold and hot metal direct contact, its failure is a heat (temperature) - force (friction) - chemical medium (lubricant) and other factors for a long time caused by nonlinear dynamics, is the result of a variety of failure mechanism coupling, the use of the mold often appear wear, fatigue, oxidation, fracture and plastic deformation and other failure forms, and failure often begins on the surface, the existing homogeneous hot forging mold materials are difficult to meet the hot forging mold ...

Claims

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