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.

Active Publication Date: 2022-05-17
安徽智模新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem solved by the present invention is that the sputtering method is often used to prepare high-entropy coatings, which have outstanding performance in terms of hardness, wear resistance, corrosion resistance, high temperature oxidation resistance and temper softening resistance, but the process is relatively cumbersome, Insufficient coating bonding strength, poor thermal stability and other defects cannot meet the harsh working conditions of hot forging dies with high temperature and heavy load in practical applications, premature failure of the coating occurs, and the life extension effect is not obvious

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

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Effect test

Embodiment 1

[0065] Preparation method of surface Zr-based high-entropy alloy coating for improving the life of hot forging die, including the following preparation steps:

[0066]Step 1: Select H13 material hot forging mold as the substrate, select 220 mesh corundum sand, 0.6Pa pressure to blast the mold surface, remove the surface oil and passivation layer; use the 500 mesh abrasive polishing machine to grind and polish the mold for 10min; select the automatic ultrasonic cleaning line to clean the mold, the specific process is to heat the lye to 60 °C, spray and clean the hot forging mold for 10 min; and then ultrasonically clean the hot forging mold to 60 °C in the lye for 5 min Take out the hot forging mold for water rinsing; ultrasonically clean the hot forging mold at 60 °C for 10 min; take out the hot forging mold for 5 min of clean water; ultrasonically clean the hot forging mold in pure water for 5 min; dry the hot forging mold after pure water and set aside;

[0067] Step 2: Nitridi...

Embodiment 2

[0075] Preparation method of surface Zr-based high-entropy alloy coating for improving the life of hot forging die, including the following preparation steps:

[0076]Step 1: Select H13 material hot forging mold as the substrate, select 320 mesh corundum sand, 0.8Pa pressure to blast the mold surface, remove the surface oil and passivation layer; use the 500 mesh abrasive polishing machine to grind and polish the mold for 10min; select the automatic ultrasonic cleaning line to clean the mold, the specific process is to heat the lye to 60 °C, spray and clean the hot forging mold for 10 min; and then ultrasonically clean the hot forging mold to 60 °C alkali for 5 min Take out the hot forging mold for water rinsing; ultrasonically clean the hot forging mold at 60 °C for 10 min; take out the hot forging mold for 5 min of clean water; ultrasonically clean the hot forging mold in pure water for 5 min; dry the hot forging mold after pure water and set aside;

[0077] Step 2: Nitriding t...

Embodiment 3

[0085] Preparation method of surface Zr-based high-entropy alloy coating for improving the life of hot forging die, including the following preparation steps:

[0086]Step 1: Select H13 material hot forging mold as the substrate, select 420 mesh corundum sand, 0.6Pa pressure to blast the mold surface, remove the surface oil and passivation layer; use the 500 mesh abrasive polishing machine to grind and polish the mold for 15min; choose the automatic ultrasonic cleaning line to clean the mold, the specific process is to heat the lye to 60 ° C, spray cleaning the hot forging mold for 8min; and then ultrasonically clean the hot forging mold to 60 ° C in the lye for 60 minutes Take out the hot forging mold for rinsing with clean water; ultrasonically clean the hot forging mold at 60 °C for 8min; take out the hot forging mold for 7min; ultrasonically clean the hot forging mold in pure water for 7min; ultrasonically clean the hot forging mold in pure water for 7min; dry the hot forging...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/16C23C14/06C23C14/02C23C8/38
CPCC23C14/325C23C14/025C23C14/16C23C14/0641C23C14/0021C23C14/028C23C14/02C23C8/38Y02T50/60
Inventor 赵中里薛勇杰
Owner 安徽智模新材料科技有限公司
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