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High-temperature gradient wear-resistant coating as well as preparation and application thereof

A technology of wear-resistant coatings and wear-resistant layers, which is applied in the field of high-temperature gradient wear-resistant coatings for steel base parts and its preparation, can solve the problem of not being able to further improve the high-temperature wear resistance of materials, and easily generating thermal stress and interface stress , Insufficient wear resistance and other problems, achieve strong thermal stability and anti-aggregation ability, improve high temperature wear stability, reduce thermal stress and interface effects

Active Publication Date: 2022-06-03
长沙市萨普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although intermetallic compounds have better heat resistance than carbides, their wear resistance is slightly insufficient and cannot further improve the high temperature wear resistance of materials
In addition, unlike bulk materials, coating materials also need to consider the performance changes caused by the dilution rate and solve the problems of thermal stress and interface stress between different layers, which are easy to cause crack initiation.

Method used

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  • High-temperature gradient wear-resistant coating as well as preparation and application thereof
  • High-temperature gradient wear-resistant coating as well as preparation and application thereof
  • High-temperature gradient wear-resistant coating as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The raw materials are prepared according to the design plan: among them, the composition and proportion of the bottom layer are 12% Co, 6% Mo, 3% W, 0.5% Ni, 1% Ti, 1% Nb, 1% Cr, and the rest are Fe; the composition of the transition layer and The proportions are 20%Co, 12%Mo, 3%W, 2%WC, 1%TiC, 0.5%Ni, 1%Ti, 1%Nb, 0.5%Cr, and the rest are Fe; the composition and proportion of the wear-resistant layer are 22 %Co, 12%Mo, 4%W, 6%WC, 2%TiC, 0.5%Ni, 1%Ti, 1%Nb, 0.5%Cr, and the rest are Fe. The raw material powder, 0.5% B (based on the weight of the components of each layer), 0.5% Si (based on the weight of the components of each layer), and 3% paraffin (based on the weight of the components of each layer) were put into a roller ball mill for wetness. The ball milling medium is anhydrous ethanol, the ball-to-material ratio is 5:1, the ball milling time is 72h, and the ball milling speed is 150r / min. The ball-milled slurry is sprayed and granulated to obtain 80-150 μm powder,...

Embodiment 2

[0086] The raw materials are prepared according to the design plan: among them, the composition and proportion of the bottom layer are 10% Co, 4% Mo, 1% W, 0.5% Ni, 1% Ti, 1% Nb, 0.5% Cr, and the rest are Fe; the transition layer composition and The proportions are 15%Co, 9%Mo, 1%W, 1%WC, 1%TiC, 0.5%Ni, 1%Ti, 1%Nb, 0.5%Cr, and the rest are Fe; the composition and proportion of the wear-resistant layer are 15% %Co, 9%Mo, 1%W, 4%WC, 1%TiC, 0.5%Ni, 1%Ti, 1%Nb, 0.5%Cr, and the rest are Fe. The raw material powder, 0.5% B (based on the weight of the components of each layer), 0.5% Si (based on the weight of the components of each layer), and 3% paraffin (based on the weight of the components of each layer) were put into a roller ball mill for wetness. The ball milling medium is anhydrous ethanol, the ball-to-material ratio is 5:1, the ball milling time is 72h, and the ball milling speed is 150r / min. The ball-milled slurry is sprayed and granulated to obtain 80-150 μm powder, and t...

Embodiment 3

[0089] The raw materials are prepared according to the design plan: among them, the composition and proportion of the bottom layer are 15% Co, 8% Mo, 2% W, 2% Ni, 2% Ti, 2% Nb, 2% Cr, and the rest are Fe; the composition of the transition layer and The proportions are 25%Co, 15%Mo, 5%W, 4%WC, 1%TiC, 2%Ni, 2%Ti, 2%Nb, 2%Cr, and the rest are Fe; the composition and proportion of the wear-resistant layer are 25% %Co, 15%Mo, 5%W, 4%WC, 4%NbC, 2%TiC, 2%Ni, 2%Ti, 2%Nb, 2%Cr, and the rest are Fe. The raw material powder, 0.5% B (based on the weight of the components of each layer), 0.5% Si (based on the weight of the components of each layer), and 3% paraffin (based on the weight of the components of each layer) were put into a roller ball mill for wetness. The ball milling medium is anhydrous ethanol, the ball-to-material ratio is 5:1, the ball milling time is 72h, and the ball milling speed is 150r / min. The ball-milled slurry is sprayed and granulated to obtain 80-150 μm powder, a...

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Abstract

The invention belongs to the field of wear-resistant materials, and particularly discloses a high-temperature gradient wear-resistant coating which comprises a bottom layer, a transition layer, a wear-resistant layer and a vulcanization layer formed by vulcanization on the surface of the wear-resistant layer. The bottom layer comprises a martensite matrix and an intermetallic compound dispersed in the martensite matrix; each of the transition layer and the wear-resistant layer comprises a martensite matrix as well as an intermetallic compound and a carbide which are dispersed and distributed in the martensite matrix; wherein the content of intermetallic compounds in the transition layer and the wear-resistant layer is greater than the content of intermetallic compounds in the bottom layer; and the content of carbide in the wear-resistant layer is greater than that in the transition layer. The invention further comprises preparation and application of the coating, a wear-resistant material with the coating and preparation of the wear-resistant material. The research finds that the intermetallic compound and carbide double-gradient controlled hierarchical coating has excellent synergism, and the high-temperature (such as 700 DEG C) wear resistance of the coating can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a high-temperature gradient wear-resistant coating for steel base parts and a preparation method thereof. Background technique [0002] Wear is one of the main failure forms of mechanical parts. The resource consumption caused by wear failure is very huge. According to statistics, the economic loss caused by friction and wear in my country is more than 100 billion yuan every year. Especially under high temperature conditions, due to the decrease of material hardness and oxidation, severe adhesive wear and oxidative wear will occur, resulting in severe wear failure. For example, hot work die steel H13 is often used at high temperature and requires high high temperature wear resistance. However, when the temperature exceeds 600 °C, its hardness drops sharply, and severe plastic extrusion wear occurs and fails. Preparing alloy coatings with high hardness, high wear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C23C8/08C23C8/80C22C38/52C22C38/44C22C38/50C22C38/48B22F9/02B22F9/04B22F1/142C23C28/00
CPCC23C24/103C23C24/106C23C8/08C23C8/80C22C38/52C22C38/44C22C38/50C22C38/48B22F9/026B22F9/04C23C28/321C23C28/324C23C28/325C23C28/347B22F2009/043
Inventor 谢丰伟陈帅鹏康希越张乾坤陈豫章
Owner 长沙市萨普新材料有限公司
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