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Preparation process of a high temperature resistant, heat resistant, corrosion resistant and wear resistant coating and its penetrating agent

A preparation process and anti-wear technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems that cannot satisfy TiAl alloy, cannot improve service life, harsh service conditions, etc., and achieve good performance , easy to implement, good coating adhesion

Inactive Publication Date: 2017-09-12
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are mainly the following problems: oxidation, wear and hot corrosion damage occur simultaneously in the service conditions of TiAl alloys, and the solution to a single problem cannot meet the harsh service conditions of TiAl alloys, nor can it improve its service life

Method used

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  • Preparation process of a high temperature resistant, heat resistant, corrosion resistant and wear resistant coating and its penetrating agent
  • Preparation process of a high temperature resistant, heat resistant, corrosion resistant and wear resistant coating and its penetrating agent
  • Preparation process of a high temperature resistant, heat resistant, corrosion resistant and wear resistant coating and its penetrating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054]①Alkali washing: put the TiAl alloy sample in an alkali washing solution with a temperature of 65°C (0.1mol / L sodium hydroxide solution for the alkali washing solution) and soak for 10 minutes; ②Water washing: use the sample after alkali washing Rinse with running water; blow dry; ③ preparation of osmotic agent: accurately weigh the osmotic agent according to the amount, and the proportion of the osmotic agent is by weight percentage: 8% Cr powder, 6% Si powder, 4% Al powder, 8% AlCl 3 powder (analytical pure), 2% Y 2 o 3 powder, and the rest is Al2O3 powder (≤200 mesh); ④Ball milling: Grind the prepared penetrating agent in a ball mill to make it fully mixed, and refine the penetrating agent particles to no more than 200 mesh; The infiltrating agent after ball milling is placed in an oven at 100°C for 1 hour and dried; ⑥ Embedding: put the dried infiltrating agent into a corundum crucible, embed the sample in the infiltrating agent, and make the adjacent Keep a certai...

Embodiment 2

[0056] ①Alkali cleaning: put the TiAl alloy test sample in an alkali washing solution with a temperature of 65°C (0.1-0.2mol / L sodium hydroxide solution for the alkali washing solution) and soak for 10 minutes; ②Water washing: Wash the Rinse the sample with flowing water; dry it; ③ Prepare the osmotic agent: accurately weigh the osmotic agent according to the amount, and the proportion of the osmotic agent is as follows: 8% Cr powder, 6% Si powder, 4% Al powder, 8% AlCl 3 powder (analytical pure), 2% Y 2 o 3 powder, and the rest is Al2O3 powder (≤200 mesh); ④Ball milling: Grind the prepared penetrating agent in a ball mill to make it fully mixed, and refine the penetrating agent particles to no more than 200 mesh; The infiltrating agent after ball milling is placed in an oven at 100°C for 1 hour and dried; ⑥ Embedding: put the dried infiltrating agent into a corundum crucible, and embed the sample in the infiltrating agent. Keep a certain distance between them (≥5cm), ⑦Seal...

Embodiment 3

[0058] ①Alkali cleaning: put the TiAl alloy test sample in an alkali washing solution with a temperature of 65°C (0.1-0.2mol / L sodium hydroxide solution for the alkali washing solution) and soak for 10 minutes; ②Water washing: Wash the Rinse the sample with flowing water; dry it; ③ Prepare the osmotic agent: accurately weigh the osmotic agent according to the amount, and the proportion of the osmotic agent is as follows: 8% Cr powder, 6% Si powder, 4% Al powder, 8% AlCl 3 powder (analytical pure), 2% Y 2 o 3 powder, and the rest is Al2O3 powder (≤200 mesh); ④Ball milling: Grind the prepared penetrating agent in a ball mill to make it fully mixed, and refine the penetrating agent particles to no more than 200 mesh; The infiltrating agent after ball milling is placed in an oven at 100°C for 1 hour and dried; ⑥ Embedding: put the dried infiltrating agent into a corundum crucible, and embed the sample in the infiltrating agent. Keep a certain distance between them (≥5cm), ⑦Seal...

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Abstract

The invention relates to a preparation process of a high-temperature-resistant, heat-resistant, corrosion-resistant, and wear-resistant coating and a penetrating agent thereof. It is characterized in that, according to the weight percentage, its composition is: 6%-10%Cr, 4%-8%Si, 2%-6%Al, 1%-2%Y2O3, 6%-10%AlCl3, and the balance is Al2O3 . The beneficial effects of the present invention are: the present invention prepares a Cr-Al-Si-Y infiltrated layer on the surface of the TiAl alloy, which solves the technical problem of poor high temperature resistance, heat corrosion resistance and wear resistance of the TiAl alloy, the process is stable and reliable, and the coating bonding force Good, uniform and dense structure; and has the advantages of simple process, convenient operation, high efficiency, low cost, and easy realization. The bonding force was detected by methods such as file edge method, scratch method, friction method and polishing method. The coating and the substrate showed very good bonding force. High temperature oxidation test, friction and wear test and thermal corrosion test showed that the coating has good adhesion. performance.

Description

technical field [0001] The invention relates to a preparation process of a high-temperature-resistant, heat-resistant, corrosion-resistant, and wear-resistant coating and a penetrating agent thereof. Background technique [0002] TiAl intermetallic compounds have the characteristics of high specific strength, specific stiffness, and high creep resistance, and are one of the strong competitors for high-temperature structural materials for high-performance gas turbine engines in the future. However, the TiAl alloy has poor oxidation resistance and insufficient wear resistance, which makes it difficult to meet the requirements of its use at high temperatures. At the same time, in the hydrochloric acid hot corrosion environment exceeding 800 ° C, the TiAl alloy will quickly cause material failure and destruction due to corrosion. , so it is necessary to prepare a coating on the surface of the alloy to improve its above-mentioned properties. [0003] In recent years, research on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/56
Inventor 李涌泉耿桂宏孙玉芳蒋亮陈炜晔
Owner BEIFANG UNIV OF NATITIES