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Preparation method of high-temperature-resistant, heat-corrosion-resistant and abrasion-resistant coating and penetrating agent

A preparation process and anti-wear technology, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of inability to improve service life, inability to meet TiAl alloy, harsh service conditions, etc., to achieve good performance, Easy to implement, good coating adhesion effect

Inactive Publication Date: 2015-08-26
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 method of high-temperature-resistant, heat-corrosion-resistant and abrasion-resistant coating and penetrating agent
  • Preparation method of high-temperature-resistant, heat-corrosion-resistant and abrasion-resistant coating and penetrating agent
  • Preparation method of high-temperature-resistant, heat-corrosion-resistant and abrasion-resistant coating and 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 method of a high-temperature-resistant, heat-corrosion-resistant and abrasion-resistant coating and a penetrating agent. The penetrating agent is characterized by comprising the following components in percentage by weight: 6-10 percent of Cr, 4-8 percent of Si, 2-6 percent of Al, 1-2 percent of Y2O3, 6-10 percent of AlCl3 and the balance of Al2O3. The preparation method of the high-temperature-resistant, heat-corrosion-resistant and abrasion-resistant coating and the penetrating agent have the benefits that a Cr-Al-Si-Y penetrating layer is prepared on the surface of a TiAl alloy, the technical problem of poor in high-temperature resistance, heat corrosion resistance and abrasion resistance of the TiAl alloy is solved, the process is stable and reliable, the coating binding force is good, and tissues are uniform and compact; moreover, the penetrating agent has the advantages of being simple in process, convenient in operation, high in efficiency, low in cost, easy in implementation and the like. The binding force is detected by adopting an edge filing method, a scratching method, a friction method and a polishing method, the binding force between a coating layer and a matrix is good, and a high-temperature oxidation test, a frictional wear test and a heat corrosion test show that the coating has excellent 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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IPC IPC(8): C23C4/12C23C4/10C23C4/06
Inventor 李涌泉耿桂宏孙玉芳蒋亮陈炜晔
Owner BEIFANG UNIV OF NATITIES
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