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TiAl-based abrasion-resistant laser cladding coating powder and preparation method thereof

A laser cladding and coating technology, applied in the field of surface modification of laser cladding metal materials, can solve the problems of low bonding strength, poor wettability, and many coating cracks, achieve high hardness, good wear resistance, reduce Splash and Volatile Effects

Inactive Publication Date: 2019-05-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the second phase is directly added to the powder, there are usually problems such as low bonding strength and poor wettability, and the in-situ reaction of the second phase by laser cladding can greatly reduce such problems, and the reaction interface is free of pollution. Good phase and matrix wettability
[0005] But at present, laser cladding has not yet achieved industrialization, and the unstable quality of laser cladding coating is one of the major reasons
There are many cracks in the coating and many pores are two main problems in the coating

Method used

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  • TiAl-based abrasion-resistant laser cladding coating powder and preparation method thereof
  • TiAl-based abrasion-resistant laser cladding coating powder and preparation method thereof
  • TiAl-based abrasion-resistant laser cladding coating powder and preparation method thereof

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Effect test

Embodiment 1

[0035] The TiAl-based wear-resistant laser cladding coating powder is composed of the following mass percentage components: TiAl master alloy powder 86.5%, Si powder 10%, HfO 2 Powder 1%, La 2 o 3 Powder 1%, B powder 1%, CeO 2 Powder 0.5%.

[0036] The TiAl master alloy powder, Si powder, HfO 2 Powder, La 2 o 3 powder, B powder and CeO 2 The powder purity is above 99.5%, and the average particle size is 150 mesh. The above components are commercially available products.

[0037] The preparation method of the TiAl-based wear-resistant laser cladding coating powder, the steps include:

[0038] Step 1. Polish the metal substrate with sandpaper until the surface of the substrate is smooth, clean it with alcohol-acetone solution, and dry it for later use; the metal substrate is a titanium alloy (TC4 titanium alloy), and its chemical composition is shown in Table 1; polished and cleaned Specific steps: use 200# sandpaper on the surface of the metal substrate to polish the o...

Embodiment 2

[0046] The TiAl-based wear-resistant laser cladding coating powder is composed of the following mass percentage components: TiAl master alloy powder 60.5%, Si powder 20%, HfO 2 Powder 10%, La 2 o 3 Powder 5%, B powder 3%, CeO 2 Powder 1.5%.

[0047] The TiAl master alloy powder, Si powder, HfO 2 Powder, La 2 o 3 powder, B powder and CeO 2 The powder purity is above 99.5%, and the average particle size is 100 mesh. The above components are commercially available products.

[0048] The preparation method of the TiAl-based wear-resistant laser cladding coating powder, the steps include:

[0049] Step 1. Polish the metal substrate with sandpaper until the surface of the substrate is smooth, clean it with alcohol-acetone solution, and dry it for later use; the metal substrate is a titanium alloy (TC4 titanium alloy), and its chemical composition is shown in Table 1; polished and cleaned Specific steps: use 200# sandpaper on the surface of the metal substrate to polish the ...

Embodiment 3

[0055] The TiAl-based wear-resistant laser cladding coating powder is composed of the following mass percentage components: TiAl master alloy powder 73%, Si powder 15%, HfO 2 Powder 5%, La 2 o 3 Powder 4%, B powder 2%, CeO 2 Powder 1%.

[0056] The TiAl master alloy powder, Si powder, HfO 2 Powder, La 2 o 3 powder, B powder and CeO 2 The powder purity is above 99.5%, and the average particle size is 200 mesh. The above components are commercially available products.

[0057] The preparation method of the TiAl-based wear-resistant laser cladding coating powder, the steps include:

[0058] Step 1. Polish the metal substrate with sandpaper until the surface of the substrate is smooth, clean it with alcohol-acetone solution, and dry it for later use; the metal substrate is a titanium alloy (TC4 titanium alloy), and its chemical composition is shown in Table 1; polished and cleaned Specific steps: use 200# sandpaper on the surface of the metal substrate to polish the oxide...

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Abstract

The invention relates to TiAl-based abrasion-resistant laser cladding coating powder and a preparation method thereof, and belongs to the technical field of laser cladding metal material surface modification. The TiAl-based abrasion-resistant laser cladding coating powder is composed of the following components of, by mass, 60.5%-86.5% of TiAl intermediate alloy powder, 10%-20% of Si powder, 1%-10% of HfO2 powder, 1%-5% of La2O3 powder, 1%-3% of B powder and 0.5%-1.5% of CeO2 powder. A coating which has high hardness and high abrasion resistance and is metallurgically bonded with a substrate is prepared on the titanium alloy substrate.

Description

technical field [0001] The invention relates to a TiAl-based wear-resistant laser cladding coating powder and a preparation method thereof, belonging to the technical field of surface modification of laser cladding metal materials. Background technique [0002] Various fields such as aerospace, petrochemical, automobile and shipbuilding, and military chemical industry. However, the wear resistance and oxidation resistance of titanium alloys will be greatly reduced at high temperatures, especially at working conditions above 400 °C, causing failure, which limits its further application. For example, aircraft parts have been in service for a long time in a high-temperature and high-pressure environment, and they often fail due to wear or oxidation. [0003] In order to improve the hardness and wear resistance of titanium and titanium alloy surfaces, whether it is traditional surface strengthening metal surface treatment methods represented by thermal infiltration, electroplat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00C22C32/00C22C14/00
Inventor 刘洪喜赵艳爽张晓伟张璐璐
Owner KUNMING UNIV OF SCI & TECH
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