Titanium alloy flexible package wear-resistant coating and preparation method thereof

A technology of wear-resistant coating and titanium alloy, which is applied in the direction of metal material coating process and coating, can solve the problems of poor wear resistance of titanium alloy, and achieve the effects of low cost, improved wear resistance and easy control

Active Publication Date: 2021-07-09
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a wear-resistant coating for titanium alloy soft packaging to solve the problem of poor wear resistance of titanium alloys in the prior art

Method used

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  • Titanium alloy flexible package wear-resistant coating and preparation method thereof
  • Titanium alloy flexible package wear-resistant coating and preparation method thereof
  • Titanium alloy flexible package wear-resistant coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Put the Al-15Si alloy powder with a particle size of 100 mesh into the synchronous powder feeder of the plasma welder, and use the plasma welder to weld the cladding coating on the surface of the TC4 titanium alloy in the form of continuous plasma welding. The welding current is 65A, and send The powder gas flow rate is 3.5 1atm Nl / min. If the multi-pass welding process is performed, the completed cladding layer should be cleaned of slag before the next cladding layer is welded to ensure that the coating surface is smooth. When performing welding cladding, the overlapping of the next cladding layer and the previous cladding layer should not be less than 1 / 2. The target Al-Si soft packaging wear-resistant coating can be prepared.

[0033] Such as figure 1 As shown, the composition of the coating is primary Si and (α+Si) eutectic structure, and there is a metallurgical bond between the coating and the substrate. The primary silicon is evenly distributed in the coating,...

Embodiment 2

[0035] Put the Al-25Si alloy powder with a particle size of 100 mesh into the synchronous powder feeder of the plasma welder, and use the plasma welder to weld the cladding coating on the surface of the TC4 titanium alloy in the form of continuous plasma welding, with a welding current of 60A. The powder gas flow rate is 3.5 1atm Nl / min, and the target Al-Si flexible packaging wear-resistant coating is prepared, and the silicon is evenly distributed in the coating.

[0036] A kind of TC4 titanium alloy Al-Si soft packaging wear-resistant coating of the present invention, as image 3 As shown, on the cross-section of this coating, the microhardness analysis was carried out. In the coating, α-Al is the main component of the coating, with a hardness of 60-100HV, and the reason for the high hardness of the structure in the transition zone is the Ti-Al-based metal formed in the interface bonding zone between the coating and the substrate. inter-compound, which has the characterist...

Embodiment 3

[0038] Put the Al-15Si alloy powder with a particle size of 100 mesh into the synchronous powder feeder of the plasma welder, and use the plasma welder to weld the cladding coating on the surface of the TC4 titanium alloy in the form of continuous plasma welding, with a welding current of 60A. The powder gas flow rate is 3.5 1atm Nl / min, and the target Al-Si flexible packaging wear-resistant coating is prepared, and the silicon is evenly distributed in the coating. It was found that the wear resistance of the coating was three times that of the base TC4 titanium alloy.

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Abstract

The invention discloses a titanium alloy flexible package wear-resistant coating and a preparation method thereof, and solves the problem of wear resistance of a titanium alloy. The components of the coating are primary Si and (alpha+Si) eutectic structures, and the component of the coating-matrix bonding interface structure is a Ti-Al intermetallic compound. The coating has good wear resistance, the hardness from the surface of the coating to a matrix shows the characteristic of flexible package, the hardness of the coating part is lower than that of the titanium alloy matrix, but the wear resistance of the coating part is greatly improved compared with that of the titanium alloy matrix. The coating is prepared through a plasma welding and synchronous powder feeding cladding technology, the technological method is easy to implement, the technological process can be controlled, and the technological forming quality is high.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium alloy wear-resistant coatings, and in particular relates to a titanium alloy soft packaging wear-resistant coating and a preparation method thereof. Background technique [0002] Titanium alloy is an important structural material. The density of titanium (4.5g / cm3) is lower than that of steel, which meets the needs of aerospace products for lightweight materials; the strength of titanium alloy (500-1400Mpa) is much higher than that of Al, Mg Alloys, titanium alloys have high high temperature and low temperature resistance, titanium alloys can work for a long time under the conditions of 550 ℃ high temperature and -250 ℃ low temperature, and are called "modern metals" and "space metals". Titanium and titanium alloys are widely used in aerospace, aviation, petroleum, chemical and other industrial sectors due to their small specific gravity, high specific strength, corrosion resistanc...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 林成彭贤民李飞
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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