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Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating

A phase content, wear-resistant technology, applied in the direction of coating, metal material coating process, melt spraying, etc., can solve the problem of difficult to prepare coatings, to avoid changes, excellent mechanical properties and wear resistance, low Effect of oxygen/nitrogen impurity phase content

Inactive Publication Date: 2016-10-26
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-γ-TiAl phase-content wear-resistant coating and its preparation method in view of the technical problem that it is difficult to prepare coatings from powder materials with high γ-TiAl phase content in the prior art

Method used

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  • Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating
  • Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating
  • Abrasion resisting coating with high gamma-TiAl phase content and preparing method of abrasion resisting coating

Examples

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Embodiment 1）

[0016] The wear-resistant coating with high γ-TiAl phase content in this embodiment is composed of 45 at% of Al, 5 at% of Nb, 5 at% of V and the balance of Ti (hereinafter abbreviated as Ti-45Al-5Nb-5V) .

[0017] The phase composition of the coating is as follows: γ-TiAl phase content is 78.7wt%, α 2 -Ti 3 The content of Al phase is 14.2wt%, the content of β-Ti phase is 7.1wt%, and there is no obvious oxygen / nitrogen impurity phase.

[0018] The preparation method of the wear-resistant coating with high γ-TiAl phase content of the present embodiment is as follows:

[0019] ① According to the above atomic percentages, the master alloy AlNb, AlV, Al particles and Ti rods with a purity of ≥ 99.9% are mixed and then added to the vacuum arc melting furnace to be smelted into bulk materials, and then the above bulk materials are prepared by gas atomization pulverizing equipment. A powder material is prepared, and a spray powder with a particle size of 15-40 μm is obtained by sie...

Embodiment 2

[0023] The coating compositions of Examples 2 and 3 are shown in Table 1, and the preparation methods thereof are basically the same as those of Example 1, and the differences are shown in Table 1.

[0024] Wherein, the scanning electron microscope (SEM) diagram of the sprayed powder of Example 3 is shown in figure 1 , the schematic diagram of the cross-sectional micro-morphology of the coating prepared in Example 3 is shown in figure 2 .

[0025] Table 1

[0026]

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Abstract

The invention discloses an abrasion resisting coating with the high gamma-TiAl phase content and a preparing method of the abrasion resisting coating. The coating comprises, by atomic percent, 42 at%-45 at% of Al, 5 at%-10 at% of Nb, 5 at%-10 at% of Cr and / or V, and the balance Ti. A phase of the coating comprises 75 wt%-90 wt% of a gamma-TiAl phase, 5 wt%-15 wt% of an alpha 2-Ti3Al phase and 5 wt%-10 wt% of a beta-Ti phase and is free of obvious oxygen / nitrogen impurity phases. According to the coating, intermediate alloy AlNb, AlV, AlCr and Al particles and Ti bars with the purity larger than or equal to 99.9% are mixed to manufacture spraying powder firstly, and then the spraying powder is sprayed to the surface of a magnesium alloy base body through the low-temperature supersonic spraying technology. According to the abrasion resisting coating, the powder material composition and grain size are optimized, and the abrasion resisting coating with the high gamma-TiAl phase content is finally prepared through the low-temperature supersonic spraying technology.

Description

technical field [0001] The invention relates to a TiAl-based alloy coating and a preparation method thereof, in particular to a wear-resistant coating with high γ-TiAl phase content and a preparation method thereof. Background technique [0002] The density of titanium-aluminum intermetallic compounds is between pure titanium and pure aluminum, and has the general characteristics of intermetallic compounds: for example, there are both metallic bonds and covalent bonds between atoms, the bonding force between atoms is enhanced, and chemical bonds tend to be stable. Therefore, the corrosion resistance and friction resistance of titanium-aluminum intermetallic compounds are higher than those of ordinary titanium alloys. γ-TiAl intermetallic compound, as a new type of lightweight structural material, has become the contemporary aerospace industry, civil use due to its advantages of high specific strength, high specific stiffness, corrosion resistance, wear resistance, high tempe...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/08B22F9/08C22C14/00C22C30/00
CPCC23C4/08B22F9/082C22C14/00C22C30/00
Inventor 王晓明朱胜韩国峰张垚赵阳王启伟任智强常青陈永星周超极徐安阳
Owner ACADEMY OF ARMORED FORCES ENG PLA
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