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Bilayer structure TC4-base titanium alloy self-lubricating material and preparation method thereof

A technology of self-lubricating materials and double-layer structure, which is applied in the direction of additive manufacturing, process efficiency improvement, and energy efficiency improvement. Uniformity of organizational structure and other issues, to achieve the effect of easy control of process parameters, saving dosage, stable and excellent tribological properties

Active Publication Date: 2018-06-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, these preparation methods have a large heat gradient distribution, which affects the uniformity of the material structure; on the other hand, special molds are required when the material is formed, and there are problems such as complex forming process and poor machining performance.
In addition, the composition and thickness of the uniformly formed friction layer is uncontrollable, and it needs to be formed after a certain period of time under specific friction conditions and friction and wear. Under individual conditions, the friction layer cannot be formed or the formed friction layer has poor anti-friction and wear resistance

Method used

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  • Bilayer structure TC4-base titanium alloy self-lubricating material and preparation method thereof
  • Bilayer structure TC4-base titanium alloy self-lubricating material and preparation method thereof
  • Bilayer structure TC4-base titanium alloy self-lubricating material and preparation method thereof

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Embodiment 1

[0037] A double-layer structure TC4-based titanium alloy self-lubricating material, including the top layer and the bottom layer structure, both use TC4 titanium alloy as the matrix, and use graphene as the lubricating phase and reinforcing phase, and undergo vibration mixing, high-temperature melting, and vacuum in sequence. TC4-based titanium alloy self-lubricating materials with different additions of graphene on the top and bottom layers were prepared by atomization and laser fusion deposition processes. Among them, the mass ratio of elements Al, V, Fe, C and Ti in TC4 titanium alloy is 6.0:4.0:0.3:0.1:89.6; the thickness of the top layer structure is 1.5mm, and the amount of graphene added is 1.5% of the mass of the base TC4 titanium alloy. wt.%; the thickness of the underlying structure is 6.5mm, and the amount of graphene added is 0.5wt.% of the mass of the matrix TC4 titanium alloy.

[0038] Such as figure 1 As shown, the above-mentioned preparation method of the doub...

Embodiment 2

[0050] A double-layer structure TC4-based titanium alloy self-lubricating material with graphene as the lubricating phase and reinforcing phase, including a top layer and a bottom layer structure, both of which use TC4 titanium alloy as the matrix, and graphene as the lubricating phase and reinforcing phase; the top layer And the bottom layer is a TC4-based titanium alloy self-lubricating material containing different amounts of graphene. Among them, the mass ratio of elements Al, V, Fe, C and Ti in the TC4 titanium alloy is 6.0:4.0:0.3:0.1:89.6; the thickness of the top layer structure is 1.25mm, and the amount of graphene added is 2.0wt of the mass of the base TC4 titanium alloy .%; the thickness of the underlying structure is 6.75mm, and the amount of graphene added is 0.75wt.% of the mass of the matrix TC4 titanium alloy.

[0051] Such as figure 1 As shown, the above-mentioned preparation method of the double-layer structure TC4-based titanium alloy self-lubricating mater...

Embodiment 3

[0062]A double-layer structure TC4-based titanium alloy self-lubricating material with graphene as the lubricating phase and reinforcing phase, including a top layer and a bottom layer structure, both of which use TC4 titanium alloy as the matrix, and graphene as the lubricating phase and reinforcing phase; the top layer And the bottom layer is a TC4-based titanium alloy self-lubricating material containing different amounts of graphene. Among them, the mass ratio of the elements Al, V, Fe, C and Ti in the TC4 titanium alloy is 6.0:4.0:0.3:0.1:89.6; the thickness of the top layer structure is 1.0mm, and the amount of graphene added is 2.5% of the mass of the base TC4 titanium alloy. wt.%; the thickness of the underlying structure is 7.0mm, and the added amount of graphene is 1.0wt.% of the mass of the matrix TC4 titanium alloy.

[0063] Such as figure 1 As shown, the above-mentioned preparation method of the double-layer structure TC4-based titanium alloy self-lubricating mat...

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Abstract

The invention relates to a bilayer structure TC4-base titanium alloy self-lubricating material. TC4 titanium alloy is used as a base material, graphene is used as a lubrication phase and a reinforcement phase, and the processes of vibration material mixing, high-temperature melting, vacuum gas atomization and laser melting deposition are sequentially executed to prepare the TC4-base titanium alloyself-lubricating material with the top layer and the bottom layer including different adding amounts of the graphene. According to the self-lubricating material, the graphene is arranged into a TC4 titanium alloy matrix by means of graded distribution in-situ composite, and the friction coefficient and attrition rate of the obtained self-lubricating material in the frictional wearing process arelow. Compared with a self-lubricating material with the lubrication phase and the reinforcement phase being evenly distributed, the properties of antifriction and wearing resistance can be better achieved more rapidly, and the precious lubrication phase and reinforcement phase graphene can be reduced. Moreover, the technological parameters can be controlled easily in the preparation process, and it is of great significance to improving the tribological property of the self-lubricating material and industrialized application of the self-lubricating material.

Description

technical field [0001] The invention relates to a double-layer structure TC4-based titanium alloy self-lubricating material with graphene as a lubricating phase and a reinforcing phase and a preparation method thereof. Background technique [0002] Titanium alloy has the characteristics of high strength and small specific gravity. Under the same connection strength, titanium alloy fasteners are lighter than steel fasteners, so titanium alloy fasteners have a good weight reduction effect. At the same time, titanium alloy has high fatigue strength, low stress concentration sensitivity, and its performance is better than that of steel for similar purposes. The use of titanium alloy fasteners in modern aerospace vehicles continues to increase. However, titanium alloy has low surface hardness, high friction coefficient and poor wear resistance, especially sensitive to adhesive wear and fretting wear. For the parts that need to be disassembled, the fasteners need to be reused man...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F7/02B22F9/08B22F1/00
CPCB22F1/0003B22F7/02B22F9/082B22F10/00B22F10/36B22F10/25B22F10/22Y02P10/25
Inventor 史晓亮周宏胭黄玉春刘锡尧卢冠辰邓骁斌闫昭章桥新
Owner WUHAN UNIV OF TECH
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