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Self-lubricating wear-resistant titanium-based composite material part and preparation method thereof

A titanium-based composite material, self-lubricating technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low hardness of titanium and its alloys, occlusal instability of parts, and noise of instruments and equipment, and achieve the time of heat preservation and pressure preservation. The effect of short, fast heating rate and short production cycle

Pending Publication Date: 2022-04-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, titanium and its alloys have low hardness and poor wear resistance, and are easy to wear during the use of parts, which will lead to the instability of the occlusion of the parts, causing the sound or even vibration of the equipment, etc.

Method used

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  • Self-lubricating wear-resistant titanium-based composite material part and preparation method thereof
  • Self-lubricating wear-resistant titanium-based composite material part and preparation method thereof
  • Self-lubricating wear-resistant titanium-based composite material part and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0046] Such as figure 1 As shown, the preparation method of the self-lubricating and wear-resistant titanium matrix composite parts comprises the following steps:

[0047] (1) Weigh the titanium matrix powder, reinforcing phase powder and self-lubricating phase powder in proportion, and perform mechanical mixing to obtain a uniformly mixed composite material powder. Wherein, the mass percentages of the titanium matrix powder, the reinforcing phase powder and the self-lubricating phase powder in the composite material powder are 75.0-95.0%, 1.0-10.0% and 4.0-15.0%, respectively.

[0048] The titanium matrix powder is Ti, TC4, TA15 or TA17 powder, and the particle size is 1-60 μm.

[0049] Reinforcement phase powder is SiC, B 4 C. At least one of the graphite powders is micron-sized powder with a particle size of 1-10 μm.

[0050] As a preferred embodiment, the reinforcing phase powder is SiC and B 4 The combination of C, and the mass percentage of the two is 1:1.

[0051] ...

Embodiment 1

[0060] A self-lubricating and wear-resistant titanium-based composite material, the matrix powder is TC4, the particle size is D 50 =27.0μm, accounting for 86.0wt.%; the reinforcement phase powder is SiC, particle size D 50 =5.0μm, accounting for 7.0wt.%; self-lubricating material is MoS 2 , granularity D 50 =2.6 μm, accounting for 7.0wt%. Firstly, the multi-axis roller mill is used for mechanical mixing, the mixing medium is zirconia balls, the ball milling speed is 100r / min, and the ball milling time is 24h; then the composite material powder obtained by mechanical mixing is placed in a graphite mold and placed in a discharge plasma Sintering was carried out in the furnace, and the sintering parameters were as follows: sintering temperature 1100°C, sintering pressure 40MPa, pressure holding time 10min, heating rate 100°C / min, vacuum degree 20Pa, and self-lubricating and wear-resistant titanium matrix composite parts were obtained.

[0061] Examples 2-9 adopt the same prep...

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Abstract

The invention provides a self-lubricating wear-resistant titanium-based composite material part and a preparation method thereof. The structure of the part comprises a matrix phase, a reinforcing phase and a self-lubricating phase, wherein the reinforcing phase and the self-lubricating phase are dispersed and distributed around the matrix phase; wherein the matrix phase is alpha-Ti, the reinforcing phase is at least one of SiC, B4C and graphite, and the self-lubricating phase is at least one of MoS2, WS2, Ti3SiC2 and h-BN; the friction coefficient of the workpiece ranges from 0.15 to 0.30, and the hardness of the workpiece ranges from 590 HV to 1305 HV. The self-lubricating wear-resistant titanium-based composite material has refined grains, higher density, excellent mechanical properties such as hardness and the like, a friction coefficient far lower than that of a titanium alloy matrix material, smaller wear loss under the same working condition, high wear resistance and outstanding comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of new material design and preparation, in particular to a self-lubricating wear-resistant titanium-based composite material and a preparation method thereof. Background technique [0002] Titanium and its alloys are lightweight and high-strength materials, and their density (4507kg / m 3 ) second only to magnesium alloy (1738kg / m 3 ) and aluminum alloy (2700kg / m 3 ), lower than steel (7874kg / m 3 ), copper alloy (8920kg / m 3 ), tungsten alloy (19250kg / m 3 ) and other materials, the parts of the same size have a smaller mass, and their strength is higher than that of magnesium alloys and aluminum alloys. The hardness and toughness of titanium and its alloys are higher than those of magnesium alloys and aluminum alloys. The thermal expansion coefficient of titanium and its alloys is low, which is much lower than that of steel, copper alloy, aluminum alloy and other materials. The prepared parts have high di...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C14/00C22C32/00B22F3/105B22F9/04B22F1/105
CPCC22C1/05C22C14/00C22C32/00B22F3/105B22F9/04C22C32/0063C22C32/0089C22C32/0057C22C32/0052C22C32/0084C22C32/0068C22C32/0047B22F2003/1051B22F2009/043
Inventor 路新高营张策刘鑫张帅华
Owner UNIV OF SCI & TECH BEIJING