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A Fe-based self-lubricating composite material suitable for high and low temperatures and its preparation method

A composite material, low-temperature lubrication technology, applied in the field of composite materials, can solve the problems of weak reaction and inability to achieve lubricating effect, and achieve the effect of improving self-lubricating performance, enriching lubricating mechanism, and improving dry friction coefficient and wear rate

Active Publication Date: 2021-04-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the study noticed that although Ti3AlC2 has good lubricating properties, if the Ti3AlC2 cannot be sintered well 3 AlC 2 If it is preserved, the lubricating effect cannot be achieved. When the sintering temperature is 760-1045°C, the reaction between Ti3AlC2 and Fe is weak, and the TiC0.625 phase begins to form, and theoretical analysis shows that Ti 3 AlC 2 The precipitation of Al in the 3 AlC 2 The main factor that reacts with Fe well below its decomposition temperature

Method used

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  • A Fe-based self-lubricating composite material suitable for high and low temperatures and its preparation method
  • A Fe-based self-lubricating composite material suitable for high and low temperatures and its preparation method
  • A Fe-based self-lubricating composite material suitable for high and low temperatures and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] By volume percentage TiC0.4 is 5vol.%, Ti3SiC2 is 10vol.%, Cu is 3vol.%, Ni is 0.8vol.%, Cr is 0.6vol.%, round carbon onion is 0.1vol.%, and the rest is Fe powder, Ni with a particle size of 10 μm, Cu powder with a particle size of 30 μm, and Fe powder with a particle size of 30 μm are uniformly ball-mixed with a planetary ball mill in an argon atmosphere, alcohol is added as a dispersant, and cemented carbide balls are used for grinding balls , ball-to-material ratio 6:1, speed 350r / min, ball milling time 50min; then add TiC0.4 powder with a particle size of 20μm, 200 mesh Ti3SiC2 particles, 10nm round carbon onions, and ball mill at the same speed for 1h to obtain a mixed Powder; dry the mixed powder in an argon atmosphere, and put it into a mold with a diameter of 30mm for pre-compression molding, with a pressure of 15MPa and a holding time of 10s; then put it into the furnace for SPS sintering in an argon atmosphere, and sinter The temperature is 1000°C, the heating...

Embodiment 2

[0022] Per volume percentage TiC0.4 is 10vol.%, Ti3SiC2 is 20vol.%, Cu1vol.%, Ni is 1vol.%, Cr is 0.8vol.%, and round carbon onion is 3vol.%. The rest is Fe powder, and the particle size is Ni of 10 μm, Cu powder with a particle size of 30 μm and Fe powder with a particle size of 30 μm are uniformly ball-mixed in an argon atmosphere using a planetary ball mill, alcohol is added as a dispersant, and cemented carbide balls are used for grinding balls. 6:1, rotation speed 200r / min, ball milling time 50min; then add TiC0.4 powder with a particle size of 45μm, 140 mesh Ti3SiC2 particles, 10nm round carbon onion, and then ball mill at the same speed for 1h to obtain a mixed powder; mix the powder Dry it in an argon atmosphere, put it into a mold with a diameter of 30mm for pre-compression molding, press 30MPa, hold the pressure for 10s, and then put it into the furnace for SPS sintering in an argon atmosphere, and the sintering temperature is 1000°C. The heating rate is 60°C / min, th...

Embodiment 3

[0024]By volume percentage TiC0.4 is 15vol.%, Ti3SiC2 is 25vol.%, Cu is 3vol.%, Ni is 1vol.%, Cr is 0.8vol.%, and round carbon onion is 5vol.%. The rest is Fe powder. Ni with a particle size of 10 μm, Cu powder with a particle size of 10 μm, and Fe powder with a particle size of 10 μm were uniformly ball-mixed in an argon atmosphere using a planetary ball mill, and alcohol was added as a dispersant. The grinding balls were cemented carbide balls. The material ratio is 6:1, the rotating speed is 350r / min, and the ball milling time is 0.7h; then add TiC0.4 powder with a particle size of 20μm, 180 mesh Ti3SiC2 particles, and 10nm round carbon onions, and then ball mill at the same rotating speed for 1h to obtain a mixed powder; Dry the mixed powder in an argon atmosphere, and put it into a mold with a diameter of 30mm for pre-compression molding, the pressure is 20MPa, and the holding time is 30s, and then it is put into the furnace for SPS sintering in an argon atmosphere, and th...

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Abstract

The invention provides a Fe based self-lubricating composite material suitable for high temperature and low temperature and a preparation method thereof. The composite material comprises the following chemical components in percentage by volume: 5-20 vol.% of TiCx (x is not smaller than 0.4 and not bigger than 1.1), 10-35 vol.% of Ti3SiC2, 1-7 vol.% of Cu, 0.1-3 vol.% of Ni, 0.1-3 vol.% of Cr, 0.1-7.5 vol.% of onion carbon, and the balance of Fe powder. The preparation method of the composite material is mainly to perform mixing, pre-pressing drying and discharge plasma sintering on the TiCxpowder, the Ti3SiC2 particles, the onion carbons and the Fe base alloy powder to prepare the Fe based self-lubricating composite material suitable for high temperature and low temperature. The preparation method is simple in operation, short in preparation period and suitable for batch production of such anti-friction materials as self-lubricating bearings under bad working conditions.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an Fe-based self-lubricating composite material suitable for high and low temperatures and a preparation method thereof. Background technique [0002] With the continuous research and development of Fe alloys, the performance continues to improve. At present, aerospace bearings, aerospace landing gear and other rotational friction fields are also trying to apply Fe-based self-lubricating composite materials. After many previous studies, Manmen Liu et al. used Ti3AlC2 instead of graphite and used Ag / Ti3AlC2 to replace Ag / graphite. Due to the partial decomposition of Ti3AlC2, Ag(Al) solid solution was formed in the interface region, which greatly enhanced the mechanical properties of Ag / Ti3AlC2 composites. Performance, improved friction performance and strength. [0003] Ti 3 AlC 2 With good lubricating properties, Huang Zhenying et al. found that the friction perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/42C22C33/02B22F3/105
CPCB22F3/105B22F2003/1051B22F2998/10C22C33/0228C22C33/0292C22C38/42B22F2009/043B22F3/02B22F2003/247
Inventor 李艳国邹芹袁东方王明智关勇成照楠赵玉成陈伟东党赏
Owner YANSHAN UNIV