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Fe-based high-temperature-resistant self-lubricating composite material and preparation method thereof

A composite material and self-lubricating technology, which is applied in the field of composite materials, can solve problems such as easy falling off and material falling off, and achieve the effects of improving self-lubricating performance, enriching lubrication mechanism, and improving dry friction coefficient and wear rate

Inactive Publication Date: 2018-12-18
YANSHAN UNIV
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Problems solved by technology

[Zheng Yi, Dang Wentao, Ren Shufang. Spark plasma sintering of Ti 3 SiC 2 -Study on tribological properties of metal composites[J].Materials Development and Application, 2016,31(03):86-93.]; Yan Shuping and others studied Ag-based materials in MoS 2 , Added Ti on the basis of graphite 3 SiC 2 As a lubricating phase, it was found that the wear resistance of the material was significantly improved, but Ti 3 SiC 2 It is easy to fall off when rubbed [Yan Shuping, Wei Yaobing, Han Jiesheng, Ma Wenlin, Guo Tieming, Meng Junhu.Ti 3 SiC 2 The addition of Ag-MoS 2 Influence of -graphite composites on mechanics and friction and wear properties[J]. Chinese Journal of Tribology, 2015, 35(05):622-628.]; Feng Shaoliang et al. are studying Ti 3 SiC 2 instead of MoS 2 The addition of Ti was found in the preparation of Fe-based high temperature resistant self-lubricating composites in the lubricating phase 3 SiC 2 The Fe-based material of the lubricating phase produces good lubricating properties at 873-1073K, but it is easy to produce Ti during friction 3 SiC 2 Material Shedding [Feng Shaoliang.Ti 3 SiC 2 Effect on the friction and wear properties of Fe-based sliding bearing materials [D]. Yanshan University, 2017.]; Chen Tingting et al. studied Ti 3 SiC 2 Substituting graphite as a lubricant, it is considered that Ti 3 SiC 2 It can replace graphite as a new type of lubricating material [Chen Tingting, Liu Wenyang, Zhang Jianbo, Yi Zhiyong.Ti 3 SiC 2 Research progress of metal-based self-lubricating materials instead of graphite [J]. Nonferrous Metal Materials and Engineering, 2017, 38(01):56-60], Chen Lulu found that TiCx and Fe can be successfully combined, and improve the yield of the overall material Strength, tensile properties and other mechanical properties [Chen Lulu. TiC x - Preparation of Fe-based composite materials and research on friction properties [D]. Beijing Jiaotong University, 2017]

Method used

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  • Fe-based high-temperature-resistant self-lubricating composite material and preparation method thereof
  • Fe-based high-temperature-resistant self-lubricating composite material and preparation method thereof

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preparation example Construction

[0027] The preparation method of the above-mentioned Fe-based high temperature resistant self-lubricating composite material comprises the following steps:

[0028] Step 1), preparation of mixed powder

[0029] In an argon atmosphere, a planetary ball mill is used to uniformly mix Ni powder, Cu powder, Cr powder, and Fe-based alloy powder. Alcohol is used as a dispersant, and cemented carbide balls are used for grinding balls. The ball-to-material ratio is 4-6:1. The rotation speed is 200-350r / min, and the ball milling time is 0.5-2h; then add TiCx Powder, Ti 3 SiC 2 Particles, and then ball milled at the same speed for 1h;

[0030] Step 2), pre-press molding

[0031] Dry the mixed powder in step 1) in an argon atmosphere, and put it into a graphite mold for pre-compression molding, the pressure is 15-30MPa, the holding time is 10-30s, and the mold diameter is 30mm;

[0032] Step 3), spark plasma sintering process

[0033] The sintering temperature is 900-1300°C, the heat...

Embodiment 1

[0036] TiC by volume percentage 0.4 5vol.%, Ti 3 SiC 2 20vol.%, Cu 2.2vol.%, Ni 0.1vol.%, Cr 0.1vol.%, the rest is Fe powder, Ni with a particle size of 10μm, Fe powder with a particle size of 10μm and Cu powder with a particle size of 10μm 1. The Cr powder with a particle size of 10 μm is uniformly ball-mixed with a planetary ball mill in an argon atmosphere, and alcohol is added as a dispersant. The grinding balls are WC carbide balls, the ball-to-material ratio is 4:1, and the speed is 350r / min. Ball milling time 50min; then add TiC with a particle size of 2μm 0.4 Powder, particle size is 200 mesh Ti 3 SiC 2 The particles were ball milled at the same speed for 1 hour to obtain a mixed powder; the mixed powder was dried in an argon atmosphere, and put into a graphite mold with a diameter of 30 mm for pre-compression molding, with a pressure of 15 MPa and a holding time of 10 s; then Put it into the furnace in an argon atmosphere for discharge plasma sintering, the sinte...

Embodiment 2

[0038] TiC by volume percentage 0.4 10vol.%, Ti 3 SiC 2 is 20vol.%, Cu is 2.2vol.%, Ni is 1vol.%, Cr is 0.8vol.%, and the rest is Fe powder. Ni with a particle size of 20 μm, Fe powder with a particle size of 20 μm and Cu powder with a particle size of 20 μm 1. The Cr powder with a particle size of 10 μm is uniformly ball-mixed with a planetary ball mill in an argon atmosphere, and alcohol is added as a dispersant. The grinding balls are WC carbide balls, the ball-to-material ratio is 4:1, and the speed is 200r / min. Ball milling time 1h; then add TiC with a particle size of 20μm 0.4 Powder, 120-160 mesh Ti 3 SiC 2 The particles were ball milled at the same speed for 1 hour to obtain mixed powder; the mixed powder was dried in an argon atmosphere, and put into a graphite mold with a diameter of 30mm for pre-compression molding, with a pressure of 30MPa and a holding time of 10s. Put it into the furnace for spark plasma sintering in an argon atmosphere, the sintering temper...

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Abstract

The invention discloses a Fe-based high-temperature-resistant self-lubricating composite material. The Fe-based high-temperature-resistant self-lubricating composite material comprises 5-20 vol.% of TiCx (x is greater than or equal to 0.4 and less than or equal to 1.1), 10-40 vol.% of Ti3SiC2, 1-7 vol.% of Cu, 0.1-3 vol.% of Ni, 0.1-3 vol.% of Cr, and the balance Fe power. The preparation method of the composite material mainly comprises the following steps that uniform ball-mixing, pre-pressing and drying and spark plasma sintering are carried out on TiCx powder, Ti3SiC2 and Fe-based alloy powder so as to prepare the Fe-based high-temperature-resistant self-lubricating composite material with Ti3SiC2 and TiCx as lubricating phases. The preparation method is simple to operate and short inpreparation period, and the prepared Fe-based high-temperature-resistant self-lubricating composite material has low friction coefficient and wear rate, and has the high bearing capacity, high strength and the like, and is suitable for batch production of antifriction materials such as self-lubricating bearings under severe working conditions.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an Fe-based high temperature resistant self-lubricating composite material and a preparation method thereof. Background technique [0002] With the continuous research and development of Fe alloys, the performance continues to improve. At present, Fe-based self-lubricating composite materials have begun to emerge in the application fields that Cu-based materials cannot adapt to, such as high-temperature-resistant construction machinery, aerospace landing gear and other rotational friction fields. Zhang Rui et al found that Ti 3 SiC 2 / PbO (15vol.%PbO) exhibited excellent lubricating properties at the temperature of 873-1073K. [Zhang Rui.Ti 3 SiC 2 High-temperature tribological properties of / PbO composites [A]. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Tribology Branch of Chinese Mechanical Engin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C38/42C22C1/05C22C33/02
CPCC22C29/067C22C1/051C22C33/0292C22C38/42
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
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