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Self-lubricating composite material containing multi-component lubricating phase tial base and preparation method thereof

A composite material and lubricating phase technology, applied in the field of TiAl-based self-lubricating composite materials containing multiple lubricating phases and their preparation, can solve problems such as lubricant failure, and achieve the effects of reducing friction coefficient, reducing wear rate and enhancing mechanical properties

Active Publication Date: 2019-08-27
JIANGSU FENGTAI TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after a wide range of temperature changes, general lubricants are prone to failure, so it is imperative to prepare a TiAl-based self-lubricating composite that can produce self-lubricating effects in a wide range of temperature changes

Method used

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  • Self-lubricating composite material containing multi-component lubricating phase tial base and preparation method thereof
  • Self-lubricating composite material containing multi-component lubricating phase tial base and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] By TiC 0.4 15wt.%, Ti 3 SiC 2 and OLC(Ti 3 SiC 2 and OLC mass ratio is 3:1) is 10wt.%, Cr is 1wt.%, the rest is the ratio of Ti powder and Al powder (Ti and Al molar ratio is 1:0.9), the TiC 0.4 Powder, Cr powder, Ti powder and Al powder are uniformly mixed in a planetary ball mill in an argon atmosphere, adding absolute alcohol as a dispersant, and the grinding balls are WC carbide balls, the ball-to-material ratio is 6:1, and the speed 250r / min, mixing time 2.5h; then add Ti 3 SiC 2 (80 mesh) and OLC granules, and then mixed at the same speed for 0.5h to obtain a mixed powder;

[0023] Dry the mixed powder in an argon atmosphere, and put it into a graphite mold for pre-compression molding, the pressure is 15MPa, and the holding time is 18s; then it is put into the furnace for SPS sintering in an argon atmosphere, and the sintering temperature is 1100°C. The heating rate is 70°C / min, the sintering pressure is 30MPa, the vacuum degree is 30Pa, and the temperature...

Embodiment 2

[0027] By TiC 0.6 15wt.%, Ti 3 SiC 2 and OLC(Ti 3 SiC 2 and OLC mass ratio is 3:1) is 20wt.%, Cr is 2wt.%, the rest is the ratio of Ti powder and Al powder (Ti and Al molar ratio is 1:0.85), the TiC 0.6 Powder, Cr powder, Ti powder and Al powder were uniformly ball-mixed in a planetary ball mill in an argon atmosphere, adding absolute alcohol as a dispersant, and the grinding balls were made of hard alloy balls, the ball-to-material ratio was 6:1, and the speed 200r / min, mixing time 2h; then add Ti 3 SiC 2(120 mesh) and OLC granules, and then mixed at the same speed for 0.5h to obtain a mixed powder;

[0028] Dry the mixed powder in an argon atmosphere, and put it into a graphite mold for pre-compression molding, the pressure is 20MPa, and the holding time is 10s; then it is put into the furnace in an argon atmosphere for SPS sintering, and the sintering temperature is 1100°C. The heating rate is 70°C / min, the sintering pressure is 40MPa, the vacuum degree is 30Pa, and ...

Embodiment 3

[0032] By TiC 0.4 30wt.%, Ti 3 SiC 2 and OLC(Ti 3 SiC 2 and OLC mass ratio is 3:1) is 10wt.%, Cr is 1wt.%, the rest is the ratio of Ti powder and Al powder (Ti and Al molar ratio is 1:0.95), the TiC 0.4 Powder, Cr powder, Ti powder and Al powder were uniformly ball-mixed in a planetary ball mill in an argon atmosphere, adding absolute alcohol as a dispersant, and the grinding balls were made of hard alloy balls, the ball-to-material ratio was 6:1, and the speed 200r / min, mixing time 2.5h; then add Ti 3 SiC 2 (130 mesh) and OLC granules, and then mixed at the same speed for 0.5h to obtain a mixed powder;

[0033] Dry the mixed powder in an argon atmosphere, and put it into a graphite mold for pre-compression molding, the pressure is 15MPa, and the holding time is 20s; then it is put into the furnace for SPS sintering in an argon atmosphere, and the sintering temperature is 1100°C. The heating rate is 90°C / min, the sintering pressure is 30MPa, the vacuum degree is 20Pa, a...

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Abstract

A multi-lubricating phase-contained TiAl-based self-lubricating composite material and a preparation method thereof belong to the technical field of composite materials. The multi-lubricating phase-contained TiAl-based self-lubricating composite material is composed of chemical components including, by weight percentage, 10-30% of TiCx, 10-30% of Ti3SiC2 and OLC (onion-like carbon) mixture, 1-5% of Cr and Ti powder and AL powder as balance, wherein x of the TiCx is not smaller than 0.4 and not greater than 1.1. The preparation method of the multi-lubricating phase-contained TiAl-based self-lubricating composite material comprises ball-mixing the chemical components above to obtain a mixed powder, drying and prepressing the mixed powder, and then performing sintering and polishing processes. The prepared multi-lubricating phase-contained TiAl-based self-lubricating composite material is relatively low in high-and-low-temperature friction coefficient and wear rate, high in bearing capacity and strength and the like, thereby being applicable to batch production of materials such as self-lubricating bearings.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a TiAl-based self-lubricating composite material containing multiple lubricating phases and a preparation method thereof. Background technique [0002] With the rapid development of the machinery industry, TiAl alloys are widely used in many fields, but the high friction coefficient and wear amount of TiAl alloys limit its wide application. In order to improve the friction and wear properties of TiAl alloys, Zhang Qiaoxin et al. invented a TiAl-graphene-Ti 3 SiC 2 Self-lubricating composite material, the prepared composite material has high purity, fine grain, high density, and has excellent mechanical properties and tribological properties [Zhang Qiaoxin, Xu Zengshi, Shi Xiaoliang, etc. A kind of TiAl-graphene-Ti 3 SiC 2 Self-lubricating composite material and its preparation method [P]. Hubei: CN103882257A, 2014]; Shi Xiaoliang and others invented a 3 SiC 2 、Ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/05C22C26/00C22C32/00C22C29/00
Inventor 邹芹李艳国关勇成照楠党赏罗文奇袁东方
Owner JIANGSU FENGTAI TOOLS