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CuNiSn alloy-based self-lubricating composite material used at room temperature to 500 DEG C and preparation method thereof

A composite material and room temperature technology, which is applied in the field of metal-based high-temperature self-lubricating composite materials and their preparation, can solve the problems of strength, oxidation resistance and wear resistance, and restricted high-temperature resistance, and achieve smooth friction-temperature characteristics, Effects of wear-resistant self-lubricating properties and self-lubricating friction-temperature characteristics

Inactive Publication Date: 2017-11-21
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high temperature resistance of the copper alloy matrix, especially when the material is used above 300 °C, its strength, oxidation resistance and wear resistance are significantly reduced, which greatly restricts the use of this type of material under the above working conditions

Method used

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  • CuNiSn alloy-based self-lubricating composite material used at room temperature to 500 DEG C and preparation method thereof
  • CuNiSn alloy-based self-lubricating composite material used at room temperature to 500 DEG C and preparation method thereof
  • CuNiSn alloy-based self-lubricating composite material used at room temperature to 500 DEG C and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0013] Weigh the materials according to the ratio of No. 1 in Table 5, put them into a double-cone mixer and mix them evenly, and the mixing time is 8 to 10 hours. Weigh the mixture as required and put it into a steel mold, place the steel mold with the mixture on a 60-ton hydraulic press, press it under a pressure of 300 MPa, and demould after holding the pressure for 3 minutes, and then form a cold-pressed product blank. Place the cold-pressed product blank in a box-type free sintering furnace, raise the temperature at 3-5°C / min in a hydrogen protective atmosphere, and raise the temperature to 890°C for 70 minutes. After the heat preservation is over, freely cool to room temperature and take it out. Then the product blank is subjected to amplitude modulation treatment, that is, it is placed in a box-type free sintering furnace, and in a hydrogen protective atmosphere, the temperature is raised at 3-5°C / min, and the temperature rises to 350°C, and the temperature is kept for ...

Embodiment 2

[0020] Weigh the materials according to the ratio of No. 2 in Table 5, and mix them in a double-cone mixer for 8 to 10 hours. Weigh the mixture as required and put it into a steel mold, place the steel mold with the mixture on a 60-ton hydraulic press, press it under a pressure of 350 MPa, and demould after holding the pressure for 3 minutes to form a cold-pressed product blank. Place the cold-pressed product blank in a box-type free sintering furnace, raise the temperature at a rate of 3-5°C / min in a hydrogen protective atmosphere, and raise the temperature to 950°C for 90 minutes. After the heat preservation is over, freely cool to room temperature and take it out. Then the product blank is subjected to amplitude modulation treatment, that is, it is placed in a box-type free sintering furnace, and in a hydrogen protective atmosphere, the temperature is raised at 3-5°C / min, and the temperature is raised to 400°C, and the temperature is kept for 240 minutes. After the heat pr...

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Abstract

The invention discloses a CuNiSn alloy-based self-lubricating composite material used at the room temperature to 500 DEG C and a preparation method thereof. The material is composed of, by mass, 1-12% of Ni, 3-6% of Sn, 0.5-3% of Fe, 0.01-0.08% of Al, 0.01-0.08% of Ti, 1.0-4.0% of graphite, 1.0-6.0% of PbO, 0.1-1.0% of CeF3 and the balance Cu. The material has high-hardness, high-strength, low-friction, abrasion-resistant and self-lubricating characteristics at the room temperature to 500 DEG C and is suitable for manufacturing sliding bearings, sliding plates, rolling bearing holding frames or other parts for equipment within the temperature range.

Description

technical field [0001] The invention relates to a metal-based high-temperature self-lubricating composite material and a preparation method thereof. The material has high hardness, high strength, low friction, wear resistance, self-lubrication and stable friction-temperature characteristics at room temperature to 500°C. Background technique [0002] Copper alloy-based self-lubricating composites are widely used in machinery manufacturing. However, due to the high temperature resistance of the copper alloy matrix, especially when this type of material is used above 300 °C, its strength, oxidation resistance and wear resistance are significantly reduced, which greatly restricts the use of this type of material under the above working conditions. Such as Japanese patent: High-strength self-lubricating composite material for high temperature and its manufacturing method (Takuhiko Nishida, Shoichi Sekiguchi, Toru Ono, etc., ZL Patent No. 95193289.6 Authorized Announcement Date ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C9/02C22C9/00C22C32/00C22C1/05C22C1/10
CPCC22C1/05C22C9/00C22C9/02C22C9/06C22C32/0021
Inventor 王静波陆龙李珍马文林郭鸿儒王江文
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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