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Copper-based powder metallurgy friction material with high-stability friction coefficient and preparation method

A technology of powder metallurgy and friction coefficient, which is applied in the direction of friction linings, metal processing equipment, mechanical equipment, etc., can solve the problems that it is impossible to explain whether the copper-based material meets the technical requirements of the product, and the copper-based material has not been tested and verified, and the amount of deformation can be achieved. Small size, good wear resistance, and low expansion

Pending Publication Date: 2022-03-22
XIAN AVIATION BRAKE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the inventions with publication numbers CN109988937A and CN109513939A, only a preparation process of copper-based powder metallurgy material is proposed, and no test verification is carried out on the prepared copper-based material, so it is impossible to explain whether the prepared copper-based material meets the technical requirements of the product

Method used

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  • Copper-based powder metallurgy friction material with high-stability friction coefficient and preparation method
  • Copper-based powder metallurgy friction material with high-stability friction coefficient and preparation method
  • Copper-based powder metallurgy friction material with high-stability friction coefficient and preparation method

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Embodiment Construction

[0046] The invention is a copper-based powder metallurgy friction material with high stable friction coefficient, which is composed of 48-52% electrolytic copper powder, 18-24% reduced iron powder, 12-16% graphite, 3-6% ferrochrome alloy and aluminum oxide 2-4%, molybdenum powder 2-4%, precipitated barium sulfate 2-5% and polyvinyl alcohol powder 3-6%, and the stated percentages are mass percentages.

[0047] The present invention specifically illustrates its technical scheme through 4 embodiments. The components of each embodiment are shown in Table 1:

[0048] The components of each implementation example proposed by the present invention are shown in Table 1, wherein the content of each component is in mass percent (%).

[0049] Table 1

[0050]

[0051] The content of Cu in the electrolytic copper powder is ≥99.8%, and the implementation standard is GB / T5246-2007.

[0052] The content of Fe in the reduced iron powder is more than or equal to 98.5%, and the implementa...

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Abstract

According to the copper-based powder metallurgy friction material with the high stable friction coefficient and the preparation method, the components and the preparation process of the material are optimized, the system matching effect of a copper alloy matrix, a lubricating component and a solid component is exerted, and the obtained copper-based powder metallurgy friction material has the advantages of being high in strength, low in expansion rate, small in deformation amount and good in abrasion resistance; the fluctuation range of the friction coefficient of the friction material does not exceed + / -5%, the average friction coefficient mu cp is larger than or equal to 0.31 and smaller than or equal to 0.34, the fluctuation range of the friction coefficient does not exceed + / -5% of the average friction coefficient, and the linear abrasion loss of the friction material is smaller than or equal to 0.0038 mm / face per time. The obtained friction material has good mechanical strength, is suitable for the working conditions that the positive pressure is 2.032 KN and the speed is 75 m / s, has the advantages of being high in strength, low in expansion rate, small in deformation amount, good in abrasion resistance and the like, does not have the phenomena of friction layer falling, chipping, clamping stagnation, bonding and the like in the using process, and is stable in braking curve and stable and reliable in braking process.

Description

technical field [0001] The invention relates to the field of powder metallurgy copper-based brake materials, in particular to a copper-based powder metallurgy friction material with high and stable friction coefficient and a preparation method thereof. Background technique [0002] Among powder metallurgy friction materials, copper-based friction materials are widely used in the fields of machining, transportation, aviation and navigation because of their excellent product characteristics. However, the existing copper-based friction materials still have problems such as low hardness and high wear rate, especially in the high-speed braking process, the fluctuation range of the friction coefficient exceeds ±10%, resulting in unstable braking distance, resulting in relatively high High risk factor. Therefore, it is of great significance to prepare copper-based powder metallurgy friction materials with moderate friction coefficient and stable braking. [0003] In the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/10B22F1/145B22F9/04B22F3/14B22F7/08F16D69/02
CPCB22F9/04B22F3/14B22F7/08F16D69/027B22F2009/043
Inventor 刘联军徐保海李利
Owner XIAN AVIATION BRAKE TECH
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