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A copper-based powder metallurgy self-lubricating wear-resistant material and its preparation process

A technology for powder metallurgy and wear-resistant materials, which is applied in the field of powder metallurgy material preparation to meet the requirements of service life and reliability

Active Publication Date: 2016-02-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a kind of component distribution ratio is reasonable, in order to solve the service life and reliability of the wear-resistant components of the helicopter transmission system, to provide a powder metallurgy self-lubricating wear-resistant component for the helicopter transmission system. Grinding material and its preparation process, so that the material meets the service life and reliability requirements

Method used

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  • A copper-based powder metallurgy self-lubricating wear-resistant material and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The components of powder metallurgy self-lubricating wear-resistant materials are: 0.5 nickel, 0.5 graphite, 0.5 molybdenum disulfide, and 98.5 copper. The above component parameters are mass percentage data.

[0023] The manufacturing process is as follows: the components are mixed uniformly according to the above ratio and then mixed with aviation kerosene 1ml / kg; the mixture is poured into the cavity of the compression mold, and the powder compact is formed under the pressing pressure of 200-300MPa; the thickness is 2mm The 45# steel plate is processed into a steel back, plated with copper, and the thickness of the coating is 10-20μm; the pressure sintering process of the green compact is as follows: heating time is 2 hours, the initial stage pressure of heating is 0-0.1MPa, after 500℃ pressurize to 0.2MPa, continue The temperature is increased to 840°C; the holding temperature is 840°C, the holding pressure is 0.2MPa, the holding time is 2 hours, and hydrogen protection...

Embodiment 2

[0027] The components of the powder metallurgy self-lubricating wear-resistant material are: 2 nickel, 2 graphite, 1.5 molybdenum disulfide, 94.5 copper, and the above component parameters are mass percentage data.

[0028] The manufacturing process is as follows: the components are mixed uniformly according to the above ratio and then mixed with aviation kerosene 1ml / kg; the mixture is poured into the cavity of the compression mold, and the powder compact is formed under the pressing pressure of 200-300MPa; the thickness is 2mm The 45# steel plate is processed into a steel back, plated with copper, and the thickness of the coating is 10-20μm; the pressure sintering process of the compact is as follows: heating time is 2 hours, the initial stage pressure of heating is 0-0.1MPa, after 500℃ pressurize to 0.25MPa, continue The temperature is increased to 840°C; the holding temperature is 840°C, the holding pressure is 0.25MPa, the holding time is 2.5 hours, and hydrogen protection is...

Embodiment 3

[0032] The self-lubricating wear-resistant material components are: 4 nickel, 4 graphite, 3 molybdenum disulfide, 89 copper, and the above component parameters are mass percentage data.

[0033] The manufacturing process is as follows: the components are mixed uniformly according to the above ratio and then mixed with aviation kerosene 1ml / kg; the mixture is poured into the cavity of the compression mold, and the powder compact is formed under the pressing pressure of 200-300MPa; the thickness is 2mm The No. 45 steel plate is processed into a steel back, plated with copper, and the thickness of the coating is 10-20μm; the pressure sintering process of the green compact is as follows: heating time is 3 hours, the initial stage pressure of heating is 0-0.1MPa, after 500℃ pressurize to 0.28MPa, continue The temperature is increased to 840°C; the holding temperature is 840°C, the holding pressure is 0.28MPa, the holding time is 3 hours, and hydrogen protection is introduced during the...

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Abstract

The invention discloses a copper-based powder metallurgy self-lubricating wear-resistant material for a helicopter transmission system. copper. The present invention also provides a process for preparing the material, which is characterized in that it comprises the following steps: weighing various powders according to the following mass percentages: 0.5-4 nickel, 0.5-4 graphite, 0.5-3 molybdenum disulfide, the balance It is copper; after mixing evenly, add aviation kerosene and mix evenly; the mixture is pressed to form a compact; the compact is fixed on the supporting steel back, and the copper-based powder metallurgy self-lubricating wear-resistant material is obtained by pressure sintering. The service life and reliability of the self-lubricating and wear-resistant material prepared by applying the invention meet the use requirements of the helicopter transmission system. Suitable for industrial production.

Description

Technical field [0001] The invention discloses a copper-based powder metallurgy self-lubricating wear-resistant material and a preparation process thereof, in particular to a copper-based powder metallurgy self-lubricating wear-resistant material suitable for a helicopter transmission system and a preparation process thereof. It belongs to the technical field of powder metallurgy material preparation. technical background [0002] The transmission system is one of the key moving parts of the helicopter, and its performance directly reflects the overall performance and reliability of the helicopter. Among them, the wear-resistant parts play the role of separating and sliding support of two parts with different speeds and different materials. Large torsional force, which usually works under oil lubrication. When the lubrication system fails or fails, the entire transmission system is in dry running state. At this time, the wear-resistant components are required to have a certain dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C32/00B22F1/00B22F3/16
Inventor 姚萍屏熊拥军
Owner CENT SOUTH UNIV
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