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A kind of preparation method of copper alloy bearing material and copper alloy bearing material

A technology of copper alloy and bearing bush, which is applied in the field of copper alloy bearing bush material preparation method of copper alloy bearing bush material. Simple, Cohesive Effects

Active Publication Date: 2022-06-21
JIHUA LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bearing bush prepared by the centrifugal casting method has high bonding strength between the alloy and the matrix and high alloy density, but the alloy composition is prone to segregation, which affects the performance of the alloy, high energy consumption and low production efficiency; powder metallurgy method is currently widely used Bearing material preparation process, but due to the process defects of the powder metallurgy method, the prepared workpiece alloy has low density and low bonding strength, and the alloy is prone to fatigue and fall off during the use of high-power engines

Method used

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  • A kind of preparation method of copper alloy bearing material and copper alloy bearing material

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preparation example Construction

[0025] see figure 1 , is a flow chart of steps of a method for preparing a copper alloy bearing material provided by the present invention, comprising the following steps:

[0026] Step S110 : providing a sprayed substrate, and performing sandblasting on the sprayed substrate.

[0027] Specifically, a low-carbon steel with a thickness of more than 1.0 mm is selected as the spraying substrate, and the steel substrate is sandblasted with alumina particles to remove oxide scale, oil stains, etc. on the surface of the steel; the average particle size of the alumina used is 100 ~300μm, blasting pressure is 0.5-1.2MPa.

[0028] Step S120 : using cold air power spraying equipment, spraying and depositing copper alloy powder onto the surface of the sprayed substrate to form a copper alloy coating.

[0029] Specifically, the copper alloy powder includes Sn, Ni, Si, P and Cu, and the mass ratio of the Sn, Ni, Si and P is (0.5-10.0Wt%):(0.05-10.0Wt%):(0.02 ~1.0Wt%): (0.02~1.0Wt%), the...

Embodiment 1

[0040] (1) Select low carbon steel with a thickness of 5.00mm as the spraying substrate. Before spraying, use alumina particles to blast the steel substrate to remove oxide scale and oil stains on the surface of the steel; the average particle size of the alumina used is 300μm, the blasting pressure is 0.8MPa.

[0041] (2) Using cold air power spraying equipment, the copper alloy powder is sprayed and deposited on the surface of the steel to form a copper alloy coating; the composition of the copper alloy powder is Sn: 1.95Wt%, Ni: 8.10Wt%, Si: 0.04Wt%, P: 0.02Wt%, impurity content≤0.5%, Cu balance, powder is gas atomized spherical powder, powder particle size is 44~53μm, spraying gas is nitrogen, spraying gas pressure is 4.0MPa, gas temperature is 500℃, spraying distance is 30mm, the spray gun nozzle is 90° to the steel substrate, and the spray thickness is 1.50mm.

[0042] (3) The sprayed surface is ground and polished, and heat treated in a hydrogen-nitrogen mixed protecti...

Embodiment 2

[0044](1) Select low carbon steel with a thickness of 12.00mm as the spraying substrate. Before spraying, use alumina particles to blast the steel substrate to remove oxide scale and oil stains on the surface of the steel; the average particle size of the alumina used is 300μm, the blasting pressure is 0.8MPa.

[0045] (2) Using cold air power spraying equipment, the copper alloy powder is sprayed and deposited on the steel surface to form a copper alloy coating; the composition of the copper alloy powder is Sn: 0.85Wt%, Ni: 2.30Wt%, Si: 0.20Wt%, P: 0.03Wt%, impurity content≤0.5%, Cu balance, powder is gas atomized spherical powder, powder particle size is 44~53μm, spraying gas is nitrogen, spraying gas pressure is 4.0MPa, gas temperature is 600℃, spraying distance is 30mm, the spray gun nozzle is 90° to the steel substrate, and the spray thickness is 2.20mm.

[0046] (3) The sprayed surface is ground and polished, and heat treated in a hydrogen-nitrogen mixed protective atmo...

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Abstract

The preparation method of the copper alloy bearing material provided by the present invention provides a spray-coated substrate, and performs sandblasting on the spray-coated substrate, and adopts cold air power spraying equipment to deposit copper alloy powder onto the surface of the spray-coated substrate to form a copper alloy Coating, grinding and polishing the surface of the copper alloy coating, and performing heat treatment at a temperature of 400-1000°C under a protective atmosphere, and leveling treatment, to obtain the copper alloy bearing material, the copper alloy provided by the invention The preparation method of the bearing material adopts the cold spraying process to prepare the bearing material. The density of the copper alloy coating prepared by the cold spraying can reach more than 99.0%.

Description

technical field [0001] The invention relates to the technical field of surface protection, in particular to a preparation method of a copper alloy bearing material and a copper alloy bearing material. Background technique [0002] At present, most of the bearing materials used in high-power and high-speed engines are copper-lead alloy sliding bearing materials, and the lead content is generally 10-30%. Whether it is processing or use, there is a problem of environmental pollution. Therefore, lead-free bearing is an inevitable trend. [0003] The bearing bush is the part of the sliding bearing in contact with the shaft, and is generally made of wear-resistant materials such as babbitt, bronze, and anti-friction alloys. At present, the lead content of the main engine copper-based bearing materials is generally 10-30%. The reason why the lead content is so high is that the softness of lead makes the bearing have good wear reduction, embedding and compliance; but with environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24C1/08C23C4/06C23C4/12F16C33/12F16C33/14
CPCB24C1/08F16C33/12F16C33/14C23C4/12C23C4/06
Inventor 李挺卢静解路汤烈明
Owner JIHUA LAB