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Repairing method for bearing bush

A repairing method and a technology of bearing bushes, which are applied in the coating process and coating of metal materials, can solve the problems of high repairing cost, shedding, and low bonding strength between the repairing agent layer and the substrate, so as to ensure normal use, prolong service life, The effect of high bonding strength

Inactive Publication Date: 2019-01-01
成都青石激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the above-mentioned laser cladding repair of the existing bearing bush requires spraying a repair agent layer, the repair cost is high, and the bonding strength of the repair agent layer and the substrate is low and easy to fall off as a whole. The present invention provides a repair method for the bearing bush

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for repairing a bearing bush, comprising the following steps:

[0024] (1) Detect the damaged part of the bearing bush;

[0025] (2) Clean the bearing bush to remove the oxide film and oil stain on the surface of the bearing bush;

[0026] (3) Using the coaxial carrier gas powder feeding process, the babbitt alloy powder with a particle size of 53-150 μm is sent to the damaged part for laser cladding to form the first cladding layer with a thickness of 1.6 mm. The process parameters are: laser The power is 1.8KW, the spot diameter is 2mm, the scanning speed is 6mm / s, the powder feeding volume is 4.2g / min, the protective gas is argon, and the gas flow rate is 12L / min;

[0027] (4) Perform laser remelting on the area of ​​the first cladding layer. Laser remelting uses argon as the protective gas. The process parameters are: laser power 0.6KW, scanning speed 10mm / s, and protective gas flow rate 20L / min;

[0028] (5) Laser cladding is performed on the first cladd...

Embodiment 2

[0031] A method for repairing a bearing bush, comprising the following steps:

[0032] (1) Detect the damaged part of the bearing bush;

[0033] (2) Clean the bearing bush to remove the oxide film and oil stain on the surface of the bearing bush;

[0034] (3) The coaxial carrier gas powder feeding process is used to send Babbitt alloy powder with a particle size of 53-150 μm at the damaged part for laser cladding to form the first cladding layer with a thickness of 1.5 mm. The process parameters are: laser The power is 2.5KW, the spot diameter is 3mm, the scanning speed is 8mm / s, the powder feeding volume is 4.5g / min, the protective gas is argon, and the gas flow rate is 24L / min;

[0035] (4) Perform laser remelting on the area of ​​the first cladding layer. Laser remelting uses argon as the protective gas. The process parameters are: laser power 1.0KW, scanning speed 25mm / s, and protective gas flow rate 28L / min;

[0036] (5) Laser cladding is performed on the first cladding...

Embodiment 3

[0039] A method for repairing a bearing bush, comprising the following steps:

[0040] (1) Detect the damaged part of the bearing bush;

[0041] (2) Clean the bearing bush to remove the oxide film and oil stain on the surface of the bearing bush;

[0042] (3) The coaxial carrier gas powder feeding process is used to feed Babbitt alloy powder with a particle size of 53-150 μm at the damaged part for laser cladding to form the first cladding layer with a thickness of 1.8 mm. The process parameters are: laser The power is 1.2KW, the spot diameter is 2mm, the scanning speed is 4mm / s, the powder feeding volume is 3.9g / min, the protective gas is argon, and the gas flow rate is 8L / min;

[0043] (4) Perform laser remelting on the area of ​​the first cladding layer. Laser remelting uses argon as the protective gas. The process parameters are: laser power 0.3KW, scanning speed 5mm / s, and protective gas flow rate 12L / min;

[0044] (5) Laser cladding is performed on the first cladding l...

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Abstract

The invention discloses a repairing method for a bearing bush. The method comprises the following steps: (1) detecting a damaged part of the bearing bush; (2) washing the bearing bush, and removing anoxidation film and oil stain on the surface of the bearing bush; (3) using a coaxial carrier gas powder sending technology, sending Babbitt metal powder to the damaged part and performing laser cladding, and forming a first cladding layer; (4) performing laser remelting on the first cladding layer area; (5) performing the laser cladding on the remelted first cladding layer, and forming a second cladding layer; and (6) checking and mechanically processing. The method is capable of, through performing the laser remelting on the first cladding layer area formed by the laser cladding, performingsecondary laser cladding, and forming the second cladding layer simultaneously and metallurgically bonded with the first cladding layer and an original Babbitt metal layer. In a using process, even ifthe first cladding layer is separated from a matrix, an overall falling-off phenomenon does not occur, the normal use of the bearing bush can be still ensured, service life is prolonged, a repairingagent layer does not need to be sprayed, and cost is saved.

Description

technical field [0001] The invention belongs to the technical field of bearing pads, and in particular relates to a repair method for bearing pads. Background technique [0002] The bearing pad is the contact part between the sliding bearing and the journal. The shape is a tile-like semi-cylindrical surface, which is very smooth. Generally, the base is made of wear-resistant materials such as bronze and anti-friction alloy, and the base is poured with a good anti-friction effect. Made of Alloy. During the actual working process of the bearing pad, the babbitt alloy of the bearing pad is prone to wear, scratches, cracks, delamination or burning, etc., causing the unit to fail to operate normally. The huge waste of resources and energy will also cause environmental pollution. Therefore, if the bearing bush can be repaired, the service life of the bearing bush can be extended, cost can be saved, and significant economic benefits can be brought. [0003] Laser cladding technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 何浩周超阳义
Owner 成都青石激光科技有限公司
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