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Electroplating technology for bearing quaternary alloy

A quaternary alloy and electroplating technology, which is applied to bearing components, shafts and bearings, mechanical equipment, etc., can solve problems such as inability to meet performance requirements, and achieve the effects of improving wear resistance, service life and carrying capacity

Active Publication Date: 2010-06-23
四川双飞虹精密部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the engine performance requirements are getting higher and higher, especially for aircraft engines, high-performance cars, and heavy-duty automobile engine bearing bushes, the "lead-tin-copper" ternary alloy coating can no longer meet its higher performance requirements. It requires us to seek better functional coatings for bearing bushes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] A bearing bush quaternary alloy electroplating process, comprising the following steps:

[0079] 1) Ultrasonic degreasing

[0080] Use trichlorethylene or hydrocarbon as the degreasing agent and use an ultrasonic cleaning machine to clean the oil, iron filings and other pollutants on the surface of the bearing bush. The cleaning time is 10-15 minutes, and the temperature of the degreasing agent is 50-60°C;

[0081] 2) Chemical degreasing

[0082] Use FD-211C degreasing powder for chemical degreasing, the concentration is 30-50g / L, the time is 3-5 minutes, and the temperature is 50-70°C; to remove the oil remaining in the pores, the product after degreasing can be Tested by water test method;

[0083] 3) Two-stage cleaning

[0084] Use urban countercurrent rinsing, and change the clean water every shift;

[0085] 4) Electrochemical degreasing

[0086] Use copper-lead powder material FD~318 electrolytic degreasing powder for degreasing, the concentration is 50-70g / L,...

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PUM

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Abstract

The invention relates to a technology for electroplating quaternary alloy at the inner surface of a bearing, comprising the steps of ultrasonic oil removal, chemical oil removal, electrochemical oil removal, electrolysis pickling, pickling, electronickelling of grid, recovery, electroplating of Pb-Sn-Cu alloy, electroplating of indium layer; washing with hot water, drying, heat diffusion treatment, etc., the bearing quaternary alloy formed by four metallic chemical elements including lead, tin, copper and indium has firm bonding with substrate, good fatigue strength, carrying capacity and abrasive resistance, long service life, strong corrosive resistance and surface performance and high added value, and is widely used as a surface treatment technology for the bearing on aircraft engine, high-performance car, ship and heavy-duty vehicle engine.

Description

technical field [0001] The invention relates to a bearing shell electroplating process, in particular to a process for electroplating a quaternary alloy on the inner surface of a bearing shell. Background technique [0002] The bearing bush is an important part in the sliding bearing of the internal combustion engine, and the surface treatment of the bearing bush is an important link in the processing of the bearing bush. At present, automobile engines are developing in the direction of high speed, heavy load, and supercharging. In order to meet the high-performance requirements of the engine, bearing pad manufacturers are increasingly using high-strength, high-performance materials (that is, copper-lead alloy bearing pads) material and low-tin alloy bearing material), in order to give full play to the properties of this type of material and improve the surface properties of this type of material, it is necessary to electroplate a layer of soft coating on the inner surface o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/00F16C33/14
Inventor 何先军盛威威
Owner 四川双飞虹精密部件有限公司
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