Rust-removing and spot-removing method for synchronizer gear ring

A synchronizer gear ring and freckle removal technology, which is applied to the coating process of metal materials, can solve the problems of manufacturers' economic and reputation loss, waste of metal materials, etc., and achieve the effect of small investment and simple operation

Inactive Publication Date: 2014-02-26
长春永新汽车同步器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the synchronizer rings are corroded and spotted, the manufacturer can only return these rings to the furnace for resmelting, which causes great economic losses and waste of metal materials; if rust and spots are found at the customer, the customer often requires Returns, or even claims, for which the manufacturer will suffer double losses of economy and reputation

Method used

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  • Rust-removing and spot-removing method for synchronizer gear ring
  • Rust-removing and spot-removing method for synchronizer gear ring
  • Rust-removing and spot-removing method for synchronizer gear ring

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Effect test

Embodiment 1

[0031] HAl61-4-3-1 is a multi-component complex brass, composed of Cu, Zn, Al, Si, Ni, Co six elements. Chemical composition ratio: Cu60-62%, Al3.5-4.5%, Si0.5-1.5%, Ni2.5-4.0%, Fe0.5-1.3%, Co0.5-1.0Zn balance. Because of its excellent strength, hardness, corrosion resistance and wear resistance, it is widely used in the field of wear-resistant materials and is the preferred material for the synchronizer ring of trucks.

[0032] The derusting and freckle removal process of the synchronizer gear ring is as follows:

[0033] 1) Degreasing; soak with metal cleaning agent and water at room temperature until there are no oil droplets on the surface; the mass percentage of metal cleaning agent is: 80±2%;

[0034] 2) Carry out rust and spot removal treatment on rusted and speckled gear rings with rust and spot removal solution: rust and spot removal solution: CrO 3 50-100g / L, H 2 SO 4 30-50ml / L, brightener 1-3g / L, metal active agent 1-3g / L; the time of rust and spot removal depen...

Embodiment 2

[0042] HMn62-3-3-0.7 is a multi-component complex brass, composed of Cu, Zn, Al, Mn, Si five elements. Chemical composition ratio: Cu61-63%, Mn2.7-3.7%, Al2.4-3.4%, Si0.5-1.0%Zn balance. Because of its excellent strength, hardness, corrosion resistance and wear resistance, it is widely used in the field of wear-resistant materials, and is the preferred material for synchronizer rings of cars, light vehicles and miniature vehicles. Pictures of corroded synchronizer rings before and after treatment image 3 with Figure 4 .

Embodiment 3

[0044] MBA-2 is a multi-component complex brass, composed of Cu, Zn, Mn, Al, Si, Ni, Cr seven elements. Chemical composition ratio: Cu59-65%, Al1.7-3.7%, Mn2.2-3.8%, Si0.5-1.3%, Ni0.2-0.6%, Cr0.07-0.27Zn balance. Because of its excellent strength, hardness, corrosion resistance and wear resistance, it is widely used in the field of wear-resistant materials. It is the preferred synchronizer ring material for Japanese cars, light cars and mini cars. Pictures of corroded synchronizer rings before and after treatment Figure 5 with Image 6 .

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Abstract

The invention discloses a rust-removing and spot-removing method for a synchronizer gear ring. The method comprises steps of removing oil; performing rust-removing and spot-removing treatment by using a rust-removing and spot-removing aqueous solution; rinsing the treated synchronizer gear ring in clear water; dipping the rinsed synchronizer gear ring in an aqueous soap solution; passivating the dipped synchronizer gear ring in a passivation solution; dipping the passivated synchronizer gear ring in water having a temperature of 60-80 DEG C; and drying. The method is simple in operation and low in investment. By the method, the synchronizer gear ring can regain a surface coating with high quality. The synchronizer gear ring treated by the steps is uniform and glossy and free from flow marks and environment pollution, and is passivated without the chromate. The synchronizer gear ring treated by the method cannot be corroded again in a storing process.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal materials, and relates to a method for removing rust and spots of brass alloy products, in particular to a method for removing rust and spots of a synchronizer gear ring. Background technique [0002] The rapid development of the automobile industry has led to the prosperity of the auto parts market, and the demand for synchronizer rings used in the auxiliary speed switching parts of the automobile gearbox synchronizer assembly is also increasing. However, during the production, storage and transportation of the synchronizer ring, it is often found that the ring is corroded, manifested as rust and spots, especially in the period from April to October every year, the probability of corrosion is higher. The surface layer of the ring reacts chemically with the surrounding medium. There are three manifestations: first: the sulfide reaction of the synchronizer ring in the sulfur-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02C23C22/68C23G1/10
Inventor 张叶全马双义
Owner 长春永新汽车同步器有限公司
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