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Method for treating surface blackening of automobile wheel hub

A technology for blackening the surface of automobile wheels, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as poor wear resistance, loss of protection effect, blackened film scratches, etc. , to achieve significant heat transfer effect, enhance blackening, and promote penetration

Inactive Publication Date: 2018-05-15
刘珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the manufacturing process of automobile wheels, blackening treatment is a common surface treatment method, which can make the automobile wheels have a higher gloss, and can effectively improve the wear resistance and corrosion resistance of the wheels, but the existing In the technology, the black film obtained by blackening treatment is not very good in wear resistance, and it is easy to scratch the black film during the use of the car wheel, thus losing the protective effect

Method used

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  • Method for treating surface blackening of automobile wheel hub

Examples

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Effect test

Embodiment 1

[0017] A method for blackening the surface of an automobile wheel hub, comprising the following steps:

[0018] (1) After cleaning the prepared automobile wheel hub, spray the modifying solution on the surface, then put it into the nitriding furnace, and preheat for 10 minutes, wherein the modifying solution is made of the following components by weight: 6 parts of sulfuric acid, 11 parts of trisodium isocitrate, 18 parts of copper citrate, 360 parts of water;

[0019] (2) Put the automobile wheel treated in step (1) into a salt bath furnace, raise the temperature to 520°C, and treat it in a salt bath for 60 minutes, wherein the base salt of the salt bath is made of the following components by weight: nitrogen 19 parts of carburizing base salt, 1 part of aluminum borate, 1 part of behenic acid amide;

[0020] (3) Put the automobile wheel hub treated in step (2) into the blackening solution, soak for 3 minutes, take it out, and wash it to obtain a finished product, wherein the...

Embodiment 2

[0026] A method for blackening the surface of an automobile wheel hub, comprising the following steps:

[0027] (1) After cleaning the prepared automobile wheel hub, spray the modifying liquid on the surface, then put it into the nitriding furnace, and preheat it for 13 minutes, wherein the modifying liquid is made of the following components by weight: 7 parts of sulfuric acid, 13 parts of trisodium isocitrate, 20 parts of copper citrate, 380 parts of water;

[0028] (2) Put the automobile wheel treated in step (1) into a salt bath furnace, raise the temperature to 530°C, and treat it in a salt bath for 65 minutes, wherein the base salt of the salt bath is made of the following components by weight: nitrogen 20 parts of carburizing base salt, 1 part of aluminum borate, 2 parts of behenic acid amide;

[0029] (3) Put the automobile wheel hub treated in step (2) into the blackening solution, soak for 4 minutes, take it out, and wash it to obtain a finished product, wherein the...

Embodiment 3

[0035] A method for blackening the surface of an automobile wheel hub, comprising the following steps:

[0036] (1) After cleaning the prepared automobile wheel hub, spray the modifying solution on the surface, then put it into the nitriding furnace, and preheat it for 15 minutes, wherein the modifying solution is made of the following components by weight: 8 parts of sulfuric acid, 16 parts of trisodium isocitrate, 22 parts of copper citrate, 400 parts of water;

[0037] (2) Put the automobile wheel treated in step (1) into a salt bath furnace, raise the temperature to 540°C, and treat it in a salt bath for 70 minutes, wherein the base salt of the salt bath is made of the following components by weight: nitrogen 22 parts of carburizing base salt, 2 parts of aluminum borate, 2 parts of behenic acid amide;

[0038] (3) Put the automobile wheel hub treated in step (2) into the blackening solution, soak it for 5 minutes, take it out, and wash it to obtain a finished product, whe...

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Abstract

The invention discloses a method for treating the surface blackening of an automobile wheel hub. The method comprises the following operation steps: (1) cleaning the formed automobile wheel hub, spraying modification liquid to the surface, putting the automobile wheel hub into a nitriding furnace for preheating treatment for 10 to 15 min; (2) putting the automobile wheel hub treated in the step (1) into a salt bath furnace, and heating to 520 to 540 DEG C for salt bath treatment for 60 to 70 min; and (3) putting the automobile wheel hub treated in the step (2) into blackening liquid for soaking treatment for 3 to 5 min, and taking out and cleaning the automobile wheel hub, thus obtaining a finished product. The automobile wheel hub prepared through the method provided by the invention is uniform in surface color, high in glossiness and excellent in quality, and the surface is excellent in corrosion resistance and oxidization resistance, and particularly has excellent wear resistance; and the surface hardness is high, so that the service life of the automobile wheel hub is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of automobile wheel hub preparation, and in particular relates to a method for blackening the surface of an automobile wheel hub. Background technique [0002] Wheel hub, the cylindrical metal part in the car tire with the axle as the center to support the tire, in layman's terms, is the part where the axle is installed in the center of the wheel, and is an important part connecting the brake drum (brake disc), wheel disc and half shaft part. In the manufacturing process of automobile wheels, blackening treatment is a common surface treatment method, which can make the automobile wheels have a higher gloss, and can effectively improve the wear resistance and corrosion resistance of the wheels, but the existing In the technology, the wear resistance of the black film obtained after blackening treatment is not very ideal, and it is easy to scratch the black film during the use of the automobile wheel hub, thu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/54C23C8/02C23C22/36
CPCC23C8/54C23C8/02C23C22/36
Inventor 刘珍
Owner 刘珍
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