A surface treatment process for an automobile engine cylinder head

A technology for surface treatment of automobile engines, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of complex surface treatment process, increased production cost, poor corrosion resistance, etc. The effect of enhanced scar ability

Inactive Publication Date: 2019-05-07
安徽世强机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the surface corrosion resistance of the automobile engine cylinder head in the prior art is poor, the service life is short, and the existing automobile engine cylinder head surface treatment process is relatively complicated, which increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A surface treatment process for an automobile engine cylinder head, comprising:

[0016] (1) Degreasing: Put the automobile engine cylinder head in a sodium tartrate solution with a mass concentration of 0.15%, soak it at 55°C for 2 hours, then filter, heat the surface to 140°C, keep it warm for 22min, and then cool it naturally to room temperature ;

[0017] (2) Alkaline cleaning: use a high-pressure water gun to rinse the surface of the automobile engine cylinder head with an alkaline solution for 12 minutes. The temperature of the alkaline solution is 60° C., and the injection pressure is 8 MPa. The alkaline solution is made of the following components by weight percentage: sodium carbonate 4.4%, sodium polyacrylate 0.5%, sodium lignosulfonate 0.3%, the rest is water;

[0018] (3) Gas treatment: Put the engine cylinder head into a closed cavity, discharge the air in the cavity through continuous nitrogen, and then inject fluorine gas and ammonia gas into the cavity ...

Embodiment 2

[0024] A surface treatment process for an automobile engine cylinder head, comprising:

[0025] (1) Degreasing: Put the automobile engine cylinder head in a sodium tartrate solution with a mass concentration of 0.15%, soak it at 60°C for 2 hours, then filter, heat the surface to 150°C, keep it warm for 22min, and then cool it naturally to room temperature ;

[0026] (2) Alkali washing: use a high-pressure water gun to rinse the surface of the automobile engine cylinder head with an alkaline solution for 15 minutes. The temperature of the alkaline solution is 64° C., and the injection pressure is 10 MPa. The alkaline solution is made of the following components by weight percentage: sodium carbonate 4.4%, sodium polyacrylate 0.5%, sodium lignosulfonate 0.3%, the rest is water;

[0027] (3) Gas treatment: Put the engine cylinder head into a closed cavity, discharge the air in the cavity through continuous nitrogen, and then inject fluorine gas and ammonia gas into the cavity to...

Embodiment 3

[0033] A surface treatment process for an automobile engine cylinder head, comprising:

[0034] (1) Degreasing: Put the automobile engine cylinder head in a sodium tartrate solution with a mass concentration of 0.15%, soak it at 58°C for 2 hours, then filter, heat the surface to 144°C, keep it warm for 22min, and then cool it naturally to room temperature ;

[0035] (2) Alkali cleaning: use a high-pressure water gun to rinse the surface of the automobile engine cylinder head with an alkaline solution for 13 minutes. The temperature of the alkaline solution is 62° C., and the injection pressure is 9 MPa. The alkaline solution is made of the following components by weight percentage: sodium carbonate 4.4%, sodium polyacrylate 0.5%, sodium lignosulfonate 0.3%, the rest is water;

[0036] (3) Gas treatment: Put the engine cylinder head into a closed cavity, discharge the air in the cavity through continuous nitrogen, and then inject fluorine gas and ammonia gas into the cavity to...

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PUM

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Abstract

The invention discloses a vehicle engine cylinder cover surface treatment process. The process comprises the steps of: (1) oil stain removal; (2) alkali washing; (3) gas treatment; (4) laser treatment; (5) acid leaching; and (6) water washing. The vehicle engine cylinder cover surface treatment process is simple, and can enable a cylinder cover to obtain a surface-clean appearance and a mildew-proof protective film; and the protective film is excellent in high color change resistance and corrosion resistance, so that the bright and beautiful cylinder cover is obtained, and achieves the effects of corrosion resistance and mildew prevention.

Description

technical field [0001] The invention relates to the field of surface treatment of auto parts, in particular to a surface treatment process of an automobile engine cylinder head. Background technique [0002] In the 20th century, with the development of society, the demand for automobiles is also increasing. The engine cylinder head is an important component of the automobile. The performance of the engine cylinder head is directly related to the performance of the entire automobile. [0003] However, the surface of the automobile engine cylinder head in the prior art has poor corrosion resistance and short service life, and the existing surface treatment process of the automobile engine cylinder head is relatively complicated, which increases the production cost. Contents of the invention [0004] The object of the invention is to provide a kind of automobile engine cylinder head surface treatment process, realize by following technical scheme: [0005] A surface treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C23G1/24C23G1/14C23F1/12C21D1/09C21D9/00C23G1/02
CPCC21D1/09C21D9/0068C23F1/12C23F17/00C23G1/02C23G1/14C23G1/24
Inventor 张家荣
Owner 安徽世强机械制造有限公司
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