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A surface strengthening process for auto parts

A technology for auto parts and surface strengthening, which is applied in the direction of pretreatment surface, metal material coating process, and device for coating liquid on the surface, etc. It can solve the problem of lack of recovery and improve the surface hardness of the surface strengthening process of auto parts. Problems such as surface hardness and surface performance damage are relatively large, so as to overcome the difficulty of long-term adhesion, restore and improve hardness, and weaken the effect of strengthening performance

Active Publication Date: 2019-03-12
宁波明望汽车饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, every cleaning and polishing means damage to the original auto parts, no matter how good the performance of the subsequent spray glaze is, it cannot restore it to its original state
Among them, the surface hardness is the one that damages the surface performance of auto parts greatly but the current treatment method has not improved well.
Therefore, there is currently a lack of surface strengthening processes for auto parts that restore and improve surface hardness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A surface strengthening process for auto parts, comprising the following steps: 1) Spraying: at a temperature of 40°C, spray the degreaser on the surface of the auto parts to be treated for 2 minutes, repeat the spray after 2 minutes, and spray 3 times in total , and then washed with water; the degreasing agent is a mixed solution of sodium hydroxide and trisodium phosphate in a ratio of 1:0.5, and the concentration of the sodium hydroxide is 0.05mol / L;

[0032] 2) Polishing: first polish with 200 purpose sandpaper, then drop into chemical polishing reagent to carry out chemical polishing, wash with water, blow dry; Chemical polishing reagent is nitric acid and glacial acetic acid that the ratio of the amount of substance is 1: 0.5; The concentration of nitric acid is 1mol / L;

[0033] 3) Gas nitriding: heat at 100°C for 2 hours, feed ammonia and methanol at the same time, heat at 300°C and hold for 4 hours;

[0034] 4) Primary coating: at 50°C and 10% humidity, evenly...

Embodiment 2

[0038] A surface strengthening process for auto parts, comprising the following steps:

[0039] 1) Spraying: at a temperature of 50°C, spray the degreasing agent on the surface of the auto parts to be treated for 1 minute, repeat the spraying after an interval of 3 minutes, spray 5 times in total, and then wash with water; the degreasing agent is the amount of the substance The ratio is the mixed solution of sodium hydroxide and trisodium phosphate of 1:1, and the concentration of described sodium hydroxide is 0.1mol / L;

[0040] 2) polishing: first polish with 800 purpose sandpaper, then drop into chemical polishing reagent and carry out chemical polishing, wash with water, blow dry; Chemical polishing reagent is nitric acid and glacial acetic acid that the ratio of the amount of substance is 1: 1; The concentration of nitric acid is 2mol / L;

[0041] 3) Gas nitriding: heat at 150°C for 1 hour, feed ammonia and methanol at the same time, heat at 400°C and hold for 2 hours;

...

Embodiment 3

[0046]A surface strengthening process for auto parts, comprising the following steps: 1) Spraying: at a temperature of 45°C, spray the degreasing agent on the surface of the auto parts to be treated for 1.5 minutes, repeat the spraying after 2.5 minutes, and spray together 4 times, then washed with water; the degreasing agent is a mixed solution of sodium hydroxide and trisodium phosphate with a ratio of substance amount of 1:0.8, and the concentration of the sodium hydroxide is 0.08mol / L;

[0047] 2) Polishing: first polish with 500-purpose sandpaper, then drop into chemical polishing reagent to carry out chemical polishing, wash with water, blow dry; Chemical polishing reagent is nitric acid and glacial acetic acid that the ratio of the amount of substance is 1: 0.8; The concentration of nitric acid is 1.5 mol / L;

[0048] 3) Gas nitriding: heat at 120°C for 1.5h, feed ammonia and methanol at the same time, heat at 350°C and hold for 3h;

[0049] 4) Primary coating: Under th...

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Abstract

The invention discloses an automobile accessory surface strengthening technology which comprises the following steps: 1) spraying; 2) polishing; 3) gas nitriding; 4) primary coating; 5) spraying glaze; 6) secondary coating. A gas nitriding technology is applied to surface treatment of automobile accessories such as automobile chairs, car bodies and the like which are most made of a material of metal sheets and goes deep into surface layers of the automobile accessories, so that chemical composition and organization of the surface layers are changed, surface hardness of automobile accessories are restored and improved, oxidization and rusting are prevented, the service life is prolonged, a very good application prospect is achieved, and great economical benefits are brought.

Description

technical field [0001] The invention belongs to the technical field of auto parts production, in particular to a surface strengthening process of auto parts. Background technique [0002] Auto parts are the parts and accessories that make up the car, such as engine parts, brake parts, steering parts, walking parts, electrical instrument parts, auto lamps, car seats, body and so on. Most of these fittings are sheet metal, and sheet metal generally suffers from corrosion problems. Corrosion not only destroys the appearance of the car, but also directly affects the service life of the car, and at the same time brings environmental pollution, accidents, and waste of materials and energy. For this reason, the factory of auto parts needs to go through metal surface treatment. The surface treatment methods commonly used in automobiles are: electrochemical treatment (electroplating and anodic oxidation); coating (spraying, electrophoresis); chemical treatment (phosphating, passivat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D7/00B05D3/10B05D3/04C23C8/24C23C28/00
CPCB05D3/04B05D3/102B05D7/14B05D7/58B05D2506/10C23C8/24C23C28/00
Inventor 毛泽楠毛明光
Owner 宁波明望汽车饰件有限公司
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