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Anti-corrosion and heat tinting composite surface treating method for steel

A composite surface treatment and anti-corrosion technology, which is applied in the direction of surface polishing machine tools, coatings, metal material coating processes, etc., can solve the problems of single surface color and poor decoration, and achieve low raw material costs, low product costs, and adaptability wide range of effects

Inactive Publication Date: 2009-01-28
余煌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the salt bath nitriding or nitrocarburizing method and gas nitriding or nitrocarburizing method can obtain excellent wear resistance and corrosion resistance, the surface color after treatment is single and the decoration is poor. It also needs to be further improved, which is one of the main reasons restricting its large-scale application

Method used

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  • Anti-corrosion and heat tinting composite surface treating method for steel
  • Anti-corrosion and heat tinting composite surface treating method for steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: blue steel pipe

[0028] 1. Immerse the No. 45 steel pipe blank in 5% dilute hydrochloric acid for 10 minutes to remove rust, and then polish it to make the surface roughness less than Ra0.8;

[0029] 2. Put it into the tempering furnace to preheat to 320 degrees Celsius and keep it warm for 30 minutes;

[0030] 3. Put it into a 25KW well-type atmosphere furnace, the flow rate of ammonia gas is 1.2 cubic meters per hour, the amount of ethanol drops is 80 drops per minute, the reaction temperature is 570°C, the reaction time is 2 hours, and the furnace is water-cooled;

[0031]4. Fine polishing, first vibrating polishing, and then fine polishing with hemp wheel + cloth wheel to make the surface roughness less than Ra0.4, remove grease, use sodium hydroxide 60-80g / l, sodium phosphate 20-40g / l, silicic acid Sodium 3-10g / l, total alkalinity (equivalent to NaOH) 65-100g / l, temperature 70-90°C, until exhausted;

[0032] 5. For tempering and oxidation coloring, pr...

Embodiment 2

[0036] Example 2: golden yellow sofa legs

[0037] 1. The obtained blank has been derusted, so the derusting process is omitted. First, the surface of the stamped blank of No. 23 steel is polished to obtain a smooth surface, so that the surface roughness is less than Ra0.8;

[0038] 2. Put it into the tempering furnace to preheat to 320 degrees Celsius and keep it warm for 30 minutes;

[0039] 3. Put it into a salt bath furnace, carry out nitriding treatment at 570 degrees for 1.5 hours, take it out of the furnace to cool it in water, and then wash it in warm water at 60 degrees to remove the residual nitride salt on the surface;

[0040] 4. Fine polishing, first vibrating polishing, and then fine polishing with hemp wheel + cloth wheel to make the surface roughness less than Ra0.4, remove grease, use sodium hydroxide 60-80g / l, sodium phosphate 20-40g / l, silicic acid Sodium 3-10g / l, total alkalinity (equivalent to NaOH) 65-100g / l, temperature 70-90°C, until exhausted;

[004...

Embodiment 3

[0045] Example 3: golden yellow sofa legs

[0046] 1. The obtained blank has been derusted, so the derusting process is omitted. First, the surface of the stamped blank of No. 23 steel is polished to obtain a smooth surface, so that the surface roughness is less than Ra0.8;

[0047] 2. Put it into the tempering furnace to preheat to 320 degrees Celsius and keep it warm for 30 minutes;

[0048] 3. Put it into a salt bath furnace, carry out nitriding treatment at 570 degrees for 1.5 hours, take it out of the furnace to cool it in water, and then wash it in warm water at 60 degrees to remove the residual nitride salt on the surface;

[0049] 4. Fine polishing, first vibrating polishing, and then fine polishing with hemp wheel + cloth wheel to make the surface roughness less than Ra0.4, remove grease, use sodium hydroxide 60-80g / l, sodium phosphate 20-40g / l, silicic acid Sodium 3-10g / l, total alkalinity (equivalent to NaOH) 65-100g / l, temperature 70-90°C, until exhausted;

[005...

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Abstract

The invention relates to a method for treating the anti-corrosion and oxidized and colored composite surface of steel, and pertains to the metal material surface treatment technical field. Derusting and polishing are first carried out to a steel material so as to lead the roughness degree of the material surface to reach the requirement, and pre-oxidation is carried out to the treated blank; the pre-oxidated blank is put into a salt bath furnace to react and then a carburizing salt residual on the surface is washed off, or the pre-heated blank is put into an atmosphere of ammonia and ethanol to react, the blank for carburizing treatment is vibrantly polished, and polishing wax or grease residual on the surface is cleaned; the polished blank is put into tempering atmosphere for coloring, or immersed in the water solution of sodium hydroxide and sodium nitrite to be colored, and finally, sealing treatment is carried out. The method of the invention can cause that the colored composite film of the steel surface has the excellent performances of wear resistance and anti-corrosion, and the products prepared by the steel material of the invention have good ornamental performance. The method of the invention has simple technology process, low product cost, and no environmental pollution, does not change external dimension of the products, and can be used for coloring treatment of various carbon steels and alloy steels.

Description

technical field [0001] The invention relates to a steel anti-corrosion and oxidation coloring composite surface treatment method, which belongs to the technical field of metal material surface treatment. Background technique [0002] There are many ways to modify the surface of steel materials or steel parts, the purpose of which is mainly to improve the wear resistance and corrosion resistance of steel materials. Commonly used treatment techniques are: bluing, phosphating, surface chrome plating, salt bath nitriding or nitrocarburizing, gas nitriding, etc. Bluing, phosphating, etc. belong to the traditional surface treatment technology, mainly relying on the porous Fe formed by oxidation. 3 o 4 However, the improvement of steel properties is limited and cannot meet people's increasing requirements for steel properties. The chrome plating method is divided into two types: hard chrome plating and decorative chrome plating. Hard chrome plating is mainly used to improve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C23C8/56C23C8/26C21D1/74B24B29/00
Inventor 余煌
Owner 余煌
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