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Electrothermal tube barrel burnishing process

A treatment process, electric heating tube technology, applied in metal material coating process, manufacturing tools, metal processing equipment, etc., can solve the problems of welding scale on the metal surface, easy to rust on the surface of electrothermal light, and can not be used, etc., to achieve a bright surface , Oxidation resistance improvement, the effect of prolonging the service life

Inactive Publication Date: 2014-09-10
JIANGSU SHUNFA ELECTRIC HEATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electric heating tube is a workpiece that has been working in a high-temperature and high-humidity environment for a long time. There is welding scale on the metal surface during manufacture. If the surface is not cleaned, it can be directly rolled and plated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0014] The specific steps of the electrothermal tube rolling treatment process of the present embodiment are as follows:

[0015] A. Treatment before tumbling.

[0016] Put 50 pieces of electric heating tubes made by welding and forming process into 65°C white steel aqueous solution for 12 minutes, then soak them in concentrated nitric acid solution for 5 seconds, then rinse with clean water, and clean the surface. After treatment, the surface of the electric heating tube is white in appearance, and the welding scale can be brushed off with a toothbrush.

[0017] The white steel aqueous solution is made of 12% white steel and clean water in a mass ratio of 14:100. The composition of molten steel is 30wt% phosphoric acid, 10wt% nitric acid, 15wt% hydrochloric acid, and the rest is water. Concentrated nitric acid solution is prepared from 70% nitric acid and water in a mass ratio of 70:30.

[0018] B. Tumble finish and wash.

[0019] Put 400 pieces of electric heating tube...

Embodiment 2）

[0024] The specific steps of the electrothermal tube rolling treatment process of the present embodiment are as follows:

[0025] A. Treatment before tumbling.

[0026] Put 50 pieces of electric heating tubes made by welding forming process into 50°C white steel aqueous solution for 6 minutes, then soak them in concentrated nitric acid solution for 5 seconds, then rinse with clean water, and clean the surface.

[0027] The white steel aqueous solution is made of white steel with a concentration of 12% and clean water in a mass ratio of 12:100. Concentrated nitric acid solution is prepared from 70% nitric acid and water at a mass ratio of 65:35.

[0028] B. Tumble finish and wash.

[0029] Put 400 pieces of electric heating tubes that have been treated before rolling into the rolling machine, add steel balls and clean water to completely cover the electric heating tubes. Add 160g of polishing agent and 80g of citric acid powder before tumbling, and tumbling for 12 minutes....

Embodiment 3）

[0034] The specific steps of the electrothermal tube rolling treatment process of the present embodiment are as follows:

[0035] A. Treatment before tumbling.

[0036] Put 50 pieces of electric heating tubes made by welding and forming process into 80°C white steel aqueous solution for 8 minutes, then soak them in concentrated nitric acid solution for 5 seconds, then rinse with clean water, and clean the surface.

[0037] The white steel aqueous solution is made of 12% white steel and clean water in a mass ratio of 16:100. Concentrated nitric acid solution is prepared from 70% nitric acid and water in a mass ratio of 75:25.

[0038] B. Tumble finish and wash.

[0039] Put 400 pieces of electric heating tubes that have been treated before rolling into the rolling machine, add steel balls and clean water to completely cover the electric heating tubes. Add 200g of polishing agent and 120g of citric acid powder before tumbling, and tumbling for 18 minutes. When tumbling is h...

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PUM

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Abstract

The invention relates to an electrothermal tube barrel burnishing process. The process comprises steps of conducting barrel burnishing pretreatment for an electrothermal tube, immersing the electrothermal tube into a steel washing solution of temperature of 50-80 DEG C for 6-12 minutes, immersing the electrothermal tube in a concentrated nitric acid solution for 4-6 seconds, washing the electrothermal tube and cleaning the surface of the electrothermal tube; conducting barrel burnishing for the electrothermal tube which is subjected to the barrel burnishing pretreatment, immersing the electrothermal tube which is subjected to the barrel burnishing in a dilute citric acid solution of temperature of more than 80 DEG C for 3-5 minutes, and washing the electrothermal tube; and conducting passivating treatment for the electrothermal tube, drying the electrothermal tube, during the passivating treatment, immersing the electrothermal tube in a dilute nitric acid solution for 8-12 seconds, immersing the electrothermal tube in a corrosion inhibition solution for 8-12 seconds, and filtering and washing the electrothermal tube. By the aid of the process, welding dirt, spots, stains and rust on the surface of the electrothermal tube can be cleaned effectively, and the plating quality of the electrothermal tube is improved.

Description

technical field [0001] The invention relates to a method for chemically treating metal surfaces. Background technique [0002] Metal materials need to be tumbled before being plated. Rolling treatment is a process in which batches of parts and grinding media are rotated in a drum at a low speed, and the relative movement of parts and abrasives is used for finishing treatment. Wet machining grinding media commonly used in the tumbling process contain abrasives, chemical accelerators (brighteners) and water. Good rolling treatment can effectively guarantee the quality of plating and prevent metal materials from being corroded. The electric heating tube is a workpiece that has been working in a high-temperature and high-humidity environment for a long time. There is welding scale on the metal surface during manufacture. If the surface is not cleaned, it can be rolled and plated directly. How to provide a more effective rolling treatment process for rolling the electric heati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B31/10C23G1/02C23C22/48C23C22/68
Inventor 沙国伟
Owner JIANGSU SHUNFA ELECTRIC HEATING MATERIAL