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Laser desorption processing method for steel plate surface

A processing method and technology for steel plates, applied in chemical instruments and methods, cleaning methods and utensils, etc., can solve problems such as high cost and environmental impact, and achieve the effects of simple equipment configuration, small investment and small footprint

Inactive Publication Date: 2009-04-01
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, the cleaning treatment of the steel plate surface before coating is mainly realized by wet treatment such as alkali cleaning and pickling, but because this wet treatment involves the discharge and treatment of waste water, there are environmental impacts and relatively high costs. high problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The annealed steel plate sample after cold rolling was taken for surface laser desorption treatment. The residues on the sample surface are carbonaceous mixture and iron powder. Using a single laser light source, the irradiated laser wavelength is 193nm, and the irradiation intensity is 10 7 W·cm -2 After 5 times of irradiation, the residual carbon and iron powder on the surface of the sample were measured, and it was found that more than 85% of the residual carbon mixture was removed, and 35% of the iron powder on the surface was removed. The surface of the treated sample was observed by SEM (ie, scanning electron microscope), and the surface morphology and roughness of the sample did not change.

Embodiment 2

[0021] The steel plate samples without annealing treatment after cold rolling were taken for surface laser desorption treatment. The residues on the sample surface are residual lubricating oil and iron powder. Using two laser light sources, the first irradiation processing laser wavelength is 193nm, and the irradiation intensity is 10 7 W·cm -2 , the second irradiation treatment laser wavelength 532nm, irradiation intensity 10 8 W·cm -2 . After 5 times of irradiation by the first laser light source, 83% of the residual oil and 35% of the iron powder on the surface of the sample were removed. The second irradiation treatment is carried out on the first irradiation treatment sample, and after 5 irradiations, the residual oil removal amount is over 95%, and the iron powder removal amount reaches over 75%. The SEM method was used to observe the surface of the treated sample, and the results showed that no matter after the first irradiation or the second irradiation, the surfa...

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Abstract

The invention relates to a method for processing and treating material surfaces, in particular to a method for carrying out decontamination treatment to the organic matters and ferrous power left on steel plate surfaces. A laser desorption treatment method for the steel plate surfaces is provided, which adopts laser to carry out irradiation to the steel plate surfaces which then generate photochemistry and / or photothermy to eliminate the organic residues on the steel plate surfaces mainly by the photochemistry and eliminate the ferrous power on the steel plate surfaces by the photothermy, and the irradiation intensity of the adopted laser is less than 10<9>W question mark cm<-2> but higher than 10<6>W question mark cm<-2>; a plurality of times of irradiation is carried out to the steel plate under certain wavelength and irradiation intensity; irradiation is carried out to the steel plate by the laser adopting different wavelengths and irradiation intensities for once or a plurality of times; and the wavelength of the laser is between 180nm to 600nm. The method eliminates the organic residues and the ferrous powder on the steel plate surfaces by carrying out laser irradiation to the steel plate surfaces, thus having good decontamination result and high efficiency.

Description

technical field [0001] The invention relates to a material surface processing and treatment method, in particular to a decontamination treatment method for residual organic matter and iron powder on the surface of a steel plate. Background technique [0002] In order to improve corrosion resistance, electroplated or hot-dip steel sheets are increasingly used in industries such as automobile manufacturing, and the technology of obtaining surface-coated steel sheets by vacuum coating methods is also rapidly developing recently. Regardless of electroplating, hot-dip plating or vacuum plating, the performance of the coating on the steel plate surface is directly related to the treatment state of the steel plate surface before coating processing, especially the bonding force between the coating and the substrate surface is greatly affected by the residue on the substrate surface. [0003] The original plate of the coated plate is generally a cold-rolled plate, and the production ...

Claims

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Application Information

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IPC IPC(8): C23G5/00B08B7/00
Inventor 傅建钦
Owner BAOSHAN IRON & STEEL CO LTD
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