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Laser cleaning method of heavy corrosion layer

A technology of laser cleaning and laser beam, applied in the direction of cleaning methods and utensils, chemical instruments and methods, etc., can solve problems such as difficult to obtain removal effect, achieve high efficiency, reduce cleaning effect, and improve efficiency

Pending Publication Date: 2018-11-13
江苏峰钛激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, laser cleaning mainly adopts line scanning method to remove rust, and the effect is good for the surface with low degree of corrosion. However, it is difficult to obtain satisfactory removal effect for the surface with severe corrosion.

Method used

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  • Laser cleaning method of heavy corrosion layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In this example, the single pulse energy of the pulse laser is 1mJ, the frequency is 100KHZ, the pulse width of the pulsed laser beam 1 emitted is 10ns, the wavelength is 1064nm, the diameter of the laser spot is 50μm; the thickness of the rust layer is 150μm, and the main component is Fe 2 o 3 ;

[0015] The number of laser pulses irradiated at the same laser cleaning point is 30, and the laser cleaning efficiency is 0.3m 2 / h, after laser cleaning, the rust layer on the workpiece surface was successfully removed.

Embodiment 2

[0017] In this example, the single pulse energy of the pulse laser is 10mJ, the frequency is 50KHZ, the pulse width of the pulsed laser beam 1 emitted is 100ns, the wavelength is 1064nm, the diameter of the laser spot is 100μm; the thickness of the rust layer is 300μm, and the main component is Fe 2 o 3 ;

[0018] The number of laser pulses irradiated at the same laser cleaning point is 15, and the laser cleaning efficiency is 0.8m 2 / h, after laser cleaning, the rust layer on the workpiece surface was successfully removed.

Embodiment 3

[0020] In this example, the single pulse energy of the pulse laser is 50mJ, the frequency is 10KHZ, the pulse width of the emitted pulse laser beam 1 is 100ns, the wavelength is 1064nm, the diameter of the laser spot is 200μm; the thickness of the rust layer is 500μm, and the main component is Fe 2 o 3 ;

[0021] The number of laser pulses irradiated at the same laser cleaning point is 20, and the laser cleaning efficiency is 1.2m 2 / h, after laser cleaning, the rust layer on the workpiece surface was successfully removed.

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Abstract

The invention discloses a laser cleaning method of a heavy corrosion layer. N laser pulses are continuously irradiated on the same laser cleaning point position, n is equal to 3t / G, a laser beam is moved to the next laser cleaning point position, the n laser pulses are continuously irradiated, the steps are repeated until the whole surface to be processed is cleaned, and under the action of laserhigh-frequency thermal power, a corrosion layer with the same laser cleaning point position generates high-frequency oscillation, so that the corrosion layer can be better broken and stripped from thesurface of a workpiece, the thickness of the corrosion layer which can be cleaned is larger under the same laser parameters, and the efficiency is higher; and the distance d between every two adjacent laser cleaning point positions is equal to 3D-5D, the laser cleaning efficiency can be greatly improved, and the cleaning effect cannot be reduced. The laser cleaning method can be applied to the surface rust removal of steel products of a heavy rust layer.

Description

technical field [0001] The invention relates to the field of surface treatment, in particular to a laser cleaning method for a heavily corroded layer. Background technique [0002] After long-term use of ships and steel structures, a heavy rust layer will be formed on the surface. It is necessary to remove the heavy rust layer and re-do anti-rust and anti-corrosion treatment to prolong the service life. Commonly used rust removal methods mainly include shot blasting and water jet cleaning. These two cleaning methods have been difficult to meet the national environmental protection requirements due to serious environmental pollution. Laser cleaning is a new type of cleaning method, which is environmentally friendly and can effectively remove the rust layer attached to the surface of steel products. At present, laser cleaning mainly adopts the method of line scanning to remove rust, and the effect is good for the surface with a low degree of corrosion, but it is difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00
CPCB08B7/0042
Inventor 蒋飞益戴峰泽裴利峰杭可望冯强
Owner 江苏峰钛激光科技有限公司