A laser cleaning and polishing composite processing method for carbon steel surface

A laser cleaning and composite processing technology, applied in cleaning methods and utensils, laser welding equipment, metal processing equipment, etc., can solve the problem that the surface performance and production efficiency are not achieved, the surface roughness is not optimal, and the topographic surface is not obtained. and other problems, to achieve the effect of facilitating automated production, increasing surface defects, and avoiding heat superposition

Active Publication Date: 2021-05-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the thermal melting and vaporization of the rust layer caused by laser energy, the disadvantages of thermal damage to the subsurface of the steel substrate are not completely avoided, and the surface roughness is not optimal.
Similarly, ultrasonic cleaning of carbon steel with alcohol and distilled water after the laser derusting is completed can clean the remaining impurities and debris on the surface, and fundamentally does not obtain a smooth surface.
In addition, carbon steel samples after laser cleaning are used for surface treatment such as grinding and polishing or chemical mechanical polishing (CMP). Due to labor costs and long time consumption, the balance between surface performance and production efficiency has not been achieved.

Method used

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  • A laser cleaning and polishing composite processing method for carbon steel surface
  • A laser cleaning and polishing composite processing method for carbon steel surface
  • A laser cleaning and polishing composite processing method for carbon steel surface

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Experimental program
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Embodiment 1

[0036]Such asfigure 1 ,figure 2 withimage 3 As shown, the present embodiment discloses a laser cleaning and polishing composite processing method for the surface of the carbon steel, which mainly includes the specifically steps:

[0037]Step S1: Preparation of carbon steel samples that completely cover the corrosion layer, the copolymerized microscope measures its corrosive layer thickness, surface profile gauge measurement surface roughness, and positioned, placed on nanosecond pulsed laser processing X / Y / Z workbench .

[0038]Step S2: Start the nancy pulse laser processing system and regulate the output wavelength λ, the phototraum waist radius ω, the maximum output power P, the pulse width τ, the repetition frequency f, the scanning speed V, and the process parameters such as the output wavelength λ, the phototrammolle width τ, the repetition frequency F, the scanning speed V. Different energy density and spot overlap ratios are possible to meet the energy density required for lase...

Embodiment 2

[0056]Such asFigure 1 to 3As shown, the present embodiment discloses a laser cleaning and laser polishing composite method for the surface of the carbon steel material.figure 1 As shown, mainly includes the following steps:

[0057](1) Preparation of a carbon steel sample having a thickness having a thickness of the rust layer, the copolymerization microscope measures its rust layer thickness of 25 μm, the surface profile meter measures the surface roughness SA of 3.3 μm, positioned, placed in nanosecond pulse Laser processing X / Y / Z workbench;

[0058](2) Start the laser processing system, the laser is a near-infrared nanosecond fiber laser. The laser processing system output wavelength λ is 1064 nm, the phototraum waist radius ω = 20 μm; the maximum output power P is 20W, the pulse width τ = 4 ~ 200 ns, the repetition frequency f = 0 ~ 2000mm / s process Parameters can be adjusted. Different energy density and spot overlap ratios are achieved by the regulation of the above process pa...

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Abstract

The invention discloses a laser cleaning and polishing composite processing method for the surface of carbon steel. The method enables the two processes of laser cleaning and laser polishing to be seamlessly combined and used on the same equipment, and can be widely used in the surface laser of steel parts. Treatment, use a nanosecond pulse laser with a certain output energy range to vaporize the rust layer, use one laser treatment to quickly remove the rust layer on the carbon steel surface, and then adjust the laser parameters to radiate the cleaned surface to make the carbon steel protrude The molten material flows, fills the depressions and solidifies, resulting in a polished surface with less roughness and improved properties. In order to overcome the deficiencies in the existing technology, the melting pits and micro-scale defects on the carbon steel surface after laser cleaning are effectively repaired, the surface roughness is reduced, and the laser processing efficiency of carbon steel is improved and the surface properties are maintained.

Description

Technical field[0001]The present invention relates to the field of surface laser processing techniques of carbon steel materials, and more particularly to laser processing methods and apparatus for laser cleaning and laser polishing composite for carbon steel materials.Background technique[0002]Industry in which metal production, engineering construction, ship manufacturing, etc. is closely related to steel materials, effectively removes pollutants of steel, have always been a problem that everyone is concerned. The continuous development of pulsed laser technologies such as lasers and tune Q, lockup lay laid the foundation of laser cleaning technology. Laser cleaning as a emerging cleaning process, a series of physics and chemical reactions have been effectively removed in the surface of the pulsed laser radiation contaminants in the carbon steel surface. The high laser output energy causes the vaporization of the rust layer to increase the striking efficiency, and the steel substr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/354B23K26/082B23K26/0622B08B7/00B23K103/04
Inventor 谢小柱黄庆澎
Owner GUANGDONG UNIV OF TECH
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