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Laser cleaning and polishing composite processing method for surface of carbon steel

A technology of laser cleaning and composite processing, which is applied in the direction of cleaning methods and tools, laser welding equipment, metal processing equipment, etc., and can solve the problem of not achieving surface performance and production efficiency, not achieving optimal surface roughness, and not obtaining topographical surfaces and other issues, to achieve the effect of facilitating automated production, increasing surface defects, and avoiding heat superposition

Active Publication Date: 2019-05-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Laser cleaning and polishing composite processing method for surface of carbon steel
  • Laser cleaning and polishing composite processing method for surface of carbon steel
  • Laser cleaning and polishing composite processing method for surface of carbon steel

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Embodiment 1

[0036] Such as figure 1 , figure 2 and image 3 As shown, this embodiment discloses a laser cleaning and polishing composite processing method for the surface of carbon steel. The processing method mainly includes the following specific steps:

[0037] Step S1: Prepare a carbon steel sample whose surface is completely covered with a rust layer, measure the thickness of the rust layer with a confocal microscope, and measure the surface roughness with a surface profiler, and position and place it on the nanosecond pulse laser processing X / Y / Z workbench .

[0038] Step S2: Start the nanosecond pulse laser processing system and adjust the output wavelength λ, spot beam waist radius ω, maximum output power P, pulse width τ, repetition frequency f, scanning speed v and other process parameters of the laser processing system. Through the adjustment of the above process parameters, the design of different energy densities and spot overlapping ratios can be realized, so as to meet ...

Embodiment 2

[0056] Such as Figure 1 to Figure 3 As shown, this embodiment discloses a composite method of laser cleaning and laser polishing for the surface of carbon steel materials, the process is as follows figure 1 As shown, it mainly includes the following steps:

[0057] (1) Prepare a carbon steel sample with a certain thickness whose surface is completely covered with a rust layer. The thickness of the rust layer is 25 μm measured by a confocal microscope, and the surface roughness Sa is 3.3 μm measured by a surface profiler, and positioned and placed in a nanosecond pulse Laser processing X / Y / Z workbench;

[0058] (2) Start the laser processing system, and the laser is a near-infrared nanosecond fiber laser. Laser processing system output wavelength λ is 1064nm, spot beam waist radius ω=20μm; maximum output power P is 20W, pulse width τ=4~200ns, repetition frequency f=0~1000khz, scanning speed v=0~2000mm / s process Parameters are adjustable. Through the adjustment of the above...

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Abstract

The invention discloses a laser cleaning and polishing composite processing method for the surface of carbon steel. By means of the method, laser cleaning and laser polishing processes are seamlesslycombined and used on the same equipment. The method can be widely applied to surface laser processing of steel parts. A nanosecond pulse laser with a certain output energy range is used, so that a corrosion layer can be evaporated; the corrosion layer on the surface of the carbon steel is quickly removed by utilizing primary laser treatment; and then laser parameters are adjusted to radiate a cleaned surface to enable a protruding fused object on the carbon steel to flow and fill and solidify a sunken part, and the polished surface with small roughness and improved performance is obtained. Therefore, defects in the prior art are overcome, fusion pits and micro-scale defects of the surface of the carbon steel after laser cleaning can be effectively repaired, the surface roughness is reduced, and the purposes of improving the laser processing efficiency of the carbon steel and keeping the surface performance are achieved.

Description

technical field [0001] The invention relates to the technical field of laser processing of carbon steel materials, in particular to a laser processing method and device for combining laser cleaning and laser polishing of carbon steel materials. Background technique [0002] In industries closely related to the use of steel materials such as metal production, engineering construction, and shipbuilding, the effective removal of pollutants on the surface of steel has always been a problem of concern. The continuous development of pulsed laser technologies such as lasers and Q-switching and mode-locking has laid a technical foundation for the development of laser cleaning technology. As an emerging cleaning process, laser cleaning mainly uses high-peak-power pulsed lasers to irradiate the surface of the pollutants to effectively remove a series of physical and chemical reactions. It has great potential for development in the field of rust removal on carbon steel surfaces. The v...

Claims

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Application Information

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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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