A numerical study on laser cleaning of epoxy resin paint layers from 7075 Aluminum Alloy surfaces

LIU Shouchen; LI Long; CHEN Junting; ZHANG Bole; ZHANG Chunling

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A numerical study on laser cleaning of epoxy resin paint layers from 7075 Aluminum Alloy surfaces

Laser Technology and Applications | 更新时间：2026-03-24

- A numerical study on laser cleaning of epoxy resin paint layers from 7075 Aluminum Alloy surfaces
- OPTICAL TECHNIQUE Vol. 52, Issue 2, Pages: 148-155(2026)
- 作者机构：
  
  1.西安建筑科技大学理学院，陕西西安710055
  2.西安建筑科技大学应用物理研究所，陕西西安710055
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN249
- Received：11 October 2025，
  
  Revised：2026-01-06，
  
  Published：20 March 2026
- 稿件说明：
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刘首辰,李隆,陈俊廷等.激光清洗7075铝合金环氧树脂漆层数值模拟研究[J].光学技术,2026,52(02):148-155.

LIU Shouchen,LI Long,CHEN Junting,et al.A numerical study on laser cleaning of epoxy resin paint layers from 7075 Aluminum Alloy surfaces[J].OPTICAL TECHNIQUE,2026,52(02):148-155.
刘首辰,李隆,陈俊廷等.激光清洗7075铝合金环氧树脂漆层数值模拟研究[J].光学技术,2026,52(02):148-155. DOI：

LIU Shouchen,LI Long,CHEN Junting,et al.A numerical study on laser cleaning of epoxy resin paint layers from 7075 Aluminum Alloy surfaces[J].OPTICAL TECHNIQUE,2026,52(02):148-155. DOI：

摘要

为了提升激光清洗7075铝合金表面环氧树脂漆层的效率并降低材料损耗，基于热传导理论和有限元分析方法，模拟高斯激光辐照过程并建立激光清洗的数值模型。通过调整脉冲激光平均功率、脉冲宽度及光斑搭接率，分析其对材料温度场与清洗效果的影响，并首次引入敏感性参数进行定量分析。研究表明，材料表面温度及清洗厚度与激光脉冲宽度、平均功率密度正相关，与光斑搭接率负相关。当激光平均功率为40W、脉冲宽度20ns、光斑搭接率70%时，铝合金基体温度超过熔点且受损；而当激光平均功率为25W、脉冲宽度20ns、光斑搭接率80%的条件下，漆层可被彻底去除且基体无损。其中光斑搭接率对清洗效果影响最显著。本研究明确了激光参数对清洗效果的量化影响，为7075铝合金表面漆层的高效绿色清洗提供了部分工艺参数指导。

Abstract

In order to enhance the efficiency of laser cleaning epoxy resin paint layers from 7075 aluminum alloy surfaces and reduce material loss

In this study

a numerical model was developed using the COMSOL Multiphysics simulation platform. The Gaussian laser beam irradiation process was investigated based on the principles of Fourier heat transfer theory and finite element analysis. By adjusting the influences of key parameters—including energy density

pulse duration

and spot overlap ratio—on the transient temperature field and the resultant cleaning efficacy were systematically examined

and the sensitivity parameter was introduced for the first time for quantitative analysis. The results demonstrate that both the surface temperature and the cleaning depth increase monotonically with pulse duration and mean power density

whereas they exhibit an inverse relationship with the laser spot overlap ratio. Specifically

when the laser has an average power of 40 W

a pulse length of 20 ns

and laser overlap rate of 70%

the temperature of the aluminum alloy substrate exceeds its molten temperature

resulting in sustained. In contrast

under conditions of 25W power

20 ns pulse length

and 80% laser overlap rate

the coating can be completely eliminated with no damage to the substrate. This study clarifies the quantitative impact of laser parameters on cleaning efficiency and provides guidance for optimizing the process parameters for efficient and eco-friendly cleaning of paint layers from 7075 aluminum alloy surfaces.

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references

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