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2017 年,第44 卷,第12 期?1217? 激光功率对不锈钢表面清洗 效果影响的研究 陈国星 1*, 陆海峰 1, 赵 滢2, 张惠炜 2, 魏少 1, 季 骅1,吴树辉 1,史一岭

1

1 苏州热工研究院有限公司,江苏 苏州 215004;

2 大亚湾核电运营管理有限责任公司,广东 深圳

518124 摘要:利用激光清洗技术对不锈钢表面进行清洗试验,研究不同激光功率(300 W、400 W、500 W)对清洗效果的影响.

通过 SEM 和EDS 分析不锈钢表面清洗前后的表面形貌及成分分布;

利用白光干涉仪检测不锈钢表面粗糙度及清洗厚 度.结果表明,随着激光功率的增加,不锈钢表面氧化物逐渐分解剥落,清洗厚度不断加深,在500 W 时达到

50 μm, 并且造成基体部分损伤;

粗糙度值先降低后增加,在400 W 时达到最低值 0.38 μm.激光清洗的清洗阈值近似为 3.96*103 W/cm

2 ,基体损伤阈值在 5.52*10

3 W/cm

2 左右,不锈钢表面氧化层在

400 W 时达到最佳激光清洗效果. 关键词:激光清洗;

不锈钢氧化层;

激光功率;

粗糙度;

清洗厚度 中图分类号:TN249 文献标志码:A Effect of power on laser cleaning result of stainless steel surface Guoxing Chen1*, Haifeng Lu1, Ying Zhao2, Huiwei Zhang2, Shaochong Wei1, Hua Ji1, Shuhui Wu1 and Yiling Shi1

1 Suzhou Nuclear Power Research Institute, Suzhou 215004, China;

2 Daya Bay Nuclear Power Operations and Management Co., Ltd, Shenzhen 518124, China Abstract: Laser cleaning technology was used to clean the surface of stainless steel, and the influence of different laser power (300 W,

400 W,

500 W) on cleaning effect was studied. The surface morphology and composition dis- tribution of stainless steel were analyzed by SEM and EDS. The surface roughness and cleaning thickness were detected by White Light Interferometer. The results show that, with the increase of laser power, the oxide of stainless steel decomposes and flakes gradually, and the cleaning thickness keeps deepening and reaches

50 μm at

500 W, which causes partial damage to the matrix. The roughness value decreases firstly and then increases. It reaches a minimum value of 0.38 μm at

400 W. Laser cleaning threshold is approximately 3.96*103 W/cm

2 , and damage threshold is about 5.52*103 W/cm

2 . The best laser cleaning effect of stainless steel is obtained when the power is

400 W. Keywords: laser cleaning;

stainless steel oxide layer;

laser power;

roughness;

cleaning thickness DOI: 10.3969/j.issn.1003-501X.2017.12.010 Citation: Opto-Elec Eng, 2017, 44(12): 1217?1224 ? 47.409 ?m ? -25.811 ?m 收稿日期:2017?10?20;

收到修改稿日期:2017?11?25 *E-mail: [email protected] OEE | Advances

2017 年,第44 卷,第12 期1218?

1 引言激光清洗技术因为其环保、高效的特点,逐渐替 代传统的机械法和化学法去污方法,在工业生产、文 物修复等领域得到广泛的应用[1,2] .目前,激光清洗主 要以干式和湿式为主.干式激光清洗是指直接以高能 量激光照射物体表面,使物体表面污染物受热熔化气 化并产生超声波振动,达到去污效果;

湿式激光清洗 是指在物体表面添加化学液体,然后施加高能激光, 结合液体与物体表面污染物的相互作用使污染物去除 的方法[3-5] .? 目前,国内对于激光清洗的研究主要集中在合金 表面除漆[6,7] 、模具表面橡胶层的清理[8,9] 、半导体表面 颗粒物的清洁等[10] 方面,对于不锈钢管内部清洁研究 较少.目前管道清洁主要以化学酸碱法为主,但是其 对基体腐蚀较大,并产生大量污染.本课题采用激光 清洗技术对不锈钢管道进行清洗试验,探究不同的激 光功率对于激光清洗效果的影响,并探究其机理.?