摘要
为了研究激光对油气管道外防腐层剥离的可行性,以及漆层清除对基体性能的影响,采用短脉冲激光器对X65管线钢上的环氧树脂防腐层进行激光除漆实验。采用三维形貌测试仪对除漆后的表面进行测试,并使用扫描电镜与能谱分析仪对试样的表面和横截面进行测试分析。两个试样经不同工艺参数的激光扫描后,漆层基本全部剥离,基体表面呈现出密集的火山口形貌,表层以下出现了带状区和裂纹区;试样A、B表层以下带状区的厚度分别约为20μm和10μm,裂纹区厚度分别约为100μm和90μm,表层硬度均小幅提升。本研究所采用的激光参数既满足了钢管除漆的要求,又对表层起到了强化作用。管道激光除漆技术在技术上是可行的,值得深入研究。
To study the feasibility of laser exfoliation of the external coating of oil and gas pipelines and the effects of coating removal on the properties of the substrate, laser coating removal experiments were conducted on the epoxy resin coating on the X65 pipeline steel using a short-pulse laser. After coating removal, the pipe external surfaces were tested using a three-dimensional morphology tester. The surface and cross-section of each sample were tested and analyzed using scanning electron microscopy and energy spectrum analysis. After the two samples were irradiated using different laser technical parameters, the coating layers were almost completely exfoliated. At the same time, dense crater morphology was evident on the surface and strip-shaped and crack regions appeared below the surface. The strip-shaped regions beneath the surface were about 20 μm and 10 μm thick for samples A and B, respectively, while the crack regions were about 100 μm and 90 μm thick, respectively, and the hardness of both the samples′ surfaces increased slightly. The laser technical parameters used in this research not only meet the requirements of laser coating removal for steel pipes but also strengthen the surface. Thus, coating removal is technologically feasible for steel pipelines and valuable for further investigation.
作者
江国业
雷璞
刘宇平
李敏
庞铭
胡艳娇
Jiang Guoye;Lei Pu;Liu Yuping;Li Min;Pang Ming;Hu Yanjiao(College of Airport Engineering,Civil Aviation University of China,Tianjin 300300,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2020年第3期159-166,共8页
Chinese Journal of Lasers
基金
天津市研究生科研创新项目(2019YJSS070)
国家自然科学基金(U1633111)
中央高校基本科研业务费专项资金(19CX05007A)。
关键词
激光技术
激光除漆
X65管线钢
宏观形貌
显微组织
硬度
laser technique
laser coating removal
X65 pipeline steel
macroscopic morphology
microstructure
hardness
