激光毛化对6061铝合金的耐蚀性和涂层结合力影响  

Effect of Laser Texturing on Corrosion Resistance and Coating Adhesion of 6061Aluminum Alloy

作　　者：孙禹 林立峰 姜代旬 张志毅 王雨 Sun Yu;Lin Lifeng;Jiang Daixun;Zhang Zhiyi;Wang Yu(CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266000,Shandong,China;School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266000 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《应用激光》2023年第7期73-80,共8页Applied Laser

摘　　要：高铁动车铝合金车体在涂装前需要进行毛化以提升涂漆性能,使用准连续1500 W光纤激光器在6061铝合金表面开展系统的激光毛化工艺试验研究。通过单因素分析法分析脉冲宽度、激光功率、扫描速度对毛化形貌的影响规律。观测分析毛化前后表面的粗糙度、耐腐蚀性和涂层结合力。结果表明,激光参量对毛化形貌尺寸有显著影响;毛化后表面的腐蚀速率可以降至毛化前的1/3;富有凹坑和凸起的毛化形貌显著提高了表面的涂层结合力,可达未处理的2倍以上。The aluminum alloy body of the high-speed train needs to be textured before painting to improve the painting performance.The QCW 1500Wfiber laser is used to carry out systematic experiments of laser roughen process on the 6061aluminum alloy die steel surface.The influence of pulse width,laser power,and scanning speed were analyzed by single factor method.The roughness,corrosion resistance,and coating adhesion before and after texturing were measured.The results show that the laser parameters have significant impact on the textured shape and size.The corrosion rate of the surface after texturing can be reduced to 1/3of that before texturing.The textured morphology with one side pit and one side convexity significantly improves the coating adhesion on the surface,which can reach more than 2times that before texturing.

关 键 词：激光技术 激光毛化 结合力 耐蚀性 

分 类 号：TN249[电子电信—物理电子学]