退火温度对5A02铝合金管材组织与晶间腐蚀性能的影响  

Influence of annealing temperature on microstructure and intergranular corrosion resistance of 5A02 aluminum alloy tube

作　　者：王建峰 邓运来[2,3] 赵波 崔友江 许雪红 WANG Jianfeng;DENG Yunlai;HAO Bo;CUI Youjang;XU Xuehong(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 2661ll,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China;Light Alloy Research Institute,Central South University,Changsha 410083,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266111 [2]中南大学材料科学与工程学院,湖南长沙410083 [3]中南大学轻合金研究院,湖南长沙410083

出　　处：《轻合金加工技术》2024年第4期36-43,共8页Light Alloy Fabrication Technology

基　　金：制动系统用铝合金管路耐腐蚀性能评估(SF/JS-徐字-2023-229)。

摘　　要：使用扫描电子显微镜(SEM)、能谱分析(EDS)、电子背散射衍射(EBSD)和金相显微镜分析了退火温度对5A02铝合金管材组织和晶间腐蚀性能的影响,通过晶间腐蚀试验评估了5A02铝合金管材抗晶间腐蚀性能。结果表明,保持1 h退火时间,退火温度升高,5A02铝合金管材的组织由纤维组织向再结晶组织转变;当退火温度低于300℃时,管材的抗晶间腐蚀性能随温度升高而上升;当退火温度高于300℃时,管材的抗晶间腐蚀性能随温度升高而下降。The effect of annealing temperature on the microstructure and intergranular corrosion performance of 5A02 aluminum alloy tubes was analyzed using scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),electron backscatter diffraction(EBSD),and metallographic microscope.The intergranular corrosion resistance of the tubes was evaluated through intergranular corrosion experiments.The results show that with an in-crease in annealing temperature,the microstructure changes from low fiber to recrystallization after maintaining an annealing time of 1 hour.When the annealing temperature is below 300℃,theintergranular corrosion resistance increases as temperature rises.When the annealing temperature is above 300℃,it decreases as temperature rises.

关 键 词：5A02铝合金管材 退火处理 微观组织 晶间腐蚀 

分 类 号：TG166.3[金属学及工艺—热处理]