Al-Mg-Si合金的热变形行为及微观组织演变  

Hot deformation behavior and microstructure evolution of Al-Mg-Si aluminum alloy

作　　者：滕敦波[1] 尹起 裴高登 王志蒙 李辉[1,2] Teng Dunbo;Yin Qi;Pei Gaodeng;Wang Zhimeng;Li Hui(Yantai Nanshan University,Yantai Shandong 265713,China;Department of Automotive Plate,Shandong Nanshan Aluminum Co.,Ltd.,Yantai Shandong 265700,)

机构地区：[1]烟台南山学院,山东烟台265713 [2]山东南山铝业股份有限公司汽车板事业部,山东烟台265700

出　　处：《金属热处理》2018年第11期66-69,共4页Heat Treatment of Metals

基　　金：山东省高校科研计划(J18KA028);烟台市重点研发计划(2017ZH081)

摘　　要：利用Gleeble3500热模拟试验机研究了Al-Mg-Si合金的热变形行为,利用OM观察了显微组织,XRD测试了宏观织构构成,EBSD表征了基体晶粒演变。试验结果表明：在较低的应变温度下,应力对应变速率不敏感,而在较高的变形温度下,应变速率对应力的影响较明显;在300℃的变形温度下,Brass织构与Goss织构的含量明显高于高变形温度下,而R再结晶织构的含量随应变温度的升高表现出逐步增加的趋势。随变形温度的升高,晶粒尺寸减小,在500℃时最小,平均约为100μm。The hot deformation behavior of Al-Mg-Si aluminum alloy was studied by using Gleeble3500 simulation tester. The microstructure and grains were characterized by means of OM and EBSD. The texture constitution was studied by means of XRD. The results indicate that the stress is insensitive to strain rate under lower deformation temperature,while has obvious response to strain rate under higher temperatures. The content of Brass texture and Goss texture is higher under low temperature （300 ℃） than deformed under high temperatures,but the content of R texture has increasing trend with temperature increase. The grain size is decreased with increasing deformation temperature and has a value of about 100 μm after deformed at 500 ℃.

关 键 词：AL-MG-SI合金 热变形行为 组织演变 织构 

分 类 号：TG156.2[金属学及工艺—热处理]