摘要
通过三道次双温段热轧工艺制备了镁铝层合板,并采用不同退火工艺进行处理,并采用SEM和EDS对轧制态和退火态层合板界面的扩散行为进行了研究。结果表明:镁合金的减薄主要发生于高温段,双温段热轧中界面的氧化控制效果较好,轧制中的界面变化可分为三个阶段:表面破碎阶段、初步扩散阶段、增厚扩散阶段。在退火演化中,表面破碎阶段的界面在各温度下以氧化行为为主,而初步扩散阶段的界面扩散层厚度会随退火温度和时间的增加而少许增长,但并未出现扩散平台;增厚扩散阶段的界面在250~350℃退火时扩散层明显增厚,并由冶金结合向相变结合转化,扩散平台的形成时间随退火温度的升高而缩短。
Mg-Al laminates were prepared via three-pass double-temperature stage hot rolling process,and processed by different annealing processes.The diffusion behavior of the interface of the rolled and annealed laminates was studied via SEM and EDS energy spectrum analysis.It was found that in the double-temperature stage hot rolling process,the thinning of magnesium alloy mainly occurs in the high temperature stage and maintaining a suitable low temperature section can better control the oxidation of the interface.The change of the interface in the rolling process can be divided into three stages:surface broken stage,initial diffusion stage,and thickening diffusion stage.In the annealing evolution,the interface in the surface broken stage is dominated by oxidation at various temperatures,and the interface diffusion layer thickness in the initial diffusion stage will increase slightly with the increase of annealing temperature and time,but there is no diffusion platform.When the interface of the thickening diffusion stage is annealed in the range of 250-350℃,the diffusion layer becomes thicker and transforms from metallurgical combination to phase change combination.The formation time of the diffusion platform decreases with the increase of annealing temperature.
作者
赵博文
周存龙
赵广辉
王涛
张柏瑞
ZHAO Bowen;ZHOU Cunlong;ZHAO Guanghui;WANG Tao;ZHANG Borui(Shanxi Provincial Key Laboratory of Metallurgical Equipment Design Theory & Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《有色金属工程》
CAS
北大核心
2021年第7期25-33,共9页
Nonferrous Metals Engineering
基金
山西省“1331”工程平台项目
山西省科技重大专项(20181101008)
山西省重点研发项目(201903D421046)
第五批山西省新兴产业领军人才项目。
关键词
镁铝层合板
双温段热轧
退火
界面扩散行为
Mg-Al laminates
double-temperature stage hot rolling
annealing
interface diffusion behavior
