AZ31B镁合金轧制过程中的温升效应  

Temperature Rise Effect of AZ31B Mg Alloy during Rolling

作　　者：丁云鹏[1] 朱强[1] 马庆武[1] 张志强[1] 乐启炽[1] 崔建忠[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819

出　　处：《稀有金属材料与工程》2017年第3期722-727,共6页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展计划("973"计划)(2013CB632203);辽宁省自然科学基金资助项目(2014028027);中央高校基本科研业务费专项资金资助(N120509002;N120309003)

摘　　要：采用内镶测温偶原位测量的方法测定了AZ31B镁合金在不同轧制工艺条件下的温度变化过程。结果表明:整个温度变化过程分为变形过程(0.02~0.08 s)和温度均匀过程(0.8~1.2 s)。这2个阶段的温升值都与压下量正相关,而与初轧温度反相关。在200℃下45%压下量轧制时两温升值分别达到80和35℃。在此基础上建立经验公式来预测温升。变形热引起的温升效应显著影响轧板的组织和再结晶行为。The temperature change history of AZ3lB Mg alloy was measured under different rolling conditions. An in situ measurement method through inlaid thermocouples was used. The results show the whole temperature variation process consist s of a deformation process（0.02~0.08 s） and a subsequent temperature homogenizing process（0.8~1.2 s）. The temperature rises in these two stages both increase with either increased reduction or decreased initial rolling temperature. Th ese two temperature rises reach 80 and 35 °C, respectively, with 45% rolling at 200 °C. On this basis, two empirical formulas were established to predict temperature rises. The deformation induced temperature rise significantly affect s the microstructure and recrystallization behavior of the rolled sheet.

关 键 词：镁合金 变形热 轧制 温升 微观组织 

分 类 号：TG339[金属学及工艺—金属压力加工]