摘要
提出一种油浴加热辅助温热渐进成形技术,利用相关装置,通过实验的方法研究了成形温度对AZ31B镁合金成形性能、微观组织及断口形貌的主要影响并分析了原因。结果表明,AZ31B镁合金板材的成形温度越高,其最大成形角度越大,当成形温度达到200℃时,发生部分再结晶,导致晶粒细化,达到250℃时已经完全再结晶,晶粒显著细化,最大成形角度达到60°。但是过高的成形温度将增加能量消耗并提高AZ31B镁合金的氧化程度,并不是最经济的选择。在当前实验条件下,250℃左右的油浴加热温度是AZ31B镁合金比较理想的成形温度,非基面滑移系基本开动并参与材料的塑性变形,使AZ31B镁合金板材的成形性能得到显著改善。
A warm incremental sheet forming assisted by oil bath heating technology was proposed.The main influences of forming temperature on formability,microstructure and fracture morphology of AZ31 B magnesium alloy were studied by the experimental method using related devices,and the reasons were analyzed.The results show that the higher the forming temperature of AZ31 B magnesium alloy sheet is,the larger the maximum forming angle is.When the forming temperature reaches 200℃,the recrystallization partially occurs and leads to grain refinement.When the forming temperature reaches 250℃,a fully recrystallization occurs,the grain is significantly refined,and the maximum forming angle reaches 60°.While too high forming temperature increases the energy consumption as well as the oxidation degree of AZ31 B magnesium alloy,and it is not the cost-optimal option.At the current experimental conditions,the oil bath heating temperature of about 250℃is the relatively ideal forming temperature of AZ31 B magnesium alloy.The non-base slip systems are activated basically and participate in the plastic deformation of the material,which improves the formability of AZ31 B magnesium alloy sheet.
作者
张三
唐桂华
沈建冬
李朕
江祥奎
ZHANG San;TANG Gui-hua;SHEN Jian-dong;LI Zhen;JIANG Xiang-kui(School of Automation,Xi’an University of Posts&Telecommunications,Xi’an 710121,China;National Demonstration Center for Experimental Information&Control Engineering Education,Xi’an University of Technology,Xi'an 710048,China;MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第3期84-91,共8页
Journal of Plasticity Engineering
基金
陕西省重点研发计划资助项目(2019GY-118)
台州市科技计划资助项目(1701gy27)
热流科学与工程教育部重点实验室资助项目(KLTFSE2018KF03)
信息与控制工程国家级实验教学示范中心(西安理工大学)资助项目(2019ICYB11)
西安邮电大学教学改革研究专项资助项目(JGZ201816)。
关键词
AZ31B镁合金
温热渐进成形
油浴加热
成形温度
微观组织
断口形貌
AZ31B magnesium alloy
warm incremental sheet forming
oil bath heating
forming temperature
microstructure
fracture morphology
