王荣军,马立峰,蒋亚平,黄志权,刘光明,楚志兵,林金保,房大庆

• 1:太原科技大学重型机械教育部工程研究中心

摘要(Abstract)：

在变形温度250~450℃、变形速率0.005~5 s-1条件下对铸态AZ31B镁合金进行了圆柱体高温压缩实验,研究变形温度、变形速率以及变形程度对变形抗力的影响规律。利用周纪华变形抗力数学模型进行拟合求解,分析影响该模型拟合误差的主要变量并据此提出改进的适用于AZ31B镁合金的变形抗力数学模型。研究结果表明:随着变形程度的增大,AZ31B镁合金材料变形抗力呈先增大后减小直至平衡的变化规律。随着变形温度的降低和变形速率的增大,变形抗力呈增大趋势。周纪华变形抗力模型的拟合相关系数为0.90,模型的平均相对误差为16.3%。变形程度是影响周纪华变形抗力模型拟合精度的主要因素,据此提出的改进的周纪华变形抗力模型的拟合相关系数为0.96,平均相对误差为7.8%,具有较高的预测精度,能够准确地表征AZ31B镁合金变形抗力的变化规律。

关键词(KeyWords)： AZ31B镁合金;变形抗力;变形程度;拟合精度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1510131);; 山西省“青年三晋学者”;; 山西省重点研发计划(201603D121010);; 晋城市科技计划项目(20155010);; 江苏省“双创团队”领军人才项目资助

作者(Author): 王荣军,马立峰,蒋亚平,黄志权,刘光明,楚志兵,林金保,房大庆

DOI: 10.13289/j.issn.1009-6264.2017.02.027

参考文献(References)：

• [1]刘庆.镁合金塑性变形机理研究进展[J].金属学报,2010,46(11):1458-1472.LIU Qing.Research progress on plastic deformation mechanism of Mg alloys[J].Acta Metallurgica Sinica,2010,46(11):1458-1472.
• [2]张雪敏,曹福洋,岳红彦,等.TC11钛合金热变形本构方程的建立[J].稀有金属材料与工程,2013,42(5):937-941.ZHANG Xue-min,CAO Fu-xiang,YUE Hong-yan,et al.Establishment of constitutive equations of TC11 alloy during hot deformation[J].Rare Metal Materials and Engineering,2013,42(5):937-941.
• [3]丁云鹏,崔建忠,乐启炽,等.镁合金板材的生产历史与研究现状[J].精密成形工程,2014,6(6):7-21.DING Yun-peng,CUI Jian-zhong,LE Qi-chi,et al.Production history and present study status of magnesium alloy sheet[J].Journal of Netshape Forming Engineering,2014,6(6):7-21.
• [4]余琨,蔡志勇,薛新颖,等.半连续铸造AZ31B镁合金的热压缩变形行为[J].中国有色金属学报,2010,20(11):2075-2080.YU Kun,CAI Zhi-yong,XUE Xin-ying,et al.Hot-compressive deformation behavior of semi-continuous cast AZ31B magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(11):2075-2080.
• [5]Quan G Z,Shi Y,Wang Y X,et al.Constitutive modeling for the dynamic recrystallization evolution of AZ80 magnesium alloy based on stress-strain data[J].Materials Science and Engineering A,2011,528(28):8051-8059.
• [6]Sun J,Dai H,Zhang Y.Research on mathematical model of thermal deformation resistance of X80 pipeline steel[J].Materials&Design,2011,32(3):1612-1616.
• [7]Wang J S,Jiang Z Y,Tieu A K,et al.Adaptive calculation of deformation resistance model of online process control in tandem cold mill[J].Journal of Materials Processing Technology,2005,162(20):585-590.
• [8]苏娟华,周铁柱,任凤章,等.锻态工业纯钛热轧变形抗力热模拟试验[J].材料热处理学报,2015,36(5):205-210.SU Juan-hua,ZHOU Tie-zhu,REN Feng-zhang,et al.Thermal simulation experiment of hot rolling deformation resistance of forged commercial pure titanium[J].Transactions of Materials and Heat Treatment,2015,36(5):205-210.
• [9]Lin Y C,He M,Zhou M,et al.New constitutive model for hot deformation behaviors of Ni-based superalloy considering the effects of initialδphase[J].Journal of Materials Engineering&Performance,2015,24(9):3527-3538.
• [10]Lin Y C,Wen D X,Deng J,et al.Constitutive models for high-temperature flow behaviors of a Ni-based superalloy[J].Materials&Design,2014,59(9):115-123.
• [11]马立峰,贾伟涛,林金保,等.铸态AZ31B镁合金变温轧制本构数学模型的建立[J].稀有金属材料与工程,2016,45(2):339-345.MA Li-feng,JIA Wei-tao,LIN Jin-bao,et al.Establishment of a constitutive model of temperature-changed rolling process for As-cast AZ31B Magnesium Alloy[J].Rare Metal Materials and Engineering,2016,45(2):339-345.
• [12]陈程,尹海清,曲选辉,等.钼变形抗力的研究[J].稀有金属材料与工程,2007,36(7):1237-1240.CHEN Cheng,YIN Hai-qing,QU Xuan-hui,et al.Research on deformation resistance of molybdenum[J].Rare Metal Materials and Engineering,2007,36(7):1237-1240.

文章评论(Comment)：