摘要
用Gleeble 3180热模拟试验机对022Cr钢的热变形行为进行研究,揭示了变形抗力与变形程度、变形温度和应变速率的关系。在950~1200℃温度范围和应变速率为0.001~5 s^-1下进行热压缩,并利用动态材料模型(DMM)建立了022Cr钢热变形的工艺图。结果表明,随着变形温度的升高和应变速率的降低,022Cr钢的流动应力降低。根据流动应力曲线数据计算其变形激活能为381.615 kJ/mol。当应变不小于0.5时,022Cr钢热加工的最佳变形条件有两个区域,第一个区域在温度范围1100~1200℃,应变速率范围0.001~0.01 s^-1内,第二个区域在温度范围1130~1180℃,应变速率范围1~5 s^-1内,其功耗效率都能达到0.4以上。
Hot deformation behavior of the 022Cr steel was studied by a Gleeble 3180 thermal simulation test machine,and the relationship between deformation resistance and deformation degree,deformation temperature and strain rate was revealed.The thermal compression was performed at temperature in range of 950-1200℃and at strain rate in range of 0.001-5 s^-1,and a dynamic deformation model of the 022Cr steel was established by using a dynamic material model(DMM).The results show that as the deformation temperature increases and the strain rate decreases,the flow stress of the 022Cr steel decreases.The deformation activation energy calculated from the data of the flow stress curve is 381.615 kJ/mol.When the strain is not less than 0.5,the optimal deformation conditions of the 022Cr steel for hot working have two regions.The first region is in the temperature range of 1100-1200℃,the strain rate is in the range of 0.001-0.01 s^-1,and the second region is in the temperature range of 1130-1180℃,strain rate range of 1-5 s^-1,its power consumption efficiency can reach more than 0.4.
作者
李荣斌
陈永强
蒋春霞
张如林
尚海龙
Li Rongbin;Chen Yongqiang;Jiang Chunxia;Zhang Rulin;Shang Hailong(School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Materials Science and Engineering,Shanghai Dianji University,Shanghai 201306,China;Shanghai Engineering Research Center of Large Piece Hot Manufacturing,Shanghai Dianji University,Shanghai 201306,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第7期51-56,共6页
Heat Treatment of Metals
基金
上海大件热制造工程技术研究中心(18DZ2253400)。
关键词
022Cr钢
热压缩
本构方程
热加工图
微观组织
022Cr steel
hot compression
constitutive equation
processing map
microstructure
