耐热钢热扭转变形行为研究  

Hot torsion deformation behavior of heat-resistant steel

作　　者：孟令威 孟令玺[2] MENG Lingwei;MENG Lingxi(Engineering Training Center,College of Humanities&Information,Changchun University of Technology,Changchun 130122,China;Department of Commerce and Trade,College of Humanities&Information,Changchun University of Technology,Changchun 130122,China)

机构地区：[1]长春工业大学人文信息学院工程训练中心,吉林长春130122 [2]长春工业大学人文信息学院商学院,吉林长春130122

出　　处：《兵器材料科学与工程》2020年第6期38-41,共4页Ordnance Material Science and Engineering

基　　金：吉林省高教科研课题(JGJX2020D551);吉林省教育科学“十三五”规划2020年度课题(GH200923);吉林省高等教育教学改革研究课题(重点课题)。

摘　　要：以EA4T奥氏体耐热钢为试验对象,分析其热扭转变形行为,用NWS500微机控制热扭转机,在温度为800~1200℃,应变率为0.01、0.1、1、10 s^-1时,进行热扭转变形。结果表明:应变一定时,应力-应变曲线出现峰值,且随应变率降低、温度升高而降低;应变率与应变一定时,提高温度,扭转热变形抗力下降,温度为1100~1200℃时,变形抗力小于250 MPa,此时奥氏体耐热钢加工性能最优。Taking EA4T austenitic heat-resistant steel as the test object,the hot torsion deformation behavior of EA4T austenitic heat-resistant steel was analyzed.The NWS500 microcomputer was used to control the hot torsion machine,and the hot torsion deformation was carried out at temperature from 800℃to 1200℃,the strain rate is 0.01,0.1,1,10 s-1.The results show that the peak value of stress-strain curve appears when the strain rate is fixed,and decreases with the decrease of strain rate and the increase of temperature.When the strain rate and strain are fixed,the resistance of torsional hot deformation decreases with the temperature increasing.When the temperature is from 1100℃to 1200℃,the resistance of deformation is less than 250 MPa,and the processing performance of austenitic heat-resistant steel is the best.

关 键 词：耐热钢 扭转 热变形 行为 力学 性能分析 

分 类 号：TG304[金属学及工艺—金属压力加工]