低硅高钼型H13钢热变形行为  

Research on Thermal Deformation Behavior of Low Silicon High Molybdenum H13 Steel

作　　者：李晓 Li Xiao

机构地区：[1]中国第一重型机械股份公司,黑龙江富拉尔基161042

出　　处：《一重技术》2022年第4期50-56,共7页CFHI Technology

基　　金：黑龙江省“百千万”工程科技重大专项(No.2019ZX10A02);国家重点研发计划(No.2018YFA0702905);黑龙江省“头雁”团队。

摘　　要：采用Gleeble-3500热模拟试验机研究低硅高钼型H13钢在变形温度950~1200℃、应变速率0.01~10 s^(-1),变形程度60%条件下的热变形行为。通过高温压缩试验绘制流变应力曲线,根据实验数据计算热变形激活能,建立本构方程,并基于动态材料模型建立起热加工图。结果表明,该钢的动态再结晶激活能Q=527.91 kJ/mol,获得均匀、细小再结晶晶粒的加工工艺区间为1080~1200℃,0.001~0.1s^(-1)。This paper studies the thermal deformation behavior of the low silicon high molybdenum H13 steel under the thermal deformation temperature of 950~1200℃,strain rate of 0.01~10 s^(-1) and deformation rate of 60% with the Gleeble-3500 thermal simulation testing machine.Flow stress curve is drawn through high temperature compression test,and the thermal deformation activation energy is calculated on the basis of the test data,the constitutive equation is established,and the hot working diagram is established based on the dynamic material model.The results show that the dynamic recrystallization activation energy of the steel is Q=527.91 kJ/mol,and the processing range for obtaining uniform and fine recrystallization grains is 1080~1200℃,0.001~0.1 s^(-1).

关 键 词：模具钢 流变应力 热变形方程 热加工图 

分 类 号：TG142.1[一般工业技术—材料科学与工程]