AG700L动态再结晶热变形本构方程的测算  

CALCULATION OF THERMAL DEFORMATION CONSTITUTIVE EQUATION FOR DYNAMIC RECRYSTALLIZATION OF AG700L

作　　者：杜海明[1] 李静宇[1] 张静[1] Du Haiming;Li Jingyu;Zhang Jing(Anyang Iron and Steel Group Co.,Ltd)

机构地区：[1]安阳钢铁集团有限责任公司

出　　处：《河南冶金》2023年第2期5-8,49,共5页Henan Metallurgy

摘　　要：利用Gleeble-3800热模拟试验机对AG700L试样进行单道次压缩变形试验,记录材料在不同变形温度(900℃、950℃、1000℃、1050℃、1100℃、1150℃)、不同的应变速率(0.01 s^(-1)、0.1 s^(-1)、1 s^(-1)、5 s^(-1))压缩变形70%时的真应力应变曲线。试验完成后对各工艺下的真应力应变曲线进行整理,同时结合奥氏体晶粒结果进行综合分析,摸清了变形温度、应变速率对汽车大梁钢AG700L的动态再结晶的影响规律,通过数据处理计算得到AG700L钢动态再结晶激活能为354.3646 kJ/mol,并建立了动态再结晶热变形本构方程。The Gleeble-3800 thermal simulation testing machine was used to conduct single pass compression defor-mation test on AG700L samples,record the true stress-strain curves of materials at different deformation temperatures(900℃、950℃、1000℃、1050℃、1100℃、1150℃)and compression deformation of 70%at different strain rates(0.01 s^(-1)、0.1 s^(-1)、1 s^(-1)、5 s^(-1)).After the completion of the test,the true stress-strain curves of each process were sorted out,and combined with the austenite grain size results,the influence law of deformation temperature and strain rate on the dynamic recrystal-lization of automobile beam steel AG700L was found out.The dynamic recrystallization activation energy of AG700L steel is 354.3646 KJ/mol by data processing,and the dynamic recrystallization thermal deformation constitutive equation was established.

关 键 词：AG700L 变形温度 奥氏体晶粒 真应力应变曲线 动态再结晶 

分 类 号：TG142.1[一般工业技术—材料科学与工程]