摘要
用MMS-200热模拟实验机对2507超级双相不锈钢(/%:0.022C、0.58Si、25.35Cr、7.17Ni、4.05Mo、0.28N)12 mm热轧板在1 000～1150℃、应变速率0.01～10s^(-1)下进行了热压缩实验。实验结果表明,在应变速率一定的条件下,变形温度越高,2507超级双相不锈钢峰值应力越低;在变形温度一定的条件下,峰值应力随着应变速率的增加而增加。根据热变形方程计算得到压缩变形时的平均表观应力指数n=3.25,热变形激活能Q=460kJ/mol。基于实验数据构建了2507超级双相不锈钢在相应变形条件下的热变形方程。
The hot compression test of 12 mm hot rolled sheet of 2507 super duplex stainless steel（/%：0.022C, 0.58Si,25.35Cr,7.17Ni,4.05Mo,0.28N） with strain rate 0.01～10 s^（-6） at 1 000～1 150℃has been carried out by using MMS-200 thermal-mechanical simulator.Test results show that at definite strain rate,with increasing deformation temperature the peak stress of 2507 super duplex stainless steel decreases;and at definite deformation temperature,with increasing strain rate the peak stress increases.Based on the constitutive equation for hot deformation,the calculated hot compression average apparent stress exponent n =3.25,and hot deformation activation energy Q =460 kJ/mol.According to test dada a hot deformation equation for 2507 super duplex stainless steel at corresponding deformation condition is established.
出处
《特殊钢》
北大核心
2011年第6期50-52,共3页
Special Steel
基金
国家自然科学基金资助项目(50971039)
轧制技术及连轧自动化国家重点实验室(东北大学)自主研究课题资助
关键词
超级双相不锈钢
热变形
真应力-真应变
激活能
Super Duplex Stainless Steel
Hot Deformation
True Stress-True Strain
Activation Energy
