摘要
在Gleeble-3500热/力模拟试验机上,采用双道次压缩试验研究了0.15C-0.14Si-0.2Mn-0.04Nb钢在高温压缩变形后的静态软化行为,分析了道次停留时间、变形温度、应变速率以及应变量对静态再结晶行为的影响。并通过2%应力补偿法结合流变应力曲线计算出了静态再结晶软化率。研究表明,在其他条件不变的情况下,再结晶软化率随着道次停留时间的延长、变形温度的升高、应变速率的增大以及变形量的增大而增大。还建立了试验钢的静态再结晶动力学模型,获得静态再结晶激活能为188.986 k J/mol。
Using a Gleeble-3500 thermo-mechanical simulator, static recrystallization （SRX） behavior of 0.15C-0.14Si-0.2Mn-0.04Nb steel was investigated by double-pass compression tests. Effect of inter-pass time, deformation temperature, strain rate and deformation degree on the static recrystallization behavior was analyzed. The softening fraction of static recrystallization was determined using the 2% stress offset method combined with the flow stress curve. The results indicated that SRX occurred more easily under longer inter-pass time, higher deformation temperature, strain rate and deformation degree. The static recrystallization kinetic model was also established and the activation energy for static recrystallization was determined to be 188. 986 kJ/mol.
出处
《上海金属》
CAS
北大核心
2017年第1期7-10,共4页
Shanghai Metals
基金
国家重点基础研究发展计划项目(973)项目(No.2010CB-630802)
国家自然科学基金项目(No.50934011和No.50971137)资助
关键词
含Nb微合金钢
静态再结晶
动力学模型
激活能
Nb-microalloyed steel, static recrystallization, kinetic model, activation energy
