于永梅,彭加利,胡亮明,张小玲,李长生,王国栋

• 1:沈阳化工大学机械工程学院
• 2:东北大学轧制技术及连轧自动化国家重点实验室

摘要(Abstract)：

通过在热力模拟试验机上采用不同工艺参数的单道次压缩和等温喷水淬火实验,研究了初始晶粒尺寸和奥氏体含量对Fe-3%Si钢应力-应变曲线和软化量的影响。结果表明:从800℃到1200℃,初始奥氏体含量随着等温温度的提高而增加,平均奥氏体含量由约4%增到约13%,其分布状态由弥颗粒状散趋向聚集粗化成棒状;在1200℃等温1~5 min,单相硅钢平均晶粒尺寸长大速率为144μm/min,而双相硅钢平均长大速率为68μm/min。在加工硬化阶段,奥氏体含量和初始晶粒尺寸对真应力-真应变曲线影响较小,当加工硬化和动态软化达到平衡时,随着奥氏体含量和晶粒尺寸的增加应力值降低。单道次压缩+等温淬火实验表明,初始晶粒越小,奥氏体粒子含量越高,硅钢再结晶软化率提高越快,再结晶分数越高。

关键词(KeyWords)： 硅钢;铁素体;应力;应变;奥氏体;再结晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1260204;51404155)

作者(Author): 于永梅,彭加利,胡亮明,张小玲,李长生,王国栋

DOI: 10.13289/j.issn.1009-6264.2016.05.011

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