细晶高强IF钢静态软化行为的研究
Study on Static Softening Behavior of Fine-grain High-strength IF Steel
何玉林1, 夏兆春2
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作者单位：1.江苏财经职业技术学院 机电工程系, 江苏 淮安 223003; 2.江苏沙钢集团淮钢特钢有限公司 轧钢厂, 江苏 淮安223001
中文关键字：细晶高强汽车板； 双道次压缩； 静态软化； 再结晶
英文关键字：fine-grain high-strength IF steel; double-pass compression; static softening; recrystallization
中文摘要：以细晶高强IF钢为研究对象， 在MMS-300热力模拟试验机上， 利用双道次压缩实验， 研究了细晶高强IF钢的静态软化行为。结果表明，变形温度越高，保温时间越长，静态软化率越大，且晶粒尺寸越大；通过Z-hollomen参数，计算出在ε= 0.3、■ =1 s-1的条件下，细晶高强IF钢的静态再结晶激活能为186.73 kJ/mol，该钢易发生静态再结晶。
英文摘要：The static softening behavior of fine-grain high-strength IF steel was studied by double-pass compression test on MMS-300 thermal mechanical simulator. The results show that the static softening rate increases with the increase of deformation temperature and holding time, the size of grain is bigger too. Through Z-hollomen parameters, the static recrystallization softening rate is calculated, and the static recrystallization activation energy is 186.73 kJ/mol. It is indicated that the recrystallization behavior of fine-grain high-strength IF steel can happen easily.