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| 引用本文： | 周继锋,高聿为,荆天辅.?????????????????????±???????????????[J].物理测试,2010,28(2):1-1. |
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| 作者姓名： | 周继锋 高聿为 荆天辅 |
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| 作者单位： | ??????????豸??????????о???????? |
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| 基金项目： | 国家自然科学基金(钢铁联合基金50271060,50371074); 河北省自然科学基金(503291) |
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| 摘 要： | 本文利用温压缩实验，在Gleeble3500热力模拟试验机上测定了中碳钢马氏体（M）和铁素体＋珠光体（F+P）两种组织的流变曲线。对比研究了应变速率对这两种组织流变行为的影响。结果表明：在相同温度下，M组织的应变速率敏感性指数（mM）和加工软化率（s M）都大于F+P组织的相应参数（mF+P）和（s F+P）。应变速率为0.001s-1，变形温度为600℃，650℃，700℃，M组织的流变曲线均低于F+P组织的流变曲线；当应变速率从0.01s-1增加到10s-1，M组织和F+P组织的流变曲线相交，交点应变为临界应变，大于临界应变，M组织的流变应力低于F+P。这表明，对降低钢材温轧或零件温挤压的变形应力和成本来说，M组织可能比F+P更好。此外，对导致M组织上述流变行为的机理进行了初步探讨。
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| 关 键 词： | ??????? ?????? ?±??? ??????? |
| 收稿时间： | 2009-10-21; |
Effect of Strain Rate on Flow Stress of Martensite in a Medium Carbon Steel Subjected to Warm Deformation |
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| ZHOU Ji-feng,GAO Yu-wei,JING Tian-fu.Effect of Strain Rate on Flow Stress of Martensite in a Medium Carbon Steel Subjected to Warm Deformation[J].Physics Examination and Testing,2010,28(2):1-1. |
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| Authors: | ZHOU Ji-feng GAO Yu-wei JING Tian-fu |
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| Affiliation: | ZHOU Ji-feng1,2,GAO Yu-wei2,JING Tian-fu2(1.Special Equipment Safety Supervision Inspection of Jiangsu Province,Zhangjiagang 215600,Jiangsu,China,2.Key Laboratory of Metastable Materials Science , Technology,College of Materials Science , Engineering,Yanhan University,Qinhuangdao 066004,Hebei,China) |
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| Abstract: | Flow curves of warm deformation performed on martensite structure(M) and ferrite plus pearlite structure(F+P) in a medium carbon steel were determined on Gleeble-3500 machine.Comparison study was conducted on effect of strain rate on the warm low behavior of two starting microstructures of M and F+P at various temperatures.It is found that the strain rate sensitive index(mM) and working softening rate of sM of M are larger than that of F+P,(mF+P) and(s F+P).And the flow stress of M is lower than that of F+P... |
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| Keywords: | strain rate martensite warm deformation flow stress |
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