采用单道次热模拟实验分析了各变形参数(初始晶粒尺寸、变形速率、变形温度和变形量)对碳锰钢动态再结晶的影响.结果表明,当初始晶粒越细小、变形温度越高、变形速率越小时,越易发生动态再结晶,同时在能够发生动态再结晶的条件下,变形量越大,动态再结晶越充分.得到了发生动态再结晶时的形变激活能Qdef、临界变形量模型、动态再结晶百分数模型及动态再结晶晶粒尺寸模型.计算得出ε0.5模型的平均误差为3.95%,模型预测值与实验数据计算值符合较好.
参考文献
| [1] | Laasraoui A;Jonas J J .prediction of Steel Flow Stresses at High Temperatures and Strain Rates[J].Metallurgical and Materials Transactions,1991,22A(07):1545. |
| [2] | Medina S F;Mancilla J E .Static Recrystallization Modeling of Hot Deformed Steels Containing Several Alloying Elements[J].ISIJ International,1996,36(08):1070. |
| [3] | Sellars C M .Modeling Microstructural Development During Hot Rolling[J].Materials Science and Technology,1990,6(11):1072. |
| [4] | Siciliano F Jr;Minami K;Maccagno T M et al.Mathematical Modeling of the Mean Flow Stress,Fractional Softening and Grain Size During the Hot Polling of C-Mn Steels[J].ISU International,1996,36(12):1500. |
| [5] | Suehiro M;Satio K;Tsukano Y et al.Computer Modelling of Microstructural Change and Strength of Low Carbon Steel in Hot Strip Rolling[J].Trans Iron Steel Inat Jpn,1987,27(06):439. |
| [6] | Sellars C M;Whiteman J A .Recrystallization and Grain Growth in Hot Rolling[J].Materials Science and Technology,1979,13(3-4):187. |
| [7] | Imao Tamuar .Some Fundamental Steps in Thermomechanical Processing of Steels[J].ISIJ International,1987,27(10):763. |
| [8] | 金蕾,徐有容.C-Mn钢热变形行为及其流变应力模型的研究[J].上海大学学报（自然科学版）,1999(02):123-127. |
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