| 新型Mn Cr齿轮钢的动态再结晶及晶粒细化 |
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| 引用本文： | 王秉新,王佳夫,刘相华,王国栋. 新型Mn Cr齿轮钢的动态再结晶及晶粒细化[J]. 钢铁研究学报, 2006, 18(5): 0-0 |
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| 作者姓名： | 王秉新 王佳夫 刘相华 王国栋 |
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| 作者单位： | 1. 东北大学轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004;辽宁石油化工大学机械工程学院,辽宁,抚顺,113001
2. 东北大学轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004 |
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| 摘 要： | 采用Gleeble 1500热模拟试验机研究了一种新型Mn-Cr齿轮钢在不同条件下的动态再结晶行为及晶粒尺寸的变化规律,确定了该Mn-Cr齿轮钢的再结晶激活能为378.6 kJ/mol,应力指数为7.08(相对于峰值应力)或6.2(相对于稳态流变应力).Z因子唯一地决定着稳态动态再结晶的晶粒尺寸,二者之间为幂指数关系.Z因子通过影响稳态流变应力,进而影响形变储存能来改变再结晶的晶粒尺寸.
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| 文章编号： | 1001-0963（2006）05-0038-05 |
| 收稿时间： | 1900-01-01; |
| 修稿时间： | 2004-03-01 |
Dynamic Recrystallization and Grain Refinement in a New Mn-Cr Gear Steel |
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| WANG Bing-xin,WANG Jia-fu,LIU Xiang-hua,WANG Guo-dong. Dynamic Recrystallization and Grain Refinement in a New Mn-Cr Gear Steel[J]. Journal of Iron and Steel Research, 2006, 18(5): 0-0 |
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| Authors: | WANG Bing-xin WANG Jia-fu LIU Xiang-hua WANG Guo-dong |
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| Affiliation: | 1. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China; 2. College of Mechanical Engineering, Liaoning University of Petroleum and Chemical Technology, Fushun 113001, Liaoning, China |
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| Abstract: | Dynamic recrystallization and austenite grain size after recrystallization under different deformation conditions for a new Mn-Cr gear steel were studied using a Gleeble 1500 thermomechanical test system. Activation energy and stress exponent were determined as 378. 6 kJ/mol and 7. 08 (Z against peak stress) or 6. 2 (Z against steady state flow stress) respectively by regression analysis. The recrystallized grain size of austenite dr is determined only by the deformation condition Z because Z affects steady state flow stress, and steady state flow stress in turn determines the stored energy. An exponential function is held between dr and Z. |
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| Keywords: | gear steel deformation condition dynamic recrystallization austenite grain size |
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