| 中锰钢中原奥氏体晶粒尺寸对马氏体相变的影响 |
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| 引用本文： | 杜鹏举,吴迪. 中锰钢中原奥氏体晶粒尺寸对马氏体相变的影响[J]. 金属热处理, 2021, 46(9): 21-27. DOI: 10.13251/j.issn.0254-6051.2021.09.004 |
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| 作者姓名： | 杜鹏举 吴迪 |
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| 作者单位： | 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 110819;江阴兴澄特种钢铁有限公司, 江苏 江阴 214400;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 110819 |
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| 基金项目： | 中央高校基本科研业务费(N170706003) |
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| 摘 要： | 对中锰钢中原奥氏体晶粒尺寸对马氏体相变动力学的影响进行了分析.利用SEM、XRD、热膨胀相变仪和EBSD等检测手段,研究了不同原奥氏体晶粒尺寸下马氏体相变速率和马氏体板条组织的变化.通过不同温度的奥氏体化处理,分别得到了尺寸为(190±15)、(36±2)、(11±2)和(4.8±2)μm的原奥氏体晶粒.结果表明:随着...
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| 关 键 词： | 中锰钢 热处理 原奥氏体晶粒尺寸 马氏体相变 |
| 收稿时间： | 2021-03-12 |
Effect of prior austenite grain size on martensitic transformation in medium manganese steel |
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| Du Pengju,Wu Di. Effect of prior austenite grain size on martensitic transformation in medium manganese steel[J]. Heat Treatment of Metals, 2021, 46(9): 21-27. DOI: 10.13251/j.issn.0254-6051.2021.09.004 |
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| Authors: | Du Pengju Wu Di |
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| Affiliation: | 1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang Liaoning 110819, China;2. Jiangyin Xingcheng Special Steel Works Co., Ltd., Jiangyin Jiangsu 214400, China |
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| Abstract: | Effect of prior austenite grain size in medium manganese steel on kinetics of martensitic transformation was studied. The kinetics of martensitic transformation and microstructure evolution were analyzed by combining with SEM, XRD, thermal dilatometer and EBSD results. Different prior austenite grain sizes with (190±15), (36±2), (11±2) and (4.8±2) μm were achieved, respectively, by heating at different austenitizing temperatures. The results show that with the decreasing of prior austenite grain size, the martensite start temperature decrease from 289 ℃ to 250 ℃, while the kinetic of martensitic transformation increase at first then decrease. The kinetics of martensitic transformation is closely related to the number of martensite nucleation cites per unit volume, while the number of martensite nucleation cites are closed to the prior austenite grain size and the martensite lath aspect ratio. When the size of prior austenite grain decreases to 5 μm, the aspect ratio of martensite lath increases, while the increase rate of martensite nucleation cites with undercooling significantly reduces, which results in the decrease of the rate of martensite transformation. |
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| Keywords: | medium manganese steel heat treatment prior austenite grain size martensitic transformation |
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