| 中锰钢ART工艺C、Mn元素配分的热力学研究 |
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| 引用本文： | 田亚强,蔡志新,徐海卫,张宏军,韩赟,狄国标,陈连生.中锰钢ART工艺C、Mn元素配分的热力学研究[J].金属热处理,2022,47(3):159-164. |
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| 作者姓名： | 田亚强 蔡志新 徐海卫 张宏军 韩赟 狄国标 陈连生 |
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| 作者单位： | 1.华北理工大学 冶金与能源学院 现代冶金技术教育部重点实验室, 河北 唐山 063210;2.首钢京唐钢铁联合有限责任公司 技术中心, 河北 唐山 063200 |
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| 基金项目： | 河北省高等学校科学技术研究项目(ZD2019064)；;辽宁省自然科学基金(2019-KF-25-01)； |
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| 摘 要： | 利用Thermo-Calc软件对0.1C-7.2Mn中锰钢奥氏体逆转变 (Austenite reverted transformation,ART)过程中C、Mn元素配分的热力学过程进行模拟,并根据结果进行了ART工艺的热处理试验。热力学计算和试验结果表明,当退火温度为640 ℃时,C、Mn在奥氏体中含量均高于680 ℃时的含量,在配分初始阶段,C在奥氏体中的质量分数迅速达到最高点0.87%,在由Mn元素控制界面移动的过程中,Mn在奥氏体中的质量分数接近10%;C原子配分控制的界面移动平均速率达2.5×10-4 m·s-1,主导的界面迁移占总迁移距离的46.9%;而由Mn元素配分控制的界面移动速率仅为2.5×10-12 m·s-1,迁移距离占总迁移距离的53.1%;当试样在640 ℃保温30 min时,残留奥氏体的体积分数达到36.5%,抗拉强度为1041 MPa,并且强塑积达到24.36 GPa·%。
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| 关 键 词： | 中锰钢 热力学计算 C和Mn元素配分 奥氏体逆转变(ART) 退火工艺 |
| 收稿时间： | 2021-10-30 |
Thermodynamics of C and Mn element partitioning during austenite reverted transformation in medium manganese steel |
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| Tian Yaqiang,Cai Zhixin,Xu Haiwei,Zhang Hongjun,Han Yun,Di Guobiao,Chen Liansheng.Thermodynamics of C and Mn element partitioning during austenite reverted transformation in medium manganese steel[J].Heat Treatment of Metals,2022,47(3):159-164. |
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| Authors: | Tian Yaqiang Cai Zhixin Xu Haiwei Zhang Hongjun Han Yun Di Guobiao Chen Liansheng |
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| Affiliation: | 1. Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China; 2. Technology Center, Shougang Jingtang United Iron & Steel Co., Ltd., Tangshan Hebei 063200, China |
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| Abstract: | Thermodynamic process of C and Mn elements partitioning in austenite reverted transformation(ART) process of 0.1C-7.2Mn medium manganese steel was simulated by Thermo-Calc software, and the heat treatment experiment of ART process was carried out according to the results. Thermodynamic calculation and experimental results show that when the annealing temperature is 640 ℃, the content of C and Mn in austenite is higher than that at 680 ℃. In the initial stage of partitioning, the mass fraction of C in austenite quickly reaches the highest point of 0.87%. In the process of interface movement controlled by Mn element, the mass fraction of Mn in austenite is close to 10%. The average rate of interface movement controlled by C partitioning is 2.5×10-4 m·s-1, the interface migration controlled by it accounts for 46.9% of the total migration distance. The interface movement rate controlled by Mn partitioning is only 2.5×10-12 m·s-1, the migration distance accounts for 53.1% of the total migration distance. When the specimen is kept at 640 ℃ for 30 min, the volume fraction of retained austenite reaches 36.5%, the tensile strength is 1041 MPa, and the product of strength and elongation reaches 24.36 GPa·%. |
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| Keywords: | medium manganese steel thermodynamic calculation C and Mn partitioning austenite reverted transformation(ART) annealing process |
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