| Nb微合金化对18CrNiMo7-6钢奥氏体晶粒长大的影响 |
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| 引用本文： | 王自敏,杨志强,胡芳忠,汪开忠,丁雷.Nb微合金化对18CrNiMo7-6钢奥氏体晶粒长大的影响[J].金属热处理,2021,46(9):53-57. |
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| 作者姓名： | 王自敏 杨志强 胡芳忠 汪开忠 丁雷 |
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| 作者单位： | 马鞍山钢铁股份有限公司 技术中心, 安徽 马鞍山 243000 |
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| 基金项目： | 工信部工业强基项目(招标编号:TC180A3Y1/分包号:14) |
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| 摘 要： | 对比研究了含Nb和不含Nb的18CrNiMo7-6试验钢在加热温度(900~1100 ℃)和保温时间(1~8 h)下的奥氏体晶粒长大行为,建立了两种试验钢的奥氏体晶粒长大的数学模型。结果表明,随着加热温度的升高和保温时间的延长,试验钢的奥氏体晶粒逐渐长大,相同加热条件下18CrNiMo7-6-Nb钢的奥氏体晶粒尺寸要小于18CrNiMo7-6钢。将试验钢的晶粒长大过程分为抑制长大阶段(900~1000 ℃)和自由长大阶段(1000~1100 ℃),分别建立了适用于含Nb和不含Nb的两种18CrNiMo7-6试验钢的晶粒长大数学模型。
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| 关 键 词： | Nb微合金化 18CrNiMo7-6钢 奥氏体晶粒长大 数学模型 |
| 收稿时间： | 2021-05-23 |
Effect of Nb microalloying on austenite grain growth of 18CrNiMo7-6 steel |
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| Wang Zimin,Yang Zhiqiang,Hu Fangzhong,Wang Kaizhong,Ding Lei.Effect of Nb microalloying on austenite grain growth of 18CrNiMo7-6 steel[J].Heat Treatment of Metals,2021,46(9):53-57. |
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| Authors: | Wang Zimin Yang Zhiqiang Hu Fangzhong Wang Kaizhong Ding Lei |
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| Affiliation: | Technology Center, Ma'anshan Iron and Steel Co., Ltd., Ma'anshan Anhui 243000, China |
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| Abstract: | Austenite grain growth behavior of the 18CrNiMo7-6 steels with Nb and without Nb heated at 900-1100 ℃ for 1-8 h was studied, and the mathematical models of the austenite grain growth of the two tested steels were established. The results show that with the increase of heating temperature and holding time, the austenite grain size of the tested steels increases gradually, and that of the 18CrNiMo7-6 steel with Nb is smaller than that without Nb under the same heating condition. By characterizing the grain growth process of the tested steels as inhibited growth stage (900-1000 ℃) and free growth stage (1000-1100 ℃), more suitable grain growth mathematical models are established respectively for the tested steels with Nb and without Nb. |
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| Keywords: | Nb microalloying 18CrNiMo7-6 steel austenite grain growth mathematical model |
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