| 45CrMoV钢奥氏体化空冷的显微组织分析 |
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| 引用本文： | 臧鑫士,李永斌.45CrMoV钢奥氏体化空冷的显微组织分析[J].北京航空航天大学学报,1993(3):26-31. |
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| 作者姓名： | 臧鑫士 李永斌 |
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| 作者单位： | 北京航空航天大学材料科学与工程系
(臧鑫士)，北京航空航天大学材料科学与工程系(李永斌) |
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| 摘 要： | 利用透射电镜和选区电子衍射研究了45CrMoV钢奥氏体化后空冷及其在不同温度回火的显微组织。结果表明,该钢奥氏体化后空冷得到以下贝氏体为主的混合组织。下贝氏体内的碳化物为ε碳化物和合金渗碳体M_3C,M_3C与基本的晶体取向关系符合Bagaryatskii关系。回火过程中钢的硬度下降和升高分别与ε碳化物的溶解和富钒碳化物M_4C_3的弥散析出有关。
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| 关 键 词： | 奥氏体 贝氏体 碳化物 耐热钢 |
MICROSTRUCTURAL ANALYSIS OF 45CrMoV STEEL AFTER AUSTENIZING FOLLOWED BY AIR COOLING |
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| Zang Xinshi Li Yongbin.MICROSTRUCTURAL ANALYSIS OF 45CrMoV STEEL AFTER AUSTENIZING FOLLOWED BY AIR COOLING[J].Journal of Beijing University of Aeronautics and Astronautics,1993(3):26-31. |
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| Authors: | Zang Xinshi Li Yongbin |
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| Institution: | Dept. of Materials Science and Engineering |
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| Abstract: | The microstructure of 45CrMoV steel after austenizing followed by air cooling and tempering at various temperatures have been studied, using TEM and SAD. The results show that air cooling from austenizing temperature produces a mixture of large lower bainite and small amounts of other structures. The carbides within lower bainite are e carbide and alloy cementite M3C. The crystallographic orientation relationship between M3C and matrix is in accordance with Bagaryatskii relationship. Decrease and increase in hardness of this steel during tempering depends on solution of e carbide and precipitation of rich-vanadium carbide M4C3 respectively. |
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| Keywords: | austenizing bainite carbide secondary hardening |
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