| 锰对中锰耐磨钢组织形态及相变的影响 |
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| 作者姓名： | 丛菁华 唐荻 武会宾 潘学福 车英建 |
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| 作者单位： | 北京科技大学冶金工程研究院,北京,100083;北京科技大学冶金工程研究院,北京,100083;北京科技大学冶金工程研究院,北京,100083;北京科技大学冶金工程研究院,北京,100083;北京科技大学冶金工程研究院,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划资助项目(2012AA03A508)中央高校基本科研业务费(FRF-UM-15-001) |
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| 摘 要： | 通过DIL805A热分析仪、扫描电子显微镜、电子背散射衍射、透射电子显微镜、力学分析等方法研究Mn对中锰耐磨钢组织形态、相变及力学性能的影响.随着Mn的质量分数以2%的增量从3%提高到9%,室温奥氏体含量逐渐增多,抗拉强度及硬度逐渐降低,抗拉强度和室温奥氏体体积分数都在5%到7%时变化明显,马氏体与奥氏体的位向关系发生改变,马氏体形态类型逐渐由亚结构以位错为主的板条状α马氏体变化为亚结构以位错、相变内孪晶和层错为主的束状细片α马氏体和细片状ε马氏体.
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| 关 键 词： | 耐磨钢 锰 形态 相变 力学性能 |
| 收稿时间： | 2014-10-03 |
Effects of Mn on the microstructure morphology and phase transformation of medium manganese wear resistant steel |
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| Affiliation: | Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The effects of Mn on the microstructure morphology,phase transformation and mechanical properties of medium manganese wear resistant steel were investigated by DIL805 A thermal analyzer,scanning electron microscopy,electron back-scattered diffraction,transmission electron microscopy and mechanical testing. When the mass fraction of Mn increases from 3% to 9% by a 2%increment,the volume fraction of austenite at room temperature gradually increases. The tensile strength and hardness decrease especially at the mass fraction of Mn from 5% to 7%. The orientation relationship between martensite and austenite varies. The morphology and type of martensite change from lath α martensite whose substructure is mainly dislocations to bunchy laminar α martensite and laminar ε martensite whose substructure is mainly dislocations,twins through phase transition and stacking faults. |
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