| 回火温度对1500MPa级直接淬火钢组织与性能的影响 |
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| 引用本文： | 王立军,蔡庆伍,武会宾,余伟.回火温度对1500MPa级直接淬火钢组织与性能的影响[J].北京科技大学学报,2010,32(9). |
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| 作者姓名： | 王立军 蔡庆伍 武会宾 余伟 |
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| 作者单位： | 北京科技大学高效轧制国家工程研究中心,北京,100083 |
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| 基金项目： | "十一五"国家科技支撑计划资助项目 |
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| 摘 要： | 设计了一种新型1500MPa级Si-Mn-Cr-Ni-Mo多组元系低合金、超高强度工程结构钢,研究了回火温度对直接淬火钢组织与力学性能的影响.结果表明,抗拉强度随回火温度的升高而不断降低,屈服强度随回火温度升高先升高后下降,延伸率和冲击功均随回火温度升高呈现先升高、后降低、再升高的变化趋势.分析认为,回火过程组织演变的物理机制一方面包括板条马氏体和位错亚结构的回复、再结晶软化过程,另一方面包括残余奥氏体的分解与马氏体中过饱和碳的脱溶及析出第2相的强化机制综合作用.250℃回火后,板条马氏体内析出ε碳化物;400℃回火后ε碳化物明显粗化,产生回火脆性;600℃回火后部分析出相在奥氏体中形核,在马氏体基体内长大和粗化,最终形态为近似球形,另一部分析出相在马氏体内形核、生长,呈现椭球形或矩形.
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| 关 键 词： | 高强钢 回火 马氏体 析出 力学性能 |
Effects of tempering temperature on the microstructure and mechanical properties of 1500 MPa grade steel directly quenched |
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| WANG Li-jun,CAI Qing-wu,WU Hui-bin,YU Wei.Effects of tempering temperature on the microstructure and mechanical properties of 1500 MPa grade steel directly quenched[J].Journal of University of Science and Technology Beijing,2010,32(9). |
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| Authors: | WANG Li-jun CAI Qing-wu WU Hui-bin YU Wei |
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| Institution: | WANG Li-jun,CAI Qing-wu,WU Hui-bin,YU Wei National Engineering Research Center for Advanced Rolling Technology,University of Science , Technology Beijing,Beijing 100083,China |
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| Abstract: | A novel type of 1 500 MPa grade Si-Mn-Cr-Ni-Mo multi-component ultrahigh-strength low-alloy structural steel was designed.The effects of tempering temperature on the microstructure and mechanical properties of the directly-quenched steel were investigated.The results showed that with increasing tempering temperature the tensile strength continuously reduced while the yield strength gradually increased and then decreased.The elongation and impact energy firstly increased,then decreased and increased again wi... |
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| Keywords: | high strength steel tempering martensite precipitation mechanical properties |
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