| 工程机械用钢Q800D/E直接淬火工艺研究及应用 |
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| 引用本文： | 余伟,刘丽华,武会宾,霍松波,洪光涛. 工程机械用钢Q800D/E直接淬火工艺研究及应用[J]. 钢铁, 2011, 46(12): 62-66 |
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| 作者姓名： | 余伟 刘丽华 武会宾 霍松波 洪光涛 |
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| 作者单位： | 1. 北京科技大学冶金工程研究院， 北京 100083 2. 南京钢铁股份有限公司研发中心， 江苏 南京 210035 |
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| 摘 要： | 采用低碳Mn-Mo-Nb-Cr-Ni系的成分设计，并通过炉卷轧机高密层流冷却装置直接淬火工艺，配以合适的回火制度，生产了屈服强度高于800MPa，-40℃冲击功达到100J以上的高强工程机械用Q800D/E钢板。回火温度升高过程中，Q800D/E钢板中的析出物呈现先长大而后重新形核析出随后再粗化的过程，是其强度随回火温度升高呈现先下降后上升而后再下降的原因所在。
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| 关 键 词： | 高强钢 直接淬火 析出 力学性能 |
| 收稿时间： | 2010-09-29 |
Study and Application on Q800D/E Grade Construction Machinery Steel Produced by Direct Quenching Technique |
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| YU Wei,LIU Li-hua,WU Hui-bin,HUO Song-bo,HONG Guang-tao. Study and Application on Q800D/E Grade Construction Machinery Steel Produced by Direct Quenching Technique[J]. Iron & Steel, 2011, 46(12): 62-66 |
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| Authors: | YU Wei LIU Li-hua WU Hui-bin HUO Song-bo HONG Guang-tao |
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| Affiliation: | 1. Metallurgical Engineering Institute, University of Science and Technology Beijing, Beijing 100083, China 2. Research and Development Center, Nanjing Iron and Steel Company Ltd.， Nanjing 210035, Jiangsu, China |
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| Abstract: | Using high density laminar cooling device of steckel mill, low carbon Mn-Mo-Nb-Cr-Ni series Q800D/E grade construction machinery steel was produced by direct quenching and off-line tempering technique. The yield strength of the plate was more than 800MPa and the CVN impact energy at - 40℃ was more than 100J after appropriate tempering. During tempering temperature rising, the precipitates in Q800D/E exhibited growing, re-nucleating and coarsing process, which would lead to the fluctuation of the plate strength. |
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| Keywords: | high strength steel direct quenching precipitates mechanical property |
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