| 直接淬火800 MPa低合金高强度钢板的开发 |
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| 引用本文： | 王世森,余宏伟,张云燕,李德发,熊涛. 直接淬火800 MPa低合金高强度钢板的开发[J]. 特殊钢, 2013, 34(4): 53-55 |
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| 作者姓名： | 王世森 余宏伟 张云燕 李德发 熊涛 |
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| 作者单位： | 1武汉钢铁集团研究院，武汉4300802武汉钢铁集团鄂城钢铁有限责任公司技术中心，鄂州436002 |
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| 摘 要： | 开发的20 mm低成本铌钛硼微合金化低碳钢板(/%:0.06C、0.40Si、1.60Mn、0.010P、0.005S、0.050Nb、0.012Ti、0.002B)的生产流程为130 t顶底复吹转炉-LF-RH-250 mm板坯连铸-4300轧机轧制-直接淬火-回火工艺。通过终轧≥900℃,以≥20℃/s冷却速度直接淬火,500℃回火,20 mm钢板抗拉强度Rm为855 MPa,屈服强度Rp 0.2771 MPa,延长率A 16%,0℃冲击功Akv2 217～238J, -40℃ Akv2 137～181J。该钢的回火组织为细小的贝氏体板条,宽度为0.5～1.0μm,并有较多弥散分布的30～90 nm Nb+Ti碳氮化物析出。
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| 关 键 词： | 800MPa低合金高强钢 铌-钛-硼微合金化 钢板 直接淬火 回火 贝氏体 |
| 收稿时间： | 2013-02-21 |
Development of Direct Quenching 800 MPa High Strength Low Alloy Steel Plate |
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| Wang Shisen , Yu Hongwei , Zhang Yunyan , Li Defa , Xiong Tao. Development of Direct Quenching 800 MPa High Strength Low Alloy Steel Plate[J]. Special Steel, 2013, 34(4): 53-55 |
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| Authors: | Wang Shisen Yu Hongwei Zhang Yunyan Li Defa Xiong Tao |
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| Affiliation: | 1 Research and Development Center, Wuhan Iron and Steel Group, Wuhan 430080;2 Technical Center, Echeng Iron and Steel Co Ltd, Wuhan Iron and Steel Group, Ezhou 436002 |
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| Abstract: | The production flow sheet for developed 20 mm low-cost niobium-titanium-boron microalloying low carbon steel plate (/% : 0. 06C, 0. 40Si, 1. 60Mn, 0. 010P, 0. 005S, 0. 050Nb, 0. 012Ti, 0. 002B) is 130 t top and bottom combined blown converter-LF-RH-250 mm slab casting-4300 mill rolling-direct quenching-tempering process. With end rolling ≥ 900 °C, >20 °C./s direct quenching and tempering at 500 ℃ the tensile strength Rm of the 20 mm steel plate is 855 MPa, yield strength Rp 0.2771 MPa, elongation A 16% impact energy AKV2 at 0 °C 217 〜238 J and impact energy 4KV2 at -40 °C 137 〜181 J. Tempered structure of the steel is fine bainite lath with width 0. 5 ~ 1. 0μm and there are lots of dispersed 30 ~90 nm Nb + Ti carbo-nitride precipitates. |
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| Keywords: | 800 MPa HSLA Steel Niobium-Titanium-Boron Microalloying Steel Plate Direct Quenching Tempering Bainite |
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