| 120 t BOF-LF-CC板坯-8 mm板流程Nb-Ti微合金化大梁钢750L的开发与实践 |
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| 引用本文： | 徐正彪,王延苹,刘启森,徐剑,林承江,秦哲. 120 t BOF-LF-CC板坯-8 mm板流程Nb-Ti微合金化大梁钢750L的开发与实践[J]. 特殊钢, 2021, 42(6): 43-46 |
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| 作者姓名： | 徐正彪 王延苹 刘启森 徐剑 林承江 秦哲 |
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| 作者单位： | 日照钢铁控股集团有限公司1 钢铁研究发展处；2 冶金技术处，日照276800 |
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| 摘 要： | 采用120 t BOF-LF-连铸-控轧控冷工艺流程，开发出8 mm高强度汽车大梁钢750L（Rm≥750 MPa）。结果表明，通过750L钢Nb-Ti复合微合金化（/%:0.074C，0.11Si，1.51Mn, 0.020P，0.002S，0.042Als，0.033Nb，0.109Ti），结合控轧控冷技术（精轧区压下量≥40%），生产的750L钢带的抗拉强度782～810 MPa，伸长率≥17.5%，晶粒度11.5～12.5级，冲击功≥90 J，各项技术指标满足并优于标准的要求。
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| 收稿时间： | 2021-04-01 |
Development and Practice of Nb-Ti Microalloying 750L Beam Steel by 120 t BOF-LF-CC Slab-8 mm Plate Flowsheet |
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| Xu Zhengbiao,Wang Yanping,Liu Qisen,Xu Jian,Lin Chengjiang,Qin Zhe. Development and Practice of Nb-Ti Microalloying 750L Beam Steel by 120 t BOF-LF-CC Slab-8 mm Plate Flowsheet[J]. Special Steel, 2021, 42(6): 43-46 |
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| Authors: | Xu Zhengbiao Wang Yanping Liu Qisen Xu Jian Lin Chengjiang Qin Zhe |
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| Affiliation: | 1 Iron and Steel Research and Development Department;2 Metallurgical Technology Department, Rizhao Steel Holding Group Co Ltd, Rizhao 276800 |
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| Abstract: | By 120 t converter-LF refining-continuous casting-controlled rolling and cooling process,the 750L (Rm≥ 750 MPa)beam steel of 8 mm high strength automobile is succes fully developed. The results show that through 750L steel Nb-Ti composite microalloying(/%:0.074C,0. 11Si,1.51Mn,0.020P,0.002S,0.042Als,0.033Nb,0. 109Ti), combined with control rolling and cooling(finish rolling reduction≥40%),that of produced 750L steel strip, the tensile strength 782～810 MPa, elongation≥17.5%, grain size11.5～12.5 rating and impact energy ≥90 J, all technical indexes satisfy the requirements of standard. |
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