| 屈服强度750 MPa低合金钢高强度集装箱用钢的开发 |
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| 引用本文： | 殷胜,朱红丹.屈服强度750 MPa低合金钢高强度集装箱用钢的开发[J].特殊钢,2019,40(1):16-18. |
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| 作者姓名： | 殷胜 朱红丹 |
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| 作者单位： | 1西北工业大学材料学院，西安710072；宝钢股份梅钢公司
2技术中心热轧产品研究所,
3制造管理部检测中心，南京210039 |
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| 摘 要： | 设计和开发了屈服强度750 MPa低合金高强度集装箱用钢(/%:0.06～0.09C,0.25～0.35Si,1.60～1.80Mn, ≤0.015P,≤0.003S,0.10～0.20Mo,0.05～0.06Nb,0.09～0.11Ti,≥0.0015Ca,≥0.015Alt)。试验钢的工艺流程为260 t BOF-LF-RH-230 mm板坯连铸-热轧成2～6 mm板。通过Nb-Ti复合微合金化和Ca处理,控制精轧结束温度840～880℃,层流冷却速度≥60℃/s,卷取520～580℃,热轧钢卷的冷却速度≤10℃/h等工艺措施,热轧带钢具有良好的表面质量,组织为细晶铁素体+Nb-Ti碳氮化物,力学性能为上屈服强度760～790 MPa,抗拉强度860～910 MPa,伸长率21%～25%,满足用户要求。
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| 关 键 词： | 屈服强度750MPa低合金高强度钢 集装箱用钢 表面质量 开发 |
| 收稿时间： | 2018-08-02 |
Development of Yield Strength 750 MPa HSLA Steel for Container |
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| Yin Sheng,Zhu Hongdan.Development of Yield Strength 750 MPa HSLA Steel for Container[J].Special Steel,2019,40(1):16-18. |
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| Authors: | Yin Sheng Zhu Hongdan |
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| Affiliation: | 1 School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072；
2 Hot-Rolled Products Institute, Technical Center,
3 Examination Center, Manufacturing Department, Meisteel Co, Baosteel, Nanjing 210039) |
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| Abstract: | The yield strength 750 MPa high strength low alloy (HSLA) steel for container (/% : 0.06 ~0.09C, 0.25 ~0.35Si, 1.60 ~1.80Mn, ≤0.015P, ≤0.003S, 0.10 ~0.20Mo, 0.05 ~0.06Nb, 0.09 ~0.llTi, ≥ 0.0015Ca, ≥0.015Alt) has been designed and developed. The process flowsheet for tested steel is 260 t BOF-LF-RH-230 mm slab casting-hot-rolling to 2 ~ 6 mm plate. With the process measures including Nb-Ti compound microalloying and Ca treatment, controlling finishing rolling temperature 840 -880 ℃, lamina flow cooling rate ≥ 60℃ /S, coiling at 520 -580℃ , and hot-rolled coil cooling rate ≤ 10 °C/h， the hot-rolled strip coil has better surface quality, its structure is fine grain ferrite + Nb-Ti carbonitride, and the mechanical properties of strip are upper yield strength 760 ?790 MPa, tensile strength 860 -910 MPa, and elongation 21% ~25% to meet the requirement of user. |
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