ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2019, Vol. 40 ›› Issue (1): 16-18.

所属专题: 钢板

• 工艺技术 • 上一篇    下一篇

屈服强度750 MPa低合金钢高强度集装箱用钢的开发

殷胜1,2,朱红丹3   

  1. 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
  • 收稿日期:2018-08-02 出版日期:2019-02-01 发布日期:2022-05-23
  • 作者简介:殷胜(1980-),男,博士生(2015年西北工业大学),硕士(南京理工大学),高级工程师,南京理工大学(本科)毕业,汽车用钢研发。

Development of Yield Strength 750 MPa HSLA Steel for Container

Yin Sheng1,2 , Zhu Hongdan3   

  1. 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)
  • Received:2018-08-02 Published:2019-02-01 Online:2022-05-23

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。

关键词: 屈服强度750 MPa低合金高强度钢, 集装箱用钢, 表面质量, 开发

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.