薄带连铸耐大气腐蚀钢的工业化实践
|
摘要
对耐大气腐蚀钢进行了薄带连铸工业化实践。通过成分调整和工艺设计,在NBS产线上成功生产出合格的耐大气腐蚀钢产品。薄带连铸耐大气腐蚀钢工业化实践表明,产品室温组织表层为PF+P,中心为AF;经单机架在线热轧压下率达到26%后,产品带厚公差控制在±25μm以内的比例可达99.6%;产品板形凸度可以控制到︱C40︱<50μm,楔形可以控制到︱W40︱<30μm。产品力学性能优,屈服强度范围为(430±50)MPa,抗拉强度范围为(550±50)MPa,断裂延伸率范围为(27±5)%;耐腐蚀性能与目前商用耐大气腐蚀钢相当,相对腐蚀率达到43%。产品经用户使用证明,薄带连铸耐大气腐蚀钢可以满足集装箱板严格的质量和使用要求。
BaostripTMhas chosen a steel grade—weathering steel to industrialize practice.Through designing the composition and process,the qualified weathering steel products on NBS production line were successfully produced. The industrialized practice of BaostripTMshows: The surface microstructure of weathering steel products is PF + P,and the center is AF. After a single stand on-line hot rolling of 26% lower rate,the ratio of thickness tolerance controlled within ± 25μm is up to 99. 6%. The flatness convexity can be controlled to︱C40︱ < 50 μm,and the wedge can be controlled to︱W40︱ < 30 μm. The mechanical properties of the strip is superior. The yield strength range is 430 ± 50 MPa,the tensile strength range is 550 ± 50 MPa,and the elongation range is( 27 ± 5) %. The corrosion resistance is equivalent to the current commercial atmospheric corrosion-resistant steel,and the relative corrosion rate is 43%. After the product is used by users,the weathering steel produced by strip casting process can meet the strict quality and usage requirements of the container steel sheet.
BaostripTMhas chosen a steel grade—weathering steel to industrialize practice.Through designing the composition and process,the qualified weathering steel products on NBS production line were successfully produced. The industrialized practice of BaostripTMshows: The surface microstructure of weathering steel products is PF + P,and the center is AF. After a single stand on-line hot rolling of 26% lower rate,the ratio of thickness tolerance controlled within ± 25μm is up to 99. 6%. The flatness convexity can be controlled to︱C40︱ < 50 μm,and the wedge can be controlled to︱W40︱ < 30 μm. The mechanical properties of the strip is superior. The yield strength range is 430 ± 50 MPa,the tensile strength range is 550 ± 50 MPa,and the elongation range is( 27 ± 5) %. The corrosion resistance is equivalent to the current commercial atmospheric corrosion-resistant steel,and the relative corrosion rate is 43%. After the product is used by users,the weathering steel produced by strip casting process can meet the strict quality and usage requirements of the container steel sheet.
引文
[1]Naotsugu Yoshida,Osamu Umezawa,Kotobu Nagai.Influence of phosphorus on solidification structure in continuously cast0.1 mass%carbon steel[J].ISIJ International,2003,43(3):348-357.
[2]魏红,吴建春,于艳,等.薄带连铸含磷低碳钢的组织性能研究[J].材料导报,2009,23(3):77-79.
[3]Koichi Hirata,Osamu Umezawa,Kotobu Nagai.Microstructure of cast strip in 0.1 mass%C steels containing phosphorus[J].Materials Transactions,2002,43(3):305-310.
[4]Osamu Umezawa,Koichi Hirata,Kotobu Nagai.Influence of phosphorus micro-segregation on ferrite structure in cast strips of 0.1 mass%C steel[J].Materials Transactions,2003,44(7):1266-1270.
[5]LIU Zhongzhu,Yoshinao Kobayashi,Mamoru Kuwabara,et al.Interaction between phosphorus micro-segregation and sulfide precipitation in rapidly solidified steel-utilization of impurity elements in scrap steel[J].Materials Transactions,2007,48(12):3079-3087.
[6]LIU Zhongzhu,Yoshinao Kobayashi,Kotobu Nagai.Effect of phosphorus on sulfide precipitation in strip casting low carbon steel[J].Materials Transactions,2005,46(1):26-33.
[7]吴建春,于艳,王成全,等.薄带连铸耐大气腐蚀钢高温相变过程的原位观察[J].宝钢技术,2009(4):13-18.
[8]LI Na,LIU Zhenyu,QIU Yiqing,et al.Solidification structure of low carbon steel strip with different phosphorus contents produced by strip casting[J].Mater.Sci.Technol,2006,22(6):755-758.
[9]林兆森,李娜,邱以清,等.双辊铸轧高磷铜钢薄带的偏析行为及对力学性能的影响[J].稀有金属,2006,30(专辑):68-71.
[2]魏红,吴建春,于艳,等.薄带连铸含磷低碳钢的组织性能研究[J].材料导报,2009,23(3):77-79.
[3]Koichi Hirata,Osamu Umezawa,Kotobu Nagai.Microstructure of cast strip in 0.1 mass%C steels containing phosphorus[J].Materials Transactions,2002,43(3):305-310.
[4]Osamu Umezawa,Koichi Hirata,Kotobu Nagai.Influence of phosphorus micro-segregation on ferrite structure in cast strips of 0.1 mass%C steel[J].Materials Transactions,2003,44(7):1266-1270.
[5]LIU Zhongzhu,Yoshinao Kobayashi,Mamoru Kuwabara,et al.Interaction between phosphorus micro-segregation and sulfide precipitation in rapidly solidified steel-utilization of impurity elements in scrap steel[J].Materials Transactions,2007,48(12):3079-3087.
[6]LIU Zhongzhu,Yoshinao Kobayashi,Kotobu Nagai.Effect of phosphorus on sulfide precipitation in strip casting low carbon steel[J].Materials Transactions,2005,46(1):26-33.
[7]吴建春,于艳,王成全,等.薄带连铸耐大气腐蚀钢高温相变过程的原位观察[J].宝钢技术,2009(4):13-18.
[8]LI Na,LIU Zhenyu,QIU Yiqing,et al.Solidification structure of low carbon steel strip with different phosphorus contents produced by strip casting[J].Mater.Sci.Technol,2006,22(6):755-758.
[9]林兆森,李娜,邱以清,等.双辊铸轧高磷铜钢薄带的偏析行为及对力学性能的影响[J].稀有金属,2006,30(专辑):68-71.