屈服强度700MPa级集装箱用钢研究及开发

来源 :第五届宝钢学术年会 | 被引量 : 0次 | 上传用户:luhy1123
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
根据700 MPa级别超高强集装箱用钢的特点和要求,通过合理的化学成分设计以及与之相适应的生产工艺制定,利用沉淀强化、细晶强化以及位错强化等方式实现屈服强度达到700 MPa级别。工业化试制采用以Nb,Ti微合金化为主,适当添加Cr元素的合金化思路以及控轧控冷技术,严格控制钢中P,S含量范围确保其高洁净度,控制TiN的析出尺寸以及终轧温度,卷取温度以及冷却速度等工艺参数,在莱钢1500 mm热轧生产线成功开发屈服强度700 MPa级超高强集装箱用钢.利用光学显微镜,扫描电镜,透射电镜,相分析手段等对该钢的组织形态和析出相形貌与分布进行了研究分析.结果表明,700 MPa级集装箱用钢的组织以多边形铁素体为主,同时存在少量贝氏体组织;晶粒尺寸控制在5μm以下,为超细晶组织.析出相以Nb,Ti的碳氮化物形式存在,尺寸40 nm以下的占37.5%;钢的力学性能控制较好,屈服强度700 MPa以上,延伸率达到20%;辊压成型后端部和中间部位没有出现开裂现象,冷成型性能良好.上述结果均满足制造高性能集装箱的要求。
其他文献
采用SEM+EDS试验分析了IF钢冶炼过程中不同阶段钢水夹杂物的形貌和类型,对比了水口絮瘤物与中间包钢水夹杂物的类型情况.研究结果表明:炉后大包钢水中夹杂物一般为球状或块状Mn-Fe-O复合夹杂物,RH铝脱氧后夹杂物演变成树枝状的Al2O3夹杂物,没有发现Mn-Fe-O复合夹杂物,钢水中加入钛铁后,夹杂物包括Al2O3系和Al2O3-TiO2系复合夹杂物,Al2O3系和Al2O3-TiO2系复合夹
The microstructures and the mechanical properties of the medium manganese steel experienced warm rolling and annealing are investigated.And the transformation of reverted austenite in the steel is inv
Using X-ray diffraction techniques,the recovery behavior characteristics occurred in rapid heating treatment of cold rolled steel sheet have been investigated.The results have indicated that rapid hea
The microstructure characteristics and formability of the edge of picked steel sheet are investigated based on the phenomenon that earing and cracking are often appear at these area during drawing.The
The drive toward improved automotive fuel efficiency and vehicle "light-weighting" continues unabated,and competition between steel and alternative materials remains intense in the research and engine
Quenching-Partitioning ( Q-P) and Quenching-Partitioning-Tempering ( Q-P-T) process have received extensive attention and demonstrated a huge potential of application.Several Q-P-T processes were succ
This paper deals with the effect of austenite reverted transformation ( ART) annealing time on microstructure and mechanical properties of low carbon medium manganese ( 0.2C - 7Mn) steel.It has been s
An ultra - fine bainitic steel was investigated in present study.The steel was heated t0 850℃ and austenized for 10 min followed by cooling t0 300℃ for isothermal different time for bainitic transform
随着校车安全问题的日益突出,提高校车安全性能的呼声越来越高.利用先进高强钢替代传统普碳钢,能够显著提高校车的防撞性能并降低车身重量,减少油耗.为响应社会和国家的需求,宝钢加紧了对提高校车安全性能的主要结构件一高强度方矩管的研制.以宝钢热轧板QStE700TM和冷轧板HC700/980 ms为研究材料,以60 ×60 ×3( mm)规格产品为研究对象,利用ABAQUS有限元软件、PROFIL冷弯轧辊
随着热轧工艺与控制技术的不断进步,薄规格(≤2 mm)热轧产品的表面质量(包括酸洗钢带)和尺寸精度越来越接近对应的冷板,并具有良好的板形和力学性能,在很多领域可以代替冷轧板,实现了“以热代冷”;随着薄规格热轧产品强度的提高,“以薄代厚”的理念在很多用钢领域得以实现.由于可以节约成本,薄规格热轧及其酸洗产品具有巨大的市场前景和经济效益.首先对薄规格热轧产品生产的关键技术问题加以论述,并阐述了薄规格热