热机轧制工艺下Ф8 mm规格630 MPa高强度盘条钢筋生产实践
Production Practice of Ф8 mm 630 MPa High-Strength Wire Rod Steel Bar under Hot Rolling Process

为适应国家节能环保要求及建筑用钢筋市场发展需求，结合宝武集团鄂城钢铁有限公司高线产线热机轧制技术改造以后的能力提升，根据开发HRB500E的技术经验，采用NbV复合钢坯和VN微合金化钢坯进行了Ф8 mm规格630 MPa高强度盘条钢筋的试制。对比分析两种成分下钢筋头部、中部、尾部的力学性能、金相组织，明确了VN微合金化工艺的可行性，并对以后的批量生产提出了优化建议。
In order to meet the national requirements for energy conservation and environmental protection, as well as the development needs of the steel bar market for construction, and in combination with the improved capacity of Baowu Group Echeng Iron and Steel Co., Ltd.’s high-speed production line after the transformation of thermal rolling technology, based on the technical experience of developing HRB500E, NbV composite steel billets and VN microalloyed steel billets were used for the trial production of 630 MPa high-strength wire rod steel bars with a diameter of 8 mm. By comparing and analyzing the mechanical properties and metallographic structures of the steel bar head, middle, and tail under two different components, the feasibility of VN microalloying process was clarified, and optimization suggestions were proposed for future mass production.