ER50-6焊丝钢热轧盘条的开发生产实践

摘要

Using the existing process equipments, after deep decarburization with a finish oxygen blowing in converter, the composition are controlled C 0.03%-0.04%, P ≤ 0.020% in tapping. The gas and inclusion in steel were removed in the LF refining and full procedure protection was taken in casting. The electromagnetic stirring technology was applied in the caster end to reduce the inclusions and to improve the quality of continuous casting slab. The pass design were optimized and the rolling temperature, spinning temperature, cooling speed were controlled to improve the product microstructure, mechanical properties and dimensional accuracy. ER50-6 wire steel hot rolled wire rods was developed in Zhanggang, the product microstructure is ferrite and pearlite, ferrite volume fraction is more than 80%, tensile strength is less than 560 MPa. The performance of all welding rod is stability, the rod has good surface quality. It can fully meet the requirements of custom.%利用现有工艺装备，转炉高拉补吹，出钢C 0.03%～0.04%，P≤0.020%；LF精炼减少钢中气体和夹杂；连铸全程保护浇注，降低钢中夹杂物，并采用末端电磁搅拌技术提高连铸坯质量；优化孔型设计，控制轧制温度、吐丝温度、冷却速度等控制产品的组织性能及尺寸精度。张钢开发生产了ER50-6焊丝钢热轧盘条，产品组织为铁素体和少量珠光体，铁素体体积分数在80%以上，抗拉强度在560 MPa以下，性能通条稳定性好，表面质量好，完全满足用户要求。