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发明公开
CN110172558A 一种高扩孔钢表面氧化铁皮缺陷的控制方法 有权

一种高扩孔钢表面氧化铁皮缺陷的控制方法
摘要：
本发明属于轧钢技术领域，公开了一种高扩孔钢表面氧化铁皮缺陷的控制方法，包括：板坯出炉温度应控制在1270～1290℃；热卷在酸洗前进行拉矫预破鳞除鳞，拉矫延伸率控制在0.6～1.0％，破鳞辊插入量应控制在8～20mm；其中，适用钢种为580MPa及以上级别的高扩孔钢，按照质量百分比，成分控制为，C：0.05～0.25％，Si：0.2～0.5％，Mn：0.5～2.3％，P≤0.05％，S≤0.01％，Nb：0.01～0.11％，Mo≥0.1％，Ti≥0.02％。本发明提供的控制方法能够白保证产品性能的前提下，有效控制氧化铁皮缺陷。
摘要（英）：

The invention belongs to the technical field of steel rolling and discloses a control method for iron oxide scale defects on the surface of high reaming steel. The control method includes the steps that a tapping temperature of a plate blank is controlled at 1270-1290 DEG C; a hot roll is subjected to tensioning correcting advanced scale breaking and scale removing before acid pickling, the tensioning correcting percentage of elongation is controlled at 0.6-1.0%, and the insert-in amount of a scale breaking roller should be controlled at 8-20 mm; an applicable steel type is the high reaming steel being 580 MPa or the above level; according to the mass percentage, components are controlled into 0.05-0.25% of C, 0.2-0.5% of Si, 0.5-2.3% of Mn, smaller than or equal to 0.05% of P, smaller than or equal to 0.01% of S, 0.01-0.11% of Nb, larger than or equal to 0.1% of Mo, and larger than or equal to 0.02% of Ti. The control method can effectively control the iron oxide scale defects on thepremise of guaranteeing the product performance.

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