F18优质碳素钢板带状组织控制技术

BANDED STRUCTURE CONTROL TECHNIQUE FOR F18 HIGH-QUALITY CARBON STEEL PLATE

冲压用优质碳素F18钢钢板需要有良好的塑性、冲压成型性能,对带状组织要求严格。通过控制轧制和冷却试验,运用“带状密度”概念使带状组织的描述定量化,对中厚板轧机轧制钢板的带状组织控制技术进行了研究,找出了控制带状组织的加热制度和轧后临界冷却速度。经现场工业生产验证,按照轧制加热温度1 200℃、保温90 min,轧后冷却速度6.8-8.4℃/s工艺参数,有效地消除了F18钢板的带状组织。

Good plasticity and stamping and formability, strict demand for banded structure are needed for stamping high- quality F18 carbon steel plate. In controlled rolling and cooling test, using concept ＂banded structure density＂ to describe quantitatively the banded structure, it is researched the banded structure control technique for rolled steel plate with plate mill, found out the heating schedule and the critical cooling speed after rolling. With site industrial production confirmation, the banded structure in F18 steel plate is effectively eliminated with process parameters as following ： rolling heating temperature as 1 200 ℃, holding for 90 mi- nutes, cooling speed after rolling as 6.8 to 8.4 ℃/s.