Manufacturing process of high-carbon tool steel SK85 cold-rolled wide steel strip
一种制造工艺、工具钢的技术,应用在高碳工具钢SK85冷轧宽钢带的制造工艺领域,能够解决珠光体组织粗大、卷取温度高、冷却速度慢等问题,达到球状形核点增多、晶界面积增大、减少轧制道次的效果
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Embodiment 1
[0080] Embodiment 1: what this embodiment produces is that the high-carbon tool steel SK85 cold-rolled wide strip of high carbon tool steel SK85 that specification is thick * 1250mm is wide, and its production steps are as follows:
[0081] (1) Converter smelting: adopt 210t converter smelting;
[0082] (2) LF refining: LF refining is carried out after converter smelting, and the main chemical components of molten steel measured after refining are C: 0.85%, Si: 0.18%, Mn: 0.33%, P: 0.0:18% , S: 0.005%, Cr: 0.01%, Ni: 0.01%, Cu: 0.02%, and the rest are Fe and unavoidable impurity elements;
[0083] (3) Continuous casting: continuous casting after LF refining, the superheat of molten steel is 16°C, the casting speed is 1.08m / min, and a continuous casting slab with a thickness of 230mm and a width of 1260mm is obtained;
[0084] (4) Heating: To heat the continuous casting slab, a three-stage heating method is adopted. The temperature of the preheating section is 675°C, the tempe...
Embodiment 2
[0093] Embodiment 2: what the present embodiment produces is that the high carbon tool steel SK85 cold-rolled wide strip of high carbon tool steel SK85 that specification is thick * 1100mm is wide, and its production steps are as follows:
[0094] (1) Converter smelting: adopt 210t converter smelting;
[0095] (2) LF refining: LF refining is carried out after converter smelting, and the main chemical components of molten steel measured after refining are C: 0.86%, Si: 0.19%, Mn: 0.36%, P: 0.0:17% , S: 0.004%, Cr: 0.01%, Ni: 0.01%, Cu: 0.02%, and the rest are Fe and unavoidable impurity elements;
[0096] (3) Continuous casting: continuous casting after LF refining, the superheat of molten steel is 18°C, the casting speed is 1.04m / min, and a continuous casting slab with a thickness of 230mm and a width of 1120mm is obtained;
[0097] (4) Heating: Heating the continuous casting slab, adopting a three-stage heating method, controlling the temperature of the preheating section to...
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