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薄规格热轧宽带钢以热代冷的趋势正逐渐扩大,具有广阔的应用前景,但生产难度大。珠钢通过严格控制钢水成分、温度的波动变化范围,定期检测铸坯对中、楔形、镰刀弯、温度均匀性来促进连铸、加热炉工序工艺及设备精度的持续改进,解决铸坯楔形、镰刀弯、变形抗力不均等问题;通过优化加热炉炉膛气氛、改善炉辊运行状况,调整工作辊冷却,合理设计轧制计划,解决过早发生麻面质量缺陷问题;发明预调板带对中度的轧钢操作法,大幅降低卡钢、甩尾事故和浪形缺陷;通过设计花纹辊新花形、选用合适的轧辊材质及轧辊凸度,解决超薄花纹板生产难脱槽、易崩口和易中间浪的问题。最终实现了超薄规格热轧宽带钢大批量生产,h=1.0~1.35 mm普通碳素结构钢超薄规格热轧板比例达到30%,h=1.0~2.0 mm超薄规格热轧花纹板比例达到74%,h=1.0~1.8 mm超薄规格热轧花纹板比例达到28%。
Thin-gauge hot-rolled wide strip to the trend of cooling on behalf of the cold is gradually expanding, with broad application prospects, but the production of large difficulties. By strictly controlling the variation range of the composition and temperature of the molten steel, the Pearl Steel Company regularly checks the slab’s centering, wedge, sickle bend and temperature uniformity to promote the continuous improvement of the continuous casting process, the furnace process and equipment precision, Sickle bend, the deformation resistance is not equal to the problem; by optimizing the furnace hearth furnace to improve the status of the furnace roll, adjust the cooling of the work roll, the rational design of the rolling plan to solve the problem of premature pheasant quality defects; Degree of rolling operation method, a substantial reduction in card steel, tail drift accident and the wave-shaped defects; design by the new flower pattern roller, the choice of a suitable roll material and roll convexity to solve the thin plate production difficult to groove, easy to crack mouth and Easy middle wave of the problem. The final production of ultra-thin gauge hot rolled wide strip is mass-produced, h = 1.0 ~ 1.35 mm. The proportion of ordinary thin-gauge hot-rolled plate of carbon structural steel reaches 30% Reached 74%, h = 1.0 ~ 1.8 mm ultra-thin hot-plate proportion reached 28%.