φ400mm×2/φ250mm×5小型轧钢车间连铸坯一火成材改造

Reforming of Once Heating Into Product for Continuous Casting Billet Used in 400mm×2/250mm×5 Small Section Rolling Plant

石横特钢厂对４００ｍｍ×２／２５０ｍｍ×５小型轧钢车间进行连铸坯一火成材改造。在２５０ｍｍ轧机前增设轧机，将轧制道次由１０～１２道提高到１７道，并用轴承轧机替代原胶布瓦轧机，成品轧机最高轧制速度由５．５ｍ／ｓ增至７．１ｍ／ｓ，从而满足了连铸坯一火成材的工艺要求，减少了围盘事故，提高了轧制稳定性，保证了终轧温度，１９９７年实现产量１０万ｔ。

The reforming of once heating into product of continuous casting billet is done in 400mm×2/250mm×5 small section plant of Shiheng special steel works.Because of fitting rolling mill before 250mm rolling mill,rolling pass increasing to 17 from 10～12 and taking bearing mill,the highest rolling speed of finished mill increasing to 7 1m/s from 5 5m/s,the process request of once heating into product is meeted.Thus,the failure of guide is decreased,finished rolling temperature of product is ensured and the stability of rolling is increased.The productivity is 0 1 million tons in 1997.