18号槽帮钢是制造中小型煤矿用刮板运输机的主要材料。这种钢材的断面形状复杂,不对称,不规则,厚度不约匀,两腿长短不等(如图1),是比较难轧制的大型钢材。过去国内制造煤机全靠从国外进口,自1964年我公司试制成功后,才填补了这项空白,满足了国内煤机制造业的需要。 No. 18 tank to help steel is the manufacture of small and medium coal scraper conveyor main material. The cross-sectional shape of the steel complex, asymmetric, irregular thickness is not uniform, ranging from two legs (Figure 1), is more difficult to roll large steel. In the past domestic coal-making machines rely entirely on imports from abroad, since 1964, my company successfully trial, only to fill this gap, to meet the needs of domestic coal machine manufacturing industry.