论文部分内容阅读
弯扭的钢材,不仅难以使用(有时根本不能使用),而且运输堆放亦多不便。故在有关标准技术条件中对交货钢材的弯扭度都有明确而严格的规定。热轧钢材终轧后的矫直整理,乃是轧钢生产中的重要工序之一。整理设备、场地和工作人员在整个车期的总面积和生产总人数中占有相当大的比重。由于生产不断增长,我公司中小型轧钢厂感到钢材整理场地日嫌窄小,而精整设备尤感不足。过去,对小型钢材(≤40mm 的方、圆钢及螺纹钢等)从未进行矫直整理,因此出厂成品有的弯扭度过大。对中型钢材(45～75mm 方、圆钢及6.5号、7.5号角钢等等)全部于终轧冷却后在压力机上进行矫直,但矫直机能力极为不定,钢材终轧冷却后要堆积多日,才能整理检验完毕。这大大阻碍了轧机生产率的提高。根据这种情况,在1958年全民炼钢运动中,通过“三结合”想出了“趁热打直”的办法,即钢材终轧后立即在热状态下进行矫直整理。
Curved steel, not only difficult to use (sometimes simply can not use), but also more inconvenient transport stacked. Therefore, the standard technical conditions in the delivery of steel bending and torsion have clear and strict rules. Hot-rolled steel finishing straightening finishing, but the rolling process is one of the important processes. Finishing equipment, venues and staff occupy a large proportion of the total area and total production of the entire vehicle period. Due to the continuous growth of production, the small and medium-sized steel mills in our company feel that the site for finishing steel is too small and the finishing equipment is especially inadequate. In the past, the small steel (≤ 40mm square, round bar and rebar, etc.) has never been straightening finishing, so the finished product has some bending torsion too large. Medium-sized steel (45 ~ 75mm square, round and 6.5, 7.5 angle, etc.) all in the final cooling after straightening on the press, but the straightener is extremely variable, the final cooling after the steel to be accumulated more Day, to finish the test. This has greatly hindered the increase of mill productivity. According to this situation, in the national steelmaking campaign of 1958, the idea of “strike hard while it was hot” was formulated through the “triple combination,” in which straightening and finishing were carried out under hot conditions immediately after the steel was rolled.