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新日铁开发新型工字梁热轧技术新日铁已开发出一种轧制工字梁的灵活性热轧技术，在轧制不同尺寸的工字梁时不用更换轧辊。新日铁说，该自由轧制系统能将新产品研制周期由目前的４５天缩短至１０～１５天，还可以减少钢厂和销售市场中的产品库存数量。新开发的轧制系统目前...
Nippon Steel to develop new I-beam hot rolling technology Nippon Steel has developed a flexible rolling I-beam hot-rolling technology, the rolling of beams of different sizes do not have to replace the roll. Nippon Steel said the free-rolling system will shorten the life cycle of new products from the current 45 days to 10 to 15 days and will also reduce the number of product inventories in steel mills and sales markets. Newly developed rolling system currently ...