至今,H型钢一直使用万能轧机进行轧制,但生产不同规格H型钢时,必须换辊。另外,由于形状复杂,断面各部位在轧制中和轧制后的温度变化差异使其产生内部应力,致使腹板产生波纹,使可生产的厚度受到限制。为解决这些问题,日本新日本钢铁公司和日本钢管公司研究成功了一种高效率生产多种规格H型钢的轧制技术——H型钢的高效率自由成形技术。 Hitherto, H-beam has been rolling using a universal mill, but the production of different specifications H-beam, you must change the roll. In addition, due to the complex shape, the cross-section of the various parts of the rolling and rolling temperature changes to produce internal stress, resulting in corrugated web, so that the available thickness is limited. In order to solve these problems, Nippon Steel Corporation of Japan and Nippon Steel Pipe Co., Ltd. have successfully researched the high-efficiency free-form forming technology of H-shaped steel, which is a rolling technology for efficiently producing various types of H-shaped steels.