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2014年5月,衡阳华菱钢管有限公司(简称华菱衡钢)成功开发出Φ765 mm×95 mm无缝钢管,这是华菱衡钢目前可热轧生产的最大直径无缝钢管。由于Φ765 mm×95 mm规格无缝钢管的外径和壁厚尺寸大,生产中轧辊容易因受力过大而出现断裂。为解决该问题,华菱衡钢将原最大孔型的辊缝设计较正常值增加30 mm,并尽量保证轧辊的强度,将轧辊工作段延长,以减缓钢管轧制变形。
In May 2014, Hengyang Valin Steel Pipe Co., Ltd. (hereinafter referred to as Valin Hengsteel) successfully developed the Φ765 mm × 95 mm seamless steel pipe, which is the largest diameter seamless steel pipe currently available for hot rolling of Valin Steel. As Φ765 mm × 95 mm size seamless steel pipe diameter and wall thickness of large, easy to produce in the production of roller due to excessive stress and fracture. In order to solve this problem, Hualing Hengyang Steel will increase the original design of the largest slotted roll gap by 30 mm from the normal value and try to ensure the strength of the roll. The work section of the roll will be extended to slow down the rolling deformation of the steel pipe.