八钢H型钢“H-H”轧制法的研究及应用实践

Research and Application of“H-H”Rolling Method for H-section Steel in Bayi Iron

八钢小型H型钢厂采用H型钢“X-X”轧制法的工艺布置,此轧制法对万能轧机的装备精度要求较高,在万能轧机侧压辊系磨损严重又修复精度无法满足时会造成轧件腿部金属切偏,出现H型钢成品腹板偏心,影响用户的使用,且此缺陷的调整难度大,常规调整手段很难快速见效,只有更换维修过的轧机才能恢复产品质量。针对此问题研究热轧H型钢“H-H”轧制法,主要目的是降低H型钢轧制过程中对万能轧机的高精度要求,降低生产过程中轧机调整难度,稳定生产和产品质量。八钢公司小型H型钢厂在两年多的实际应用中不断的优化完善,形成了成熟的“H-H”轧制法,目前已实现工字钢和H型钢的生产应用全覆盖。

The process layout of H-beam“X-X”rolling method is adopted in the small H-beam mill of Bagang.This rolling method requires high equipment accuracy of the universal rolling mill.When the side pressure roll system of the universal rolling mill is seriously worn and the repair accuracy cannot be met,the metal at the leg of the rolled piece will be cut off,resulting in the eccentricity of the finished H-beam web,which affects the use of users.Moreover,the adjustment of this defect is difficult,and the conventional adjustment methods are difficult to achieve quick results,Only by replacing the repaired mill can the product quality be restored.In view of this problem,the“H-H”rolling method for hot rolled H-beam is studied.The main purpose is to reduce the high precision requirements for universal rolling mill in the H-beam rolling process,reduce the difficulty of rolling mill adjustment in the production process,and stabilize the production and product quality.The small H-shaped steel plant of Bagang Company has been continuously optimized and improved in more than two years of practical application,forming a mature“H-H”rolling method.At present,the production and application of I-shaped steel and H-shaped steel have been fully covered.