AISI 4145H石油钻铤用管轧制工艺开发

为解决Assel轧管机组生产超长特厚壁钻铤用管(径壁比≤3.7)轧制顺行问题和提高纵横向壁厚均匀性,实施了坯型优选、变形量合理分配、穿孔机和轧管机参数调整以及减径机孔型参数和速度制度优化等一系列技术措施.生产的钻铤管成品长度达标,包括横向与纵向壁厚均匀性在内的尺寸精度都达到了较高水平,符合指标要求.用户使用表明,与棒料相比,采用管料加工制造钻铤具有节省材料,合格率高,工效高,和工具消耗降低等综合有优点.

Development of AISI 4145H drill collar tubes

To solve the problems of rolling along the line of long thick-walled drill collar tubes(the ratio of outer diameter and wall thickness(D/S)≤3.7) in Assel mill and promote the uniform of wall thickness,a series of technical measures were carried out,such as optimizing the billet properly,distributing the deformation reasonably,adjusting the parameters of piercer and Assel mill,and optimizing the pass parameters and the speed setting of the reducing mill.The length of finished drill collar tubes completely meets the standard,and the uniform of wall thickness in transversal and longitudinal directions reaches the higher standard.The user experience shows that,the use of tubes as raw materials is better than that of bars in saving materials,promoting the pass rate,improving the efficiency,and reducing the tool consumption.