微扩径技术生产特厚壁热轧无缝钢管的工艺研发  

R&D of Process with Slight-expansion Technology for Producing Extra-heavy-wall Hot-rolled Seamless Steel Tube

作　　者：罗忠辉 考然 米永峰[1] 郭志文[1] 姜海龙[1] 许博超 孟庆飞[1] LUO Zhonghui;KAO Ran;MI Yongfeng;GUO Zhiwen;JIANG Hailong;XU Bochao;MENG Qingfei(Inner Mongolia Baogang Ganglian Co.,Ltd.,Baotou 014010,China)

机构地区：[1]内蒙古包钢钢联股份有限公司,内蒙古包头014010

出　　处：《钢管》2021年第6期47-49,共3页Steel Pipe

摘　　要：叙述了采用锥形辊穿孔机微扩径穿孔技术开发大直径特厚壁热轧无缝钢管的设计方法。详细介绍了穿孔机轧辊角度及变形区长度的确定方法,以及使用穿孔机孔型计算公式结合3D建模设计顶头的方法。通过合理的穿孔机孔型设计,结合锥形辊穿孔机微扩径工艺技术,在锥形辊穿孔机上实现了径壁比≤5的特厚壁无缝钢管的生产,锥形辊穿孔机微扩径穿孔工艺的成功开发为拓宽无缝钢管产品应用市场奠定了基础。Described here in the essay is the design method for developing the large-sized extra-heavy-wall,hot-rolled seamless steel tube with the cone type piercer(CTP)slight-expansion/piercing technique.Detailed are the method for determining the rolling angle and the deformation section length of the CTP,and the method for designing the piercing plug with both the CTP pass calculation formula and the 3-D model-setting process.Finally thanks to the proper CTP pass design and the CTP slight-expansion technique,the extra-heavy-wall seamless steel tube with D/S≤5 is actually produced.The successful development of the said CTP slight-expansion/piercing process lays a foundation for further expanding the application market of the seamless steel tube.

关 键 词：热轧无缝钢管 大直径 特厚壁 锥形穿孔机 微扩径工艺 

分 类 号：TG335.71[金属学及工艺—金属压力加工]