穿孔轧制实践的理论总结  

Theoretical Summary of Piercing/Rolling Practice

作　　者：潘峰[1] PAN Feng(Baoshan Iron and Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]宝山钢铁股份有限公司,上海201900

出　　处：《钢管》2022年第3期25-27,共3页Steel Pipe

摘　　要：在已建立的斜轧穿孔理论体系的基础上,提出了2条穿孔轧制理论原则:原则一,在实现咬入的情况下,轧辊距离越大越好;原则二,控制穿孔孔腔效应。分析了小直径无缝钢管机组采用大扩径穿孔工艺轧制合金钢时增大管坯直径和减小穿孔出口锥角度的作用。介绍了穿孔机入口锥设计方法。阐述了大扩径机组宜采用较小的出口锥角或者采用一段式入口锥穿孔辊的设计思想。指出继续推进和丰富穿孔理论体系建设是提高无缝钢管轧制质量的有效途径之一。Based on the established rotary-rolling/piercing theory system,two piercing/rolling theoretic principles are put forward here in the article,i.e.,No.1:under the condition of proper biting-in,the larger the roll gap is,the better it is;No.2:properly controlling the piercing cavity effect.Analyzed are the effectiveness of increasing the billet diameter and reducing the outlet cone angle of the piercer,when using the large-sized expanding piercing process to roll the alloy steel tube with the small-sized seamless steel tube mill.Moreover the design method for the piercer inlet cone is described.Also elaborated is the design idea about applying rather small outlet cone angle or the one-section inlet cone piercing roll to the large-sized expanding mill.It is emphasized that keeping promoting and further completing the piercing theory system construction is one of the effective approaches to improving the rolling quality of the seamless steel tube.

关 键 词：无缝钢管 穿孔 理论体系 扩径率 入口锥角 出口锥角 

分 类 号：TG335.71[金属学及工艺—金属压力加工]