单机架减径率对无缝钢管周向壁厚影响的研究  

A Study Concerning Effect by Single Stand Reducing Rate on Circumferential Wall Thickness Evenness of Seamless Steel Tube

作　　者：陈今良[1] 白磊[2] 王军[1] 王海波[1] 

机构地区：[1]攀枝花学院材料工程学院,四川攀枝花617000 [2]太原科技大学重型机械教育部工程研究中心,山西太原030024

出　　处：《钢管》2015年第1期33-37,共5页Steel Pipe

摘　　要：在热轧无缝钢管的微张力减径工艺中,一般不会引发"内六方"缺陷,但是厚壁管在微张力减径时容易产生周向壁厚不均的质量缺陷。通过利用ANSYS/LS-DYNA有限元软件动态模拟不同机架的应力应变状态可以发现,采用微张力减径时,钢管的周向壁厚存在差异。在总减径率不变的前提下,降低单机架减径率,可以改善热轧无缝钢管的周向壁厚不均缺陷。During the slight-stretch reducing process of hot-rolled seamless steel pipes, normally, it is impossible to get the inner hexagonal defect developed. Nevertheless, in case of producing heavy-wall tubes, frequently, the slight-stretch reducing operation causes the quality defect of transversal uneven wall thickness. With employment of the ANSYS/LS-DYNA finite element （FE） software, the stress and strain statuses of different stands are dynamically simulated, which leads to identifying the fact that even in case of the pipe being slight-stretch reduced, there still exists circumferential wall thickness difference. Given that the total reduction ratio remains unchanged, decreasing the reduction ratio of the individual stand will eliminate the defect of circumferential wall thickness difference.

关 键 词：无缝钢管 微张力减径 减径率 周向壁厚差异 数值模拟 

分 类 号：TG335.71[金属学及工艺—金属压力加工]