钢管“内六方”缺陷的产生原因及优化  

Causes for“Hexagonal Bore”Defect of Steel Pipe and Relevant Optimization Measures

作　　者：孟庆飞[1] MENG Qingfei(Inner Mongolia Baotao Steel Union 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》2020年第6期45-48,共4页Steel Pipe

摘　　要：分析热轧无缝钢管生产中“内六方”问题产生的原因,并提出解决方案。分析认为:在生产线设计投产后,由于受到机架备置量、产品范围要求的限制,通过修改总的减径量或者单机架的减径量,轻易无法改善“内六方”缺陷,因此并不是最好的优化措施;在一定的减径比和总减径比设计前提下,通过优化孔型椭圆度可以使“内六方”问题得到明显改善,椭圆度越大越容易出现“内六方”问题。Analyzed here in the article are the causes for the**Hexagonal Bore'defect as encountered with during the production of the hot-rolled seamless steel pipe,and the solution for it.It is concluded as follows via the analysis.Since the start-up of the production line,as limited by the roll stand allocation and the product range requirement,etc.,it has been not so easy to fix the said“Hexagonal Bore”defect problem just by correcting the general reduction amount or the individual stand reduction amount,which is not the best optimization way.Given the specific reduction ratio and the general reduction ratio are designed,optimizing the pass ovality will get the said defect obviously alleviated.The bigger the ovality,the higher possibility for the defect to occur.

关 键 词：钢管 张力减径机 椭圆度 减径比 内六方 

分 类 号：TG335.71[金属学及工艺—金属压力加工]