无缝钢管生产技术的新进展

New Development of Seamless Steel Tube Manufacturing Technologies

无缝钢管生产已逐渐从追求产量向提高质量,扩大品种,降低成本方向发展,其间不断涌现新的设备与工艺。简介了国内外生产技术的发展情况;比较了步进式与环形式管坯加热炉的应用特点;概述了锥形辊穿孔机、少机架限动芯棒连轧管机、PQF连轧管机及半浮/在线脱棒技术、紧凑式轧管技术、张力减径机/定径机的三辊可调技术及快速换辊技术、钢管质量自动控制技术(如连轧管机的HGC控制技术、张力减径机增厚端及壁厚自动控制技术)、钢管在线壁厚检测技术等新工艺、新设备的特征。

The general development trend of seamless steel tube industry has been switched from output enhancement to product quality improvement,product mix expansion and operational cost reduction,resulting in a number of new equipment and technologies.Briefed in the paper are the development of seamless steel tube manufacturing technologies both at home and abroad.Other issues also involved here are a comparison of the application characteristics between the walking beam billet heating furnace and the rotary billet heating furnace,descriptions of the characteristics of such new processes and equipment as cone-type piercer,MINI-MPM,PQF MPM,semi-floating mandrel/on-line mandrel extracting processes,compact tube-rolling process,three-roll adjustment and quick roll change-over of stretch reducing mill and sizing mill,auto-control processes of tube quality(e.g.,the HGC control process for MPM and auto-control process of tube end upset and gage of stretch reducing mill)as well as steel tube on-line gage inspection process.