20CrMoNbVTiB连铸圆管坯热轧无缝钢管工艺探讨  

Discussion on Hot-rolling Process of Seamless Steel Tube with 20CrMoNbVTiB Continuous Casting Round Billet

作　　者：梁红星 孙晶 马继顺 LIANG Hongxing;SUN Jing;MA Jishun(Shandong Molong Petroleum Machinery Co.,Ltd.,Shouguang 262700,China)

机构地区：[1]山东墨龙石油机械股份有限公司,山东寿光262700

出　　处：《钢管》2023年第1期52-56,共5页Steel Pipe

摘　　要：针对110S钢级油管用20CrMoNbVTiB材质连铸坯塑性差,轧制时变形抗力大,轧制过程中出现问题较多的情况,探讨并优化了Φ180 mm连轧管机组的工艺,包括提高环形炉温度,穿孔机使用较低的转速、大喂入角,应用磨合后的轧辊,调整连轧管机轧辊转速,减径前使用中频炉再次加热荒管等。使用优化工艺后,热轧过程顺利完成,顶头使用寿命大幅提高,修磨率大幅减小,产品成材率由81.6%提高至91.5%。Addressing the problems as staying with the 20CrMoNbVTiB CC billet in Steel Grade 110S such as poor plasticity,high resistance against deformation during rolling process and a lot of difficulties as occurring in the rolling operation,the technological process of the Ф180 mm mandrel pipe mill is discussed and optimized,involving a number of measures,including increasing the circular furnace temperature,lowering the rpm of the piercer,adapting large feeding angle,using after running-in roll,adjusting MPM rpm,and re-heating the shell in the MF furnace prior to sizing process,etc.Thanks to the above mentioned optimization of the mill,the whole hot-rolling process is performed very well.Moreover the plug service life is greatly prolonged,the repair rate is remarkably reduced,and the yield is enhanced from 81.6%up to 91.5%.

关 键 词：无缝钢管 20CrMoNbVTiB 连铸 圆管坯 轧制工艺 

分 类 号：TE931.2[石油与天然气工程—石油机械设备] TG335.11[金属学及工艺—金属压力加工]