在线常化工艺生产N80钢级石油套管  

Production of N80 Grade Oil Casing with On-line Normalizing Process

作　　者：李金锁 赵永恒[2] 

机构地区：[1]天津冶金集团中兴盛达钢业有限公司,天津301616 [2]天津市无缝钢管厂,天津300220

出　　处：《天津冶金》2015年第5期34-37,共4页Tianjin Metallurgy

摘　　要：介绍了天津市无缝钢管厂采用36Mn2V管坯,运用在线常化工艺生产N80高钢级石油套管的情况。生产实践证明,再加热炉加热温度控制、荒管经减径到成品管的减径量控制、减径后管体终轧温度控制、荒管在常化链和钢管在冷床上的冷却速度控制是保证产品性能的关键环节。在大生产模式的条件下,对于直径为Φ114-Φ177.8 mm,壁厚6.2-9.19 mm的钢管,采用步进炉二次加热温度910-930℃,定径后终轧温度810-840℃,荒管脱除芯棒后的冷却速度≥220℃/min的工艺可以获得满意的性能。This paper introduces the application of on-line normalizing process to produce N80 high grade oil casing with 36Mn2 V tube blank in Tianjin seamless steel. Production practice proof that the control of heating temperature of the reheating furnace, reduction from billet tube to finished tube diameter, finish rolling temperature after tube diameter reduction and cooling rate of billet tube in the normalization of chain and the cooling bed are the key links to guarantee the performance of the product. Under the conditions of the production model, for steel pipes with diameter of Φ114-Φ177.8mm, wall thickness of 6.2-9.19 mm, the process of secondary heating temperature in the furnace 910 to930 ℃, finish rolling temperature 810-840 ℃ after sizing, cooling rate is more than or equal to 220 ℃/min after mandrel removal can obtain satisfactory performances of tube.

关 键 词：石油套管 常化 冷却速度 终轧温度 二次加热 减径 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]