P110石油套管缺陷分析  

Defect Analysis of P-110 Grade Oil Casing

作　　者：赵金锋[1] 刘雅政[1] 李亚欣[1] 邹喜洋 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]衡阳华菱钢管(集团)有限公司技术中心,湖南衡阳421001

出　　处：《热加工工艺》2009年第6期155-157,160,共4页Hot Working Technology

摘　　要：采用显微组织观察和SEM分析研究了P110石油套管热处理后的缺陷,通过分析缺陷产生环节、原因,对缺陷进行了分类。第一类外折缺陷并不是在热处理过程中产生的,而是产生在穿孔及轧制过程中;第二类淬火裂纹缺陷的产生与硫化物的形成以及淬火应力有关。可以通过控制硫的含量、避免产生共晶硫化物,改善其分布状态,改善淬火工艺以减小淬火应力来消除。The defects which were found in detection after heat treatment were studied by metallographic observing and SEM analysis. They were classified by analyzing when and why the defects happened. The first kind of defects were outside fold, they generated in perforation and rolling not in heat treatment; the second kind of defects were thermal treatment cracks, which were related to sulfide inclusion formation and quenching stress. This kind of defects can be eliminated by controlling S content, avoiding eutectic sulfide, improving sulfide distribution and meliorating quenching process to minish quenching stress.

关 键 词：石油套管 缺陷 淬火应力 

分 类 号：TG157[金属学及工艺—热处理]