两种组织类型的X70钢级管线钢的带状组织浅析(上)  

Banded Structure Analysis of X70 Grade Steel with Dual Structures for Line Pipe(Part I)

作　　者：李平全[1] 霍春勇[1] 李金凤[1] 冯耀荣[1] 

机构地区：[1]中国石油天然气集团公司管材研究所,陕西西安710065

出　　处：《钢管》2006年第2期15-20,共6页Steel Pipe

摘　　要：根据抽检试验和工厂首批出证试验的结果,探讨和分析了铁素体+少珠光体型及针状铁素体型X70钢级管线钢带状组织的特点,带状组织形成与控轧及控冷工艺和钢的化学成分尤其是Mo的含量的关系,以及带状组织程度对钢管母材夏比冲击韧性、DWTT试验SA值、抗HIC性能的影响。Based on the results of the random test and the test with a first-lot factory certificate, discussed and analyzed are the banded structure features of X70 grade steel with the ferrite plus deficient pearlite and the acicular ferrite for the line pipe, the relations between the formation of the banded structure and the controlled rolling, the cold control process and the steel chemical composition, especially the Mo content, and also the influence of the banded structure extent on the base material Sharp impact toughness, the DWTT test SA values and the HIC resistance property of steel pipes.

关 键 词：X70钢级管线钢 带状组织 控轧及控冷工艺 HIC 浅析 

分 类 号：TG113.1[金属学及工艺—物理冶金]