焊管Issue(12)：10-15,6.
低碳贝氏体型厚壁X70管线钢低温韧性研究
Study on Low Temperature Toughness of Low Carbon Bainitic X70 Pipeline Steel with Heavy Wall Thickness
谌铁强 1宋欣 1张国栋 1白学军 1李群1
作者信息
- 1. 秦皇岛首秦金属材料有限公司，河北 秦皇岛 066326
- 折叠
摘要
Abstract
Based on the clean steel-making technology, extremely thick slabs and optimized TMCP process, through comparison of three different chemical composition system, the effect of different composition on the low temperature toughness for 25mm X70 pipeline steel was studied, and the thought utilizing low C-Mo-Ni composite composition to produce bainitic pipeline steel with heavy wall thickness was determined. Based on this situation, the industrial production of X70 line pipe with size ofφ1 219 mm×30.2 mm was conducted. After the plates were made into pipes, the strength and toughness of pipe increase slightly, the microstructure of weld and base metal is similar to base metal, and it is with good weldability.关键词
X70管线钢/低温韧性/大壁厚/工艺组织Key words
X70 pipeline steel/low temperature toughness/thick wall thickness/process and microstructure分类
矿业与冶金引用本文复制引用
谌铁强,宋欣,张国栋,白学军,李群..低碳贝氏体型厚壁X70管线钢低温韧性研究[J].焊管,2014,(12):10-15,6.
