焊管2012，Vol.35Issue(9)：13-16,4.
焊接热输入对X100管线钢焊接热影响区组织与强度的影响
Effect of Welding Heat Input on Microstructure and Strength of the Heat Affected Zone for X100 Pipeline Steel
陈延清 1许良红 1牛辉2
作者信息
- 1. 首钢技术研究院,北京100043
- 2. 宝鸡石油钢管有限责任公司,陕西宝鸡721008
- 折叠
摘要
Abstract
The welding thermal simulation and microstructure analysis technology were used to investigate the variation of strength and microstructure for X100 HAZ. The results indicated that the strength of CGHAZ in X100 pipeline steel is reduced in some degrees after welding thermal cycle. With the heat input increasing, the decrease range is increased. When the heat input is up to 40 kJ/cm, the strength of CGHAZ will not meet the lowest requirement of XI00 pipeline steel. The softening of CGHAZ is attributed to the increasing of granular bainite and the coarsening of the grain substructure, as well as the percentage of granular bainite and the coarsening extent both increase with heat input increasing.关键词
X100/焊接热输入/强度/粗晶区/显微组织Key words
X100/ welding heat input/ strength/ coarse grain/ microstructure分类
矿业与冶金引用本文复制引用
陈延清,许良红,牛辉..焊接热输入对X100管线钢焊接热影响区组织与强度的影响[J].焊管,2012,35(9):13-16,4.
