摘要
采用热模拟技术,EBSD技术和透射电子显微镜对镁处理高钢级管线钢的焊接热影响区（HAZ）晶内铁素体（IGF）的形核现象和机制进行了试验研究。结果表明：镁处理钢中形成大量的Al、Ti、Mg复合氧化物夹杂,其颗粒大小为0.5-3μm。在粗晶热影响区（CGHAZ）中,含Mg复合氧化物具有促进晶内针状铁素体形核的能力。对Mg处理高钢级管线钢焊接热影响区晶内铁素体的形核机制进行了探讨。
The phenomena and mechanism of nucleation of intra-granular ferrite in welding heat affected zone of Mg treated high-grade pipeline steel was studied by using thermal simulation,EBSD and transmission electron microscope.The results indicate that the inclusions in Mg treated steel are A1,Ti,Mg composite oxides with size in the range of 0.5-3 μm.Mg composite oxides could promote the formation of acicular ferrite in coarse grain heat affected zone.The nucleation mechanisms of intra-granular ferrite in Mg treated high-grade pipeline steel was discussed.
出处
《钢铁》
CAS
CSCD
北大核心
2010年第2期82-85,共4页
Iron and Steel
关键词
高钢级管线钢
镁处理
晶内铁素体
形核机制
high-grade pipeline steel Mg treatment intra-granular ferrite mechanism of nucleation
