北京科技大学学报2012，Vol.34Issue(5)：535-540,6.
稀土处理钢中夹杂物对晶内针状铁素体形成的影响
Effect of inclusions on the formation of intra-granular acicular ferrite in steels containing rare earth elements
邓小旋 1王新华 1姜敏 1胡志勇 1邵肖静 1王万军1
作者信息
- 1. 北京科技大学冶金与生态工程学院,北京100083
- 折叠
摘要
Abstract
The effects of inclusion characteristics, such as type, size distribution and volume fraction on the formation of intra- granular acicular ferrite （IAF） in steels containing rare earth （RE） elements were investigated by optical microscopy, scanning elec- tron microscopy and the point counting method, It is shown that the type and volume fraction of inclusions both play a critical role in IAF formation. A low mismatch value of 1.9% between ferrite and RE-oxides （ including RE-oxysulfide） decreases the energy barrier on the inclusion surface for IAF nucleation and accelerates the nucleation on RE oxides. But RE-sulfides which have a high mismatch value of 42.5% with ferrite cannot induce IAF. The volume fraction of IAF increases with the volume fraction of inclusions increasing. When the volume fraction of inclusions reaches 9.5×10^-4, the volume fraction of IAF is 53%.关键词
精炼/稀土元素/针状铁素体/夹杂物/微观组织Key words
refining/rare earth elements/acicular ferrite/inclusions/mierostrueture分类
冶金工业引用本文复制引用
邓小旋,王新华,姜敏,胡志勇,邵肖静,王万军..稀土处理钢中夹杂物对晶内针状铁素体形成的影响[J].北京科技大学学报,2012,34(5):535-540,6.
