摘要
通过热力学计算及实验,研究了微合金钢加钛脱氧后钢液中夹杂物的形态、组成、尺寸和类型,分析了加钛前后钢的组织变化.结果表明:加钛后,钢的组织明显细化,钛的脱氧产物可成为TiN夹杂的形核核心,还可以包覆在Al2O3夹杂周围,此类夹杂物呈细小弥散析出;这些细小的夹杂物可以在奥氏体晶粒内部诱发晶内铁素体析出,从而产生细化组织的效果.
The morphology, chemical composition, size and type of inclusions were investigated by experiment and thermodynamic calculation in a micro-alloyed steel deoxidized by Ti, and the structure of this steel was analyzed. The results show that grains are fine after adding Ti in the steel, the deoxidation product of Ti become the nucleus of TiN, or A1203 becomes the nucleus of the deoxielation product of Ti in solidification of liquid steel. After adding Ti, inclusions are finely distributed in the steel, and grains are fine by using the dispersion of fine inclusions as intragranular ferrite nucleated sites.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2008年第8期864-869,共6页
Journal of University of Science and Technology Beijing
关键词
微合金钢
氧化物冶金
夹杂物
晶内铁素体
micro-alloyed steel
oxide metallurgy
inclusions
intragranular ferrite
