摘要
通过津西钢铁公司H型钢冶炼过程中全氧和氮含量的变化分析了其对H型钢质量的影响,钢中的大型夹杂物和显微夹杂物的类型、形态等.利用体积率法计算了钢中各类型夹杂物的分布情况.钢水一次脱氧不彻底,钢中T[O]高,造成夹杂物多,夹杂含量波动为裂纹的形成埋下隐患;由中间包到铸坯,夹杂物的去除率约为40%左右;大部分夹杂物来源并不单一;铸坯中显微夹杂粒径较小,0～10μm的夹杂占64%以上,而大于20μm的夹杂约占20%.
The effect of total oxygen content and nitrogen content on the quality of H type steel and the type and morphology of macroinclusions and microinclusions in steel were analyzed concerning the change of total oxygen content and nitrogen content during H type steel manufacturing in Jinxi Steel. Volume rate method was applied to calculate the distribution of various inclusions in steel. Inadequate primary deoxidization in liquid steel and high total oxygen in steel account for excessive inclusions. The undulation of inclusion quantity ac-counts for the formation of cracks. From tundish to billet, the elimination rate of inclusions is about 40%. The origin of most inclusions is not unitary. The granule diameter of micro inclusions in billet is small. Inclusions of 0~10 μm account for over 64%, while inclusions of over 20 μm do about 20%.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第S1期26-31,共6页
Journal of University of Science and Technology Beijing
关键词
炼钢
全氧
夹杂物
脱氧
steelmaking
total oxygen
inclusions
deoxidization
