摘要
本研究制备了不同氧、硫含量的实验钢,采用SEM-EDX和CSLM探讨了钢中夹杂物类型及高温演变规律.结果表明,脱氧生成的MgO大多为球形,而MgO·Al2O3呈现不规则形状.单独铝脱氧钢中Al2O3夹杂物通过移动、碰撞、聚合的方式形成大型簇团.铝镁复合脱氧钢中夹杂物形貌和动态演变随着[Al],[Mg]和[S]含量的变化呈现出不同的现象.当[Mg],[Al]含量满足MgO生成条件时,夹杂物无明显聚合现象,呈弥散分布的特征;当[Mg],[Al]含量位于MgO·Al2O3生成区域时,未观察到团簇状夹杂物出现,但夹杂物粒径较MgO大;当夹杂物成分同时满足MgO和MgS生成条件时,夹杂物聚合趋势明显,推测是硫化物的形成促进了夹杂物的聚合现象.
The inclusions characteristics and dynamic evolution of high-temperature experimental melts with different S and O content were studied by using SEM-EDS and CSLM. The results showed that most of MgO in the deoxidation melt is spherical, but the MgO · Al2O3 presents irregular shape. Large inclusions of Al2O3 is easy to form in Al-killed molten steel through travelling, collision and aggregation. However, the characteristics of inclusions in Al-Mg complex deoxidation melts are different, depending on the content of [ Al], [ Mg ] and [ S ]. When the content of [ Mg ] and [ Al] meets the condition of MgO, the inclusions show no obvious aggregation tendency, even have isolated and dispersed distribution. When the content of [ Mg ]and [Al] meets the condition of MgO . Al2O3, the inclusions also show no obvious aggregation tendency, but the size of single particle is larger than that of MgO particles. When the content meets the formation condition of MgO and MgS simultaneously, the aggregation tendency of the inclusions is obvious. It is easily speculated that the sulphides promote the aggregation of the inclusions.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第9期1270-1274,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51374059)
中央高校基本科研业务费专项资金资助项目(N120602005
N120502004)
关键词
镁
脱氧
夹杂物
热力学
动态演变
magnesium
deoxidation
inclusion
thermodynamic
dynamic evolution
作者简介
张同生（1984-），男，河北邯郸人，东北大学博士研究生；
姜茂发（1955-），男，山东栖霞人，东北大学教授，博士生导师．
