渣-钢反应对高强度合金结构钢中生成较低熔点非金属夹杂物的影响  

Effect of Slag-Metal Reaction on Formation of Non-metallic Inclusions of Lower Melting Temperature in High Strength Alloyed Structural Steel

作　　者：王新华[1] 陈斌[2] 姜敏[1] 王万军[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]首钢技术研究院,北京100041

出　　处：《钢铁》2008年第12期28-32,共5页Iron and Steel

基　　金：国家重大基础研究项目课题(2004CB619106)

摘　　要：钢中非金属夹杂物绝大多数为较低熔点夹杂物,可以显著改善钢材的抗疲劳破坏性能。对炉渣-钢液-夹杂物间相互作用进行了实验室研究,发现钢中MgO-Al2O3系高熔点夹杂物的比率随渣-钢反应时间增加而减少,与Al2O3的质量分数为20%和CaO/SiO2约为5的炉渣相比,采用Al2O3的质量分数为41%和CaO/SiO2约为6.5的炉渣,CaO-MgO-Al2O3-SiO2系夹杂物的比率由24.3%增加至81.7%,大多数夹杂物位于较低熔点成分区域(≤1 500℃)。If the non-metallic inclusions in alloying steels are of low melting temperature, the fatigue life of steels can be significantly improved. A laboratory study was carried out to investigate the inter reaction between slag, metal and inclusions. It was found that the amount of the high melting temperature inclusions of MgO-Al2O3 type decreased with increasing the slag-metal reaction time. Compared with using the slag containing about 20% Al2O3 and with a basicity of about 5, by using higher Al2O3 and higher basicity slag （Al2O3：41%, CaO/SiO2 ：6. 5）, the portion of CaO-MgO-Al2O3-SiO2 inclusions could be increased from 24.4% to 81.7% and most of them were of low melting temperature （41500 ℃ ）.

关 键 词：合金结构钢 炼钢 炉渣 非金属夹杂物 熔点 

分 类 号：TF762.3[冶金工程—钢铁冶金]