摘要
研究了轴承钢生产中各因素对钢中D类夹杂物形成的影响.对国内某特殊钢厂轴承钢中夹杂物进行了检验分析,发现钢中D类夹杂物存在多种形式;通过感应炉重熔实验,发现钢中Al含量对夹杂物的影响很大,Al过量,在MgO炉衬条件下,会大量生成MgO.Al2O3;当钢中Ca含量较高时,夹杂物全部变性为球状钙铝酸盐.研究表明,控制钢水中Ca、Mg和Al成分,是控制D类夹杂的重要手段.通过工厂试验证明,特定炉渣改性和成分优化对D类夹杂物有一定的改善作用.
The formation and transformation of non-metallic globular inclusions （Type-D inclusions） in bearing steel production were studied. There were different kinds of Type-D inclusions in the commercial specimens of bearing steel from SEM inspection. Al content had important effect on the inclusion formation in the experiment of an induction furnace. A great amount of MgO·Al2O3 formed with high Al deoxidation in MgO crucible melting. With high content of Ca, the inclusions of MgO·Al2O3 spinel will become calcium-aluminates entirely. The results show that the contents of Ca, Mg and Al in liquid steel have important effect on the formation of Dtype inclusions. It is tested in the experiment of bearing steel production that Type-D inclusions can be improved by specific slag modification and composition optimization.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第8期771-775,共5页
Journal of University of Science and Technology Beijing
关键词
轴承钢
夹杂物
钙铝酸盐
碱度
bearing steel
inclusion
calcium-aluminates
basicity
