钢中微细夹杂物的评价方法

来源期刊：冶金分析2011年第2期

论文作者：祝凯 杨健 王睿之 沈建国 杨振国

文章页码：1 - 7

关键词：分析评价； 钢铁； 夹杂物； 氧化物冶金

Key words：evaluation； steel； inclusion； oxide metallurgy

摘    要：为了对钢中微细夹杂物进行有效的分析评价,本文以氧化物冶金工艺引入的小粒径、均匀且弥散分布的夹杂物为例,建立了一种对微细夹杂物的粒径及分布、成分和形貌进行分析评价的方法。以扫描电子显微镜、透射电子显微镜和能谱分析仪相结合对钢中微细夹杂物进行分析,发现了采用氧化物冶金工艺的钢中夹杂物主要成分所生成的粒子为以MgO、CaO为核心,外层包缚着MnS的细小夹杂物;含Mg的氧化物粒子的形状为长方体,表面平整光滑,边缘处棱角分明,大小约为1μm×0.8μm×0.3μm。同时还发现用氧化物冶金工艺的钢其微细夹杂物数量明显高于用常规冶炼工艺的钢。采用本方法可以对钢中微细夹杂物进行较为系统、全面的评价分析。

Abstract: For the evaluation of fine inclusion in steel efficiently,an evaluation method from the aspects of particle diameter,distribution,composition and morphology has been established on the basis of dispersedly distributed fine inclusions introduced by oxide metallurgical technology.The fine inclusions were test by employing scanning electron microscopy (SEM) and transmission electron microscopy (TEM) combined with energy dispersive spectrometer.it was concluded that the inclusions in steel smelted by oxide metallurgical technology were particles with MgO or CaO as core surrounded by MnS.The oxide particle with Mg was cuboid with smooth surface and angular edge.Its size was about 1 μm×0.8 μm×0.3 μm.In addition,it was be found that the inclusions number in steel by oxide metallurgical technology was obviously higher than that by general metallurgical technology.Based on this study,This method could be applied for systematic and comprehensive assessment of fine inclusion in steels.