论文部分内容阅读
为了弄清钢中总氧(T.O)和非金属夹杂物的量、尺寸之间的关系,本文选取四类钢种正常生产的铸坯,采用能进行大面积试样检测的ASPEX自动扫描电镜系统研究了钢中的T.O、夹杂物及两者之间的定量关系,并采用Thermo-calc热力学软件进行了计算和验证.结果表明:夹杂物的主要组成与钢的生产工艺有很大关系.随着夹杂物尺寸的增加,单位检测面积上该尺寸范围的夹杂物数量显著减少.与T.O<0.002%的钢种相比,T.O为0.01%的钢中夹杂物的数量、面积均明显增加.当T.O<0.002%时,T.O与夹杂物的面积表现出较好的对应关系.相比于夹杂物的数量来说,T.O更准确的表征夹杂物的面积.大型夹杂物的出现具有偶然性.实验结果与热力学计算结果、钢中氧硫含量吻合很好.
In order to understand the total oxygen (TO) and non-metallic inclusions in the steel volume and size of the relationship between the selection of four types of normal production of steel slab, with a large sample area can be tested ASPEX automatic scanning electron microscopy The quantitative relationship between TO and inclusions in steel and their relationship were studied and calculated and verified by Thermo-calc thermodynamic software.The results show that the main composition of inclusions is closely related to the production process of steel With the increase of the size of inclusions, the number of inclusions in this size range per unit area of detection is significantly reduced.The number and area of inclusions in steel with a TO of 0.01% is significantly increased when compared with the steel with TO <0.002% TO <0.002%, TO showed a good correspondence with the area of inclusions, TO more accurately characterize the area of inclusions than the number of inclusions.One large number of inclusions appeared by chance.Experimental results And thermodynamic calculations, the content of sulfur oxides in steel is in good agreement.