论文部分内容阅读
为了提高大锻件用钢质量,控制夹杂物形态、尺寸、数量并使其均匀分布十分重要。Ⅵ法的实质就是在RH真空脱气过程中进行钢包喷粉。Ⅵ处理以后,钢中的夹杂物呈球状,其数量明显减少。用图象分析方法测定夹杂物面积百分数为0.02～0.03％,夹杂物平均尺寸为2～4μm。大量生产数据的统计分析表明,钢中夹杂物的数量与钢中氧含量、出钢温度及Ⅵ处理时间的自然对数的倒数有正相关关系。夹杂物尺寸与钢包砖缝泥料中SiO_2％及Ⅵ处理时间亦有正相关关系。
In order to improve the quality of steel forgings, it is very important to control the shape, size and quantity of inclusions and make them evenly distributed. VI method is the essence of RH vacuum degassing ladle dusting process. After Ⅵ treatment, inclusions in the steel were spherical, the number was significantly reduced. The area percentage of inclusions was 0.02 ~ 0.03% by image analysis method, and the average size of inclusions was 2 ~ 4μm. Statistical analysis of mass production data shows that there is a positive correlation between the amount of inclusions in the steel and the reciprocal of the natural logarithm of the oxygen content in the steel, the tapping temperature, and the Ⅵ processing time. The size of inclusions is also positively correlated with the treatment time of SiO_2% and Ⅵ in ladle grouts.