ABSTRACT

MnS inclusions in steels usually have many kinds of morphology. It is difficult to accurately obtain the characteristics of inclusions by two-dimensional observation due to the complex morphology of sulphides in steel, especially the type II MnS inclusions. In this study, the three-dimensional morphology of sulphide in high sulphur steel was investigated by using non-aqueous solution electrolytic etching. Inclusions with a circle and ellipse morphology in two-dimension show more complex morphology in three-dimension. The differences in the distribution, size, shape of sulphides between the two-dimensional and three-dimensional state in the high sulphur steel were studied. Compared with the statistical results of inclusions in two-dimension, the diameter and area in three-dimension are larger than those in two-dimension. Moreover, the proportional function between the size of inclusion in two-dimension and that in three-dimension is proposed.

摘要

钢中的MnS夹杂物通常具有多种形态。由于钢中硫化物的形态复杂，尤其是II型MnS夹杂物，很难通过二维观察准确获得夹杂物的特征。本研究采用非水溶液电解蚀刻法研究了高硫钢中硫化物的三维形貌。二维圆形和椭圆形形态的夹杂物，三维形态更复杂。研究了高硫钢中二维和三维状态下硫化物的分布、尺寸、形状的差异。与二维夹杂物统计结果相比，三维夹杂物的直径和面积比二维大。而且，