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应用电解抽取、X线衍射、电子探针、扫描电镜等分析技术,研究了合成物和钢中生成的钙锰硫化物的互溶特征与形态,明确了以下方面。CaS与MnS是能够全率互溶的,但实际钢样中生成的(Ca,Mn)S或(Mn,Ca)S通常具有晶格常数不同的1～3相。生成相数与其平均组成Ca/Ca+Mn(原子比)有关,由此可划分出1相区、2相区和3相区。当该原子比值在30～85％之间,必定生成2相以上,其中主量相的组分和形状也依赖于平均组成。钙含量越高,相的形状越趋球化。为控制钢中大部分硫化夹杂物成为球状,应使生成钙锰硫化物的平均组成Ca/(Ca+Mn)(原子比)大于65％。
The characteristics and morphology of the mutual solubility of calcium and manganese sulfides formed in the composites and steel were studied by the techniques of electrolysis extraction, X-ray diffraction, electron probe and scanning electron microscopy. The following aspects were clarified. CaS and MnS are completely miscible with each other. However, (Ca, Mn) S or (Mn, Ca) S formed in actual steel samples usually have 1 to 3 phases with different lattice constants. The number of generated phases is related to its average composition Ca / Ca + Mn (atomic ratio), so that 1-phase zone, 2-phase zone and 3-phase zone can be distinguished. When the atomic ratio is between 30 and 85%, two or more phases must be generated, and the composition and shape of the major phase also depend on the average composition. The higher the calcium content, the more the phase shape of the ball. To control most of the sulfide inclusions in the steel to be spherical, the average Ca / (Ca + Mn) (atomic ratio) of the resulting calcium-manganese sulfides should be greater than 65%.