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本文采用提取-浸蚀联合法实现了化学上难以分离的σ相与M_(23)C_6相的分别测定。采用电解提取法可以测定σ+M_(23)C_6的含量。采用扫描电位浸蚀电量法可以测定M_(23)C_的含量。于是,σ相的含量可由两者之差计算。这种方法简单、迅速,它可以给出有关析出物的含量、成分和形貌的情报。本文还从一种新的电极过程的模型导出了扫描电位浸蚀电量法的定量分析公式:该公式表明,在其它参数不变时,浸蚀电量与钢中活性相的含量C_1~°成正比。该式与实验结果吻合。
In this paper, the combination of extraction - etching method to achieve chemically difficult to separate the σ phase and M_ (23) C_6 phase were measured. Using electrolytic extraction method can be determined σ + M_ (23) C_6 content. The content of M_ (23) C_ can be determined by scanning potential etching method. Thus, the content of the σ phase can be calculated from the difference between the two. This method is simple and rapid, it can give information on the content, composition and morphology of the precipitate. In this paper, we also derive a quantitative analytical formula of the scanning potential erosive power method from a new model of electrode process: This formula shows that the etching power is proportional to the active phase content in steel C_1 ~ ° when the other parameters are the same . The formula is consistent with the experimental results.