我厂18Cr2Ni4WA等低炭Cr2Ni4型纲号的电渣钢生产上曾出现过二个问题。一是有时钢坯或钢材表面裂纹严重,见图1(A),图2(A)原因不明;二是出现低倍“断面夹杂”,见图1(B),图3(A),主要在钢锭的中下部和边部。由下至上渐轻,有一定的规律性此类夹杂主要出现在我厂夏季所用含CaO40 I plant 18Cr2Ni4WA other low-carbon Cr2Ni4 type of electroslag steel production there have been two problems. First, there are sometimes serious cracks on the surface of billet or steel, as shown in Figure 1 (A), Figure 2 (A) for unknown reasons; second, there is a low magnification “section inclusions”, as shown in Figure 1 (B), Figure 3 In the lower part of the ingot and the edge. Gradually from the bottom gradually, there is a certain regularity of such inclusions mainly appear in our factory in summer with CaO40