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| large nonmetallic inclusions in ingot (【技】钢锭中尺寸大于 l00μm 的非金属夹杂物。多半为铁锰硅酸盐、铝酸盐或莫来石、刚玉等。其主要来源是耐火材料的浸蚀物或钢水二次氧化的产物。为减少钢锭中的大型夹杂物，在出钢和浇注过程中应采取措施防止各种夹杂物进人钢水：对碳锰含量较低、硅铝含量较高的钢种，应防止钢水二次氧化；对碳锰含量较高、硅铝含量较低的钢种，则应防止耐火材料的浸蚀。) | |||
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