通过微观形貌和成分分析研究了低碳铝镇静钢经氮氢罩式炉退火处理后冷轧钢板表面出现的丝斑缺陷.结果表明,无丝斑缺陷的钢板表面均匀光亮,钢板表层无异常的碳元素富集;有丝斑缺陷的钢板表面明显发黑、呈丝带状,缺陷部位呈岛状或线状,异常元素是石墨碳,在钢板表层一定深度范围内碳元素含量明显高于钢板基体.
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