MECHANISM OF RED SCALE DEFECT FORMATION IN SI-ADDED HOT-ROLLED STEEL SHEETS
MECHANISM OF RED SCALE DEFECT FORMATION IN SI-ADDED HOT-ROLLED STEEL SHEETS
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DOI：
10.2355/isijinternational.34.906
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发表时间：
1994-01-01
影响因子：
1.8
通讯作者：
MAEHARA, Y
中科院分区：
文献类型：
--
作者：
FUKAGAWA, T;OKADA, H;MAEHARA, Y
实验再现了加硅热轧钢板的主要缺陷之一红鳞。在详细观察水垢性质的基础上，提出了红水垢的形成机理。热轧前FeO的不完全氧化会导致即使在无Si钢中也会形成红色氧化皮，因为FeO氧化皮的破碎大大加速了FeO向Fe 3 O 4和红色Fe 2 O3的反应。在添加Si的钢中，由于FeO/Fe 2SiO 4的共晶化合物在氧化皮/钢界面处形成，并且不规则地渗透到上部FeO和下部钢侧，因此很难进行氧化。低共熔化合物的相当高的强度，即使仅低于1173摄氏度的固相线温度，也会使其难以熔化。
The red scale, which is one of the major defects on hot-rolled Si added steel sheets, is reproduced experimentally. On the basis of detailed observation of the scale properties, we propose the mechanism of formation of the red scale. Imcomplete descaling of FeO prior to hot rolling causes red scale formation even in Si-free steels, since the reaction from FeO to Fe3O4 and red Fe2O3 is largely accelerated by the breakage of the FeO scale. In Si-added steels, descaling is quite difficult to perform, because the eutectic compound of FeO/Fe2SiO4 is formed at the scale/steel interface and penetrates irregularly into both upper FeO and lower steel sides. Quite high strength of the eutectic compound, even just below the solidus temperature of 1173 degrees C, can also make it difficult to descale.