Control of Reoxidation Product in Oil Casing Steel
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摘要: 通过工业试验对精炼过程钢样中夹杂物的形貌和成分进行观测,结果表明,试验炉次中包钢样中除液态复合夹杂物外,存在一定数量连铸过程中二次氧化导致的Al2O3、MgO·Al2O3尖晶石夹杂物。对二次氧化产物的生成和控制机理进行分析,并以此为基础对钙处理工艺进行优化,优化后中包钢样中主要为液态复合夹杂物,Al2O3、MgO·Al2O3尖晶石夹杂物数量大幅度减少。Abstract: The shape and composition of inclusions in samples during secondary refining process were observed.A certain number of Al2O3 and Mg O·Al2O3 spinel inclusions were found besides liquid complex inclusions in tundish samples,which is caused by reoxidation during continuous casting.Then,The calcium treatment process was optimized based on the research on mechanism of reoxidation product formation and control.After optimization,the typical inclusions are liquid complex inclusions in tundish samples,while the number of Al2O3 and Mg O·Al2O3 spinel inclusions is reduced sharply.
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Key words:
- oil casing steel /
- calcium treatment /
- inclusion /
- reoxidation
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