摘要
为了获得高表面质量的冷轧产品,采用场发射SEM、EPMA和高温激光观察等方法,系统研究了钢中w(Si)/w(P)不同配比对氧化铁皮形成、起泡和铁橄榄石相(Fe_(2)SiO_(4))液化温度的影响,明确了w(Si)/w(P)不同配比条件下界面元素富集及其氧化特性。结果表明:随着w(Si)/w(P)的提高,试样低温抗氧化能力提高,氧化增重速率峰值出现的温度逐渐提高,当w(Si)/w(P)为12时,氧化峰值温度提高至1 170℃,氧化增重速率峰值也急剧提高到1.08%/min;随着w(Si)/w(P)的提高,表层氧化铁皮鼓泡现象明显减轻;高温激光观察试验发现,随着w(Si)/w(P)的降低,氧化铁皮与基体界面处的Fe_(2)SiO_(4)相液化温度逐渐降低,w(Si)/w(P)为3条件下界面Fe_(2)SiO_(4)相于1 080℃开始出现液化现象。因此,添加P元素是降低Fe_(2)SiO_(4)相液化温度的一种有效而实用的方法,同时还可显著降低氧化铁皮的粘附力。
In order to obtain cold rolled products with high quality surface, adopting field emission SEM, EPMA and high temperature laser observation methods, the effects of different mass fraction ratios of w(Si)/w(P) in steel on the oxide film formation, blistering and liquefaction temperature of fayalite phase(Fe_(2)SiO_(4)) were systematically studied. The interfacial element enrichment and oxidation film characteristics under different w(Si)/w(P) ratios were determined. The results showed that with the increase of w(Si)/w(P) ratios, the antioxidant capacity of samples at low temperature were improved;the temperature of the peak oxidation weight gain rate was gradually increased. When w(Si)/w(P) ratios were 12, the peak oxidation rate temperature was increased to 1 170 ℃ and the peak oxidation weight gain rate also was increased sharply to 1.08%/min. With the increase of w(Si)/w(P) ratios, the surface scale blistering phenomenon were significantly reduced.The high-temperature laser observation experiment found that with the decrease of w(Si)/w(P) ratios, the Fe_(2)SiO_(4)phase liquefaction temperature was gradually decreased, under the condition of w(Si)/w(P) ratios were 3, the Fe_(2)SiO_(4)phase liquefaction temperature was 1 080 ℃. The addition of P element is an effective and practical method to reduce the melting temperature of Fe_(2)SiO_(4)phase, and at the same time, it can significantly reduce the adhesion force of the oxidation scale.
作者
王畅
于洋
王林
高小丽
吴耐
陈瑾
WANG Chang;YU Yang;WANG Lin;GAO Xiaoli;WU Nai;CHEN Jin(Technology Institute of Shougang Group Co.,Ltd.,Beijing 100043,China;Beijing Shougang Co.,Ltd.,Beijing 100043,China;Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology,Beijing 100043,China)
出处
《轧钢》
2022年第1期15-20,共6页
Steel Rolling
基金
国家重点研发计划项目(2017YFB0304900)。
