摘要
利用SEM和EDS分析了不同氧含量的冷轧搪瓷钢板中夹杂物的微观形貌和化学成分,采用电解法提取钢中的氧化物夹杂并用ICP进行定量分析,且通过氢渗透法研究了钢板的抗鳞爆敏感性。结果表明：铝镇静钢（w（O）为0.003%）中主要夹杂物为MnS和Al2O3,高含氧钢（w（O）为0.011%-0.021%）中主要夹杂物为MnS和Mn-Nb复合氧化物。w（O）〈0.019%时,随着w（O）增加,钢中氧化物夹杂质量分数增大,钢板氢渗透时间呈线性增加趋势,抗鳞爆性能增强;当w（O）〉0.019%时,氧化物夹杂质量分数反而下降,氢渗透时间缩短,抗鳞爆性能减弱;同时,钢水中w（O）越高,耐火材料的侵蚀越严重,不利于连铸生产。
The microstructure and chemical composition of the inclusions in the cold rolled enamel steel with different oxygen content were analyzed by SEM and EDS.The oxide inclusions were separated and extracted from the steel by electrolytic method,the content of which was measured by ICP.The fish scaling resistance performance of the steel sheets were studied by hydrogen permeation test.The results showed that the main inclusions were MnS and Al2O3 in the Aluminium-killed steel（the oxygen content was 0.003 %）and the main inclusions were MnS and Mn-Nb composite oxide in the steel with high oxygen content（the oxygen content was 0.011 %-0.021 %）.As the oxygen content was lower than 0.019 %,the mass fraction of the inclusions in the steel increased with the oxygen content increasing and the hydrogen permeation time of the steel sheets became longer,which indicated that the fish scaling resistance performance was improved.However,when the oxygen content was higher than 0.019 %,the mass fraction of the inclusions and the hydrogen permeation time declined and the fish scaling resistance performance was decreased.It could be found that erosion of the refractory was serious when the oxygen content in the steel was higher,which was very harmful for continuous casting.
出处
《钢铁研究》
CAS
2015年第5期17-19,29,共4页
Research on Iron and Steel
关键词
搪瓷钢
w(O)
氧化物夹杂
抗鳞爆
enamel steel
oxygen content
oxide inclusion
fish scaling resistance
