Reaction mechanisms between molten CaF2-based slags and molten 9CrMoCoB steel
Reaction mechanisms between molten CaF2-based slags and molten 9CrMoCoB steel
复制标题
DOI：
10.1007/s12613-020-1976-5
复制
发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
Leizhen Peng;Zhou-hua Jiang;X. Geng
中科院分区：
文献类型：
--
作者：
Leizhen Peng;Zhou-hua Jiang;X. Geng
研究电渣重熔渣与9 CrMoCoB钢之间的反应机理，对于电渣重熔工艺中合理的渣系和生产合格的钢锭具有重要意义。研究了9 CrMoCoB钢与55wt%CaF2-20wt%CaO-3wt%MgO-22wt%Al2O3-xwt%B2O3（x= 0.0，0.5，1.0，1.5，2.0，3.0）渣系的平衡反应。根据9 CrMoCoB钢和不同B2 O3含量的渣样在不同反应时间的成分，推断了9 CrMoCoB钢与渣的反应机理。结果表明，当渣中B2 O3含量为0.5wt%，FeO含量为0.18wt%~ 0.22wt%时，可将钢中B含量控制在目标范围内。当B2 O3含量≥ 1wt%时，Si与B2 O3发生反应，导致钢中B含量增加。SiO2和B2 O3的加入量应与电极中[B]/[Si]的质量比雅阁，SiO2的加入抑制了Si与Al 2 O3的反应。
Investigating the reaction mechanism between slag and 9CrMoCoB steel is important to develop the proper slag and produce qualified ingots in the electroslag remelting (ESR) process. Equilibrium reaction experiments between molten 9CrMoCoB steel and the slags of 55wt%CaF2-20wt%CaO-3wt%MgO-22wt%Al2O3-xwt%B2O3(x= 0.0, 0.5, 1.0, 1.5, 2.0, 3.0) were conducted. The reaction mechanisms between molten 9CrMoCoB steel and the slags with different B2O3contents were deduced based on the composition of the steel and slag samples at different reaction times. Results show that B content in the steel can be controlled within the target range when the B2O3content is 0.5wt% and the FeO content ranges from 0.18wt% to 0.22wt% in the slag. When the B2O3content is ≥1wt%, the reaction between Si and B2O3leads to the increase of the B content of steel. The additions of SiO2and B2O3to the slag should accord to the mass ratio of [B]/[Si] in the electrode, and SiO2addition inhibits the reaction between Si and Al2O3.