Laboratory-scale experiments were performed to investigate the deoxidation of H13 tool steel with CaF₂-MgO-Al₂O₃-CaO-SiO₂ slags at 1873 K. The calculation of thermodynamics and kinetics was also verified through the experimental results. The results show that [Si]-[O] reaction is the control reaction, and with the increase of basicity of slag, the limitation of deoxidation was decreased. The limitation of deoxidation is the lowest for the slag with basicity of 2.0. Under the conditions of the basicity of 2.0 and the content of CaF₂ more than 50%, the limitation of deoxidation is less than 10 × 10⁻⁶, and it does not depend on the contents of Al₂O₃ and CaF₂ in slags. The mass transport of oxygen in the metal phase is the rate-controlling step, and the slag composition has no effect on the equilibrium time of deoxidation. Based on this finding, the optimized slag composition is designed and it contains the following components: 51.5% CaF₂ 20.3% MgO, 16.2% Al₂O₃, 8.2% CaO and 3.8% SiO₂. In the case of the optimized deoxidizing slag, the total oxygen content in H13 steel can be reduced from 25 × 10⁻⁶ to 6 × 10⁻⁶.

进行了实验室规模的实验，以研究H13工具钢在1873 K上用CaF ₂ -MgO-Al ₂ O ₃ -CaO-SiO ₂炉渣进行的脱氧。通过实验结果也验证了热力学和动力学的计算。结果表明，[Si]-[O]反应为控制反应，随着矿渣碱度的增加，脱氧的极限降低。炉渣的脱氧极限最低，碱度为2.0。在碱度为2.0且CaF ₂含量大于50％的条件下，脱氧极限小于10×10 ^-6，并且不取决于Al ₂ O的含量₃和CaF ₂在炉渣中。氧在金属相中的传质是控制速率的步骤，炉渣组成对脱氧的平衡时间没有影响。基于这一发现，优化矿渣组合物被设计，它包含下列组分：51.5％的CaF ₂ 20.3％的MgO，16.2％的Al ₂ ö ₃，8.2％CaO和3.8％的SiO ₂。在优化脱氧渣的情况下，H13钢中的总氧含量可以从25×10 ^-6降低到6×10 ^-6。