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首页> 外文期刊>ISIJ international >Effect of Tundish Flux on Compositional Changes in Non-metallic Inclusions in Stainless Steel Melts
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Effect of Tundish Flux on Compositional Changes in Non-metallic Inclusions in Stainless Steel Melts

机译：中包焊剂对不锈钢熔体非金属夹杂物组成变化的影响

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The effect of the tundish flux on the evolution of non-metallic inclusions in Si-killed 304 (18%Cr-8%Ni) stainless steel has been investigated at 1773 K. The interfacial reaction between molten steel and the CaO–Al_(2)O_(3)–MgO flux causes the aluminum pick-up from the liquid slag into the steel melt, resulting in a decrease in the oxygen content in the steel. The aluminum originating from the slag modifies the pre-existing Mn-silicate inclusions into alumina-rich inclusions in the steel. Because the oxygen content in the steel decreases as it reacts with the CaO–Al_(2)O_(3)–MgO flux, the degree of supersaturation for alumina formation is too low to precipitate new-born alumina particles in the steel. By analyzing the population density function (PDF) results for inclusions, it can be observed that the growth of spinel-type inclusions occurs by the diffusion of aluminum and magnesium in the steel. On the other hand, the composition of the steel, as well as the evolution of inclusions, is negligibly changed when the CaO–SiO_(2)–MgO flux is added to the molten steel. Furthermore, the computational simulation for predicting the evolution of inclusions in molten steel during a continuous casting tundish process was carried out based on a refractory-slag-metal-inclusion (ReSMI) multiphase reaction model.
机译：在1773K的1773K中研究了中间包焊剂对杀死304（18％Cr-8％Ni）不锈钢的非金属夹杂物的演变的影响。钢水和CaO-Al_之间的界面反应（2 ）O_（3）-MGO通量使铝渣中的铝拾取到钢熔体中，导致钢中的氧含量降低。源自炉渣的铝改变了预先存在的Mn-硅酸盐夹杂物，进入钢中富含氧化铝的夹杂物。因为钢中的氧含量随着与CaO-Al_（2）O_（3）-MGO通量的反应而降低，所以氧化铝形成的过饱和度太低，不能沉淀出钢中的新出生的氧化铝颗粒。通过分析夹杂物的群体密度函数（PDF）结果，可以观察到尖晶石型夹杂物的生长通过钢中的铝和镁的扩散发生。另一方面，当将CaO-SiO_（2）-MGO通量添加到钢水中时，钢的组成以及夹杂物的演化可以忽略地改变。此外，基于耐火渣 - 金属夹杂物（Resmi）多相反应模型，进行了用于预测钢水过程中钢水中夹杂物的进化的计算模拟。

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