TiN inclusions are known to exacerbate slag rimming and nozzle clogging during continuous casting of Ti‐bearing steels. Herein, the effect of TiO₂ and TiN on the viscosity and fluidity of a fluorine‐free (F‐free) mold flux, as well as the corresponding precipitated crystalline phase is studied. Higher TiO₂ is found to lower the viscosity and increase the strip length of the molten slag at TiO₂ contents less than 10 wt%, whereas the viscosity increases suddenly and the strip length decreases rapidly at TiO₂ contents above 10 wt%, due to the precipitation of CaTiO₃ crystals, resulting in a solid–liquid coexisting melt. TiN has a low solubility in F‐free mold fluxes without MnO additions, and TiN is distributed in the molten slag as solid particles. TiN addition significantly increases the viscosity and shortens the strip length of the molten slag. On the other hand, F‐free mold fluxes containing MnO dissolves TiN into the molten slag through the oxidization of TiN to TiO₂. However, beyond the solubility limit of TiN in fluorine‐free mold fluxes containing 5 wt% MnO, excess TiN is not completely dissolved. Then, the precipitation of Ca₂Ti₂O₆ crystals is promoted.

中文翻译：

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TiO2和TiN对铸造含钛钢无氟保护渣的粘度，流动性和结晶的影响

众所周知，TiN夹杂物会在连续铸造含钛钢的过程中加剧炉渣边缘和喷嘴堵塞。在此，研究了TiO ₂和TiN对无氟（F-）模具熔剂的粘度和流动性以及相应的沉淀结晶相的影响。更高的TiO ₂被发现降低粘度和提高熔融炉渣的带材长度的TiO _2分含量小于10重量％，而突然的粘度增加，并且条带长度处的TiO迅速减小_2分10重量％的含量以上时，由于CaTiO ₃的沉淀晶体，形成固液共存的熔体。TiN在不含F的保护渣中不含MnO的情况下溶解度低，并且TiN作为固体颗粒分布在熔融炉渣中。TiN的添加显着增加了粘度，并缩短了熔渣的带钢长度。另一方面，含有MnO的无F型熔剂通过TiN氧化成TiO ₂将TiN溶解到熔渣中。但是，超出TiN在含5％MnO的无氟铸模助熔剂中的溶解度极限时，过量的TiN不会完全溶解。然后，促进了Ca ₂ Ti ₂ O ₆晶体的沉淀。