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通过观察损毁样品的侵蚀和渗透情况,研究浇铸TRIP钢时保护渣对ZrO2-C渣线材料的侵蚀机制。ZrO2及其稳定剂CaO的侵蚀溶解是渣线材料侵蚀的决定因素。氧化是石墨损毁的主要方式,石墨在钢水里的溶解对其损毁不起重要作用。ZrO2溶解量和石墨氧化量的比值随着热面到钢水垂直距离的减少而减少。然而,与其他炼钢用碳结合耐火材料不同,在本研究的特殊情况下,石墨被保护渣浸润,它仍然充当耐火成分,但仅部分作为抗渣渗透剂。渣渗透后,ZrO2开始被侵蚀,降低了抗渣侵蚀性,然而渣中成分的气相传输可能导致CaO在未渗透区域脱溶。
By observing the erosion and infiltration of the damaged samples, the erosion mechanism of slag on the ZrO2-C slag line was studied when casting TRIP steel. Erosion and dissolution of ZrO 2 and its stabilizer CaO are the determinants of slag line erosion. Oxidation is the main way of graphite damage, graphite dissolution in the molten steel can not play an important role in its damage. The ratio of ZrO2 dissolution to graphite oxidation decreases with decreasing vertical distance from hot face to molten steel. However, unlike other carbon-bound refractories for steel-making, graphite is infiltrated with mold powder in the special case of this study. It still acts as a refractory component, but only partially as a slag-resistant penetrant. After the slag infiltrates, ZrO2 begins to be eroded, reducing the slag erosion resistance, however, the gas phase transport of the components in the slag may cause the CaO to be desolvated in the non-permeate area.