(1. 上海大學(xué) 材料科學(xué)與工程學(xué)院 上海市鋼鐵冶金新技術(shù)開發(fā)應(yīng)用重點實驗室，上海 200072；
2. 上海特種鑄造工程技術(shù)研究中心，上海 201605)
摘 要: 使用BaZrO3坩鍋結(jié)合真空感應(yīng)加熱技術(shù)熔煉鈦含量66%(摩爾分?jǐn)?shù))的富鈦合金，通過宏觀顯微鏡、X射線衍射儀、掃描電子顯微鏡及電子耦合儀分析BaZrO3坩鍋與熔體接觸后的顯微組織及其組成元素(Ba，Zr和O)在合金中的熔解量；研究BaZrO3坩鍋剝落損毀及與鈦熔體界面反應(yīng)機(jī)理。結(jié)果顯示：BaZrO3坩鍋受熔體侵蝕層厚度約2000 μm，合金中鋯和氧含量隨著熔體與坩堝接觸時間增加而增加。界面反應(yīng)產(chǎn)物BaO與空氣中水分和CO2反應(yīng)生成BaCO3，晶體體積變化破壞晶粒間結(jié)合力，導(dǎo)致坩堝剝落損毀。富鈦熔體對BaZrO3耐火材料的溶解侵蝕是坩堝受損的主要原因。
關(guān)鍵字: BaZrO3耐火材料；富鈦合金；侵蝕；界面反應(yīng)
（1. State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
2. Shanghai Special Casting Engineering Technology Research Center, Shanghai 201605, China）
Abstract:The titanium enrichment (66%, mole fraction) alloy was melted in the BaZrO3 crucible to investigate the crucible damage and erosion mechanism. By the optical microscopy, scanning electron microscopy, X-ray diffractometry and atomic emission spectrometry, the microstructure and the dissolution of BaZrO3 refractory after contacting the melt with different time were studied. The results show that the thickness of erosion layer of the BaZrO3 crucible is measured as about 2000 μm. The Zr and O elements contents in the alloys increase with rising the contacting time. The damage of BaZrO3 crucible is caused by the changing of crystal volume, as the BaO transforms into BaCO3. The main mechanism responsible for the erosion of BaZrO3 crucible is the dissolution of BaZrO3 refractory in the titanium enrichment melt.
Key words: BaZrO3; refractory; enrichment titanium alloys; erosion; interfacial reaction
