(東北大學(xué) 材料與冶金學(xué)院， 沈陽(yáng) 110004)
摘 要: 采用靜態(tài)熔滴法， 模擬高爐軟熔帶渣成分，研究了原位TiN/O′-Sialon復(fù)相材料的抗渣侵蝕性能并與其他材料進(jìn)行了對(duì)比。 采用X射線(xiàn)衍射儀分析殘?jiān)奈锵啵?對(duì)材料被侵蝕部位采用電子探針?lè)椒ㄟM(jìn)行顯微結(jié)構(gòu)觀(guān)察和元素分布分析，測(cè)量蝕損層的平均深度。 結(jié)果表明： 材料被侵蝕后結(jié)構(gòu)發(fā)生變化， 可大致分為渣帶、 滲透帶和未變帶； 隨材料中TiN含量的增加， 材料的蝕損深度減小， 渣帶和滲透帶變窄， 抗渣侵蝕性能增強(qiáng)； TiN/O′-Sialon的抗渣侵蝕性能優(yōu)于O′-Sialon和ZrO2/O′-Sialon； 隨侵蝕溫度升高、 侵蝕時(shí)間延長(zhǎng)和渣中FeO含量增大， 材料的蝕損深度增加， 其中侵蝕溫度的影響最為顯著。
關(guān)鍵字: 原位TiN/O′-Sialon材料； 高爐軟熔帶渣； 抗渣侵蝕性能； 蝕損深度
DUAN Pei-ning, JIANG Tao
（ School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract: Corrosion resistance to slag of in-situ TiN/O′-Sialon was investigated by means of static droplet method and was compared with that of other materials, under simulating conditions of BF cohesive zone slag. Phase composition of the residue slag was analyzed by X-ray diffraction. For corroded region of materials, microstructure, element distribution and corrosion depth were observed and determined by electro-probe microanalysis. The results show that after being corroded, the structure of TiN/O′-Sialon material is composed of slag zone, penetrated zone and unchanged zone. With the increasing TiN content in the material, corrosion depth decreases and both slag zone and penetrated zone narrow down, which implies an improved corrosion resistance to slag. TiN/O′-Sialon shows a more excellent corrosion resistance to slag compared with O′-Sialon and ZrO2/O′-Sialon. Corrosion depth i.e., corrosion extent of TiN/O′-Sialon increases with increasing corroding temperature, holding time and FeO content in slag. Among the three factors, corroding temperature exhibits more dramatic effect.
Key words: in-situ TiN/O′-Sialon; blast furnace cohesive zone slag; corrosion resistance to slag; corrosion depth
