新一代β-Sialon复合MgAlON耐火材料抗渣及抗钢水性能

Resistance of β-Sialon bonded MgAlON refractory to corrosion of slag and molten steel

通过对β Sialon复合MgAlON材料的抗渣及抗钢水侵蚀性能的研究发现 ,该材料抗渣侵蚀性能较好 ,侵蚀机理为 β Sialon与MgAlON溶解于渣中并析出针状Sialon和近化学计量的镁铝尖晶石 ,同时渣向材料内部渗透。需要说明的是MgA lON在渣中的溶解低于β Sialon的溶解 ;钢水对试样的侵蚀程度较低。分析表明侵蚀过程主要是基质中β Sialon溶解 ,颗粒基本未变化 ,侵蚀后形成了薄薄的主要由尖晶石和Sialon及刚玉构成的反应层。

Behaviors of Sialon bonded MgAlON have been studied when exposed to slag and molten steel. The slag test showed that -Sialon bonded MgAlON has good slag resistance. The slag corrosion mechanism is as:β-Sialon and MgAlON dissolve in slag and crystallized out acerous Sialon and spinel with near stoicheome tric composition, and slag penetrated into the body of sample. Moreover, MgAlON dissolve in slag slowly than that of Sialon. Molten steel test suggested that Sialon bonded MgAlON has good resistance to corrosion of molten steel and corrosion occurred mainly due to the dissolution of β[WTXFZ] Sialon of matrix with results of a thin layer formation consisted of spinel, Sialon and corundum, instead of the dissolution of grain.