【摘要】 在高温纯铁熔体中加入平均尺寸为2.7μm的TiN颗粒,熔炼后得到铸锭试样。用扫描电镜(SEM)及能谱(EDS)研究了铸锭金相试样及电解分离出来的非金属夹杂物的形貌、大小及组成。结果显示夹杂物中存在较多的含Ti夹杂,在部分含Ti夹杂物的表面发现有MnS夹杂物,呈白色点状分布或包覆于颗粒表面;另有部分TiN颗粒与熔体中的夹杂物发生了机械复合,形成相界面清晰的复合夹杂物。并从理论上分析了TiN颗粒在纯铁熔体中的热力学稳定性。更多还原

【Abstract】 The ingot specimen was obtained by melting industrial pure iron in which TiN particle with 2.7 μm size was added.The existent state and chemical component of nonmetallic inclusions in the metal-phase sample were investigated with SEM and EDS.The characteristic of nonmetallic inclusions extracted from ingot by the electrolytic method in the nonaqueous solution,such as morphology,size and chemical component,were studied with SEM and EDS.Experimental results show that there were high Ti contain in inclusions.There were a lot of white punctate MnS inclusions at some surface of Ti inclusions.Some TiN particle combined automatically with the inclusion in the molten.At last,the thermodynamic stability of TiN particle in molten pure iron was analyzed.更多还原