材料期刊网

<正> 非金属夹杂物影响Fe-Cr-Al电热合金的使用寿命,KANTHALA-1合金在1200℃下使用寿命为300h,其夹杂物金相评级为1.5;国产0Cr25A15合金在相同温度下使用只达180h,夹杂物金相评级为3.5级。电渣重熔0Cr25A15合金过程中非金属夹杂物的变化规律与许多因素有关,本试验在电制度不变的条件下着重研究渣制度和添加剂的影响,从而寻求降低合金中非金属夹杂物和提高使用寿命的途径。 试验采用100kg三相有衬电渣炉和单相电渣重熔炉双联冶炼工艺,主要工作在单相电渣炉上进行,结晶器内径为110—130mm,锭重20kg。 在锻材中部取样做化学分析和非金属夹杂物金相鉴定。再把锻材加工成直径0.8长340mm

The effect of the slag system and addtive, including alloying element and deoxidizer, on the non-metallic inclusion removal from the electrothermal alloy 0Cr25A15 in the process of the electroslag remelting has been examined. The choice of slag system containing RE, the addition of Al as deoxidizer and the use of consumable electrode free from Ti are found to be the favourable conditions for remelting technique.