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钼坩埚是冶炼稀土金属用的主要器件,由于冶炼介质和气氛的浸蚀,及其高温再结晶严重,使其高温强度降低,对钼坩埚的使用寿命和冶炼稀土金属产品的质量产生不利影响。钼坩埚的连续使用寿命平均为20天。稀土金属中钼杂质的含量应小于0.07％。以钼为基添加稀土氧化铈及其它微量元素制成的F4200J新材料,可使钼坩埚的耐蚀性能得到改善,高温强度得到提高,并延长钼坩埚的使用寿命,提高冶炼稀土金属产品的质量。
The molybdenum crucible is the main device for smelting rare earth metals. Due to the erosion of the smelting media and atmosphere and the severe recrystallization at high temperature, the molybdenum crucible reduces the high temperature strength and adversely affects the service life of the molybdenum crucible and the quality of the rare earth metal product. The average life of the molybdenum crucible is 20 days. The content of molybdenum impurities in rare earth metals should be less than 0.07%. The addition of molybdenum-based rare earth cerium oxide and other trace elements made of F4200J new material, the corrosion resistance of molybdenum crucible can be improved, high temperature strength is improved, and extend the service life of molybdenum crucible to improve the quality of smelting rare earth metal products .