【摘要】 <正> 一、试验条件 1.原材料:金属炉料为南京铁合金厂生产的ZL102合金锭,稀土是长春应用化学研究所采用江西龙南主产的含Y₂O₃为69.0％的富钇稀土氧化物加工的铝-富钇稀土中间合金。 2.设备:用5、30、50公斤容量的电阻坩埚炉熔化合金,机械性能试棒在WE-10A型液压式万能材料试验机上拉伸。 3.操作过程:合金在750～760℃加铝—富钇稀土中间合金,降温到700—720℃用氮—氟利昂12混合气体精炼,710～720℃浇注。拉力试棒及化学分析试样均用金属型浇注,金属到温度200～250℃;金相试样中12×40～50,砂型浇注。拉力试棒每炉浇6根,重复两次。更多还原

【Abstract】 In the paper, the role of rich-Y rare earth in the modification of ZL102 alloy has been introduced. The optimum amount of rare earth added to the alloy and the influence of holding time and remeltiagstimes on the modification has ceen discussed.lt has been point out that rich-Y rare earth has an excellent modifying effect on ZL102 alloy, there will still be a good effect of modification after holding time as long as 4 hours and remelt times as high as 9. After adding rich-Y rare earth, no manifest changes in the casting properties of the alloy has been observed.更多还原