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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Y_2O_3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。
First, the test conditions 1 raw materials: metal charge for the Nanjing ferroalloy plant production ZL102 alloy ingots, rare earth Changchun Institute of Applied Chemistry, Jiangxi Longnan main production containing Y_2O_3 of 69.0% Yttrium-rich rare earth oxide-rich yttrium-rich yttrium Rare earth intermediate alloy. 2. Equipment: 5,30,50 kilograms of resistance crucible furnace melting alloy, mechanical properties of the rod in the WE-10A hydraulic universal testing machine stretched. 3. Operation process: The alloy is added with aluminum-rich yttrium rare earth master alloy at 750-760 deg.C, cooled down to 700-720 deg.C and refined with nitrogen-freon 12 mixed gas and poured at 710-720 deg.C. Tensile test bars and chemical analysis of the sample are cast with a metal type, metal to a temperature of 200 ~ 250 ℃; metallographic sample 12 × 40 ~ 50, sand casting. Tensile test rods poured 6 per furnace, repeated twice.