Raising the ageing temperature will increase the conductivity, and for the hardness of the alloy there is an optimum value of this temperature.
时效温度增加，合金的导电率提高，但对合金硬度的影响有个最佳值。
The proper Rare Eatth content added and ageing temperature increased improve conductivity of the alloy, and the effect of ageing temperature on hardness has an optimum value.
提高时效温度，可提高合金的导电率，但对合金硬度的影响有个最佳值。
The mathematical model was established for calculating the maximum reaction rate of ammonia synthesis at optimum reaction temperature and the value solution method for the model was presented.
建立了计算最佳温度下的氨合成最大反应速率模型，提出了模型的数值解方法；
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