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一、引言含Be小于1％的二元Cu—Bc合金,尽管有良好的导电性,但不会出现明显的时效硬化。商品Cu—Be合金C17510和C17500,分别含有第三元素Ni或Co,它们使三元合金的强度大大地超过二元合金而不降低材料的导电性和导热性。近来,有人指出:添加Ni使亚稳析出物固溶温度高于相应的二元Cu—Be合金。固溶温度移向较高值,使固溶退火和淬火状态下溶质在固溶体中达到更高的过饱和,增加了析出的驱动力。由于
I. INTRODUCTION Binary Cu-Bc alloys containing less than 1% Be, with good electrical conductivity, do not exhibit significant age-hardening. Commodities Cu-Be alloy C17510 and C17500, respectively, containing the third element Ni or Co, which make ternary alloy strength greatly exceeded the binary alloy without reducing the conductivity and thermal conductivity of the material. Recently, it has been pointed out that the addition of Ni causes the metastable precipitates to have a higher solution temperature than the corresponding binary Cu-Be alloy. The solution temperature moves to a higher value, so that the solute in solution annealing and quenching state to achieve higher supersaturation in the solid solution, increasing the driving force of precipitation. due to