ニッケルを含む銅-ベリリウム合金の溶体化処理温度，冷間加工と時効特性

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  • Aging Behaviour of Be-Cu Alloys, Containing Ni with Special Emphasis on its Relation to Solution-treatment and Cold-working
  • ニッケル オ フクム ドウ-ベリリウム ゴウキン ノ ヨウタイカ ショリ オンド , レイカン カコウ ト ジコウ トクセイ

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The effects of the temperature of solution-treatment (700∼850°) as well as cold-rolling prior to aging treatment (30 and 80% in reduction percentage) on the aging characteristics of Be-Cu alloys, containing a small amount of Ni between 150° and 550°C were investigated by measuring the hardness and observing the microstructure. A lowering of the temperature of solution-treatment remarkably reduced he velocity and the degree of age-hardening, but the change in aging curves at the respective temperatures was found not to be in proportion to the change of quenching temperature. Cold-working generally reduced the degree of age-hardening, and especially such discontinuous changes as abnormal softening or two-steps hardening have been observed at about 250∼350°C. The rate of hardening was greater in as cold-worked specimens than as-quenched ones, in the range of low-temperature aging, but it became obscure at higher aging temperatures owing to the abnormal change mentioned above. The results were discussed in relation to the microstructures observed.

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