@article{oai:jaxa.repo.nii.ac.jp:00031808,
 author = {村川, 潔 and 松岡, 輝雄 and MURAKAWA, Kiyoshi and MATSUOKA, Teruo},
 issue = {2_A},
 journal = {東京大学宇宙航空研究所報告},
 month = {Apr},
 note = {ベリリゥム銅25合金(Be 2.0%, Co 0.2%)および10合金(Be 0.2%, Co 2.0%)の板ばね特性(KbとE)をジーメンス型のばね板試験機で測定した.25合金の板を300～350℃で時効すると大きなKb,値が得られることは以前の&lrtri;θ_<30>の測定の結果と一致する.10合金の板は375～475℃で時効すると他の優秀な銅合金ばねと同じ程度のKb,が得られる;最適時効温度は圧延度によって左右される.光学顕微鏡でしらべた範囲では,溶体化処理をしてから250℃で1hr時効した25合金は結晶粒界でγ相の析出は明らかに見られるが,γ'相の析出は検出することができなかった.この試料は300℃より高い温度で時効すると粒界析出はもちろん粒内析出がはっきり見られる; これはよく知られた事実である.10合金は,どんな温度で時効しても,γ'相の析出を光学顕微鏡で検出することはできなかった.25合金および10合金の高温度におけるVHNを測定した.10合金ではおよそ570℃になってもまだ100の硬さを保っていることがわかった., The spring characteristics (Kb and E) of strips of 25 alloy (Be 2.0%, Co 0.2%) and 10 alloy (Be 0.2%, Co 2.0%) were measured by means of a Siemens-type strip-spring tester. In agreement with the previous result of the measurement of &lrtri;θ_<30>, strips of 25 alloy showed large values of Kb, when they were aged at about 300-350℃. Strips of 10 alloy showed values of Kb, comparable with other good copper-base springstrips, when they were aged at 375-475℃, the optimum temperature depending on the reduction by rolling. Observation with an optical microscope showed that in the 25 alloy that was solution-treated and aged at 250℃ for 1 hr precipitation of the γ-phase (discontinuous precipitation) could be clearly seen at the grain-boundary, although no γ'-phase could be detected; this sample, when aged for 1 hr at a temperature higher than 300℃, showed marked intergranular as well as grain-boundary precipitations, a phenomenon which is well known. In the 10 alloy no clear precipitation of the γ'-phase could be detected with an optical microscope, at whatever temperature it was aged. The hightemperature VHN of these alloy were measured; it was found that the 10 alloy retains the hardness of 100 up to about 570℃., 資料番号: SA0124861000},
 pages = {476--487},
 title = {ベリリゥム銅合金板のばね特性},
 volume = {2},
 year = {1966}
}