Cu-Co<SUB>2</SUB>Si合金の銅側状態図および析出硬化性について

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タイトル別名
  • On Copper-Side Phase Diagram and Precipitation Hardening Properties of Cu-Co<SUB>2</SUB>Si Alloys
  • Cu-Co2Si合金の銅側状態図および析出硬化性について
  • Cu-Co2Si ゴウキン ノ ドウガワ ジョウタイズ オヨビ セキシュツ コウカセイ ニ ツイテ

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The copper side phase diagram of the Cu-Co2Si alloys was determined and their precipitation hardening properties were studied. Specimens were prepared from vacuum melted alloys, using the mother alloy Co2Si and electrolytic copper. The results obtained were as follows: (1) The liquidus and the solidus in the phase diagram were determined by thermal analyses, and it was found that the alloys containing less than 5%Co2Si solidify as solid solution. The solid solubility of Co2Si in copper determined by metallography was as follows: 2.3% at 1050°C, 1.2% at 1000°C, and 1.0% at 850°C. (2) The optimum processes of heat-treatment to obtain the highest mechanical strength of the Cu-Co2Si alloys were solution treating for 1 hr at 1000°∼1050°C, and aging for 1 hr at 500°∼550°C. The Cu-Co2Si 4% alloy treated in this way showed the following properties. Tensile strength: 76.5 kg/mm2, elongation: 6%, Vickers hardness: 240, electrical conductivity: 48.5 I.A.C.S.%. (3) The configuration of added elements in the Cu-Co2Si 4% alloy was investigated by X-ray diffraction analyses. Co2Si phase was detected in both the as-cast and the as-aged specimens.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 26 (9), 570-575, 1962

    公益社団法人 日本金属学会

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