Cu-Co<SUB>2</SUB>Si合金の高温電気抵抗，高温硬さおよび溶体化処理における臨界冷却速度

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  • The Electrical Resistivity at High Temperature, Critical Cooling Rate on Solution Treatment, and Vickers Hardness at High Temperature of Cu-Co<SUB>2</SUB>Si Alloys
  • Cu-Co2Si合金の高温電気抵抗,高温硬さおよび溶体化処理における臨界冷却速度
  • Cu-Co2Si ゴウキン ノ コウオン デンキ テイコウ , コウオン カタサ オヨビ ヨウタイカ ショリ ニ オケル リンカイ レイキャク ソクド

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抄録

The electrical resistivity at high temperature, the effects of cooling rate on the formation of supersaturated solid solution, and the Vickers hardness at high temperature for the Cu-Co2Si alloys were investigated. The results obtained were as follows. (1) A self-recording apparatus was used to measure the electrical resistivity of the Cu-Co2Si alloys between room temperature and 600°C. No discontinuous change was found, but smooth changes representing continuous precipitation were observed. (2) In order to find out the critical cooling rate in the solution treatment for the Cu-Co2Si 4% alloy, C curves were determined by isothermal treatment and aging. The nose of C curve was located at about 950°C. The supersaturated solid solution of this alloy was obtained at room temperature, when the cooling rate between 1000°C and 800°C was higher than 20°C/sec. (3) Vickers hardness measurement at high temperature were made on various copper alloys i.e. tough pitch copper, Cu-Cd, Cu-Ag, Cu-Cr, and Cu-Co2Si alloy. The Cu-Co2Si 2.8% and 3.6% alloys showed the highest hardness value of about 95°C among those copper alloys at 500°C, and this value is nearly equal to that of room temperature hardness of quarter-hardened tough pitch copper.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 26 (9), 576-579, 1962

    公益社団法人 日本金属学会

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