帯熔融精製銅の引張試験と常温再結晶

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タイトル別名
  • Tensile Tests and Room Temperature Recrystallization of Zone-Melted Copper (Study of Zone-Refined High Purity Copper, 2nd Report)
  • タイヨウユウセイセイ ドウ ノ ヒッパリ シケン ト ジョウオン サイケッショウ

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抄録

The tensile properties and microscopic structures were investigated with copper wires prepared from zone-refined ingot by 16 passes through the molten zones, by drawing of 99% reduction. The results obtained were as follows: (1) Large recrystallized grains were observed in the refined portions aged at room temperature, but no recrystallization was observed in the impurity-concentrated portions, crude copper, and commercial vacuum-melted copper. (2) According to the progress of recrystallization, remarkable reductions in ultimate tensile strength and micro-Vickers hardness values were also observed in the refined specimens aged at room temperature; these reductions are in clear relations with the decrease in the impurity content resulting from zone melting. (3) It has been found that the half-annealing time of the most refined specimen was much shorter than that of OFHC and almost similar to that of the spectroscopically pure copper (99.999%). Accordingly, the measurement of half annealing time may be one of the valuable methods to estimate the purity of copper.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (11), 744-748, 1960

    公益社団法人 日本金属学会

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