Co-Fe-Mo系新恒弾性合金モエリンバーの特性に及ぼすNiの影響について

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タイトル別名
  • Influence of Addition of Nickel on the Characteristics of “Moelinvar”, A New Elinvar Type Alloy of Cobalt, Iron and Molybdenum
  • Co-Fe-Moケイ シン コウ ダンセイ ゴウキン モエリンバー ノ トクセイ ニ オヨボス Ni ノ エイキョウ ニ ツイテ
  • Influence of Addition of Nickel on the Characteristics of “Moelinvar”, A New Elinvar Type Alloy of Cobalt, Iron and Molybdenum

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The influence of addition of 10, 20 and 30 per cent of nickel on the thermal expansion in the range from 20° to 50°C, the rigidity modulus at 20°C and its temperature coefficient in the range from 20° to 50°C of the alloys of cobalt, iron and molybdenum has been determined. The relations between those properties of nickel-added alloys and the concentrations are qualitatively similar to those in the case of the ternary alloy mentioned above, while with the addition of nickel, the minimum value of thermal expansion coefficient becomes smaller and the positive maximum value of the temperature coefficient of the modulus larger; the minimum value of expansion coefficient of 1.64×10−6 and the maximum value of positive temperature coefficient of the modulus of +71.7×10−5 were obtained with the alloy containing 7.5 per cent of cobalt, 1.5 per cent of molybdenum and 30 per cent of nickel. The addition of nickel affects these coefficients of the ternary alloy, as if cobalt can be substituted by nickel; that is, the composition, at which the expansion coefficient shows the minimum value and the temperature coefficient of the modulus the maximum positive value, shifts to the side of low cobalt content almost linearly with the increase of nickel content and finally reaches the same composition in the binary system of iron and nickel, quite molybdenum as in the case of the alloys of cobalt, iron and chromium and of cobalt, iron and vanadium. When the quantity of nickel is increased, the concentration range having the positive temperature coefficient of the modulus becomes wider, and the change of the latter corresponding to the change of the former becomes smaller, especially in the range containing higher molybdenum. Some elinvar-type alloys containing comparatively high molybdenum have values of rigidity modulus larger than 8×105 kg/cm2, showing an important characteristic for practical application.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (5), 308-311, 1960

    公益社団法人 日本金属学会

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