熱膨脹係数の低いタングステン合金(第2報) : W-Ni-Fe焼結合金の機械的性質について
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概要
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In this paper, a study has been made of the phenomena which occur when W-Ni-Fe powder compacts containing W from 90 to 97% are sintered at various temperatures. Besides of density, electrical conductivity and hardness, the tensile properties were determined as a measure of workability for each alloy composition. Several results were obtained as follows.<BR>(1) When the composition is selected in such a way that Ni/Fe ratio is equal to 1, the alloy has the highest ductility.<BR>(2) The tensile properties of each W-Ni-Fe alloy depends greatly on the properties and structure of its own Ni-Fe matrix.<BR>(3) The cooling rate after sintering affects considerably on ductility of W-Ni-Fe alloys.<BR>By fast cooling, they become more ductile.<BR>These results were studied, in more detail, with the aids of X-ray and magnetic analysis, and microhardness measurement. On the basis of these data, several W-Ni-Fe alloys could be cold-rolled.
- 社団法人 粉体粉末冶金協会の論文