抄録
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.
(1) When the composition is selected in such a way that Ni/Fe ratio is equal to 1, the alloy has the highest ductility.
(2) The tensile properties of each W-Ni-Fe alloy depends greatly on the properties and structure of its own Ni-Fe matrix.
(3) The cooling rate after sintering affects considerably on ductility of W-Ni-Fe alloys.
By fast cooling, they become more ductile.
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.
