低温焼結タングステン体について-4-W-Ni-P合金の機械的性質

概要

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For the improvement of mechanical properties of the sintered tungsten compact, the lowtemperature sintering of tungsten powders mixed with a small quantity of Ni-P alloy was investigated. The results obtained were as follows. (1) The maximum sintered density and maximum transverse rupture strength were obtained by the addition of Ni-P alloy with, 0.2-0.5% of Ni. (2) The grain size of the sintered compacts depends upon the quantity of Ni-P alloy and it was maximum at 0.5-1.0% of Ni. (3) The hardness increased as the quantity of Ni-P alloy increased, and also as the grain size became smaller. (4) In the case of 0.5μ tungsten powder, the transverse rupture strength had a maximum value at the sintering temperature of 1300-1400°C. (5) The maximum transverse rupture strength was obtained when 0.5μ tungsten-powder added with Ni-P alloy containing 0.2--1% Ni was sintered at 1300-1400°C.
社団法人粉体粉末冶金協会の論文