鉄焼結材の内部摩擦(第2報) : 成形および焼結条件による影響

概要

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This investigation is carried out to examine the influence of compacting and sintering conditions on internal friction of sintered iron materials as compared with the density and the tensile strength. The results are as follows. Internal friction becomes small with the increase of compacting pressure, because the density be comes large. δ of the material sintered at temperature higher than 1000°C is expressed by δ=3.4 × 102ρ-2.7T-1, where ρ the density (g/cm3) and T the sintering temperature (°C). Internal friction also becomes small with the increase of sintering time, because the density and the grain size become large. Internal friction of sintered material in nitrogen gas is small as compared with that of sintered material in vacuum or hydrogen gas. Internal friction becomes small as copper or nickel powder is added to iron powder.
社団法人粉体粉末冶金協会の論文