超高密度焼結鋼の強度と破壊

概要

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The tensile, impact and fatigue properties, and the fracture mechanism of forged super-high-density sintered steels were investigated in comparison with those of conventional sintered steels and cast wrought steels.<BR>It was found that mechanical properties of the forged sintered steel of the density 7.80 g/cm<SUP>3</SUP> almost reach the level of that of cast wrought materials.<BR>Optical or scanning electron microscopic observation of fracture surfaces of the specimens proved that the fatigue process and the fracture mechanism of forged super-high-density sintered steels were similar to those of cast wrought steels while the fracture in the conventional low density sintered steels occurred along pores in the compacts.
社団法人粉体粉末冶金協会の論文