Abstract
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.
It was found that mechanical properties of the forged sintered steel of the density 7.80 g/cm3 almost reach the level of that of cast wrought materials.
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.
