| 摘要 |
PURPOSE:To obtain the titled atomized iron powder by adjusting the contents of O, C, N, Mn, P and S to specified amounts or less, specifying the amount of powder having a specified grain size or below, and providing specified values of apparent density, green compacting density under a specified molding pressure and deflective strength of a green compact under a specified molding pressure. CONSTITUTION:The composition of iron powder is composed of, by weight, <0.25% O, <0.05% C, <0.005% N, <0.4% Mn, <0.05% P, <0.1% S and the balance Fe with inevitable impurities, and the contents of the impurities are restricted to specified values or less. The iron powder is regulated so that powder having <=45mum grain size occupies 10-50wt%, and 2-2.5g/cm<3> apparent density, >=6.7g/cm<3> green compacting density under 5t/cm<2> molding pressure and >=250kg/cm<2> deflective strength of a green compact under 4.2t/cm<2> molding pressure are provided. |
