Abstract: The invention concerns a sintered metal part which has a densified surface and sintered density of at least 7.35 g/cm3 and a core structure distinguished by a pore structure obtained by single pressing to at least 7.35 g/cm3 and single sintering of a mixture of a coarse iron or iron-based powder and optional additives.

Abstract: The invention relates to a method consisting of the steps of providing a pre-alloyed iron-based metal powder comprising at least 1.3-3.5% chromium, 0.15-0.7% molybdenum, manganese and unavoidable impurities, mixing said powder with 0.1-1.0% graphite, compacting the obtained mixture at a pressure of at least 600 MPa, sintering the compacted part in a single step at a temperature above 1100° C., shot-peening the part and after sintering optionally hardening the component. The invention also relates to a powder metallurgical part and use of a low chromium prealloyed powder for preparing notched sintered parts having a bending fatigue limit of at least 340 MPa at a sintered density of 7.15 g/cm3, preferably at least 400 MPa at a sintered density of 7.3 g/cm3.

Abstract: The invention concerns a sintered metal part which has a densified surface and sintered density of at least 7.35 g/cm3 and a core structure distinguished by a pore structure obtained by single pressing to at least 7.35 g/cm3 and single sintering of a mixture of a coarse iron or iron-based powder and optional additives.