IRON BASE POWDER, METHOD FOR MAKING SINTERED ARTICLE AND SINTERED ARTICLE MADE BY SUCH METHOD Russian patent published in 2003 - IPC

FIELD: powder of alloyed steel with low content of oxygen and carbon, method for making sintered articles and sintered articles. SUBSTANCE: sintered article having tension strength 750 MPa is made by pressing water-sprayed annealed iron base powder containing (mass%): chrome, 2.5 - 3.5; molybdenum, 0.3 - 0.7; manganese, 0.09 - 0.3; copper, less than 0.10; nickel, less than 0.15; phosphorus, less than 0.02; nitrogen, less than 0.01; vanadium, less than 0.10; silicon, less than 0.10; tungsten, less than 0.10; oxygen, less than 0.25; carbon, less than 0.01; inevitable impurities, less than 0.5; iron - the balance under pressure equal at least to 600 MPa; subjecting pressed body to sintering at temperature no more than 1220 C. EFFECT: high mechanical properties of articles, lowered cost for making them. 12 cl, 1 dwg, 4 tbl, 2 ex