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Processing of five grades of sintered maraging steels containing 13% Cr, 9% Ni, 1% Ti and different quantities of Mo, Co is described. Variations of ageing temperatures and ageing holding times had resulted in choosing optimum regime of ageing f T=550℃, T=2.5 h. It allowed to receive mechanical properties of these steels like to them for compact steels; UTS=1200 MPa, EL=5.3%, RA=7%, and Charpy impact =1445 kJ/m2. X-ray analysis had shown phases Fe7Mo6, Fe2Mo in steels containing Co and decreasing of the period ’of or-phase lattice in these steels after ageing.
Processing of five grades of sintered maraging steels containing 13% Cr, 9% Ni, 1% Ti and different quantities of Mo, Co is described. Variations of aging and aging holding times were induced in optimum conditions of aging fT = 550 ℃, T = 2.5 h. It allowed to receive mechanical properties of these steels like to them for compact steels; UTS = 1200 MPa, EL = 5.3%, RA = 7%, and Charpy impact = 1445 kJ / analysis had shown phases Fe7Mo6, Fe2Mo in steels containing Co and decreasing of the period ’of or-phase lattice in these steels after aging.