LOW-ALLOY STEEL POWDER Russian patent published in 2013 - IPC C22C33/02 B22F1/00 B22F3/12 

FIELD: metallurgy.

SUBSTANCE: pre-alloyed steel powder sprayed with water contains the following, wt %: 0.2-1.5 Cr; 0.05-0.4 V; 0.09-0.6 Mn; less than 0.1 Mo; less than 0.1 Ni; less than 0.2 Cu; less than 0.1 C; less than 0.25 O; less than 0.5 of inevitable impurities and iron is the rest. Powder composition for obtaining sintered parts contains steel powder mixed with 0.35-1.0 wt % of graphite, 0.05-2.0 wt % of lubricating substances, optionally with copper additive in the quantity of up to 4 wt %, and optionally with solid-phase materials and agents improving processibility. The composition is pressed at the pressure of 400-2000 MPa, sintered at 1000-1400°C, and when required, subject to hot forging at the temperature of more than 500°C or heat treatment.

EFFECT: improving operating characteristics.

17 cl, 2 tbl, 1 ex