METHOD FOR HEAT TREATMENT AND MECHANICAL WORKING OF MARAGING STEELS Russian patent published in 1995 - IPC

FIELD: heat treatment and mechanical working of materials. SUBSTANCE: method for heat treatment and mechanical working of maraging steel includes α-solution hardening of maraging steel at 950-1000 C, cold cross-rolling with total reduction of 40-60%, age hardening under reageing conditions at 545-555 C for 3.8-4.2 h, and final heat treatment under conditions of partial austenization at 565-575 C for 0.8-1.2 h. Such sequence of process procedures makes it possible to raise residual induction and coercive force of BKC-21-(H18K9M5T) alloy by about three times and maximum induction by two times at tensile strength of above 1800 MPa and convention yield limit of above 1500 MPa. EFFECT: optimal combination of magnetic hysteresis and strength characteristics of maraging steels for use as semisolid magnet. 1 dwg, 1 tbl