METHOD OF THERMO-MAGNETIC TREATMENT OF ITEMS OUT OF ALLOYED DIE STEEL Russian patent published in 2010 - IPC C21D1/04 C21D9/22 

FIELD: metallurgy.

SUBSTANCE: item out of alloyed die steel is subject to magnetic treatment in constant magnetic field with strength not less 16.9×10⁵ A/m at temperature 20°C with number of cycles not less, than three and with conditioning for 2 minutes in each cycle; further item is subject to thermal treatment; also items are oriented across or along magnetic field.

EFFECT: increased reliability of dies out of complex alloyed steel by thermal treatment at presence of external magnetic field.

2 cl, 1 tbl, 1 ex