METHOD OF HEAT TREATMENT OF STRUCTURAL COMPONENT OUT OF HARDENED HEAT RESISTANT STEEL AND STRUCTURAL COMPONENT OUT OF HARDENED HEAT RESISTANT STEEL Russian patent published in 2009 - IPC C23C8/38 C21D9/40 C23C14/46 

FIELD: metallurgy.

SUBSTANCE: invention refers to heat treatment. The structural component out of hardened heat resistant steel is subject to heat treatment consisting in hardening of structural component, in tempering of its boundary layer, in quenching and in additional low temperature cooling; also hardening of the structural component and plasma-ion tempering of the boundary layer are carried out per one production stage by means of heating of the structural element to common temperature of hardening and diffusion T_h+d above upper critical temperature Ac₃, further holding is performed at this temperature till complete austenisation and release of contained carbon and also till desired saturation of boundary layer with a diffusion element.

EFFECT: production of structural component possessing high strength, toughness, higher hardness of boundary layer and therefore with higher fatigue limit.

13 cl, 3 dwg