TREATMENT METHOD OF HEAT-RESISTANT MARTENSITE STEEL Russian patent published in 2019 - IPC C21D6/00 C21D8/00 C22C38/54 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to processing of heat-resistant martensite alloys used in power industry as structural materials for production of boilers, rotors and other equipment of new generation thermal power plants operating at temperature of up to 650 °C. Method comprises holding steel in an austenite region at temperature of 1,040–1,100 °C with subsequent cooling in air, tempering at temperature of 760-780°C and thermomechanical treatment. Thermomechanical treatment consists in deformation from 0.5 to 2 % at temperature in interval ±100 °C near operation temperature with speed of 10^-3 up to 10^-6 s^-1. When making pipes, deformation during thermomechanical treatment is performed by way of straightening, and during blades production calibration is used.

EFFECT: disclosed is a method of processing heat-resistant martensite steel.

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