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2 176 674

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IPC

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Application

2001105859/02, 2001-03-01

(24)

Start date

2001-03-01

(22)

Actual filing date

2001-03-01

(45)

Published

2001-12-10

(72)

Inventor

Azbukin V.G.Bashaeva E.N.Karzov G.P.Kudrjavtseva I.V.Pavlov V.N.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Tsentral'Nyj Nauchno-Issledovatel'Skij Institut Konstruktsionnykh Materialov

METHOD OF HEAT TREATMENT OF HIGH-STRENGTH CORROSION-RESISTANT CHROMIUM-NICKEL MARTENSITIC STEELS Russian patent published in 2001 - IPC

Abstract RU 2176674 C1

FIELD: heat treatment of heavy ingots and blanks from martensitic steels used in atomic power, shipbuilding and chemical engineering. SUBSTANCE: hardening from temperatures of 1050-1080 C to temperature of ((M_H)+100) ± 10 C is performed at rate not below critical level; then article is kept in furnace at this temperature for equalizing temperature over entire section of article, after which it is cooled in air to temperature of (M_K+(M_H•M_K)/3)±10^°C and then immediately subjected to high-temperature tempering to A_c1+(20-50)^°C and cooling to temperature of M_K followed by repeated high-temperature tempering for at least once. EFFECT: enhanced ductility , impact resistance, resistance to corrosion cracking and intercrystalline corrosion ensuring homogeneity of properties over section of heavy blanks; reduced level of residual stresses. 1 dwg, 1 tbl

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RU 2 176 674 C1

Authors

Azbukin V.G.

Bashaeva E.N.

Karzov G.P.

Kudrjavtseva I.V.

Pavlov V.N.

Dates

2001-12-10—Published

2001-03-01—Filed