METHOD FOR PRODUCTION OF HIGH-STRENGTH STEEL PRODUCTS Russian patent published in 2012 - IPC C21D8/00 C21D8/02 C22C38/44 C22C38/54 

Abstract RU 2442830 C1

FIELD: metallurgy.

SUBSTANCE: The invention relates to metallurgy. The result is achieved by producing the rough piece, deforming it in the temperature range from 1050-1150°C to 850-900°C, its normalization or hardening at the temperature of 850-950°C, relieving at 400-600°C. The rough piece is produces from a steel with the following chemical composition, %: 0,3-0,6 C; 0,6-1,4 Mn; 0,1-0,3 Si; 1,0-1,4 Cr; 0,6-2,8 Ni; 0,03-0,85 Cu; 0,3-0,6 Mo; 0,10-0,16 V; 0,05-0,10 Nb; 0,01-0,08 Ti; 0,02-0,08 Al; 0,002-0,010 B; less than 0,010 S; less than 0,015 P; rest - Fe. To ensure the temporal resistance to breakage of 1450-1500 N/mm2 and impact resilience KCV+20 of at least 20 J/cm2 the rough piece is relieved at the temperature below 500°C, and to ensure the temporal resistance to breakage of 1350-1500 N/mm2 and impact resilience KCV+20 of at least 30 J/cm2 the rough piece is relieved at the temperature of at least 500°C.

EFFECT: improvement of numerous mechanical properties of steel products and increase of production yield.

2 cl, 1 ex, 2 tbl

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RU 2 442 830 C1

Authors

Vol'Shonok Igor' Zinov'Evich

Torshin Viktor Timofeevich

Nikitin Valentin Nikolaevich

Shljamnev Anatolij Petrovich

Filippov Georgij Anatol'Evich

Nikitin Mikhail Valentinovich

Masljuk Vladimir Mikhajlovich

Trajno Aleksandr Ivanovich

Rusakov Andrej Dmitrievich

Dates

2012-02-20Published

2010-10-08Filed