METHOD FOR HIGH-STRENGTH AUSTENITIC STEEL PROCESSING Russian patent published in 2012 - IPC C21D8/00 C21D6/04 C21D6/00 B82B3/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, more particularly, to methods for high-strength austenitic steel processing and may be used, for instance, for producing high-loaded parts in mechanical engineering. The method includes melting of austenitic steel which contains the components at the following ratio, wt %: carbon 5.0-16.0; chromium 12.0-17.0; nickel 5.0-16.0; titanium 0.4-2.5; aluminium 0.1-2.5; manganese up to 0.3; silicon up to 0.3; copper up to 0.2; sulfur up to 0.03; phosphorus up to 0.03; with the remainder comprising iron and unavoidable impurities; with the following condition to be fulfilled: the sum of chromium and nickel is 16.0-30.0, and the sum of titanium and aluminium is 0.6-3.5; quenching of parts, plastic deformation at gryogenic temperatures in several stages, low temperature tempering upon each stage and high temperature tempering and ultra-sonic treatment within the range of working frequencies f=23-25 kHz.

EFFECT: nanostructured high-strength austenitic steel which provides high magnetic rigidity and high residual magnetic induction with preserving satisfactory material plasticity may be received.

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