NANOCRISTALLINE MATERIAL WITH AUSTENIC STEEL STRUCTURE POSSESSING HIGH FIRMNESS, DURABILITY AND CORROSIVE ENDURANCE, AND ITS PRODUCTION METHOD Russian patent published in 2008 - IPC C22C33/02 B22F1/00 C22C1/10 B82B1/00 B82B3/00 

FIELD: metallurgy, nanotechnologies.

SUBSTANCE: invention pertains to the powder metallurgy; in particular, to nanocristalline material with an austenic steel structure, including its production method. The nanocristalline material is obtained as an aggregate made from the austenic nanocristalline crystal grains, containing more than 0.4 to 2.0 mass % of nitrogen in a solid solution. Small grain powder of the steel components, such as iron, chromium, nickel, manganese and carbon, must be mixed with the substance - source of nitrogen. The mixture obtained as a result is subjected to a mechanical alloying inside a centrifugal mill, resulting in procurement of small grain powders of the nanocristalline austenic steel containing a high nitrogen percentage. Steel is further subjected to a sintering treatment using one or more methods from the group which includes cogging, electrodischarge sintering, extrusion, hot isostatic pressing, cold pressing, hot pressing, forge work, stamping or stamping by means of an explosion. The material obtained possesses high endurance, firmness, corrosive resistance and is very suitable for plastic working.

EFFECT: procurement of the nanocristalline material with an austenic steel structure that possesses high endurance and corrosive resistance.

103 cl, 13 dwg, 8 tbl, 16 ex