EP 4257717 A1 20231011 - HIGH-ENTROPY AUSTENITIC STAINLESS STEEL, AND PREPARATION METHOD THEREFOR
Title (en)
HIGH-ENTROPY AUSTENITIC STAINLESS STEEL, AND PREPARATION METHOD THEREFOR
Title (de)
HOCHENTROPISCHER AUSTENITISCHER EDELSTAHL UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE HAUTE ENTROPIE ET SON PROCÉDÉ DE PRÉPARATION
Publication
Application
Priority
- CN 202111396824 A 20211123
- CN 2022128626 W 20221031
Abstract (en)
The invention discloses high-entropy austenitic stainless steels and their preparation methods in the technical field of stainless steel materials. The elemental composition of the stainless steels developed by the invention is as follows: Cr: 5 - 30%; Ni: 5 - 50%; Ti: 1 - 15%; Al: 1 - 15%; the rest are Fe and inevitable impurities; preferably, the composition is Cr: 5 - 19%; Ni: 5 - 29%; Ti: 6 - 15%; Al: 5 - 15%; the rest element is Fe. By adjusting the atomic ratio of each element, the nano-sized precipitates are generated as much as possible, and the strength is maximized while maintaining a high plasticity. The stainless steels provided by this invention have only five alloying components, a low manufacturing cost, and high-strength and high-plasticity. They can be widely used in many industrial fields such as aviation, aerospace, marine, and nuclear power with broad market prospects.
IPC 8 full level
C22C 33/06 (2006.01); C22C 30/00 (2006.01)
CPC (source: CN EP KR US)
B21B 3/02 (2013.01 - CN KR US); C21D 1/26 (2013.01 - EP KR); C21D 1/60 (2013.01 - EP KR); C21D 1/76 (2013.01 - EP KR); C21D 6/004 (2013.01 - CN EP KR); C21D 8/021 (2013.01 - EP KR); C21D 8/0226 (2013.01 - EP KR); C21D 8/0236 (2013.01 - EP KR); C21D 8/0273 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP KR); C22C 1/02 (2013.01 - KR US); C22C 30/00 (2013.01 - KR US); C22C 33/04 (2013.01 - CN EP KR); C22C 38/06 (2013.01 - CN EP KR); C22C 38/50 (2013.01 - CN EP KR); C22F 1/002 (2013.01 - US); C22F 1/16 (2013.01 - US); C21D 2211/001 (2013.01 - EP KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4257717 A1 20231011; CN 115141984 A 20221004; CN 115141984 B 20230224; JP 2024504210 A 20240130; KR 20240114695 A 20240724; US 2024093339 A1 20240321; WO 2023093464 A1 20230601
DOCDB simple family (application)
EP 22897547 A 20221031; CN 202111396824 A 20211123; CN 2022128626 W 20221031; JP 2023563148 A 20221031; KR 20237020901 A 20221031; US 202218271916 A 20221031