EP 2112237 A1 20091028 - Development of a very high resistance to sensitization in austenitic stainless steel through special heat treatment resulting in grain boundary microstructural modification
Title (en)
Development of a very high resistance to sensitization in austenitic stainless steel through special heat treatment resulting in grain boundary microstructural modification
Title (de)
Entwicklung einer sehr hohen Widerstandsfähigkeit von austenitischem Edelstahl durch spezielle Wärmebehandlung als Ergebnis einer mikrostrukturellen Korngrenzenänderung
Title (fr)
Développement très d'un de haute résistance à la sensibilisation en acier inoxydable austénitique par le traitement thermique spécial ayant comme résultat la modification microstructurale de joint de grain
Publication
Application
Priority
IN 893MU2008 A 20080421
Abstract (en)
Process for achieving enhanced sensitization resistance as measured by degree of sensitization (DOS) which is reverse of resistance sensitization and having value of 0.02 to 2.72 %, depending upon the types of austenitic stainless steel in austenitic stainless steel by modifying the initial microstructure of the stainless steel through specific heat treatment without involving mechanical treatment. The process comprises exposing wrought stainless steel to specific heat treatment at the temperature range of 1100-1250°C for 30 minutes to two hours and cooling to room temperature.
IPC 8 full level
C21D 8/02 (2006.01); C21D 6/00 (2006.01); C22C 38/18 (2006.01); C22C 38/40 (2006.01)
CPC (source: EP)
C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 8/0205 (2013.01); C21D 8/0221 (2013.01); C22C 38/18 (2013.01); C22C 38/40 (2013.01)
Citation (applicant)
- JP 2003253401 A 20030910 - JFE STEEL KK, et al
- JP 2005015899 A 20050120 - SUMITOMO METAL IND
- JP 2005015896 A 20050120 - SUMITOMO METAL IND
- JP H08269550 A 19961015 - NIPPON STEEL CORP
- JP H04143214 A 19920518 - NIPPON STEEL CORP
- JP H01316418 A 19891221 - NIPPON STEEL CORP
- US 5817193 A 19981006 - PALUMBO GINO [CA]
Citation (search report)
- [DX] JP H08269550 A 19961015 - NIPPON STEEL CORP
- [DX] JP H04143214 A 19920518 - NIPPON STEEL CORP
- [X] JP S60255921 A 19851217 - SUMITOMO METAL IND, et al
- [A] US 4239556 A 19801216 - ANTHONY THOMAS R [US], et al
- [A] JP H01255621 A 19891012 - MITSUBISHI HEAVY IND LTD
- [PA] RAGHUVIR SINGH, SANDIP GHOSH CHOWDHURY, INDRANIL CHATTORAJ: "Modification of Sensitization Resistance of AISI 304L stainless Steel through Changes in Grain Size and Grain Boundary Character Distributions", METALLURGICAL AND MATERIALS TRANSACTIONS A, vol. 39A, 1 October 2008 (2008-10-01), pages 2504 - 2512, XP002538568
Designated contracting state (EPC)
DE FR SE
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 08159613 A 20080703