Global Patent Index - EP 2100977 A1

EP 2100977 A1 20090916 - Method of increasing resistance to stress corrosion cracking of austenitic stainless steels

Title (en)

Method of increasing resistance to stress corrosion cracking of austenitic stainless steels

Title (de)

Verfahren zur Erhöhung der Spannungsrisskorrosionsbeständigkeit von austenitischen Edelstählen

Title (fr)

Procédé d'amélioration de la tenue à la corrosion sous contraintes des aciers inoxydables austénitiques

Publication

EP 2100977 A1 20090916 (EN)

Application

EP 09154817 A 20090311

Priority

US 4747108 A 20080313

Abstract (en)

A method of providing resistance to intergranular stress corrosion cracking in an alloy material, the method comprising sensitizing the alloy to form carbides (22), allowing the carbides to precipitate, and applying a heat treatment to replenish a chromium-depleted zone (24).

IPC 8 full level

C21D 1/00 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01)

CPC (source: EP US)

C21D 1/26 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 6/02 (2013.01 - EP US); C22C 19/05 (2013.01 - EP US); C22C 19/058 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/40 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C21D 9/50 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US)

Citation (search report)

  • [X] US 4168994 A 19790925 - OWENS CLARK M
  • [X] JP S60197816 A 19851007 - MITSUBISHI HEAVY IND LTD
  • [X] JP S5469516 A 19790604 - HITACHI LTD
  • [X] STEFEC, RUDOLF: "Structure corrosion of alloyed austenite", KORROSION (DRESDEN) , 11(6), 303-10 CODEN: KRRSAU; ISSN: 0368-6752, 1980, XP009119269
  • [X] DEVINE ET AL: "Kinetics of sensitization and de-sensitization of duplex 308 stainless steel", ACTA METALLURGICA, PERGAMON PRESS, US, vol. 36, no. 6, 1 June 1988 (1988-06-01), pages 1491 - 1501, XP024024733, ISSN: 0001-6160, [retrieved on 19880601]
  • [X] DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; 22 April 2001 (2001-04-22), BROWN, HIRAM: "Carbides in 310 stainless steel", XP002535099, retrieved from STN Database accession no. 1954:56254 & BROWN, HIRAM: "Carbides in 310 stainless steel", STEEL (CLEVELAND) , 135(NO. 3;NO. 4), 106-8;92-4 CODEN: STELAC, 1954, XP009119349
  • [X] WHITE, WILLIAM E. ET AL: "Metallographic observations on the formation and occurrence of ferrite, sigma phase, and carbides in austenitic stainless steels. I. AISI type 310 stainless steel", METALLOGRAPHY , 3(1), 35-50 CODEN: MEIJAP; ISSN: 0026-0800, 1970, XP023901147
  • [X] WHITE, WILLIAM E. ET AL: "Metallographic observations on the formation and occurrence of ferrite, sigma phase, and carbides in austenitic stainless steels. II. AISI type 316 stainless steel", METALLOGRAPHY , 3(1), 51-60 CODEN: MEIJAP; ISSN: 0026-0800, 1970, XP024083071
  • [X] WHITE, W. E. ET AL: "Metallographic observations on the formation and occurrence of ferrite, sigma phase, and carbides in austenitic stainless steels. III. Electron microscopy studies", METALLOGRAPHY , 5(4), 333-45 CODEN: MEIJAP; ISSN: 0026-0800, 1972, XP024354896

Designated contracting state (EPC)

DE ES IT

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2100977 A1 20090916; CN 101532075 A 20090916; US 2009229714 A1 20090917

DOCDB simple family (application)

EP 09154817 A 20090311; CN 200910127528 A 20090312; US 4747108 A 20080313