Global Patent Index - EP 3480331 A4

EP 3480331 A4 20200101 - FERRITIC HEAT-RESISTANT STEEL AND FERRITIC HEAT TRANSFER MEMBER

Title (en)

FERRITIC HEAT-RESISTANT STEEL AND FERRITIC HEAT TRANSFER MEMBER

Title (de)

FERRITISCHER HITZEFESTER STAHL UND FERRITISCHE WÄRMEÜBERTRAGUNGSTEIL

Title (fr)

ACIER FERRITIQUE RÉSISTANT À LA CHALEUR ET ÉLÉMENT DE TRANSFERT THERMIQUE FERRITIQUE

Publication

EP 3480331 A4 20200101 (EN)

Application

EP 17820295 A 20170629

Priority

  • JP 2016128431 A 20160629
  • JP 2017024012 W 20170629

Abstract (en)

[origin: EP3480331A1] This invention provides a ferritic heat transfer member (4) that is excellent in heat transfer characteristics and steam oxidation resistance properties, and a heat resistant ferritic steel (1) that is capable of realizing the ferritic heat transfer member (4). The heat resistant ferritic steel (1) includes a base material (2), and an oxidized layer A on the surface of the base material (2). The base material (2) has a chemical composition containing, in mass%: C: 0.01 to 0.3%, Si: 0.01 to 2.0%, Mn: 0.01 to 2.0%, Cr: 7.0 to 14.0%, N: 0.005 to 0.15%, and sol. Al: 0.001 to 0.3%, and one or more types of element selected from a group consisting of Mo, Ta, W and Re in a total amount of 0.5 to 7.0%, with the balance being Fe and impurities. An oxidized layer A includes a chemical composition containing, in mass%: Cr and Mn in a total amount of 20 to 45%, and one or more types of element selected from a group consisting of Mo, Ta, W and Re in a total amount of 0.5 to 10%.

IPC 8 full level

C22C 38/00 (2006.01); C21D 1/76 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01); C22C 38/32 (2006.01); C22C 38/58 (2006.01); C23C 8/10 (2006.01); C23C 8/18 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/10 (2006.01)

CPC (source: EP KR US)

C21D 1/76 (2013.01 - KR); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/20 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/30 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/42 (2013.01 - US); C22C 38/44 (2013.01 - US); C22C 38/58 (2013.01 - KR); C23C 8/10 (2013.01 - KR); C23C 8/18 (2013.01 - EP US); C21D 6/002 (2013.01 - EP); C21D 8/0278 (2013.01 - EP); C21D 8/105 (2013.01 - EP); C21D 2211/005 (2013.01 - EP KR)

Citation (search report)

  • [X] US 2014295194 A1 20141002 - NISHIYAMA YOSHITAKA [JP], et al
  • [AD] JP 2013127103 A 20130627 - BABCOCK HITACHI KK
  • [AD] JP H1192880 A 19990406 - NAT RES INST METALS, et al
  • [A] JP 2009007601 A 20090115 - NISSHIN STEEL CO LTD
  • [A] CN 103334056 A 20131002 - UNIV TIANJIN TECHNOLOGY
  • [A] US 5520751 A 19960528 - PAREEK VINOD K [US], et al
  • [A] SHUKLA AMARISH K ET AL: "Effect of Cold Working on Hot Corrosion Behavior of 9 Cr-1 Mo Ferritic Steel in 75 wt% Na2SO4 + 25 wt% K2SO4Molten Salt Environment at 900 °C", TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, SPRINGER INDIA, IN, vol. 69, no. 5, 2 February 2016 (2016-02-02), pages 1049 - 1057, XP035964217, ISSN: 0972-2815, [retrieved on 20160202], DOI: 10.1007/S12666-015-0619-4
  • [A] NIU KUN ET AL: "Corrosion performance of 13Cr stainless steel in high temperature and high pressure environments", FUSHI-YU-FANGHU ? = CORROSION AND PROTECTION, XX, CN, vol. 33, no. 5, 1 January 2012 (2012-01-01), pages 407 - 410, XP009517346, ISSN: 1005-748X
  • See also references of WO 2018003941A1

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 MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3480331 A1 20190508; EP 3480331 A4 20200101; CA 3028947 A1 20180104; CN 109415787 A 20190301; JP 6801712 B2 20201216; JP WO2018003941 A1 20190425; KR 102165758 B1 20201014; KR 20190022779 A 20190306; US 2019330724 A1 20191031; WO 2018003941 A1 20180104

DOCDB simple family (application)

EP 17820295 A 20170629; CA 3028947 A 20170629; CN 201780040403 A 20170629; JP 2017024012 W 20170629; JP 2018525276 A 20170629; KR 20197002574 A 20170629; US 201716310605 A 20170629