EP 3480331 A1 20190508 - 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
Application
Priority
- JP 2016128431 A 20160629
- JP 2017024012 W 20170629
Abstract (en)
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 38/58 (2006.01); C23C 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)
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
Designated extension state (EPC)
BA ME
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