EP 3980571 A1 20220413 - STEEL STRIP FOR FLAPPER VALVES
Title (en)
STEEL STRIP FOR FLAPPER VALVES
Title (de)
STAHLBAND FÜR KLAPPENVENTILE
Title (fr)
BANDE D'ACIER POUR CLAPETS À BATTANT
Publication
Application
Priority
- SE 1950679 A 20190607
- SE 2020050569 W 20200605
Abstract (en)
[origin: WO2020246937A1] The invention relates to a cold rolled and pre-hardened martensitic steel strip for flapper valve reeds in the compressors, wherein the steel strip is made from steel comprising in weight % (wt. %): C 0.9 - 1.1 Si 0.1 - 0.5 Mn 0.2 - 0.8 Cr 0.05 – 0.3 V 0.05 - 0.20 Nb 0.02 - 0.09 optional elements, Fe and impurities balance, wherein the steel strip has a matrix comprising tempered martensite and up to 8% area fraction of remaining secondary carbides and wherein the steel strip has a thickness of 0.07- 3.5 mm and a width of 7- 450 mm.
IPC 8 full level
C22C 38/26 (2006.01); C21D 8/02 (2006.01); C21D 9/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/24 (2006.01)
CPC (source: EP SE)
C21D 1/18 (2013.01 - EP); C21D 1/22 (2013.01 - EP); C21D 1/56 (2013.01 - EP); C21D 1/58 (2013.01 - EP); C21D 1/60 (2013.01 - EP); C21D 6/002 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 6/02 (2013.01 - EP); C21D 8/0205 (2013.01 - EP SE); C21D 8/0226 (2013.01 - EP); C21D 8/0236 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C21D 8/0268 (2013.01 - EP); C21D 8/0273 (2013.01 - EP); C21D 9/02 (2013.01 - EP SE); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP); C22C 38/02 (2013.01 - EP SE); C22C 38/04 (2013.01 - EP SE); C22C 38/06 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP SE); C22C 38/26 (2013.01 - EP SE); F04B 39/1073 (2013.01 - SE); C21D 2211/008 (2013.01 - EP)
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)
WO 2020246937 A1 20201210; BR 112021024371 A2 20220118; CN 113939608 A 20220114; EP 3980571 A1 20220413; EP 3980571 A4 20231122; SE 1950679 A1 20201208; SE 543422 C2 20210112
DOCDB simple family (application)
SE 2020050569 W 20200605; BR 112021024371 A 20200605; CN 202080041948 A 20200605; EP 20817981 A 20200605; SE 1950679 A 20190607