Global Patent Index - EP 3354764 B1

EP 3354764 B1 20200311 - QUENCH HARDENED STEEL

Title (en)

QUENCH HARDENED STEEL

Title (de)

ABSCHRECKGEHÄRTETER STAHL

Title (fr)

ACIER DURCIES PAR TREMPAGE

Publication

EP 3354764 B1 20200311 (EN)

Application

EP 17153320 A 20170126

Priority

EP 17153320 A 20170126

Abstract (en)

[origin: EP3354764A1] The present invention relates to a hardenable steel, hardened steel components made from the same, and methods for forming the same. The steel contains relatively high levels of molybdenum in comparison to chromium, silicon and manganese, with the molybdenum providing an excellent combination of hardness and impact strength in the hardened steel. The steel can be cold formed then reheat-quench hardened with water as the quenching agent with no cracking and optionally no tempering. The steels formed have Vickers hardness levels of over 630 Hv10 (e.g. over 700 Hv10), and impact strengths of over 3 J/cm 2 (e.g. over 20 J/cm 2 ).

IPC 8 full level

C22C 38/12 (2006.01); C21D 1/18 (2006.01); C21D 1/25 (2006.01); C21D 1/55 (2006.01); C21D 1/56 (2006.01); C21D 1/60 (2006.01); C21D 8/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)

CPC (source: EP)

C21D 1/18 (2013.01); C21D 1/25 (2013.01); C21D 1/55 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C21D 1/60 (2013.01); C21D 8/0226 (2013.01); C21D 2211/008 (2013.01)

Citation (examination)

None

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 3354764 A1 20180801; EP 3354764 B1 20200311; HU E049006 T2 20200828; PL 3354764 T3 20200824

DOCDB simple family (application)

EP 17153320 A 20170126; HU E17153320 A 20170126; PL 17153320 T 20170126