EP 3209806 B1 20201125 - AN ULTRA-HIGH STRENGTH THERMO-MECHANICALLY PROCESSED STEEL
Title (en)
AN ULTRA-HIGH STRENGTH THERMO-MECHANICALLY PROCESSED STEEL
Title (de)
ULTRAHOCHFESTER THERMOMECHANISCH BEHANDELTER STAHL
Title (fr)
ACIER TRAITÉ THERMOMÉCANIQUEMENT À TRÈS HAUTE RÉSISTANCE
Publication
Application
Priority
- IN 3355MU2014 A 20141021
- IB 2015058107 W 20151021
Abstract (en)
[origin: WO2016063224A1] The present invention disclosed an ultra-high strength steel for structural components, a process of making such steel that has a desirable microstructure in the thermo-mechanically processed and differently cooled conditions that delivers high fatigue performance in service, and a process of making forged components using such steel. The steel and the process of its manufacturing enables manufacture of components that exhibit bainitic microstructure that impart ultra- high strength ranges with very high fatigue performance. The invention enables saving in alloying additives compared to hardened and tempered alloy steels and in addition avoid expensive heat treatment operations to achieve the desired range of mechanical properties. The steel of the invention is a suitable replacement for micro alloyed steel or heat treated steel bars used for structural component development. The steel can be used for applied as the hot rolled and air cooled long products that can be directly used for applications or it can be directly hot forged in open or closed die forging followed by controlled cooling to achieve the desired microstructure and range of mechanical properties.
IPC 8 full level
C21D 8/00 (2006.01); C22C 38/00 (2006.01)
CPC (source: EP US)
C21D 8/0205 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C21D 1/30 (2013.01 - EP US); C21D 7/13 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US)
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)
WO 2016063224 A1 20160428; EP 3209806 A1 20170830; EP 3209806 B1 20201125; HU E052776 T2 20210528; US 2017369976 A1 20171228
DOCDB simple family (application)
IB 2015058107 W 20151021; EP 15808458 A 20151021; HU E15808458 A 20151021; US 201515520849 A 20151021