Global Patent Index - EP 2853608 B1

EP 2853608 B1 20170927 - Precipitation hardening steel with improved toughness and method

Title (en)

Precipitation hardening steel with improved toughness and method

Title (de)

Ausscheidungshärtender Stahl mit verbesserter Festigkeit und Verfahren

Title (fr)

Acier à durcissement par précipitation avec ténacité améliorée et procédé

Publication

EP 2853608 B1 20170927 (EN)

Application

EP 14175600 A 20140703

Priority

US 201314038229 A 20130926

Abstract (en)

[origin: EP2853608A1] In some aspects, a heat treatment process (200) is described for precipitation hardening steel. The heat treatment process (200) can include a solution treatment (202) for a precipitation hardening steel part. The solution treatment (202) includes heating the precipitation hardening steel part to an austenitizing temperature. The heat treatment process (200) can also include a quenching or cooling treatment (204, 206), in which the precipitation hardening steel part is cooled to a martensitizing temperature. The heat treatment process (200) can also include an aging treatment (210), in which the precipitation hardening steel part is heated to a temperature of 1000 °F and held at that temperature for five or more hours until a fracture toughness of the precipitation hardening steel part is greater than 120 ksiˆšin.

IPC 8 full level

C21D 6/02 (2006.01); C21D 1/74 (2006.01); C21D 6/00 (2006.01); C21D 6/04 (2006.01)

CPC (source: EP US)

C21D 1/18 (2013.01 - EP US); C21D 1/74 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 6/02 (2013.01 - EP US); C21D 6/04 (2013.01 - EP); C21D 9/0068 (2013.01 - EP US); C22C 38/40 (2013.01 - US); C21D 2211/008 (2013.01 - EP)

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 2853608 A1 20150401; EP 2853608 B1 20170927; CA 2862600 A1 20150326; CA 2862600 C 20170926; US 2016138122 A1 20160519

DOCDB simple family (application)

EP 14175600 A 20140703; CA 2862600 A 20140910; US 201314038229 A 20130926