EP 3433386 B1 20200617 - METHOD FOR TEMPERATURE-TREATING A MANGANESE STEEL INTERMEDIATE PRODUCT.
Title (en)
METHOD FOR TEMPERATURE-TREATING A MANGANESE STEEL INTERMEDIATE PRODUCT.
Title (de)
VERFAHREN ZUM TEMPERATURBEHANDELN EINES MANGAN-STAHLZWISCHENPRODUKTS.
Title (fr)
PROCÉDÉ DE TRAITEMENT THERMIQUE D'UN PRODUIT INTERMÉDIAIRE EN ACIER AU MANGANÈSE.
Publication
Application
Priority
- EP 16162073 A 20160323
- EP 2017055714 W 20170310
Abstract (en)
[origin: WO2017162450A1] The invention relates to a method for temperature-treating a manganese steel intermediate product, the alloy of which comprises the following: ⋅ a manganese content which lies in the range of 3 wt.% < Mn < 12 wt.%, ⋅ a content of one or more alloy elements of the following group: silicon (Si), aluminum (Al), nickel (Ni), chromium (Cr), molybdenum (Mo), phosphorus (P), sulfur (S), nitrogen (N), copper (Cu), boron (B), cobalt (Co), and tungsten (W), ⋅ an optional carbon content (C) of less than 1 wt.%, ⋅ an optional content of one or more micro-alloying elements, wherein the entire content of the micro-alloying elements is less than 0.45 wt.%, and ⋅ as the remainder, an iron content (Fe) and unavoidable impurities. The temperature treatment of the steel intermediate product has a first temperature treatment process and a subsequent second temperature treatment process. The first temperature treatment process is a high-temperature process in which the steel intermediate product is exposed to a first annealing temperature during a first hold time, said annealing temperature lying above a critical temperature threshold which is defined as follows: CTT = (856 - SK * manganese content) degrees Celsius, in which SK is a gradient value, and the second temperature treatment process is an annealing process in which the steel intermediate product is exposed to a second annealing temperature which is lower than the first annealing temperature.
IPC 8 full level
C21D 6/00 (2006.01)
CPC (source: EP KR US)
C21D 1/26 (2013.01 - EP KR US); C21D 6/005 (2013.01 - EP KR US); C21D 8/0205 (2013.01 - EP US); C21D 8/0247 (2013.01 - EP US); C21D 9/52 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/12 (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)
EP 3222734 A1 20170927; CN 108884507 A 20181123; CN 108884507 B 20200616; EP 3433386 A1 20190130; EP 3433386 B1 20200617; ES 2816065 T3 20210331; JP 2019516857 A 20190620; JP 6945545 B2 20211006; KR 102246704 B1 20210430; KR 20180127435 A 20181128; US 2019071748 A1 20190307; WO 2017162450 A1 20170928
DOCDB simple family (application)
EP 16162073 A 20160323; CN 201780019271 A 20170310; EP 17709124 A 20170310; EP 2017055714 W 20170310; ES 17709124 T 20170310; JP 2018549819 A 20170310; KR 20187030461 A 20170310; US 201716085361 A 20170310