Global Patent Index - EP 2496722 A1

EP 2496722 A1 20120912 - PROCESS FOR COATING STEEL STRIPS AND COATED STEEL STRIP

Title (en)

PROCESS FOR COATING STEEL STRIPS AND COATED STEEL STRIP

Title (de)

VERFAHREN ZUM BESCHICHTEN VON STAHLBÄNDERN UND BESCHICHTETES STAHLBAND

Title (fr)

PROCÉDÉ POUR REVÊTIR DES FEUILLARDS D'ACIER ET FEUILLARD D'ACIER REVÊTU

Publication

EP 2496722 A1 20120912 (DE)

Application

EP 10787680 A 20101025

Priority

  • DE 102009053260 A 20091105
  • DE 2010001253 W 20101025

Abstract (en)

[origin: US2012305139A1] In a method for coating steel strips having a base material composition (in weight-%) of: C 0.04-1.0; Mn 9.0-30.0; Al 0.05-15.0; Si 0.05-6.0; Cr≰6.5; Cu≰4; Ti+Zr≰0.7; Nb+V≰0.5, remainder iron including unavoidable steel-incidental elements, the steel strip undergoes annealing and subsequently is coated electrolytically with a coat formed from zinc or a zinc-containing alloy. During the course of annealing of the steel strip at temperatures between 800 and 1000° C. under a N2-H2 containing atmosphere, a surface-near zone is formed which is enriched with nitrides through reaction with elements contained in the steel, thereby preventing molten zinc from penetrating into the base material during welding of the coated steel strip.

IPC 8 full level

C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)

CPC (source: EP KR US)

C21D 6/00 (2013.01 - KR); C21D 8/0457 (2013.01 - EP KR US); C21D 9/48 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C23C 8/26 (2013.01 - EP KR US)

Citation (examination)

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 2011054332 A2 20110512; DE 102009053260 A1 20110519; DE 102009053260 B4 20110901; EP 2496722 A1 20120912; KR 20120097503 A 20120904; RU 2012122998 A 20131210; RU 2544321 C2 20150320; US 2012305139 A1 20121206

DOCDB simple family (application)

DE 2010001253 W 20101025; DE 102009053260 A 20091105; EP 10787680 A 20101025; KR 20127012910 A 20101025; RU 2012122998 A 20101025; US 201013508167 A 20101025