Processing

Please wait...

Settings

Settings

Goto Application

1. WO2016030056 - METHOD FOR PRODUCING A NITRIDED PACKAGING STEEL

Publication Number WO/2016/030056
Publication Date 03.03.2016
International Application No. PCT/EP2015/065055
International Filing Date 02.07.2015
IPC
C21D 8/02 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
C21D 8/04 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
04to produce plates or strips for deep-drawing
C21D 9/48 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
48deep-drawing sheets
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
CPC
C21D 8/02
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
C21D 8/0205
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
0205of ferrous alloys
C21D 8/0236
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
0221characterised by the working steps
0236Cold rolling
C21D 8/0257
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
0247characterised by the heat treatment
0257with diffusion of elements, e.g. decarburising, nitriding
C21D 8/04
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
04to produce plates or strips for deep-drawing
C21D 8/0405
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
04to produce plates or strips for deep-drawing
0405of ferrous alloys
Applicants
  • THYSSENKRUPP RASSELSTEIN GMBH [DE]/[DE]
  • THYSSENKRUPP AG [DE]/[DE]
Inventors
  • KAUP, Burkhard
  • MASSICOT, Blaise
  • MATUSCH, Dirk
Agents
  • CHARRIER RAPP & LIEBAU
Priority Data
10 2014 112 286.027.08.2014DE
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUR HERSTELLUNG EINES AUFGESTICKTEN VERPACKUNGSSTAHLS
(EN) METHOD FOR PRODUCING A NITRIDED PACKAGING STEEL
(FR) PROCÉDÉ POUR LA FABRICATION D'UN ACIER D'EMBALLAGE AZOTÉ
Abstract
(DE) Die Erfindung betrifft ein Verfahren zur Herstellung eines aufgestickten Verpackungsstahls mit einem Kohlenstoffgehalt von 10 bis 1000 ppm und einer Menge von ungebundenem, im Stahl gelösten Stickstoff von mehr als 100 ppm, wobei die Aufstickung in zwei Stufen erfolgt, nämlich einer ersten Stufe, bei der eine Stahlschmelze auf einen Stickstoffgehalt von maximal 160 ppm durch Einleiten eines stickstoffhaltigen Gas und/oder eines stickstoffhaltigen Feststoffs in die Stahlschmelze aufgestickt wird, und eine zweite Stufe, bei der ein aus der aufgestickten Stahlschmelze durch Kaltwalzen erzeugtes Stahlflachprodukt mit einem stickstoffhaltigen Gas behandelt wird,um die Menge von ungebundenem Stickstoff im Stahlflachprodukt weiter zu erhöhen. Die zweite Stufe des Aufstickens erfolgt dabei in einem Glühofen, in dem das Stahlflachprodukt gleichzeitig rekristallisierend geglüht wird. Die mit diesem Verfahren hergestellten Verpackungsstähle zeichnen sich durch eine hohe Festigkeit von mehr als 600 MPa und eine gute Bruchdehnung von regelmäßig mehr als 5% sowie durch gute Umformeigenschaften aus. Die Erfindung betrifft weiterhin einen aufgestickten Verpackungsstahl in Form eines Stahlflachprodukts.
(EN) The invention relates to a method for producing a nitrided packaging steel with a carbon content of 10 to 1000 ppm and an amount of uncombined nitrogen, dissolved in the steel, of more than 100 ppm, wherein the nitriding is performed in two stages, to be specific a first stage, in which a molten steel is nitrided to a nitrogen content of at most 160 ppm by introducing a nitrogen-containing gas and/or a nitrogen-containing solid into the molten steel, and a second stage, in which a flat steel product produced from the nitrided molten steel by cold rolling is treated with a nitrogen-containing gas in order to increase further the amount of uncombined nitrogen in the flat steel product. The second nitriding stage is in this case performed in an annealing furnace, in which the flat steel product is at the same time annealed in a recrystallizing manner. The packaging steels produced by this method are distinguished by great strength, in excess of 600 MPa, and good elongation to fracture, regularly in excess of 5%, as well as by good forming properties. The invention also relates to a nitrided packaging steel in the form of a flat steel product.
(FR) L'invention concerne un procédé pour la fabrication d'un acier d'emballage azoté présentant une teneur en carbone de 10 à 1000 ppm et une quantité d'azote non lié, dissous dans l'acier, supérieure à 100 ppm, l'azotage ayant lieu en deux étapes, à savoir une première étape, dans laquelle une masse fondue d'acier est azotée à une teneur en azote de maximum 160 ppm par introduction d'un gaz contenant de l'azote et/ou d'un solide contenant de l'azote dans la masse fondue d'acier, et une deuxième étape, dans laquelle un produit en acier plat obtenu par laminage à froid à partir de la masse fondue d'acier azoté est traité par un gaz contenant de l'azote pour augmenter davantage l'azote non lié dans le produit en acier plat. La deuxième étape de l'azotage a lieu dans un four de recuit, dans lequel le produit en acier plat est simultanément recuit avec recristallisation. Les aciers d'emballage fabriqués par ce procédé se caractérisent par une solidité élevée supérieure à 600 MPa et par un bon allongement à la rupture qui est régulièrement supérieur à 5 % ainsi que par de bonnes propriétés de déformation. L'invention concerne en outre un acier d'emballage azoté sous forme d'un produit en acier plat.
Latest bibliographic data on file with the International Bureau