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1. WO2020201437 - HIGH-HARDNESS STEEL PRODUCT AND METHOD OF MANUFACTURING THE SAME

Publication Number WO/2020/201437
Publication Date 08.10.2020
International Application No. PCT/EP2020/059423
International Filing Date 02.04.2020
IPC
C21D 8/02 2006.01
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
C22C 38/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/42 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
42with copper
C22C 38/44 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
44with molybdenum or tungsten
C22C 38/54 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
54with boron
CPC
C21D 1/00
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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
C21D 2211/008
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
2211Microstructure comprising significant phases
008Martensite
C21D 8/0226
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
0221characterised by the working steps
0226Hot rolling
C21D 8/0263
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
0247characterised by the heat treatment
0263following hot rolling
C22C 38/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
Applicants
  • SSAB TECHNOLOGY AB [SE]/[SE]
Inventors
  • LARSSON, Magnus
  • GLADH, Magnus
Agents
  • VALEA AB
Priority Data
19167552.905.04.2019EP
19185759.811.07.2019EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HIGH-HARDNESS STEEL PRODUCT AND METHOD OF MANUFACTURING THE SAME
(FR) PRODUIT EN ACIER DE HAUTE DURETÉ ET PROCÉDÉ DE FABRICATION D’UN TEL PRODUIT
Abstract
(EN)
A hot-rolled steel strip product comprising a composition consisting of, in terms of weight percentages, 0.14 % to 0.35 % C, 0 % to 0.5 % Si, 0.05 % to 0.40 % Mn, 0.1 % or less Al, 0.1 % to 0.4 % Cu, 0.2 % to 0.9 % Ni, 0.2 % to 0.9 % Cr, 0.2 % or less Mo, 0.005 % or less Nb, 0.035 % or less Ti, 0.05 % or less V, 0.0005 % to 0.0050 % B, 0.025 % or less P, 0.008 % or less S, 0.01 % or less N, 0.01 % or less Ca, and the remainder being Fe and inevitable impurities, wherein the steel product has a Brinell hardness in the range of 420 to 580 HBW.
(FR)
L’invention concerne un produit de type bande d'acier laminée à chaud comprenant une composition constituée, en pourcentages en poids, de 0,14 % à 0,35 % de C, de 0 % à 0,5 % de Si, de 0,05 % à 0,40 % de Mn, de 0,1 % ou moins d'Al, de 0,1 % à 0,4 % de Cu, de 0,2 % à 0,9 % de Ni, de 0,2 % à 0,9 % de Cr, de 0,2 % ou moins de Mo, de 0,005 % ou moins de Nb, de 0,035 % ou moins de Ti, de 0,05 % ou moins de V, de 0,0005 % à 0,0050 % de B, 0,025 % ou moins de P, de 0,008 % ou moins de S, de 0,01 % ou moins de N, de 0,01 % ou moins de Ca, le reste étant du Fe et des impuretés inévitables, le produit en acier ayant une dureté Brinell comprise dans la plage de 420 à 580 HBW.
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