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1. WO2007043168 - COLD-ROLLED STEEL SHEET EXCELLENT IN COATING CURABILITY IN BAKING AND COLD SLOW-AGING PROPERTY AND PROCESS FOR PRODUCING THE SAME

Publication Number WO/2007/043168
Publication Date 19.04.2007
International Application No. PCT/JP2005/018726
International Filing Date 05.10.2005
IPC
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/38 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
38with more than 1.5% by weight of manganese
C22C 38/58 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
58with more than 1.5% by weight of manganese
C21D 9/46 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
B21B 3/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
3Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
C23C 2/06 2006.01
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
04characterised by the coating material
06Zinc or cadmium or alloys based thereon
CPC
B21B 3/02
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
3Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
02Rolling special iron alloys ; , e.g. stainless steel
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 9/46
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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
C22C 38/001
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
001containing N
C22C 38/002
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
002containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
C22C 38/32
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
32with boron
Applicants
  • 新日本製鐵株式会社 NIPPON STEEL CORPORATION [JP]/[JP] (AllExceptUS)
  • 吉永 直樹 YOSHINAGA, Naoki [JP]/[JP] (UsOnly)
  • 丸山 直紀 MARUYAMA, Naoki [JP]/[JP] (UsOnly)
  • 高橋 学 TAKAHASHI, Manabu [JP]/[JP] (UsOnly)
  • 杉浦 夏子 SUGIURA, Natsuko [JP]/[JP] (UsOnly)
Inventors
  • 吉永 直樹 YOSHINAGA, Naoki
  • 丸山 直紀 MARUYAMA, Naoki
  • 高橋 学 TAKAHASHI, Manabu
  • 杉浦 夏子 SUGIURA, Natsuko
Agents
  • 青木 篤 AOKI, Atsushi
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) COLD-ROLLED STEEL SHEET EXCELLENT IN COATING CURABILITY IN BAKING AND COLD SLOW-AGING PROPERTY AND PROCESS FOR PRODUCING THE SAME
(FR) FEUILLE D’ACIER LAMINÉE À FROID EXCELLENTE EN TERMES DE CAPACITÉ À DURCIR LE REVÊTEMENT LORS DE LA CUISSON ET DE PROPRIÉTÉ DE VIEILLISSEMENT LENT À FROID ET SON PROCÉDÉ DE PRODUCTION
(JA) 塗装焼付硬化性能と常温遅時効性に優れた冷延鋼板およびその製造方法
Abstract
(EN)
A steel sheet satisfactory in coating curability in baking and cold slow-aging property; and a process for producing the steel sheet. The steel sheet contains 0.0005-0.0040 mass% carbon, up to 0.8 mass% silicon, up to 2.2 mass% manganese, 0.0005-0.009 mass% sulfur, 0.4-1.3 mass% chromium, 0.003-0.020 mass% oxygen, 0.045-0.12 mass% phosphorus, 0.0002-0.0010 mass% boron, up to 0.008 mass% aluminum, and 0.001-0.007 mass% nitrogen, with the remainder consisting of iron and unavoidable impurities. Nitrogen in a solid solution state is caused to remain in an extra-low-carbon steel, and chromium, phosphorus, boron, and oxygen are added thereto. Thus, a hot-rolled and cold-rolled steel sheet and a cold-rolled steel sheet plated with zinc by hot dipping can be obtained which each combines high coating curability in baking with cold slow-aging property.
(FR)
La présente invention concerne une feuille d'acier satisfaisante en termes de capacité à durcir le revêtement lors de la cuisson et de propriété de vieillissement lent à froid ; et un procédé de production de la feuille d'acier. La feuille d'acier contient de 0,0005 à 0,0040 % en masse de carbone, jusqu'à 0,8 % en masse de silicium, jusqu'à 2,2 % en masse de manganèse, de 0,0005 à 0,009 % en masse de soufre, de 0,4 à 1,3 % en masse de chrome, de 0,003 à 0,020 % en masse d’oxygène, de 0,045 à 0,12 % en masse de phosphore, de 0,0002 à 0,0010 % en masse en bore, jusqu'à 0,008 % en masse d’aluminium et de 0,001 à 0,007 % en masse d’azote, le complément étant constitué de fer et d’impuretés inévitables. L'azote en solution solide permet de rester dans un acier à très faible teneur en carbone, et le chrome, le phosphore, le bore et l'oxygène sont ajoutés à celui-ci. Ainsi, on peut obtenir une feuille d'acier laminée à chaud et laminée à froid et une feuille d'acier laminée à froid plaquée de zinc par une immersion à chaud, chacune combinant une bonne capacité à durcir le revêtement lors de la cuisson et une propriété de vieillissement lent à froid.
(JA)
本発明は塗装焼付硬化性と常温遅時効性の良好な鋼板およびその製造方法を提供するもので、質量%で、C:0.0005~0.0040%、Si:0.8%以下、Mn:2.2%以下、S:0.0005~0.009%、Cr:0.4~1.3%、O:0.003~0.020%、P:0.045~0.12%、B:0.0002~0.0010%、Al:0.008%以下、N:0.001~0.007%を含有し、残部Feおよび不可避的不純物からなる鋼板。極低炭素鋼に固溶Nを残存せしめ、Cr,P,B,Oを添加することで、高い塗装焼付硬化性能と常温遅時効性とを兼備した熱延および冷延鋼板、さらには溶融亜鉛めっき冷延鋼板を得る。
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