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1. WO2020108594 - ZINC-BASED PLATED HOT-FORMED STEEL PLATE OR STEEL STRIP HAVING EXCELLENT COLD BENDING PERFORMANCE, AND MANUFACTURING METHOD THEREOF

Publication Number WO/2020/108594
Publication Date 04.06.2020
International Application No. PCT/CN2019/121860
International Filing Date 29.11.2019
IPC
C22C 38/02 2006.01
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 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 38/60 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
60containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
C22C 38/06 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C23C 2/40 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
34characterised by the shape of the material to be treated
36Elongated material
40Plates; Strips
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
CPC
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 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
0205of ferrous alloys
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 8/0236
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 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
0236Cold rolling
C21D 8/0273
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
0273Final recrystallisation annealing
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
Applicants
  • 宝山钢铁股份有限公司 BAOSHAN IRON & STEEL CO., LTD. [CN]/[CN]
Inventors
  • 毕文珍 BI, Wenzhen
  • 洪继要 HONG, Jiyao
  • 王利 WANG, Li
Agents
  • 上海专利商标事务所有限公司 SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC
Priority Data
201811454798.130.11.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) ZINC-BASED PLATED HOT-FORMED STEEL PLATE OR STEEL STRIP HAVING EXCELLENT COLD BENDING PERFORMANCE, AND MANUFACTURING METHOD THEREOF
(FR) PLAQUE OU BANDE EN ACIER FORMÉE À CHAUD AVEC PLACAGE À BASE DE ZINC AYANT D'EXCELLENTES PERFORMANCES DE PLIAGE À FROID, ET SON PROCÉDÉ DE FABRICATION
(ZH) 一种冷弯性能优良的锌系镀覆热成型钢板或钢带及其制造方法
Abstract
(EN)
Provided are a zinc-based plated hot-formed steel plate or steel strip having excellent cold bending performance, and a manufacturing method thereof; said zinc-based plated hot-formed steel plate or steel strip comprises a substrate having a surface decarburized layer thickness of less than 20 um and a zinc-based plated layer having an adhesion amount of 10 to 100 g/m^2; the component weight percentages of the substrate are: C: 0.1–0.8%, Si: 0.05–2.0%, Mn: 0.5–3.0%, P≤0.1%, S≤0.05%, Al≤0.1%, N≤0.01%; the remainder is Fe and unavoidable impurities; the average size of original austenite grains of the substrate is less than 15 um. After hot forming of the substrate, the hot-formed steel plate or steel strip has a tensile strength of 1500 MPa and elongation after fracture of 5%, and the coating is continuous and complete, there are no cracks extending to the substrate, and the steel plate has excellent cold bending performance.
(FR)
L'invention concerne une plaque ou une bande en acier formée à chaud avec placage à base de zinc ayant d'excellentes performances de pliage à froid, et son procédé de fabrication. Ladite plaque ou bande en acier formée à chaud avec placage à base de zinc comprend un substrat ayant une épaisseur de couche décarburée de surface inférieure à 20 µm et une couche de placage à base de zinc ayant une quantité d'adhérence allant de 10 à 100 g/m^2. Les pourcentages massiques des composants du substrat sont : C : 0,1–0,8 %, Si : 0,05–2,0 %, Mn : 0,5–3,0 %, P≤0,1 %, S≤0,05 %, Al≤0,1 %, N≤0,01 %; le reste étant du Fe et les inévitables impuretés. La taille moyenne des grains d'austénite d'origine du substrat est inférieure à 15 µm. Après la formation à chaud du substrat, la plaque en acier ou la bande en acier formée à chaud présente une résistance à la traction de 1 500 MPa et un allongement après fracture de 5 %, et le revêtement est continu et complet, il n'y a pas de fissures qui s'étendent jusqu'au substrat, et la plaque en acier présente d'excellentes performances de pliage à froid.
(ZH)
一种冷弯性能优良的锌系镀覆热成型钢板或钢带及其制造方法,该锌系镀覆热成型钢板或钢带包括表面脱碳层厚度在20um以下的基板及其上附着量为10~100g/m2的锌系镀层;基板的成分重量百分比为:C:0.1~0.8%、Si:0.05~2.0%、Mn:0.5~3.0%、P≤0.1%、S≤0.05%、Al≤0.1%、N≤0.01%,余Fe和不可避免的杂质;基板的原始奥氏体晶粒平均尺寸在15um以下。该热成型钢板或钢带在满足基板热成型后抗拉强度1500MPa,断后延伸率5%的基础上,镀层连续完整,无扩展至基板的裂纹,且钢板冷弯性能优良。
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