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1. WO2020108595 - HOT-ROLLED HIGH-STRENGTH STEEL PLATE WITH HIGH SURFACE QUALITY AND LOW YIELD RATIO AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/108595
Publication Date 04.06.2020
International Application No. PCT/CN2019/121864
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 38/06 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
C22C 38/14 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
14containing titanium or zirconium
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 33/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
04by melting
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 8/0263
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 33/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
04by melting
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
  • 张建苏 ZHANG, Jiansu
  • 柏明卓 BAI, Mingzhuo
  • 庞厚君 PANG, Houjun
  • 胡兆辉 HU, Zhaohui
  • 华骏山 HUA, Junshan
  • 郁锋 YU, Feng
  • 王明 WANG, Ming
Agents
  • 上海专利商标事务所有限公司 SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC
Priority Data
201811453372.430.11.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) HOT-ROLLED HIGH-STRENGTH STEEL PLATE WITH HIGH SURFACE QUALITY AND LOW YIELD RATIO AND MANUFACTURING METHOD THEREFOR
(FR) PLAQUE D'ACIER À HAUTE RÉSISTANCE LAMINÉE À CHAUD AYANT UNE QUALITÉ DE SURFACE ÉLEVÉE ET UN FAIBLE RAPPORT DE RENDEMENT ET SON PROCÉDÉ DE FABRICATION
(ZH) 一种高表面质量、低屈强比热轧高强度钢板及制造方法
Abstract
(EN)
A hot-rolled high-strength steel plate with high surface quality and low yield ratio and a manufacturing method therefor. The steel plate is prepared from the components in percentage by weight: C: 0.045-0.085%; Si≤0.15%, Mn: 1.0-1.5%; P≤0.05%; S≤0.001%; Al: 0.5-2.0%; N≤0.0060%; Ti≤0.03%; B≤0.0005%; and the balance of Fe and inevitable impurities, where Mn + 20C = 2.2-3.2%. The high-strength steel plate has a simple cooling process after hot rolling, uniform performance, and good plate shape. The high-strength steel plate has good cold workability and welding performance, low production cost, and good surface quality, and can satisfy the requirements of appearance and coating of an automobile chassis and automobile wheels.
(FR)
L'invention concerne une plaque d'acier à haute résistance laminée à chaud ayant une qualité de surface élevée et un faible rapport de rendement et son procédé de fabrication. La plaque d'acier est préparée à partir des constituants suivants, en pourcentage en poids : C : 0,045 à 0,085 %; Si ≤ 0,15 %, Mn : 1,0 à 1,5 %; P ≤ 0,05 %; S ≤ 0,001 %; Al : 0,5 à 2,0 %; N ≤ 0,0060 %; Ti ≤ 0,03 %; B ≤ 0,0005 %; et le reste étant du Fe et des impuretés inévitables, où Mn + 20 C = 2,2 à 3,2 %. La plaque d'acier à haute résistance présente un processus de refroidissement simple après un laminage à chaud, une performance uniforme et une bonne forme de plaque. La plaque d'acier à haute résistance présente une bonne aptitude au façonnage à froid et une bonne performance de soudage, un faible coût de production et une bonne qualité de surface, et peut satisfaire aux exigences d'aspect et de revêtement d'un châssis d'automobile et de roues d'automobile.
(ZH)
一种高表面质量、低屈强比热轧高强度钢板及其制备方法,其成分重量百分比为:C 0.045-0.085%、Si≤0.15%、Mn 1.0~1.5%、P≤0.05%、S≤0.001%、Al 0.5~2.0%、N≤0.0060%;Ti≤0.03%、B≤0.0005%,其余是Fe和不可避免的杂质;且,Mn+20C=2.2-3.2%。该高强度钢板热轧后冷却工艺较简单、性能均匀、板形好,具有良好冷加工性和焊接性能,生产成本低,同时具有良好的表面质量,能够满足汽车底盘和汽车车轮外观和涂覆的要求。
Also published as
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