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1. WO2020135437 - STEEL RESISTANT TO SEAWATER CORROSION AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/135437
Publication Date 02.07.2020
International Application No. PCT/CN2019/128004
International Filing Date 24.12.2019
IPC
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 38/50 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
50with titanium or zirconium
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 8/0226
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, 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
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, 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
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 38/002
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
  • 温东辉 WEN, Donghui
  • 宋凤明 SONG, Fengming
  • 杨阿娜 YANG, Ana
  • 王炜 WANG, Wei
  • 李自刚 LI, Zigang
  • 周庆军 ZHOU, Qingjun
  • 缪乐德 MIAO, Lede
Agents
  • 上海华诚知识产权代理有限公司 WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD.
Priority Data
201811580228.724.12.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) STEEL RESISTANT TO SEAWATER CORROSION AND MANUFACTURING METHOD THEREFOR
(FR) ACIER RÉSISTANT À LA CORROSION PAR L'EAU DE MER ET SON PROCÉDÉ DE FABRICATION
(ZH) 一种耐海水腐蚀钢及其制造方法
Abstract
(EN)
Disclosed is a steel resistant to seawater corrosion, the mass percentage ratio of the chemical elements thereof being: 0.03-0.05% of C, 0.04-0.08% of Si, 0.8-1.2% of Mn, 0.1-0.2% of Cu, 2.5-5.5% of Cr, 0.05-0.15% of Ni, 0.15-0.35% of Mo, 1.5-3.5% of Al, 0.01-0.02% of Ti, and 0.0015-0.003% of Ca, the balance being Fe and other inevitable impurities. The method for manufacturing the steel resistant to seawater corrosion comprises: (1) smelting and casting; (2) reheating, which involves reheating a casting blank to 1200ºC-1260ºC; (3) rough rolling; (4) fine rolling; (5) winding; and (6) cooling to room temperature. The steel resistant to seawater corrosion has good seawater corrosion resistance and excellent mechanical properties.
(FR)
L'invention concerne un acier résistant à la corrosion par l'eau de mer, le rapport massique en pourcentage de ses éléments chimiques étant : de 0,03 à 0,05 % de C, de 0,04 à 0,08 % de Si, de 0,8 à 1,2 % de Mn, de 0,1 à 0,2 % de Cu, de 2,5 à 5,5 % de Cr, de 0,05 à 0,15 % de Ni, de 0,15 à 0,35 % de Mo, de 1,5 à 3,5 % d'Al, de 0,01 à 0,02 % de Ti et de 0,0015 à 0,003 % de Ca, le reste étant constitué de Fe et d'impuretés inévitables. Le procédé de fabrication de l'acier résistant à la corrosion par l'eau de mer comprend les étapes suivantes : (1) fusion et coulage ; (2) réchauffage, qui consiste à réchauffer une ébauche de coulée de 1 200 °C à 1 260 °C ; (3) laminage de dégrossissage ; (4) laminage de finition ; (5) enroulement ; et (6) refroidissement à température ambiante. L'acier résistant à la corrosion par l'eau de mer a une bonne résistance à la corrosion par l'eau de mer et d'excellentes propriétés mécaniques.
(ZH)
一种耐海水腐蚀钢,其化学元素质量百分配比为:C:0.03-0.05%,Si:0.04-0.08%,Mn:0.8-1.2%,Cu:0.1-0.2%,Cr:2.5-5.5%,Ni:0.05-0.15%,Mo:0.15-0.35%,Al:1.5-3.5%,Ti:0.01-0.02%,Ca:0.0015-0.003%,余量为Fe和其他不可避免的杂质。该海水耐腐蚀钢制造方法,包括:(1)冶炼和浇铸;(2)再加热:铸坯被再加热到1200℃-1260℃;(3)粗轧;(4)精轧;(5)卷取;(6)冷却至室温。该耐海水腐蚀钢具有良好的耐海水腐蚀性能以及优良的力学性能。
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