Processing

Please wait...

Settings

Settings

Goto Application

1. WO2021052312 - MARTENSITIC STEEL STRIP AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2021/052312
Publication Date 25.03.2021
International Application No. PCT/CN2020/115280
International Filing Date 15.09.2020
IPC
C22C 38/16 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
16containing copper
C22C 38/02 2006.1
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 38/12 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
12containing tungsten, tantalum, molybdenum, vanadium or niobium
C22C 38/06 2006.1
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 38/04 2006.1
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 33/04 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
04by melting
CPC
B22D 11/06
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
11Continuous casting of metals, i.e. casting in indefinite lengths
06into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
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, e.g. BY DECARBURISATION OR TEMPERING
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
C21D 1/74
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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
C21D 11/00
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, e.g. BY DECARBURISATION OR TEMPERING
11Process control or regulation for heat treatments
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
C22C 33/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
04by melting
Applicants
  • 宝山钢铁股份有限公司 BAOSHAN IRON & STEEL CO., LTD. [CN]/[CN]
Inventors
  • 吴建春 WU, Jianchun
  • 方园 FANG, Yuan
Agents
  • 上海专利商标事务所有限公司 SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC
Priority Data
201910888738.919.09.2019CN
201910888765.619.09.2019CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) MARTENSITIC STEEL STRIP AND MANUFACTURING METHOD THEREFOR
(FR) BANDE D'ACIER MARTENSITIQUE ET PROCÉDÉ DE FABRICATION ASSOCIÉ
(ZH) 马氏体钢带及其制造方法
Abstract
(EN) A thin-gauge martensitic steel strip and a manufacturing method therefor, the steel strip comprising the following ingredients in weight percentage: C: 0.16-0.26%, Si: 0.1-0.5%, Mn: 0.4-1.7%, P≤0.02%, S≤0.007%, N: 0.004-0.010%, Als: <0.001%, optional B: 0.001-0.006%, total oxygen [O]T: 0.007-0.020%, and the remainder being Fe and other inevitable impurities. In addition, the steel strip satisfies the following: containing one or two among Cu: 0.1-0.6% or Sn: 0.005-0.04%; containing one or two among Nb: 0.01-0.08% and Mo: 0.1-0.4%; and Mn/S>250. According to the present invention, residual Sn, Cu and like elements in scrap steel are used to smelt molten steel, and Nb/Mo and like microalloy elements and optional B are selectively added to steel. During the smelting process, the basicity of lag, the type and melting point of inclusions in steel, the content of free oxygen in molten steel and the content of acid-soluble aluminum Als are controlled; and then dual-roller thin strip continuous casting is performed to cast a cast strip, and the described steel strip is obtained by on-line hot rolling and rapid cooling by means of gas atomization.
(FR) L'invention concerne une bande d'acier martensitique à faible épaisseur et un procédé de fabrication associé, la bande d'acier comprenant les ingrédients suivants en pourcentage en poids : C : 0,16-0,26 %, Si : 0,1-0,5 %, Mn : 0,4-1,7 %, P ≤ 0,02 %, S ≤ 0,007 %, Nb : 0,004-0,010 %, Als : < 0,001 %, éventuellement B : 0,001-0,006 %, oxygène total [O]T : 0,007-0,020%, le reste étant du Fe et d'autres impuretés inévitables. De plus, la bande d'acier satisfait aux conditions suivantes : elle contient un ou deux éléments parmi Cu : 0,1-0,6 % ou Sn : 0,005-0,04 % ; elle contient un ou deux éléments parmi Nb : 0,01-0,08% et Mo : 0,1-0,4 % ; et Mn/S > 250. Selon la présente invention, des éléments résiduels de Sn, Cu et similaires dans de l'acier de rebut sont utilisés pour faire fondre de l'acier fondu, et des éléments de micro-alliage de Nb/Mo et similaires et éventuellement des éléments B sont ajoutés de manière sélective à l'acier. Pendant le processus de fusion, la basicité du laitier, le type et le point de fusion des inclusions dans l'acier, la teneur en oxygène libre dans l'acier fondu et la teneur en aluminium solubles dans l'acide Als sont contrôlés ; puis la coulée continue en bande mince à double rouleau est réalisée pour couler une bande de coulée, et la bande d'acier décrite est obtenue par laminage à chaud en ligne et refroidissement rapide au moyen d'une atomisation de gaz.
(ZH) 一种薄规格马氏体钢带及其制造方法,其成分重量百分比为:C:0.16-0.26%,Si:0.1-0.5%,Mn:0.4-1.7%,P≤0.02%,S≤0.007%,N:0.004-0.010%,Als:<0.001%,任选的B:0.001-0.006%,总氧[O] T:0.007-0.020%;余量为Fe和其他不可避免杂质,且同时满足:含有Cu:0.1-0.6%或Sn:0.005-0.04%中的一种或两种;含有Nb:0.01-0.08%,Mo:0.1-0.4%中的一种或两种;Mn/S>250。本发明利用废钢中残余的Sn、Cu等元素进行钢水的冶炼,并在钢中有选择地添加Nb/Mo等微合金元素和任选的B;冶炼过程中通过控制渣的碱度、钢中夹杂物类型及熔点、钢水中的游离氧含量、酸溶铝Als含量;然后进行双辊薄带连铸浇铸出铸带,经在线热轧、气雾化快速冷却获得。
Latest bibliographic data on file with the International Bureau