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1. WO2020087961 - 80 MM LARGE-THICKNESS HIGH-TOUGHNESS LOW-ALLOY WEAR-RESISTANT STEEL PLATE AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/087961
Publication Date 07.05.2020
International Application No. PCT/CN2019/093658
International Filing Date 28.06.2019
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 38/44 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
C22C 38/48 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
48with niobium or tantalum
C22C 38/46 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
46with vanadium
CPC
C21D 2211/008
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
2211Microstructure comprising significant phases
008Martensite
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 8/0247
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
C22C 38/02
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
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
Applicants
  • 南京钢铁股份有限公司 NANJING IRON & STEEL CO., LTD. [CN]/[CN]
Inventors
  • 雷晓荣 LEI, XiaoRong
  • 王升 WANG, Sheng
  • 王新 WANG, Xin
  • 闫强军 YAN, QiangJun
  • 姜在伟 JIANG, ZaiWei
  • 杨柳 YANG, Liu
  • 张仪杰 ZHANG, YiJie
Agents
  • 南京利丰知识产权代理事务所(特殊普通合伙) NANJING LI & FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL CENERAL PARTNERSHIP)
Priority Data
201811266764.X29.10.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) 80 MM LARGE-THICKNESS HIGH-TOUGHNESS LOW-ALLOY WEAR-RESISTANT STEEL PLATE AND MANUFACTURING METHOD THEREFOR
(FR) PLAQUE D'ACIER RÉSISTANTE À L'USURE, FAIBLEMENT ALLIÉE, À TÉNACITÉ ÉLEVÉE, ET DE 80 MM D'ÉPAISSEUR, ET SON PROCÉDÉ DE FABRICATION
(ZH) 一种80mm大厚度高韧性低合金耐磨钢板及其制造方法
Abstract
(EN)
The present invention relates to a 80 mm large-thickness high-toughness low-alloy wear-resistant steel plate and a manufacturing method therefor. The 80 mm large-thickness high-toughness low-alloy wear-resistant steel plate comprises the following components: 0.18-0.20% of C, 0.20-0.40% of Si, 0.90-1.20% of Mn, 0.012% or less of P, 0.002% or less of S, 0.90-1.20% of Cr, 0.20 0.40% of Mo, 0.50-0.80% of Ni, 0.008-0.030% of Ti, 0.01-0.050% of Nb, 0.030% or less of V, 0.0008-0.0025% of B, 0.02-0.06% of Alt, 0.0040% or less of N, 0.0002% or less of H, and the balance comprising Fe and inevitable impurities. The manufacturing method comprises: molten iron desulfurization pretreatment-converter smelting-LF and RH refinement-continuous casting-casting blank stacking for slow-cooling-casting blank inspection-casting blank determination-casting blank inspection and acceptance-casting blank heating-phosphorus removal-rolling-air cooling-flaw detection-shot blasting-quenching-tempering-straightening-cutting and sampling-logo spray printing-inspection-stocking. The steel plate obtained in the present invention has the surface Brinell hardness greater than 400 HB, the core Brinell hardness greater than 330 HB, and the low-temperature impact energy at -40°Ϲ higher than or equal to 20 J.
(FR)
La présente invention concerne une plaque d'acier résistante à l'usure, faiblement alliée, à ténacité élevée, et de 80 mm d'épaisseur et son procédé de fabrication. La plaque d'acier résistante à l'usure, faiblement alliée, à ténacité élevée, et de 80 mm d'épaisseur comprend les constituants suivants : de 0,18 à 0,20 % de C, de 0,20 à 0,40 % de Si, de 0,90 à 1,20 % de Mn, 0,012 % ou moins de P, 0,002 % ou moins de S, de 0,90 à 1,20 % de Cr, de 0,20 à 0,40 % de Mo, de 0,50 à 0,80 % de Ni, de 0,008 à 0,030 % de Ti, de 0,01 0,050 % de Nb, 0,030 % ou moins de V, de 0,0008 à 0,0025 % de B, de 0,02 à 0,06 % d’Alt, 0,0040 % ou moins de N, 0,0002 % ou moins de H, et le reste comprenant du Fe et des impuretés inévitables. Le procédé de fabrication comprend : le pré-traitement de désulfuration de fer fondu ; la fusion dans un convertisseur ; l’affinement de LF et RH ; la coulée en continu ; l’empilage d’ébauches de coulée en vue de leur refroidissement lent ; l’inspection d’ébauches de coulée ; la détermination d’ébauches de coulée ; l’inspection et la validation d’ébauches de coulée ; le chauffage d’ébauches de coulée ; l’élimination du phosphore ; le laminage ; le refroidissement à l’air ; la détection de défaut ; le grenaillage ; le refroidissement ; le revenu ; le redressement ; la coupe et l’échantillonnage ; l’impression de logo par pulvérisation ; l’inspection ; le stockage. La plaque d'acier obtenue dans la présente invention a une dureté de surface Brinell supérieure à 400 HB, une dureté de noyau Brinell supérieure à 330 HB, et une énergie de rupture à basse température à -40 °C supérieure ou égale à 20 J.
(ZH)
本发明是一种80mm大厚度高韧性低合金耐磨钢板及其制造方法,组分为:C0.18-0.20%、Si0.20-0.40%、Mn0.90-1.20%、P≤0.012%、S≤0.002%、Cr0.90-1.20%、Mo0.20-0.40%、Ni0.50-0.80%、Ti0.008-0.030%、Nb0.01-0.050%、V≤0.030%、B0.0008-0.0025%、Alt:0.02-0.06%、N≤0.0040%、H≤0.0002%,其余为Fe和不可避免的杂质。制造方法包括:铁水脱硫预处理-转炉冶炼-LF+RH精炼-连铸-铸坯堆垛缓冷-铸坯检验-铸坯判定-铸坯验收-铸坯加热-除磷-轧制-空冷-探伤-抛丸-淬火-回火-矫直-切割、取样-喷印标识-检验-入库。本发明获得钢板表面布氏硬度大于400HB,芯部布氏硬度大于330HB,-40℃低温冲击功≥20J。
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