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1. WO2020206743 - 500 MPA NIOBIUM-CONTAINING RIBBED REINFORCING BAR AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2020/206743
Publication Date 15.10.2020
International Application No. PCT/CN2019/084052
International Filing Date 24.04.2019
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 38/14 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
C22C 38/12 2006.01
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
C21D 8/08 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
06during manufacturing of rods or wires
08for concrete reinforcement
CPC
C21D 2211/005
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
005Ferrite
C21D 2211/009
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
009Pearlite
C21D 8/08
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
06during manufacturing of rods or wires
08for concrete reinforcement
C22C 38/005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
005containing rare earths, i.e. Sc, Y, Lanthanides
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
  • 东北大学 NORTHEASTERN UNIVERSITY [CN]/[CN]
Inventors
  • 王超 WANG, Chao
  • 袁国 YUAN, Guo
  • 康健 KANG, Jian
  • 李振垒 LI, Zhenlei
  • 王国栋 WANG, Guodong
Agents
  • 沈阳东大知识产权代理有限公司 SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD
Priority Data
201910279652.609.04.2019CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) 500 MPA NIOBIUM-CONTAINING RIBBED REINFORCING BAR AND MANUFACTURING METHOD THEREFOR
(FR) BARRE DE RENFORCEMENT NERVURÉE CONTENANT DU NIOBIUM 500 MPA ET PROCÉDÉ DE FABRICATION ASSOCIÉ
(ZH) 一种500MPa级含铌螺纹钢筋及其制造方法
Abstract
(EN)
A 500 MPa niobium-containing ribbed reinforcing bar and a manufacturing method therefor, relating to the field of ribbed reinforcing bar production. The reinforcing bar comprises: C: 0.20-0.25%; Si: 0.5-0.8%; Mn: 1.2-1.6%; P: 0.01-0.04%; S: 0.01-0.04%; Ti: 0.005-0.02%; RE: 0.001-0.01%; Nb: 0.015-0.035%; O: 0.003-0.01%; N: 0.003-0.01%; and the balance of Fe and inevitable impurities. In the reinforcing bar, the number of precipitates containing a Nb compound and having an equivalent diameter of 0.003-0.03 μm is 50-500/μm 2; the total number of inclusions containing a RE compound and/or a Ti compound and having an equivalent diameter of 0.03-3 μm is 2000-4000/mm 2. The manufacturing method comprises: smelting, inclusion control, continuous casting, continuously cast billet heating, and reinforcing bar rolling. The method implements the low-cost and high-quality production of 500 MPa ribbed reinforcing bars.
(FR)
La présente invention a trait au domaine de la production de barres de renforcement nervurées, et concerne une barre de renforcement nervurée contenant du niobium 500 MPa, ainsi qu'un procédé de fabrication associé. La barre de renforcement selon l'invention comprend : C : de 0,20 à 13 % ; Si : de 0,5 à 0,8% ; Mn : de 1,2 à 1,6 % ; P : de 0,01 à 0,04 % ; S : de 0,01 à 0,04% ; Ti : de 0,005 à 0,02 % ; RE : de 0,001 à 0,01 % ; Nb : de 0,015 à 0,035 % ; O : de 0,003 à 0,01 % ; N : de 0,003 à 0,01 % ; le reste étant constitué de Fe et d'impuretés inévitables. Dans la barre de renforcement selon l'invention, le nombre de précipités contenant un composé Nb et présentant un diamètre équivalent de 0,003 à 0,03 µm est de 50 à 500/μm 2 ; le nombre total d'inclusions contenant un composé RE et/ou un composé Ti et présentant un diamètre équivalent de 0,03 à 3 µm est de 2000-4000/mm 2. Le procédé de fabrication selon l'invention comprend : la fusion, la régulation d'inclusions, la coulée continue, le chauffage de billettes coulées en continu et le laminage de barre de renforcement. Le procédé selon l'invention met en oeuvre la production à bas coût et de haute qualité de barres de renforcement nervurées 500 MPa.
(ZH)
一种500MPa级含铌螺纹钢筋及其制造方法,属于螺纹钢筋生产领域。该钢筋包括:C0.20~0.25%,Si0.5~0.8%,Mn1.2~1.6%,P0.01~0.04%,S0.01~0.04%,Ti0.005~0.02%,RE0.001~0.01%,Nb0.015~0.035%,O0.003~0.01%,N0.003~0.01%,余量为Fe和不可避免的杂质;该钢筋中,当量直径为0.003~0.03μm的含Nb化合物的析出物的数量为50~500个/μm 2;当量直径为0.03~3μm的含RE化合物和/或含Ti化合物的夹杂物的总数量为2000~4000个/mm 2。其制备方法为:冶炼、夹杂物控制、连铸、连铸坯加热、轧制钢筋。该方法实现500MPa级螺纹钢筋低成本高质量生产。
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