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1. WO2019169549 - CAST STEEL MICRO-ALLOYED WITH RARE EARTH

Publication Number WO/2019/169549
Publication Date 12.09.2019
International Application No. PCT/CN2018/078147
International Filing Date 06.03.2018
IPC
C22C 38/14 2006.1
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 33/06 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
04by melting
06using master alloys
C21D 6/00 2006.1
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
6Heat treatment of ferrous alloys
CPC
C21D 6/00
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
6Heat treatment of ferrous alloys
C22C 33/06
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
04by melting
06using master alloys
C22C 38/14
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
Applicants
  • 高海艇 GAO, Haiting [CN]/[CN]
Inventors
  • 高海艇 GAO, Haiting
Agents
  • 北京商专永信知识产权代理事务所(普通合伙) SBZL IP LAW OFFICE
Priority Data
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) CAST STEEL MICRO-ALLOYED WITH RARE EARTH
(FR) ACIER COULÉ MICRO-ALLIÉ AUX TERRES RARES
(ZH) 一种微合金化稀土铸钢
Abstract
(EN) A cast steel micro-alloyed with rare earth. The cast steel has a chemical composition mainly comprising C, Si, Mn, Nb, Ti, Re, La, Ce, P, S, iron and trace impurities, wherein the contents of C, Si, Mn, Nb, Ti, Re, P and S, in mass percentage, are 0.40%-0.5% of C, 0.20%-0.30% of Si, 1.5%-1.69% of Mn, 0.1%-0.8% of Nb, 0.05%-0.12% of Ti, 0.02%-0.22% of Re, 0.01%-0.14% of La, 0.01%-0.19% of Ce, P ≤ 0.045%, and S ≤ 0.020%, respectively, and the total contents of Nb, Ti, La and Ce are less than or equal to 0.6%. The cast steel micro-alloyed with rare earth can greatly increase the yield strength and tensile strength without significantly reducing the plasticity and toughness. Compared to a common 35SiMn steel, the yield strength of the cast steel micro-alloyed with rare earth is increased by more than 60MPa and the tensile strength thereof is increased by more than 95MPa.
(FR) L'invention concerne un acier coulé micro-allié aux terres rares. L'acier coulé a une composition chimique comprenant principalement C, Si, Mn, Nb, Ti, Re, La, Ce, P, S, du fer et des impuretés à l'état de trace, les teneurs en C, Si, Mn, Nb, Ti, Re, P et S, en pourcentage en masse, étant respectivement de 0,40 % à 0,5 % de C, de 0,20 % à 0,30 % de Si, de 1,5 % à 1,69 % de Mn, de 0,1 % à 0,8 % de Nb, de 0,05 % à 0,12 % de Ti, de 0,02 % à 0,22 % de Re, de 0,01 % à 0,14 % de La, de 0,01 % à 0,19 % de Ce, de 0,045 % ou moins de P, et de 0,020 % ou moins de S, et les teneurs totales en Nb, Ti, La et Ce sont inférieures ou égales à 0,6 %. L'acier coulé micro-allié aux terres rares permet d'augmenter considérablement la limite d'élasticité et la résistance à la traction sans réduire significativement la plasticité et la ténacité. Par rapport à un acier 35SiMn commun, la limite d'élasticité de l'acier coulé micro-allié aux terres rares est augmentée de plus de 60 MPa et sa résistance à la traction est augmentée de plus de 95 MPa.
(ZH) 一种微合金化稀土铸钢,铸钢的主要化学成分包括C、Si、Mn、Nb、Ti、Re、La、Ce、P、S、铁以及微量杂质元素,所述C、Si、Mn、Nb、Ti、Re、P、S的质量百分含量分别为C 0.40%~0.5%,Si0.20%~0.30%,Mn 1.5%~1.69%,Nb0.1%~0.8%,Ti 0.05~0.12%,Re 0.02%~0.22%,La0.01%~0.14%,Ce0.01%~0.19%,P≤0.045%,S≤0.020%;Nb、Ti、La、Ce的总含量小于或等于0.6%。所述微合金化稀土铸钢在不明显降低塑性和韧性的条件下,显著提高屈服强度和抗拉强度。所述微合金化稀土铸钢与普通35SiMn钢相比,其屈服强度可以提高60MPa以上,抗拉强度可以提高95MPa以上。
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