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1. WO2016068009 - AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2016/068009
Publication Date 06.05.2016
International Application No. PCT/JP2015/079800
International Filing Date 22.10.2015
IPC
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C21D 8/00 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
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
C22C 38/58 2006.1
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
58with more than 1.5% by weight of manganese
CPC
C21D 2211/001
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
2211Microstructure comprising significant phases
001Austenite
C21D 2211/004
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
2211Microstructure comprising significant phases
004Dispersions; Precipitations
C21D 6/004
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
004containing Cr and Ni
C21D 6/005
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, e.g. BY DECARBURISATION OR TEMPERING
6Heat treatment of ferrous alloys
005containing Mn
C21D 6/008
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, e.g. BY DECARBURISATION OR TEMPERING
6Heat treatment of ferrous alloys
008containing Si
C21D 8/005
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, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
005of ferrous alloys
Applicants
  • 新日鐵住金株式会社 NIPPON STEEL & SUMITOMO METAL CORPORATION [JP]/[JP]
Inventors
  • 中村 潤 NAKAMURA, Jun
  • 大村 朋彦 OMURA, Tomohiko
  • 平田 弘征 HIRATA, Hiroyuki
  • 浄徳 佳奈 JOTOKU, Kana
  • 小薄 孝裕 OSUKI, Takahiro
Agents
  • 上羽 秀敏 UEBA, Hidetoshi
Priority Data
2014-22055329.10.2014JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR
(FR) ACIER INOXYDABLE AUSTÉNITIQUE ET SON PROCÉDÉ DE FABRICATION
(JA) オーステナイトステンレス鋼及びその製造方法
Abstract
(EN)
Provided is a high strength austenitic stainless steel with favorable hydrogen embrittlement resistance and hydrogen fatigue resistance. For the austenitic stainless steel, the chemical composition contains, in mass%, at least one of C: not more than 0.10%, Si: not more than 1.0%, Mn: at least 3.0% and less than 7.0%, Cr: 15-30%, Ni: at least 12.0% and less than 17.0%, Al: not more than 0.10%, N: 0.10-0.50%, P: not more than 0.050%, S: not more than 0.050%, V: 0.01-1.0%, Nb: 0.01-0.50%, etc. with the remainder being Fe and impurities. The ratio of the minor axis to the major axis of the austenite crystal particles is greater than 0.1. The crystal grain size number of the austenite crystal particles is at least 8.0. Tensile strength is at least 1000 MPa.
(FR)
L’invention porte sur un acier inoxydable austénitique à haute résistance qui présente une résistance à la fragilisation due à l’hydrogène et une résistance à la fatigue due à l’hydrogène favorables. Pour l’acier inoxydable austénitique, la composition chimique contient, en % en masse, pas plus de 0,10 % de C, pas plus de 1,0 % de Si, au moins 3,0 % et moins de 7,0 % de Mn, 15 à 30 % de Cr, au moins 12,0 % et moins de 17,0 % de Ni, pas plus de 0,10 % d’Al, 0,10 à 0,50 % de N, pas plus de 0,050 % de P, pas plus de 0,050 % de S, 0,01 à 1,0 % de V et/ou 0,01 à 0,50 % de Nb, etc., le reste étant du Fe et des impuretés. Le rapport du petit axe au grand axe des particules cristallines d’austénite est supérieur à 0,1. L’indice de taille des grains cristallins des particules cristallines d’austénite est d’au moins 8,0. La résistance à la traction est d’au moins 1000 MPa.
(JA)
 耐水素脆性及び耐水素疲労特性が良好な高強度のオーステナイトステンレス鋼を提供する。オーステナイトステンレス鋼は、化学組成が、質量%で、C:0.10%以下、Si:1.0%以下、Mn:3.0%以上7.0%未満、Cr:15~30%、Ni:12.0%以上17.0%未満、Al:0.10%以下、N:0.10~0.50%、P:0.050%以下、S:0.050%以下、V:0.01~1.0%及びNb:0.01~0.50%の少なくとも一種、等を含有し、残部:Fe及び不純物であり、オーステナイト結晶粒の長径に対する短径の比が0.1よりも大きく、前記オーステナイト結晶粒の結晶粒度番号が8.0以上であり、引張強度が1000MPa以上である。
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