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1. (WO2018043214) DUPLEX STAINLESS STEEL AND METHOD FOR MANUFACTURING SAME
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2018/043214 International Application No.: PCT/JP2017/029963
Publication Date: 08.03.2018 International Filing Date: 22.08.2017
IPC:
C22C 38/00 (2006.01) ,C21D 8/10 (2006.01) ,C21D 9/08 (2006.01) ,C22C 38/44 (2006.01) ,C22C 38/60 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
8
Modifying the physical properties by deformation combined with, or followed by, heat treatment
10
during manufacturing of tubular bodies
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
9
Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor
08
for tubular bodies or pipes
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
44
with molybdenum or tungsten
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
60
containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
Applicants:
JFEスチール株式会社 JFE STEEL CORPORATION [JP/JP]; 東京都千代田区内幸町二丁目2番3号 2-3, Uchisaiwai-cho 2-chome, Chiyoda-ku, Tokyo 1000011, JP
Inventors:
吉村 悠佑 YOSHIMURA Yusuke; JP
太田 裕樹 OTA Hiroki; JP
柚賀 正雄 YUGA Masao; JP
加茂 祐一 KAMO Yuichi; JP
江口 健一郎 EGUCHI Kenichiro; JP
Agent:
熊坂 晃 KUMASAKA Akira; JP
森 和弘 MORI Kazuhiro; JP
井上 茂 INOUE Shigeru; JP
Priority Data:
2016-17158302.09.2016JP
Title (EN) DUPLEX STAINLESS STEEL AND METHOD FOR MANUFACTURING SAME
(FR) ACIER INOXYDABLE DUPLEX ET PROCÉDÉ POUR SA FABRICATION
(JA) 二相ステンレス鋼およびその製造方法
Abstract:
(EN) Provided is a duplex stainless steel having excellent corrosion resistance, in which excellent carbon dioxide corrosion resistance, excellent sulfide stress corrosion cracking resistance, and excellent sulfide stress cracking resistance are provided at the same time. The present invention has a composition containing, in terms of mass%, 0.03% or less of C, 1.0% or less of Si, 0.10-1.5% Mn, 0.030% or less of P, 0.005% or less of S, 20.0-30.0% Cr, 5.0-10.0% Ni, 2.0-5.0% Mo, 2.0-6.0% Cu, and less than 0.07% of N, the remainder comprising Fe and unavoidable impurities, and the metallographic structure of the present invention has an austenitic phase that is 20-70% by volume ratio and a ferritic phase that is 30-80% by volume ratio.
(FR) L'invention concerne un acier inoxydable duplex présentant une excellente résistance à la corrosion, dans lequel une excellente résistance à la corrosion au dioxyde de carbone, une excellente résistance à la fissuration par corrosion sous contrainte de sulfure et une excellente résistance à la fissuration sous contrainte de sulfure sont réalisées en même temps. La présente invention présente une composition contenant, en termes de % en masse, 0,03 % ou moins de C, 1,0 % ou moins de Si, 0,10 à 1,5 % de Mn, 0,030 % ou moins de P, 0,005 % ou moins de S, 20,0 à 30,0 % de Cr, 5,0 à 10,0 % de Ni, 2,0 à 5,0 % de Mo, 2,0 à 6,0 % de Cu et moins de 0,07 % de N, le reste comprenant du Fe et des impuretés inévitables et la structure métallographique de la présente invention présente une phase austénitique qui est de 20-70 % en rapport volumique et une phase ferritique qui est de 30-80 % en rapport volumique.
(JA) 優れた耐炭酸ガス腐食性と優れた耐硫化物応力腐食割れ性および優れた耐硫化物応力割れ性とを兼ね備えた、耐食性に優れた二相ステンレス鋼を提供する。質量%で、C:0.03%以下、Si:1.0%以下、Mn:0.10~1.5%、P:0.030%以下、S:0.005%以下、Cr:20.0~30.0%、Ni:5.0~10.0%、Mo:2.0~5.0%、Cu:2.0~6.0%、N:0.07%未満を含有し、残部Feおよび不可避的不純物からなる組成を有し、組織は、体積率で20~70%のオーステナイト相と30~80%のフェライト相を有する。
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)