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1. (WO2018008194) ELECTROSEAMED STEEL PIPE FOR LINE PIPE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2018/008194 International Application No.: PCT/JP2017/010024
Publication Date: 11.01.2018 International Filing Date: 13.03.2017
IPC:
C22C 38/00 (2006.01) ,C21D 9/08 (2006.01) ,C22C 38/14 (2006.01) ,C22C 38/50 (2006.01) ,C21D 8/02 (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
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
14
containing titanium or zirconium
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
50
with titanium or zirconium
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
02
during manufacturing of plates or strips
Applicants:
新日鐵住金株式会社 NIPPON STEEL & SUMITOMO METAL CORPORATION [JP/JP]; 東京都千代田区丸の内二丁目6番1号 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071, JP
Inventors:
長井 健介 NAGAI, Kensuke; JP
尾▲崎▼ 雅和 OZAKI, Masakazu; JP
長谷川 昇 HASEGAWA, Noboru; JP
Agent:
特許業務法人太陽国際特許事務所 TAIYO, NAKAJIMA & KATO; 東京都新宿区新宿4丁目3番17号 3-17, Shinjuku 4-chome, Shinjuku-ku, Tokyo 1600022, JP
Priority Data:
2016-13428906.07.2016JP
Title (EN) ELECTROSEAMED STEEL PIPE FOR LINE PIPE
(FR) TUYAU EN ACIER ÉLECTROSOUDÉ POUR TUYAU DE CANALISATION
(JA) ラインパイプ用電縫鋼管
Abstract:
(EN) An electroseamed steel pipe for line pipe wherein: the chemical composition of the base metal section comprises, in mass%, C: 0.030% to less than 0.080%, Mn: 0.30-1.00%, Ti: 0.005-0.050%, Nb: 0.010-0.100%, N: 0.001-0.020%, Si: 0.010-0.450% and Al: 0.001-0.100%, the balance comprising Fe and impurities; CNeq represented by equation (1) is 0.190-0.320; Mn/Si ratio is at least 2.0; LR represented by equation (2) is at least 0.210; and when the metal structure of the base metal section is viewed at a 1000-fold magnification using SEM, the ferrite area ratio is 40-80% and the balance comprises tempered bainite. CNeq=C+Mn/6+Cr/5+(Ni+Cu)/15+Nb+Mo+V... Equation (1) LR=(2.1×C+Nb)/Mn... Equation (2)
(FR) L'invention concerne un tuyau en acier électrosoudé pour tuyau de canalisation, dans lequel : la composition chimique de la partie métal de base comprend, en % en masse, C : 0,030 % à moins de 0,080 %, Mn : 0,30-1,00 %, Ti: 0,005 à 0,050 %, Nb : 0,010 à 0,100 %, N : 0,001 à 0,020 %, Si : 0,010 à 0,450 % et Al : 0,001 à 0,100 %, le reste comprenant du Fe et des impuretés; CNeq, représenté par l'équation (1), est compris entre 0,190 et 0,320; le rapport Mn/Si est d'au moins 2,0; LR, représenté par l'équation (2), est d'au moins 0,210; et lorsque la structure métallique de la partie métal de base est observée à un grossissement de 1000 fois au moyen d'un MEB, le rapport surfacique de la ferrite est de 40 à 80 %, le reste comprenant de la bainite revenue. CNeq=C+Mn/6+Cr/5+(Ni+Cu)/15+Nb+Mo+V... Equation (1) : LR = (2,1×C+Nb)/Mn... Equation (2)
(JA) 母材部の化学組成が、質量%で、C:0.030%以上0.080%未満、Mn:0.30~1.00%、Ti:0.005~0.050%、Nb:0.010~0.100%、N:0.001~0.020%、Si:0.010~0.450%、及びAl:0.001~0.100%を含み、残部がFe及び不純物を含み、式(1)で示されるCNeqが0.190~0.320であり、Mn/Si比が2.0以上であり、式(2)で示されるLRが0.210以上であり、母材部の金属組織をSEMを用いて1000倍の倍率で観察した場合に、フェライト面積率が40~80%であり、残部が焼戻しベイナイトを含むラインパイプ用電縫鋼管。 CNeq=C+Mn/6+Cr/5+(Ni+Cu)/15+Nb+Mo+V … 式(1) LR=(2.1×C+Nb)/Mn … 式(2)
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, 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 Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)
Also published as:
JPWO2018008194KR1020180123519CN109072379EP3428299