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1. (WO2018139671) STEEL PIPE FOR UNDERBODY COMPONENTS OF AUTOMOBILES, AND UNDERBODY COMPONENT OF AUTOMOBILES
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Pub. No.: WO/2018/139671 International Application No.: PCT/JP2018/002958
Publication Date: 02.08.2018 International Filing Date: 30.01.2018
IPC:
C22C 38/00 (2006.01) ,C22C 38/58 (2006.01) ,C21D 8/10 (2006.01) ,C21D 9/08 (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
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
58
with more than 1.5% by weight of manganese
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
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:
坂本 真也 SAKAMOTO, Shinya; JP
福士 孝聡 FUKUSHI, Takaaki; JP
荒井 勇次 ARAI, Yuji; JP
川本 卓磨 KAWAMOTO, Takuma; JP
Agent:
特許業務法人ブライタス BRIGHTAS IP ATTORNEYS; 大阪府大阪市北区曽根崎2丁目5番10号 2-5-10, Sonezaki, Kita-ku, Osaka-shi, Osaka 5300057, JP
Priority Data:
2017-01475830.01.2017JP
Title (EN) STEEL PIPE FOR UNDERBODY COMPONENTS OF AUTOMOBILES, AND UNDERBODY COMPONENT OF AUTOMOBILES
(FR) TUYAU EN ACIER POUR PIÈCES DE DESSOUS DE CAISSE D'AUTOMOBILES, ET PIÈCE DE DESSOUS DE CAISSE D'AUTOMOBILES
(JA) 自動車足回り部品用鋼管および自動車足回り部品
Abstract:
(EN) A steel pipe for underbody components of automobiles, which has a chemical composition that contains, in mass%, 0.10-0.60% of C, 0.25-1.0% of Si, 0.05-2.0% of Mn, 0.1% or less of P, 0.03% or less of S, 0.005-0.1% of Al, 0.01% or less of N, 0.01% or less of O, 0.0005-0.005% of Ca, 0.20-1.5% of Mo, 0.01-0.05% of Ti, 0.0001-0.01% of B, 0-1.0% of Ni, 0-1.0% of Cu, 0-1.5% of Cr, 0-0.2% of Nb, 0-0.2% of V, 0-0.02% of Mg and 0-0.02% of REM, with the balance made up of Fe and impurities, while satisfying [5.0 ≤ (0.001 + Ca) × Al × Ti/(Mn × S) × 104 ≤ 60.0] and [2.0 ≤ 3 × Si × Mo × B × 104]. This steel pipe for underbody components of automobiles has a metal structure wherein the area ratio of cementite is 5-70% and the spheroidization rate of cementite is 70% or more.
(FR) L'invention porte sur un tuyau en acier pour des pièces de dessous de caisse d'automobiles, qui a une composition chimique qui contient, en % en masse, de 0,10 à 0,60 % de C, de 0,25 à 1,0 % de Si, de 0,05 à 2,0 % de Mn, 0,1 % ou moins de P, 0,03 % ou moins de S, de 0,005 à 0,1 % d'Al, 0,01 % ou moins de N, 0,01 % ou moins d'O, de 0,0005 à 0 005 % de Ca, de 0,20 à 1,5 % de Mo, de 0,01 à 0,05 % de Ti, de 0,0001 à 0,01 % de B, de 0 à 1,0 % de Ni, de 0 à 1,0 % de Cu, de 0 à 1,5 % de Cr, de 0 à 0,2 % de Nb, de 0 à 0,2 % de V, de 0 à 0,02 % de Mg et de 0 à 0,02 % de terres rares, le reste étant constitué de Fe et d'impuretés, tout en satisfaisant les conditions suivantes : [5,0 ≤ (0,001 + Ca) × Al × Ti/(Mn × S) × 104 ≤ 60,0] et [2,0 ≤ 3 × Si × Mo × B × 104]. Ce tuyau en acier pour pièces de dessous de caisse d'automobiles a une structure métallique dans laquelle le rapport de surface de la cémentite va de 5 à 70 % et le taux de sphéroïdisation de la cémentite est supérieur ou égal à 70 %.
(JA) 質量%で、C:0.10~0.60%、Si:0.25~1.0%、Mn:0.05~2.0%、P:0.1%以下、S:0.03%以下、Al:0.005~0.1%、N:0.01%以下、O:0.01%以下、Ca:0.0005~0.005%、Mo:0.20~1.5%、Ti:0.01~0.05%、B:0.0001~0.01%、Ni:0~1.0%、Cu:0~1.0%、Cr:0~1.5%、Nb:0~0.2%、V:0~0.2%、Mg:0~0.02%、REM:0~0.02%、残部:Feおよび不純物であり、[5.0≦(0.001+Ca)×Al×Ti/(Mn×S)×10≦60.0]および[2.0≦3×Si×Mo×B×10]を満足する化学組成を有し、セメンタイトの面積率が5~70%であり、セメンタイトの球状化率が70%以上である金属組織を有する、自動車足回り部品用鋼管。
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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)