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1. (WO2017094487) HIGH-STRENGTH BOLT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/094487 International Application No.: PCT/JP2016/083738
Publication Date: 08.06.2017 International Filing Date: 15.11.2016
IPC:
C22C 38/00 (2006.01) ,C22C 38/54 (2006.01) ,F16B 35/00 (2006.01) ,C21D 9/00 (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
54
with boron
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
B
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
35
Screw-bolts; Stay bolts; Screw-threaded studs; Screws; Set screws
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
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:
根石 豊 NEISHI, Yutaka; JP
佐野 直幸 SANO, Naoyuki; JP
松井 直樹 MATSUI, Naoki; JP
Agent:
アセンド特許業務法人 ASCEND IP LAW FIRM; 大阪府大阪市北区堂島一丁目5番17号 5-17, Dojima 1-chome, Kita-ku, Osaka-shi, Osaka 5300003, JP
Priority Data:
2015-23772104.12.2015JP
Title (EN) HIGH-STRENGTH BOLT
(FR) BOULON À RÉSISTANCE ÉLEVÉE
(JA) 高強度ボルト
Abstract:
(EN) Provided is a high-strength bolt having high strength and exceptional hydrogen embrittlement resistance. The bolt according to the present invention has a chemical composition comprising 0.22-0.40% by mass of C, 0.10-1.50% by mass of Si, 0.20% by mass to less than 0.40% by mass of Mn, 0.020% by mass or less of P, 0.020% by mass or less of S, 0.70-1.45% by mass of Cr, 0.005-0.060% by mass of Al, 0.010-0.045% by mass of Ti, 0.0003-0.0040% by mass of B, 0.0015-0.0080% by mass of N, and 0.0020% by mass or less of O, and the remainder comprising Fe and impurities. The chemical composition satisfies formulae (1) and (2), and the bolt has a tensile strength of 1000-1300 MPa. (1) 0.50 ≤ C + Si/10 + Mn/5 + 5Cr/22 ≤ 0.85 (2) Si/Mn > 1.0 Each of the symbols for the elements in formulae (1) and (2) is assigned with the corresponding content content (mass%).
(FR) L'invention concerne un boulon à résistance élevée présentant une résistance élevée et une résistance exceptionnelle à la fragilisation par l'hydrogène. Le boulon selon la présente invention présente une composition chimique comprenant 0,22-0,40 % en masse de C, 0,10-1,50 % en masse de Si, 0,20 % en masse à moins de 0,40 % en masse de Mn, 0,020 % en masse ou moins de P, 0,020 % en masse ou moins de S, 0,70-1,45 % en masse de Cr, 0,005-0,060 % en masse d'Al, 0,010-0,045 % en masse de Ti, 0,0003-0,0040 % en masse de B, 0,0015-0,0080 % en masse de N et 0,0020 % en masse ou moins d'O, le reste comprenant du Fe et des impuretés. La composition chimique satisfait aux formules (1) et (2) et le boulon présente une résistance à la traction de 1000-1300 MPa. (1) 0,50 ≤ C + Si/10 + Mn/5 + 5 Cr/22 ≤ 0,85 (2) Si/Mn > 1,0. Chacun des symboles pour les éléments dans les formules (1) et (2) est associé à la teneur correspondante (% en masse).
(JA) 高強度を有し、かつ、優れた耐水素脆化特性を有する高強度ボルトを提供する。本発明によるボルトは、質量%で、C:0.22~0.40%、Si:0.10~1.50%、Mn:0.20~0.40%未満、P:0.020%以下、S:0.020%以下、Cr:0.70~1.45%、Al:0.005~0.060%、Ti:0.010~0.045%、B:0.0003~0.0040%、N:0.0015~0.0080%、及びO:0.0020%以下を含有し、残部はFe及び不純物からなり、式(1)及び式(2)を満たす化学組成を有し、1000~1300MPaの引張強度を有する。 0.50≦C+Si/10+Mn/5+5Cr/22≦0.85 (1) Si/Mn>1.0 (2) ここで、式(1)及び式(2)の各元素記号には、対応する元素の含有量(質量%)が代入される。
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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, JP, KE, KG, 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:
CN108291284KR1020180082543ID2018/08687IN201817019099EP3385398US20180347004