Processing

Please wait...

Settings

Settings

Goto Application

1. WO2017094870 - ROLLING ROD FOR COLD-FORGED THERMALLY REFINED ARTICLE

Publication Number WO/2017/094870
Publication Date 08.06.2017
International Application No. PCT/JP2016/085854
International Filing Date 02.12.2016
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
C22C 38/54 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
54with boron
F16B 35/00 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
35Screw-bolts; Stay bolts; Screw-threaded studs; Screws; Set screws
C21D 8/06 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
06during manufacturing of rods or wires
C21D 9/00 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
CPC
C21D 2211/002
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
002Bainite
C21D 2211/005
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
2211Microstructure comprising significant phases
005Ferrite
C21D 2211/009
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
009Pearlite
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 8/06
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
06during manufacturing of rods or wires
Applicants
  • 新日鐵住金株式会社 NIPPON STEEL & SUMITOMO METAL CORPORATION [JP]/[JP]
Inventors
  • 佐野 直幸 SANO, Naoyuki
  • 松井 直樹 MATSUI, Naoki
  • 根石 豊 NEISHI, Yutaka
Agents
  • アセンド特許業務法人 ASCEND IP LAW FIRM
Priority Data
2015-23772104.12.2015JP
2016-02198408.02.2016JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) ROLLING ROD FOR COLD-FORGED THERMALLY REFINED ARTICLE
(FR) BARRE DE LAMINAGE POUR ARTICLE FORGÉ À FROID AFFINÉ THERMIQUEMENT
(JA) 冷間鍛造調質品用圧延棒線
Abstract
(EN) Provided is a rolling rod for a cold-forged thermally refined article, the rolling rod having superior cold workability, and, when subjected to cold forging and thermal refining, a high strength and superior anti hydrogen embrittlement properties. A rolling rod for a cold-forged thermally refined article according to the present invention contains, in terms of % by mass: 0.22-0.40 % C; 0.35-1.5 % Si; 0.20-0.40 % Mn; less than 0.020 % P; less than 0.015 % S; 0.70-1.45 % Cr; 0.005-0.060 % Al; 0.01-0.05 % Ti; 0.0003-0.0040 % B; 0.0020-0.0080 % N; and less than or equal to 0.0020 % O, wherein the balance includes Fe and impurities. The rolling rod has a chemical composition that satisfies expressions (1) and (2), wherein the total fractional area of proeutectoid ferrite and perlite is 90 % or greater, the fractional area of the proeutectoid ferrite is 30 % or greater, and the tensile strength is 700 MPa or less. 0.50 ≤ C + Si/10 + Mn/5 + 5Cr/22 ≤ 0.85 (1) Si/Mn > 1.0 (2)
(FR) L'invention concerne une barre de laminage pour article forgé à froid affiné thermiquement, la barre de laminage ayant une excellente aptitude au façonnage à froid et, quand elle est soumise à un forgeage à froid et à un affinage thermique, une résistance élevée et des propriétés supérieures de résistance à la fragilisation par l'hydrogène. Une barre de laminage pour article forgé à froid affiné thermiquement selon la présente invention contient, en termes de % en masse : 0,22 à 0,40 % de C; 0,35 à 1,5 % de Si; 0,20 à 0,40 % de Mn; moins de 0,020 % de P; moins de 0,015 % de S; 0,70 à 1,45 % de Cr; 0,005 à 0,060 % d'Al; 0,01 à 0,05 % de Ti; 0,0003 à 0,0040 % de B; 0,0020 à 0,0080 % de N; et une quantité inférieure ou égale à 0,0020 % de O, le reste étant constitué de Fe et d'impuretés. La barre de laminage présente une composition chimique qui satisfait aux expressions (1) et (2), la fraction surfacique totale de ferrite proeutectoïde et de perlite représente 90 % ou plus, la fraction surfacique de ferrite proeutectoïde représente 30 % ou plus et la résistance à la traction est inférieure ou égale à 700 MPa. 0,50 ≤ C + Si/10 + Mn/5 + 5Cr/22 ≤ 0,85 (1) Si/Mn > 1,0 (2)
(JA) 優れた冷間加工性と、冷間鍛造及び調質処理された場合、高い強度及び優れた耐水素脆化特性とを有する冷間鍛造調質品用圧延棒線を提供する。本発明による冷間鍛造調質品用圧延棒線は、質量%で、C:0.22~0.40%、Si:0.35~1.5%、Mn:0.20~0.40%、P:0.020%未満、S:0.015%未満、Cr:0.70~1.45%、Al:0.005~0.060%、Ti:0.01~0.05%、B:0.0003~0.0040%、N:0.0020~0.0080%、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、初析フェライト及びパーライトの総面積率は90%以上、初析フェライトの面積率は30%以上で、700MPa以下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)
Latest bibliographic data on file with the International Bureau