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1. WO2022210124 - STEEL WIRE FOR MACHINE STRUCTURAL COMPONENT AND MANUFACTURING METHOD THEREFOR

Publication Number WO/2022/210124
Publication Date 06.10.2022
International Application No. PCT/JP2022/013270
International Filing Date 22.03.2022
IPC
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 9/52 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
52for wires; for strips
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 38/60 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
60containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
C21D 1/32 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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
26Methods of annealing
32Soft annealing, e.g. spheroidising
CPC
C21D 1/32
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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
26Methods of annealing
32Soft annealing, e.g. spheroidising
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
C21D 9/52
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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
52for wires; for strips ; ; for rods of unlimited length
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/60
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
60containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Applicants
  • 株式会社神戸製鋼所 KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) [JP]/[JP]
Inventors
  • 松本 洋介 MATSUMOTO, Yosuke
  • 池田 憲史 IKEDA, Kenshi
  • 高知 琢哉 KOCHI, Takuya
  • 坂田 昌之 SAKATA, Masayuki
  • 内田 辰徳 UCHIDA, Tatsunori
  • 山下 浩司 YAMASHITA, Koji
  • 井上 悠太 INOUE, Yuta
Agents
  • 山尾 憲人 YAMAO, Norihito
Priority Data
2021-06157231.03.2021JP
2021-21149824.12.2021JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) STEEL WIRE FOR MACHINE STRUCTURAL COMPONENT AND MANUFACTURING METHOD THEREFOR
(FR) FIL D'ACIER POUR ÉLÉMENT DE STRUCTURE DE MACHINE ET SON PROCÉDÉ DE FABRICATION
(JA) 機械構造部品用鋼線およびその製造方法
Abstract
(EN) Provided is a steel wire for a machine structural component, the steel wire containing 0.05 mass% to 0.60 mass% C, 0.005 mass% to 0.50 mass% Si, 0.30 mass% to 1.20 mass% Mn, more than 0 mass% to at most 0.050 mass% P, more than 0 mass% to at most 0.050 mass% S, 0.001 mass% to 0.10 mass% Al, more than 0 mass% to at most 1.5 mass% Cr, and more than 0 mass% to at least 0.02 mass% N, with the remainder comprising iron and unavoidable impurities. The surface area of cementite present at a ferrite crystal grain boundary is at least 32% in relation to the surface area of the cementite as a whole, and, when the amount (mass%) of C in the steel is represented by [C], the average equivalent circle diameter of the cementite as a whole is (1.668 - 2.13[C]) µm to (1.863 - 2.13[C]) µm, inclusive.
(FR) L'invention concerne un fil d'acier pour un élément de structure de machine, le fil d'acier contenant 0,05 % en masse à 0,60 % en masse de C, 0,005 % en masse à 0,50 % en masse de Si, 0,30 % en masse à 1,20 % en masse de Mn, plus de 0 % en masse à au plus 0,050 % en masse de P, plus de 0 % en masse à au plus 0,050 % en masse de S, 0,001 % en masse à 0,10 % en masse d'Al, plus de 0 % en masse à au plus 1,5 % en masse de Cr, et plus de 0 % en masse à au moins 0,02 % en masse de N, le reste comprenant du fer et des impuretés inévitables. La surface de la cémentite présente à une limite de grains cristallins de ferrite est d'au moins 32 % par rapport à la surface de la cémentite dans son ensemble, et, lorsque la quantité (% en masse) de C dans l'acier est représentée par [C], le diamètre de cercle équivalent moyen de la cémentite dans son ensemble est de (1,668 - 2,13 [C]) µm à (1,863 - 2,13 [C]) µm (inclus).
(JA) C:0.05質量%~0.60質量%、Si:0.005質量%~0.50質量%、Mn:0.30質量%~1.20質量%、P:0質量%超、0.050質量%以下、S:0質量%超、0.050質量%以下、Al:0.001質量%~0.10質量%、Cr:0質量%超、1.5質量%以下、およびN:0質量%超、0.02質量%以下を含有し、残部が鉄および不可避不純物からなり、フェライト結晶粒界に存在するセメンタイトの面積が、全セメンタイトの面積に対して32%以上であり、且つ全セメンタイトの平均円相当直径が、鋼中のC量(質量%)を[C]で表したときに、(1.668-2.13[C])μm以上、(1.863-2.13[C])μm以下である、機械構造部品用鋼線。
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