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1. WO2020138450 - STEEL MATERIAL CAPABLE OF BEING USED AS RAW MATERIAL FOR CARBONITRIDED BEARING COMPONENT

Publication Number WO/2020/138450
Publication Date 02.07.2020
International Application No. PCT/JP2019/051503
International Filing Date 27.12.2019
IPC
C22C 38/00 2006.01
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 2006.01
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
C21D 1/06 2006.01
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
06Surface hardening
C21D 8/06 2006.01
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 9/40 2006.01
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
40for rings; for bearing races
CPC
C21D 1/06
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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
06Surface hardening
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 9/40
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
40for rings; for bearing races
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 38/54
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
Y02P 10/20
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
20Recycling
Applicants
  • 日本製鉄株式会社 NIPPON STEEL CORPORATION [JP]/[JP]
  • 株式会社ジェイテクト JTEKT CORPORATION [JP]/[JP]
Inventors
  • 根石 豊 NEISHI, Yutaka
  • 山下 朋広 YAMASHITA, Tomohiro
  • 平上 大輔 HIRAKAMI, Daisuke
  • 鈴木 崇久 SUZUKI, Takahisa
  • 小山 達也 KOYAMA, Tatsuya
  • 佐田 隆 SADA, Takashi
  • 金谷 康平 KANETANI, Kohei
Agents
  • アセンド特許業務法人 ASCEND IP LAW FIRM
Priority Data
2018-24569927.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) STEEL MATERIAL CAPABLE OF BEING USED AS RAW MATERIAL FOR CARBONITRIDED BEARING COMPONENT
(FR) MATÉRIAU D'ACIER APTE À ÊTRE UTILISÉ COMME MATIÈRE PREMIÈRE POUR COMPOSANT DE PALIER CARBONITRURÉ
(JA) 浸炭窒化軸受部品の素材となる鋼材
Abstract
(EN)
Provided is a steel material which can be used as a raw material for a carbonitrided bearing component, and which has excellent machinability and can have excellent wear resistance, core part toughness and delamination life associated with the change in composition under a hydrogen-generating environment after being subjected to a carbonitriding treatment. The steel material has a chemical composition comprising, in % by mass, 0.15 to 0.45% of C, 0.50% or less of Si, 0.20 to 0.60% of Mn, 0.015% or less of P, 0.005% or less of S, 0.80 to 1.50% of Cr, 0.17 to 0.30% of Mo, 0.24 to 0.40% of V, 0.005 to 0.100% of Al, 0.0300% or less of N and 0.0015% or less of O, with the remainder made up by Fe and impurities, and satisfies the requirements represented by formulae (1) to (4) shown in the embodiments, wherein the total area ratio of ferrite and perlite in a microstructure is 10.0% or more, and the ratio of the content (% by mass) of V in an electrolytic extraction residue to the content (% by mass) of V in the chemical composition is 10.0% or less.
(FR)
L'invention concerne un matériau d'acier qui peut être utilisé comme une matière première pour un composant de palier carbonitruré, et qui présente une excellente usinabilité et qui peut présenter une excellente résistance à l'usure, une robustesse de partie de noyau et durée de vie de délaminage associées au changement de composition dans un environnement de génération d'hydrogène après avoir été soumis à un traitement de carbonitruration. Le matériau d'acier a une composition chimique comprenant, en % en masse, 0,15 à 0,45 % de C, 0,50 % ou moins de Si, 0,20 à 0,60 % de Mn, 0,015 % ou moins de P, 0,005 % ou moins de S, 0,80 à 1,50 % de Cr, 0,17 à 0,30 % de Mo, 0,24 à 0,40 % de V, 0,005 à 0,100 % d'Al, 0,0300 % ou moins de N et 0,0015 % ou moins de O, le reste étant constitué de Fe et d'impuretés, et satisfaisant aux exigences représentées par les formules (1) à (4) présentées dans les modes de réalisation, le rapport de surface totale de ferrite et de perlite dans une microstructure étant de 10,0 % ou plus, et le rapport du contenu (% en masse) de V dans un résidu d'extraction électrolytique par rapport à la teneur (% en masse) de V dans la composition chimique est de 10,0 % ou moins.
(JA)
被削性に優れ、浸炭窒化処理後において、耐摩耗性、芯部の靱性、及び、水素発生環境下での組織変化に伴う剥離寿命に優れる、浸炭窒化軸受部品の素材となる鋼材を提供する。鋼材は、化学組成が、質量%で、C:0.15~0.45%、Si:0.50%以下、Mn:0.20~0.60%、P:0.015%以下、S:0.005%以下、Cr:0.80~1.50%、Mo:0.17~0.30%、V:0.24~0.40%、Al:0.005~0.100%、N:0.0300%以下、O:0.0015%以下、及び、残部がFe及び不純物からなり、実施形態に記載の式(1)~式(4)を満たし、ミクロ組織におけるフェライト及びパーライトの総面積率が10.0%以上であり、化学組成中のV含有量(質量%)に対する、電解抽出残渣中のV含有量(質量%)の割合が10.0%以下である。
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