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1. WO2021045143 - STEEL FOR KNIVES, STEEL FOR MARTENSITIC KNIVES, KNIFE, AND PRODUCTION METHOD FOR STEEL FOR MARTENSITIC KNIVES

Publication Number WO/2021/045143
Publication Date 11.03.2021
International Application No. PCT/JP2020/033402
International Filing Date 03.09.2020
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
C21D 9/18 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
18for knives, scythes, scissors, or like hand cutting tools
C22C 38/22 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
22with molybdenum or tungsten
C22C 38/48 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
48with niobium or tantalum
C21D 9/46 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
46for sheet metals
CPC
C21D 9/18
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
18for knives, scythes, scissors, or like hand cutting tools
C21D 9/46
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
46for sheet metals
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 38/22
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
22with molybdenum or tungsten
C22C 38/48
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
48with niobium or tantalum
Applicants
  • 日立金属株式会社 HITACHI METALS,LTD. [JP]/[JP]
Inventors
  • 福本 賢太郎 FUKUMOTO Kentaro
Priority Data
2019-16337806.09.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) STEEL FOR KNIVES, STEEL FOR MARTENSITIC KNIVES, KNIFE, AND PRODUCTION METHOD FOR STEEL FOR MARTENSITIC KNIVES
(FR) ACIER POUR COUTEAUX, ACIER MARTENSITIQUE POUR COUTEAUX, COUTEAU ET PROCÉDÉ DE PRODUCTION D'ACIER MARTENSITIQUE POUR COUTEAUX
(JA) 刃物用鋼、マルテンサイト系刃物用鋼、刃物、およびマルテンサイト系刃物用鋼の製造方法
Abstract
(EN)
Provided are: steel for knives, having a higher hardness and better corrosion resistance than conventional steel for knives; a knife; steel for martensitic knives; and a production method for same. The steel for knives comprises a component composition containing, in mass%, 0.45%–1.00% C, 0.1%–1.5% Si, 0.1%–1.5% Mn, 7.5%–11.0% Cr, and 0.5%–3.0% of either Mo or W or a complex of both (Mo + W/2), with the remainder being Fe and unavoidable impurities. Also provided are steel for martensitic knives and a knife. A production method for steel for martensitic knives is also provided that includes a quenching temperature at quenching of 1,050–1,250°C, a processing temperature for subzero processing of no more than –50°C, and a tempering temperature at tempering of 100–400°C, and obtains steel for martensitic knives that has a hardness of at least 700 HV.
(FR)
L'invention concerne : de l'acier pour couteaux, présentant une dureté supérieure et une meilleure résistance à la corrosion que l'acier pour couteaux classique ; un couteau ; de l'acier martensitique pour couteaux ; ainsi qu'un procédé de production associé. L'acier pour couteaux selon l'invention comprend une composition de composants contenant, en % en masse, de 0,45 à 1,00 % de C, de 0,1 à 1,5 % de Si, de 0,1 à 1,5 % de Mn, de 7,5 à 11,0 % de Cr, et de 0,5 à 3,0 % de Mo ou de W ou d'un complexe des deux (Mo + W/2), le reste étant constitué de Fe et d'impuretés inévitables. L'invention concerne également de l'acier martensitique pour couteaux, ainsi qu'un couteau. L'invention concerne encore un procédé de production d'acier martensitique pour couteaux, comprenant une température de trempe de 1 050 à 1 250 °C, une température de traitement sous-zéro non supérieure à –50 °C, ainsi qu'une température de revenu de 100 à 400 °C, et permettant d'obtenir de l'acier martensitique pour couteaux qui présente une dureté d'au moins 700 HV.
(JA)
従来よりもさらに高硬度かつ耐食性に優れた刃物用鋼、刃物、マルテンサイト系刃物用鋼およびその製造方法を提供する。 質量%で、C:0.45~1.00%、Si:0.1~1.5%、Mn:0.1~1.5%、Cr:7.5~11.0%、MoおよびWは単独または複合で(Mo+W/2):0.5~3.0%を含有し、残部Feおよび不可避的不純物の成分組成からなる刃物用鋼、マルテンサイト系刃物用鋼および刃物。また焼入れ時の焼入れ温度を1050~1250℃、サブセロ処理時の処理温度を-50℃以下、焼戻し時の焼戻し温度を100~400℃とし、700HV以上の硬度を有するマルテンサイト系刃物用鋼を得る、マルテンサイト系刃物用鋼の製造方法。
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