WO2015146703A1 - Matériau en acier apte à la cémentation sous vide et son procédé de production - Google Patents

Matériau en acier apte à la cémentation sous vide et son procédé de production Download PDF

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Publication number
WO2015146703A1
WO2015146703A1 PCT/JP2015/057833 JP2015057833W WO2015146703A1 WO 2015146703 A1 WO2015146703 A1 WO 2015146703A1 JP 2015057833 W JP2015057833 W JP 2015057833W WO 2015146703 A1 WO2015146703 A1 WO 2015146703A1
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WO
WIPO (PCT)
Prior art keywords
less
fatigue strength
steel material
steel
mass
Prior art date
Application number
PCT/JP2015/057833
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English (en)
Japanese (ja)
Inventor
正樹 貝塚
新堂　陽介
成朗 岡本
Original Assignee
株式会社神戸製鋼所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Priority to MX2016012061A priority Critical patent/MX2016012061A/es
Priority to KR1020167028788A priority patent/KR101860658B1/ko
Priority to CN201580014824.7A priority patent/CN106103777B/zh
Publication of WO2015146703A1 publication Critical patent/WO2015146703A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like

Definitions

  • the chemical component composition is appropriately adjusted and the average equivalent circle diameter of vanadium carbide is set to a predetermined value or less, so that the surface carburizing strength after vacuum carburizing treatment is excellent, and the vacuum carburizing is performed. And carburized parts excellent in bending fatigue strength after shot peening can be obtained.
  • the carburized parts of the present invention are also characterized in that they are obtained by vacuum carburizing.
  • vacuum carburization is not performed and gas carburization, gas carbonitriding, or the like is performed, a grain boundary oxide layer is generated on the surface, and surface fatigue strength and bending fatigue strength described later are reduced.
  • the surface grain boundary oxide layer depth can be 3 ⁇ m or less.
  • Mo 0.3-0.8%
  • Mo has the effect of improving the softening resistance by precipitating Mo 2 C during tempering.
  • the hardness is maintained by suppressing the softening and pitching. Contributes to improving fatigue strength such as strength.
  • Mo also has the effect of improving toughness.
  • the Mo amount is set to 0.3% or more.
  • the amount of Mo is preferably 0.35% or more, and more preferably 0.4% or more.
  • the Mo amount is set to 0.8% or less. Mo amount becomes like this. Preferably it is 0.75% or less, More preferably, it is 0.7% or less.
  • N 0.004 to 0.025%
  • N forms nitrides with Al and the like, refines crystal grains, and exhibits the effect of improving toughness.
  • the N content is set to 0.004% or more.
  • the amount of N is preferably 0.0060% or more, and more preferably 0.010% or more.
  • coarse nitrides such as Al-based nitrides are generated and do not contribute as pinning particles, which causes crystal grain coarsening. From this point of view, the N content is determined to be 0.025% or less.
  • the N amount is preferably 0.020% or less, more preferably 0.017% or less.
  • (sigma) (Xmm) means the value of the residual stress in the position of Xmm from the surface.
  • Test No. Nos. 3, 5, 14 to 18, 22 to 29, and 31 to 34 are steel materials that satisfy the chemical composition defined in the present invention and are obtained under appropriate hot rolling conditions. Therefore, the average equivalent circle diameter of VC is 25 nm or less, and the steel obtained by vacuum carburizing or the steel obtained by vacuum carburizing and shot peening has a surface hardness when tempered at 400 ° C.
  • the surface fatigue strength expressed by 1,000,000 times strength is 3.3 GPa or more. Compared to 1, the surface fatigue strength was 1.20 times or more.
  • Test No. Nos. 26 and 31 to 34 are examples in which shot peening was performed under an appropriate condition after vacuum carburization. Since compressive residual stress could be sufficiently applied, bending fatigue strength expressed by 100,000 times strength was obtained.
  • No. No. 19 is an example in which the heating temperature before hot rolling was low
  • No. 20 is an example in which the heating and holding time before hot rolling was short
  • No. 21 is an example in which the heating and holding time before hot rolling was long. In either case, the average equivalent circle diameter of vanadium carbide was increased, resulting in poor surface fatigue strength.
  • No. 30 is an example in which gas carburization was performed, and a grain boundary oxide layer was formed, resulting in poor surface fatigue strength.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

Le but de la présente invention est d'obtenir : un composant cémenté présentant suffisamment de résistance à la fatigue en surface, de plus un composant cémenté présentant une résistance à la fatigue en surface et une résistance à la fatigue par flexion; ainsi qu'un matériau à base d'acier pour obtenir le composant cémenté. La présente invention est un matériau à base d'acier pour cémentation sous vide, qui contient du C, du Si, du Mn, du S, du P, du Cr, du Mo, du V, de l'Al et du N, le carbure de vanadium présentant un diamètre moyen de cercle équivalent de 25 nm ou moins. La présente invention concerne également un procédé de production du matériau à base d'acier, et concerne plus particulièrement un procédé de fabrication d'un matériau à base d'acier pour cémentation sous vide, une masse d'acier possédant une composition chimique prédéterminée étant maintenue à 1200 °C ou plus pendant 30 à 300 minutes et façonnée en brames, et étant ensuite soumise à un laminage à chaud, tout en réglant la température de chauffage avant laminage à chaud à 950 °C ou plus et en réglant le temps de rétention de chaleur avant laminage à chaud de 30 minutes à 5 heures.
PCT/JP2015/057833 2014-03-24 2015-03-17 Matériau en acier apte à la cémentation sous vide et son procédé de production WO2015146703A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MX2016012061A MX2016012061A (es) 2014-03-24 2015-03-17 Material de acero para carburacion al vacio y metodo para producir el mismo.
KR1020167028788A KR101860658B1 (ko) 2014-03-24 2015-03-17 진공 침탄용 강재 및 그의 제조 방법
CN201580014824.7A CN106103777B (zh) 2014-03-24 2015-03-17 真空渗碳用钢材及其制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014060210A JP6301694B2 (ja) 2014-03-24 2014-03-24 真空浸炭用鋼材及びその製造方法
JP2014-060210 2014-03-24

Publications (1)

Publication Number Publication Date
WO2015146703A1 true WO2015146703A1 (fr) 2015-10-01

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PCT/JP2015/057833 WO2015146703A1 (fr) 2014-03-24 2015-03-17 Matériau en acier apte à la cémentation sous vide et son procédé de production

Country Status (6)

Country Link
JP (1) JP6301694B2 (fr)
KR (1) KR101860658B1 (fr)
CN (2) CN107653420A (fr)
MX (1) MX2016012061A (fr)
TW (1) TWI544088B (fr)
WO (1) WO2015146703A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017179394A (ja) * 2016-03-28 2017-10-05 株式会社神戸製鋼所 肌焼鋼
JP6929535B2 (ja) * 2017-05-25 2021-09-01 株式会社不二製作所 鉄鋼成品の表面処理方法
EP3950993A4 (fr) * 2019-03-29 2022-10-26 Nippon Steel Corporation Pièce carburée et son procédé de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04201128A (ja) * 1990-11-30 1992-07-22 Daido Steel Co Ltd 高面圧部品の製造方法
JP2003193137A (ja) * 2001-12-25 2003-07-09 Nippon Steel Corp 浸炭焼入部材及びその製造方法
JP2006183095A (ja) * 2004-12-27 2006-07-13 Nippon Steel Corp 歯面疲労強度に優れた歯車の製造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005163148A (ja) 2003-12-04 2005-06-23 Sanyo Special Steel Co Ltd 高強度歯車用肌焼鋼
DE102005061946B4 (de) * 2004-12-27 2013-03-21 Nippon Steel Corp. Einsatzgehärteter Stahl mit hervorragender Zahnoberflächendauerfestigkeit, diesen verwendendes Zahnrad, und Verfahren zur Herstellung desselben
JP4853366B2 (ja) 2007-04-13 2012-01-11 住友金属工業株式会社 ショットピーニングを施した鋼製の浸炭部品又は浸炭窒化部品
DE112007003622B4 (de) * 2007-08-17 2020-08-06 Gkn Sinter Metals, Llc. Verfahren zum Erhalten eines Zahnrads mit variierender Einsatzhärtetiefe
KR20120012837A (ko) * 2010-03-10 2012-02-10 신닛뽄세이테쯔 카부시키카이샤 저사이클 굽힘 피로 강도가 우수한 침탄강 부품
WO2012108460A1 (fr) * 2011-02-10 2012-08-16 新日本製鐵株式会社 Acier pour cémentation au carbone, et composant en acier cémenté ainsi que procédé de fabrication de celui-ci
JP5620336B2 (ja) * 2011-05-26 2014-11-05 新日鐵住金株式会社 高疲労強度、高靭性機械構造用鋼部品およびその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04201128A (ja) * 1990-11-30 1992-07-22 Daido Steel Co Ltd 高面圧部品の製造方法
JP2003193137A (ja) * 2001-12-25 2003-07-09 Nippon Steel Corp 浸炭焼入部材及びその製造方法
JP2006183095A (ja) * 2004-12-27 2006-07-13 Nippon Steel Corp 歯面疲労強度に優れた歯車の製造方法

Also Published As

Publication number Publication date
TW201540849A (zh) 2015-11-01
MX2016012061A (es) 2017-01-19
CN107653420A (zh) 2018-02-02
KR101860658B1 (ko) 2018-05-23
KR20160133549A (ko) 2016-11-22
JP6301694B2 (ja) 2018-03-28
CN106103777A (zh) 2016-11-09
JP2015183227A (ja) 2015-10-22
TWI544088B (zh) 2016-08-01
CN106103777B (zh) 2018-07-27

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