CA2312034A1 - Nitriding steel, method for obtaining same and parts formed with said steel - Google Patents

Nitriding steel, method for obtaining same and parts formed with said steel Download PDF

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Publication number
CA2312034A1
CA2312034A1 CA002312034A CA2312034A CA2312034A1 CA 2312034 A1 CA2312034 A1 CA 2312034A1 CA 002312034 A CA002312034 A CA 002312034A CA 2312034 A CA2312034 A CA 2312034A CA 2312034 A1 CA2312034 A1 CA 2312034A1
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CA
Canada
Prior art keywords
composition
weight
steel
manufacturing
nitriding
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Legal status (The legal status 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 status listed.)
Granted
Application number
CA002312034A
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French (fr)
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CA2312034C (en
Inventor
Philippe Dubois
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Aubert and Duval SA
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Individual
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Publication of CA2312034A1 publication Critical patent/CA2312034A1/en
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Publication of CA2312034C publication Critical patent/CA2312034C/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C22C38/06—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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)
  • Ceramic Products (AREA)
  • Saccharide Compounds (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Catalysts (AREA)

Abstract

The invention concerns a steel composition comprising, expressed in wt.%: 0.2 to 0.4 % of C; 0.8 to 2 % of Cr; 0.6 to 2 % of Mo; 0.05 to 0.4 % of Al; and as the case may be, not more than 0.5 % of Si; not more than 1.5 % of Mn; not more than 1.5 % Ni; not more than 0.5 % of V; the rest consisting of iron and residual impurities; said composition Cr, Mo, V and Al contents expressed in wt.% satisfies the following relationship: 4 </= 3Cr + Mo + V + 2Al </= 8. The invention also concerns a method for making treated and nitrided parts, made of said compositions.

Claims (12)

1. Composition d'acier de nitruration comprenant, exprimés en % en poids, 0,2 à 0,4% de C, 0,8 à 2% de Cr, 0,6 à 2% de Mo, 0,05 à 0,4% de Al, et, le cas échéant, au plus 0,5% de Si, au plus 1,5% de Mn, au plus 1,5% de Ni, au plus 0,5% de V, le complément étant constitué de fer et d'impuretés résiduelles, les teneurs de cette composition en Cr, Mo, V et Al, exprimées en % en poids, satisfaisant la relation suivante:
4 ~ 3Cr+Mo+V+2Al ~ 8. 1. Composition of nitriding steel comprising, expressed in% by weight, 0.2 to 0.4% of C, 0.8 to 2% of Cr, 0.6 to 2% of Mo, 0.05 to 0.4% Al, and optionally, at most 0.5% of Si, at most 1.5% of Mn, at most 1.5% of Ni, at most 0.5% of V, the remainder consisting of iron and residual impurities, the contents of this composition in Cr, Mo, V and Al, expressed in% in weight, satisfying the following relation:
4 ~ 3Cr + Mo + V + 2Al ~ 8. 2. Composition d'acier de nitruration selon la revendication 1, comprenant, exprimés en % en poids, 0,25 à 0,37% de C, 1,1 à 1,8% de Cr, 0,8 à 1,5% de Mo, 0,1 à 0,3% de Al, 0,2 à 1,1% de Mn, 0,5 à 1,3% de Ni, 0,1 à 0,4% de V, et, le cas échéant, au plus 0,35% de Si, le complément étant constitué de fer et d'impuretés résiduelles, les teneurs de cette composition en Cr, Mo, V et Al, exprimées en % en poids, satisfaisant la relation suivante:
4 ~ 3Cr+Mo+V+2Al ~ 8. 2. A nitriding steel composition according to claim 1, comprising, expressed in% by weight, 0.25 to 0.37% of C, 1.1 to 1.8% Cr, 0.8 to 1.5% of Mo, 0.1 to 0.3% Al, 0.2 to 1.1% of Mn, 0.5 to 1.3% of Ni, 0.1 to 0.4% of V, and optionally, at most 0.35% of Si, the remainder consisting of iron and residual impurities, the contents of this composition in Cr, Mo, V and Al, expressed in% in weight, satisfying the following relation:
4 ~ 3Cr + Mo + V + 2Al ~ 8. 3. Composition d'acier de nitruration selon l'une des revendications 1 ou 2, comprenant en outre au plus 0,015% en poids de S et 0,020% en poids de P. 3. Composition of nitriding steel according to one of claims 1 or 2, further comprising at most 0.015% by weight of S and 0.020% by weight weight of P. 4. Composition d'acier de nitruration selon l'une quelconque des revendications 1 à 3, contenant en outre au plus 0,1% en poids de chaque élément Ca, Ce, Nb, Ti, Zr. 4. Composition of nitriding steel according to any one of claims 1 to 3, further containing at most 0.1% by weight of each element Ca, Ce, Nb, Ti, Zr. 5. Procédé de fabrication de pièces traitées et nitrurées, comprenant les opérations suivantes:
a - constitution d'une charge destinée à obtenir une composition chimique selon l'une quelconque des revendications 1 à 4, b - élaboration de ladite charge dans un four à arc, c - réchauffage et transformation à chaud du lingot, d - traitement thermique d'homogénéisation de la structure et d'affinement du grain, e - traitement thermique d'emploi, et f - nitruration. 5. Method for manufacturing treated and nitrided parts, comprising following operations:
a - constitution of a charge intended to obtain a composition chemical according to any one of claims 1 to 4, b - preparation of said charge in an arc furnace, c - heating and hot transformation of the ingot, d - heat treatment to homogenize the structure and grain refinement, e - heat treatment for use, and f - nitriding. 6. Procédé de fabrication selon la revendication 5, dans lequel l'élaboration dans un four à arc (étape b) est suivie d'une refusion par électrode consommable. 6. The manufacturing method according to claim 5, wherein elaboration in an arc furnace (step b) is followed by remelting by consumable electrode. 7. Procédé de fabrication selon la revendication 6, dans lequel l'élaboration dans un four à arc (étape b) est effectuée sous pression réduite. 7. The manufacturing method according to claim 6, wherein elaboration in an arc furnace (step b) is carried out under pressure scaled down. 8. Procédé de fabrication selon l'une quelconque des revendications 5 à
7, dans lequel l'étape d comprend une normalisation à une température supérieure à celle du point critique AC3, un refroidissement à l'air et un revenu d'adoucissement à une température inférieure à celle du point critique AC1. 8. The manufacturing method according to any one of claims 5 to 7, in which step d comprises normalization at a temperature greater than that of the critical point AC3, air cooling and softening income at a temperature below that of the point critical AC1. 9. Procédé de fabrication selon l'une quelconque des revendications 5 à 8 dans lequel l'étape e comprend une trempe à partir d'une température d'austénitisation dans la gamme de 900-1000°C, suivie d'un revenu à
une température de 550-750°C. 9. Manufacturing method according to any one of claims 5 to 8 wherein step e comprises quenching from a temperature austenitization in the range of 900-1000 ° C, followed by tempering a temperature of 550-750 ° C. 10. Procédé de fabrication selon la revendication 9 dans lequel la température du revenu est supérieure d'au moins 30°C à la température de nitruration. 10. The manufacturing method according to claim 9 wherein the tempering temperature is at least 30 ° C higher than the nitriding temperature. 11. Pièces, barres, tôles, ébauches forgées ou matricées, tubes et fils en acier ayant une composition selon l'une quelconque des revendications 1 à 4. 11. Parts, bars, sheets, forged or stamped blanks, tubes and wires in steel having a composition according to any one of claims 1 to 4. 12. Pièces, barres, tôles, ébauches forgées ou matricées, tubes et fils en acier selon la revendication 11, caractérisés en ce qu'ils sont obtenus par un procédé selon l'une quelconque des revendications 5 à 10. 12. Parts, bars, sheets, forged or stamped blanks, tubes and wires in steel according to claim 11, characterized in that they are obtained by a method according to any one of claims 5 to 10.
CA2312034A 1998-09-30 1999-09-28 Nitriding steel, method for obtaining same and parts formed with said steel Expired - Lifetime CA2312034C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR98/12209 1998-09-30
FR9812209A FR2783840B1 (en) 1998-09-30 1998-09-30 STEEL ALLOWING HIGH NITRURATION KINETICS, PROCESS FOR OBTAINING SAME AND PARTS FORMED THEREFROM
PCT/FR1999/002297 WO2000018975A1 (en) 1998-09-30 1999-09-28 Nitriding steel, method for obtaining same and parts formed with said steel

Publications (2)

Publication Number Publication Date
CA2312034A1 true CA2312034A1 (en) 2000-04-06
CA2312034C CA2312034C (en) 2010-06-01

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CA2312034A Expired - Lifetime CA2312034C (en) 1998-09-30 1999-09-28 Nitriding steel, method for obtaining same and parts formed with said steel

Country Status (7)

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EP (1) EP1044287B1 (en)
AT (1) ATE531832T1 (en)
CA (1) CA2312034C (en)
DK (1) DK1044287T3 (en)
ES (1) ES2374261T3 (en)
FR (1) FR2783840B1 (en)
WO (1) WO2000018975A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4142853B2 (en) * 2001-03-22 2008-09-03 新日本製鐵株式会社 High strength bolt with excellent delayed fracture resistance
FR2884879B1 (en) * 2005-04-22 2007-08-03 Stephanois Rech Mec TORQUE OF GUIDE ARMS WHOSE ONE IS OF PARTICULAR STEEL LEADING TO IMPROVED PERFORMANCE.
DE102006025008B4 (en) 2006-05-30 2022-09-15 Schaeffler Technologies AG & Co. KG Process for hardening running surfaces of roller bearing components
DE102011088234A1 (en) * 2011-12-12 2013-06-13 Aktiebolaget Skf component

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0756043B2 (en) * 1988-09-27 1995-06-14 マツダ株式会社 Steel member manufacturing method
JPH0445244A (en) * 1990-06-09 1992-02-14 Aichi Steel Works Ltd Rapid nitriding steel excellent in fatigue strength
JPH073392A (en) * 1993-06-18 1995-01-06 Nkk Corp Steel for nitriding
JP2885061B2 (en) * 1994-04-20 1999-04-19 日本鋼管株式会社 Method for producing nitrided steel member excellent in fatigue characteristics
JPH0849058A (en) * 1994-08-03 1996-02-20 Nkk Corp Production of wear resistant nitrided steel member small in heat treating strain
JPH08176732A (en) * 1994-12-27 1996-07-09 Nkk Corp Steel for nitriding having excellent machinability
JP3069256B2 (en) * 1995-01-12 2000-07-24 住友金属工業株式会社 Nitriding steel with excellent toughness
DE69617002T4 (en) * 1995-05-15 2003-03-20 Sumitomo Metal Industries, Ltd. METHOD FOR PRODUCING HIGH-STRENGTH SEAMLESS STEEL TUBES WITH EXCELLENT SULFUR-INDUCED TENSION crack cracking resistance

Also Published As

Publication number Publication date
ES2374261T3 (en) 2012-02-15
ATE531832T1 (en) 2011-11-15
EP1044287B1 (en) 2011-11-02
FR2783840B1 (en) 2000-11-10
DK1044287T3 (en) 2011-12-12
WO2000018975A1 (en) 2000-04-06
CA2312034C (en) 2010-06-01
EP1044287A1 (en) 2000-10-18
FR2783840A1 (en) 2000-03-31

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