FR2442281A1 - Procede pour cementer les aciers - Google Patents

Procede pour cementer les aciers

Info

Publication number
FR2442281A1
FR2442281A1 FR7833493A FR7833493A FR2442281A1 FR 2442281 A1 FR2442281 A1 FR 2442281A1 FR 7833493 A FR7833493 A FR 7833493A FR 7833493 A FR7833493 A FR 7833493A FR 2442281 A1 FR2442281 A1 FR 2442281A1
Authority
FR
France
Prior art keywords
cementation
envelope
steel
hypereutectoid
low alloy
Prior art date
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
FR7833493A
Other languages
English (en)
Other versions
FR2442281B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to FR7833493A priority Critical patent/FR2442281A1/fr
Publication of FR2442281A1 publication Critical patent/FR2442281A1/fr
Application granted granted Critical
Publication of FR2442281B1 publication Critical patent/FR2442281B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising

Landscapes

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

Abstract

Procédé perfectionné pour cémenter des aciers peu alliés dont la teneur en carbone ne dépasse pas environ 0,5 %. On soumet l'acier à une cémentation préalable dans une atmosphère à potentiel de carbone inférieur à Acm, formant ainsi une couche de cémentation à composition hypereutectoïde, on convertit l'acier en bainite, perlite ou martensite par refroidissement et on le soumet à une nouvelle cémentation en le réchauffant à une vitesse inférieure à 20 degrés C/mn dans une région comprise entre la température Ac1 et une température de 750 à 950 degrés C avec un potentiel de carbone supérieur à Acm dans l'atmosphère de cémentation lorsque la température est supérieure à Ac1 . Le procédé selon l'invention permet pour la première fois de former des carbures sphéroïdaux ou sphériques dans des aciers alliés à moins de 2,4 % de chrome.
FR7833493A 1978-11-27 1978-11-27 Procede pour cementer les aciers Granted FR2442281A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7833493A FR2442281A1 (fr) 1978-11-27 1978-11-27 Procede pour cementer les aciers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7833493A FR2442281A1 (fr) 1978-11-27 1978-11-27 Procede pour cementer les aciers

Publications (2)

Publication Number Publication Date
FR2442281A1 true FR2442281A1 (fr) 1980-06-20
FR2442281B1 FR2442281B1 (fr) 1982-07-30

Family

ID=9215419

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7833493A Granted FR2442281A1 (fr) 1978-11-27 1978-11-27 Procede pour cementer les aciers

Country Status (1)

Country Link
FR (1) FR2442281A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096602A1 (fr) * 1982-05-28 1983-12-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé de traitement thermique de pièces métalliques par carburation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CA1979 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096602A1 (fr) * 1982-05-28 1983-12-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé de traitement thermique de pièces métalliques par carburation

Also Published As

Publication number Publication date
FR2442281B1 (fr) 1982-07-30

Similar Documents

Publication Publication Date Title
GB1412637A (en) Method for producing ultra fine-grained microstructure in ferrous alloys
ES457857A1 (es) Procedimiento para reforzar un acero al carbono.
EP0343008A3 (en) Heat treatment of corrosion resistant steels
FR2442281A1 (fr) Procede pour cementer les aciers
JPS5569252A (en) Carburizing method for steel
GB1439071A (en) Thermal treatment of steel
ES8207226A1 (es) Procedimiento para la produccion de chapa de acero.
JPS5816033A (ja) 線材の熱処理方法
JPS5794516A (en) Method for heat treatment on low-carbon boron steel
SU1159957A1 (ru) Способ термомеханической обработки стали
Lili The Strengthening and Toughening of Cast Iron
Schmidtmann et al. Influence of Various Forming Treatments of the Metastable Austenite on the Transformation Behaviour of Steels With High Carbon Content in Bainite and Martensite
Zavyalov et al. The Conditions and Mechanism of Structure-Free Martensite Formation
DE3276438D1 (en) Process and apparatus for heat treating sections of ferrous workpieces
JPS54103732A (en) Heat treatment of extremely low carbon tough steel
Kholin et al. Electrothermal Treatment of High-Alloy Punch Steels
GB1325198A (en) Process of heat treating nickelbearing steel and steel stock produced thereby
Petri et al. Alloy Influence on the Transformation and Precipitation Processes During Cooling of Creep Resistant Tubular Steel After Austenitizing.(Extended Abstract)
Zechmeister et al. Possibilities and Limits of Use of Lasers in Tool Construction
Kim et al. A Study on the Transformation Behaviors of Austenite and Bainite in Ductile Cast Iron
Timofeev et al. Features of Molybdenum Saturation of Malleable Iron
Kulmburg Contribution to the Heat Treatment of High-Speed Steels in Vacuum Furnaces
Yakovlev Structural Nomogram for High-Strength Iron During Surface Hardening With Induction Heating
Yakovlev Kinetic Austenitization Diagrams for High-Strength Cast Iron
Trusova Natural grains and regime of carburizing and subsequent heat treatment of steel 20Kh2N4A

Legal Events

Date Code Title Description
ST Notification of lapse