DE2243301A1 - ATMOSPHERES AND METHODS FOR THE ACCELERATED GENERATION OF A CONNECTION ZONE DURING GAS NITRATION - Google Patents

ATMOSPHERES AND METHODS FOR THE ACCELERATED GENERATION OF A CONNECTION ZONE DURING GAS NITRATION

Info

Publication number
DE2243301A1
DE2243301A1 DE19722243301 DE2243301A DE2243301A1 DE 2243301 A1 DE2243301 A1 DE 2243301A1 DE 19722243301 DE19722243301 DE 19722243301 DE 2243301 A DE2243301 A DE 2243301A DE 2243301 A1 DE2243301 A1 DE 2243301A1
Authority
DE
Germany
Prior art keywords
nitriding
gas
atmospheres
methods
connection zone
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.)
Pending
Application number
DE19722243301
Other languages
German (de)
Inventor
Werner Graef
Werner Dr Ing Schroeter
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.)
Barkas Werke VEB
Original Assignee
Barkas Werke VEB
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 Barkas Werke VEB filed Critical Barkas Werke VEB
Publication of DE2243301A1 publication Critical patent/DE2243301A1/en
Pending 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
    • C23C8/24—Nitriding
    • 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

Landscapes

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

Description

Atmosphäre und Verfahren zur beschleunigten Erzeugung einer Verbindungszone durch Gasnitrieren Atmosphere and accelerated generation method a connection zone by gas nitriding

Die Erfindung betrifft eine Atmosphäre und ein Verfahren zur beschleunigten Erzeugung einer Verbindungszone* bestehend aus Nitriden bzw. Karbonitriden des Grundwerkstoffes und dessen Legierungselement en, mit erhöh« tem Widerstand gegen Verschleiß und Korrosion sowie erhöhter Dauexfestigkeit auf Metallen, insbesondere Eisen werkstoffen, durch Gasnitrieren»The invention relates to an atmosphere and a method for the accelerated creation of a connecting zone * consisting of nitrides or carbonitrides of the base material and its alloying elements, with increased resistance to wear and corrosion and increased durability on metals, in particular iron materials, by gas nitriding »

Das Gasnitrieren wird als Oberflächenbehandlungsverfahren für Eisenwerkatoffe schon sehr lange zur Erhöhung von Verschleiß- und Dauerfestigkeit angewendete Dazu werden speziell legierte Stähle, sog. Nitrierstähle, eingesetzt. Zur Erzeugung von Verbindungszonen durch Nitrieren sind folgende Verfahren bekannt'!Gas nitriding has been used as a surface treatment process for ferrous materials for a very long time for wear and fatigue strength, specially alloyed steels, so-called nitrided steels, are used. used. The following methods are known for producing connection zones by nitriding '!

1. Gasnitrieren1. Gas nitriding

2. Ionitrieren2. Ionitriding

3. Badnitrieren3. Bath nitriding

4. modifiziertes Badnitrieren (iEenifer-Verfahren)4. Modified bath nitriding (iEenifer process)

Die Anwendbarkeit von Gasnitrieren und Ionitrieren ist auf spezielle Stähle mit bestimmten Legierungselement; on beschränkt. Beim Gasnitrieren entstehen auf unlegierten Stählen keine Verbindungszonen mit den entsprechenden Gebrauchseigenschaften» Von Nachteil sind die beim Gasnitrieren erforderlichen langen Behandlungszeiteno Durch einfaches und modifiziertes (Tenifer) Badnitrieren können zwar auf allen Eisenwerkstoffen Verbindungszonen in relativ kurzer Zeit (2 bis 4 Stunden) erzielt werden, jedoch ist das Nitrieren in Salzbädern mit bestimmten technischen und ökonomischen Nachteilen ver~ 309826/0717 The applicability of gas nitriding and ion nitriding is to special steels with certain alloying elements; on limited. Gas nitriding no connection zones occur on non-alloy steels with appropriate performance characteristics "Disadvantages include the necessary gas nitriding long treatment times o By simply modified (Tenifer) bath nitriding can indeed achieved on all ferrous materials bonding zones in a relatively short time (2 to 4 hours) However, the nitriding in salt baths with certain technical and economic disadvantages is ver ~ 309826/0717

BAD ORIGINALBATH ORIGINAL

bunden« Salzbäder sind für die Behandlung von großen Werkstücken und Werketückserien 'ungeeignet· Zu den Nachteilen zählt weiterhin die Giftigkeit der zyanhaltigen Salzo und der damit verbundene Aufwand und die erforderlichen Sicherheitsvorkehrungen beim Behandeln und Eeinigen der Werkstücke, Bäder und Abwäs-" ser<> Beim reinen Badnitrieren wirken sehr viele Stör» faktören auf das Ergebnis der Behandlung ein, was häufig zu sehr unterschiedlichen Qualitäten der Verbindungszonen führtebound «salt baths are great for treating Workpieces and series of workpieces' unsuitable · For the Disadvantages still counts the toxicity of the cyanide salt and the effort involved and the necessary safety precautions when treating and cleaning the workpieces, baths and waste " ser <> In the case of pure bath nitriding, a lot of sturgeon » factor in the outcome of the treatment, which is common to very different qualities of the connection zones led

Zweck der Erfindung ist die Beseitigung der Nachteile der bekannten Verfahren zum Nitrieren von Metallen, insbesondere Eisenwerkstoffen, durch die eine Anwendung in Großserien möglich ist und eine Verkürzung der Behandlungszeiten, eine Verringerung des erforderlichen Aufwandes» eine gleichbleibend gute Qualität und eine Senkung der Kosten erreicht werden.The purpose of the invention is to eliminate the disadvantages the known methods for nitriding metals, in particular ferrous materials, through which an application in large series is possible and a shortening the treatment times, a reduction in the effort required »consistently good quality and a reduction in cost can be achieved.

Der Erfindung liegt die Aufgabe zugrunde, eine Atmosphäre und ein Verfahren zum Gasnitrieren von Metallen, insbesondere von Eisenwerkstoffen, zu entwickeln, die es ermöglichen, teohnisch nutzbare Verbindungszonen und Nitrierschichten mit erhöhtem Verschleiß- und Korrosionswidorstand sowie erhöhter Dauerfestigkeit und Nitrieren in einer Gasatmosphäre in solch kurzen Zeiten, die den Behandlungszeiten beim Badnitrieren gleichkommen, zu erzielen· Es wurde gefunden, daß durch Zugabe von Kohlenmonoxid zum ammoniakalischen Nitriergas beim Gasnitrieren eine Nitrierschicht mit Verbindungszone auf Eisenwerkstoffen in kurzer Zeit entsteht« The invention is based on the object of creating an atmosphere and to develop a method for gas nitriding of metals, especially ferrous materials, which make it possible to create partially usable connection zones and nitrided layers with increased wear and corrosion resistance as well as increased fatigue strength and nitriding in a gas atmosphere in such short times that correspond to the treatment times for bath nitriding equal to achieve · It has been found that by adding carbon monoxide to the ammoniacal nitriding gas during gas nitriding, a nitriding layer with a connection zone on ferrous materials is created in a short time «

Erfindungsgemäß kann dem Nitriergas außer Kohlenmonoxid noch ein neutrales Trägergas, z· B, Stickstoff, Argon u« a„ zugesetzt werden·According to the invention, the nitriding gas can be used in addition to carbon monoxide a neutral carrier gas, e.g. nitrogen, argon, etc. can be added.

Mit Behandlungszeiten bis zu 4 Stunden werden Verbindungszonen erzielt, die den erreichbaren Schichten beim modifizierten Badnitrieren (Tenifer) entsprechen· Die Erfindung ermöglicht es,'in den für die Gasnitrierung üblicherweise verwendeten Einrichtungen und Anlagen Metalle, insbesondere Eisenwerkstoffe in kurzenConnection zones are created with treatment times of up to 4 hours achieved that correspond to the layers that can be achieved with modified bath nitriding (Tenifer) The invention makes it possible 'in the gas nitriding commonly used facilities and equipment metals, especially ferrous materials in short

309826/0717 bad original309826/0717 bad original

Zeiten zu nitrieren und eine Verbindungszone zu erzeugen«» " ■ . · Sin weiterer Vorteil der Erfindung ist, jda3 Werkstücke beliebiger Form und Abmessung und in großen Serien be*~ handelt werden können^Nitriding times and creating a connecting zone «» "■. · Another advantage of the invention is jda3 workpieces of any shape and size and be * ~ in large series can be traded ^

Bas erfindungsgemäße Verfahren kann beispielsweise so ausgeführt werden, daß dem ammoniakalischen Mtriergas eine bestimmte Menge von Kohlenmonoxid, z· B* 1o % zu« gemischt wirde ·Bas inventive method can be performed, for example, that the ammoniacal Mtriergas a certain amount of carbon monoxide, is mixed z * B * 1o% to "e ·

BAD ORKaIMALBAD ORKaIMAL

Claims (1)

— Zj. _ '- Zj. _ ' Patentanspruchs.Pa t entan spruc hs. Atmosphäre und Verfahren zur beschleunigten Er*· zeugung einer Verbindungszone durch Gasnitrieren von Metallen, insbesondere Eisenwerkstoffen» zwecks Erzeugung einer gegen Verschleiß, IiEf ressen, Ermüdung und Korrosion beständigen. Oberflächenschicht, dadurch gekennzeichnet, daß den ammo niakalis ehe η Nitriergas eine bestimmte Menge von Kohlenmonoxid zugesetzt wird.Atmosphere and method for the accelerated generation of a connecting zone by gas nitriding of metals, especially ferrous materials » for the purpose of generating an anti-wear, IiEf ressen, Resistant to fatigue and corrosion. Surface layer, characterized in that the ammo niakalis before η nitrating gas a certain amount of carbon monoxide is added. Atmosphäre und Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß dem Nitriergas außer Kohlenmonoxid noch ein neutrales fragergfts, z, B.« Stickstoff, Argon u» l.j, zugesetztAtmosphere and method according to claim 1, characterized in that the nitriding gas other than carbon monoxide or a neutral fragergfts, Eg "nitrogen, argon, u» lj added BAD ORIGINALBATH ORIGINAL
DE19722243301 1971-12-10 1972-09-02 ATMOSPHERES AND METHODS FOR THE ACCELERATED GENERATION OF A CONNECTION ZONE DURING GAS NITRATION Pending DE2243301A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD15948471 1971-12-10

Publications (1)

Publication Number Publication Date
DE2243301A1 true DE2243301A1 (en) 1973-06-28

Family

ID=5484758

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722243301 Pending DE2243301A1 (en) 1971-12-10 1972-09-02 ATMOSPHERES AND METHODS FOR THE ACCELERATED GENERATION OF A CONNECTION ZONE DURING GAS NITRATION

Country Status (3)

Country Link
CH (1) CH580683A5 (en)
DE (1) DE2243301A1 (en)
FR (1) FR2162654A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930444A1 (en) * 1979-07-26 1981-01-29 Honda Motor Co Ltd Gas phase soft nitriding metal workpieces - using gas mixt. contg. relatively low amt. of ammonia

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD47847A (en) *
US3336167A (en) * 1963-06-26 1967-08-15 Kokusai Electric Co Ltd Process for treatment of surfaces of iron and steel
FR2063287A5 (en) * 1969-09-10 1971-07-09 Peugeot & Renault Gaseous nitriding of steels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930444A1 (en) * 1979-07-26 1981-01-29 Honda Motor Co Ltd Gas phase soft nitriding metal workpieces - using gas mixt. contg. relatively low amt. of ammonia

Also Published As

Publication number Publication date
FR2162654A1 (en) 1973-07-20
FR2162654B1 (en) 1976-08-20
CH580683A5 (en) 1976-10-15

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