DE1696134A1 - Furnace system for treating workpieces in a steam atmosphere - Google Patents

Furnace system for treating workpieces in a steam atmosphere

Info

Publication number
DE1696134A1
DE1696134A1 DE19681696134 DE1696134A DE1696134A1 DE 1696134 A1 DE1696134 A1 DE 1696134A1 DE 19681696134 DE19681696134 DE 19681696134 DE 1696134 A DE1696134 A DE 1696134A DE 1696134 A1 DE1696134 A1 DE 1696134A1
Authority
DE
Germany
Prior art keywords
steam
furnace system
steam atmosphere
treatment
treating workpieces
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
DE19681696134
Other languages
German (de)
Inventor
Helmut Lohse
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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 Degussa GmbH filed Critical Degussa GmbH
Publication of DE1696134A1 publication Critical patent/DE1696134A1/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C8/00Solid 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
    • C23C8/06Solid 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
    • C23C8/08Solid 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
    • C23C8/10Oxidising
    • C23C8/16Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76Adjusting the composition of the atmosphere

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Ofenanlage zur Behandlung von Werkstücken in einer Wasserdampfatmosphäre Bekannt sind Ofenanlagen zur Behandlung von Werkstücken in einer Dampfatmosphäre, wobei eine Eisenoxidechicht, und zwar die chemische Verbindung F304, gebildet wird. Bei der Dampfbehandlung von Eisensinte-rteilen ergibt diese Schicht besonders gute'Gleiteigenschaften. Zusätzlich wird auch eine gleichmäßig blaue Oberfläche und eine gute Beständigkeit gegen Rosten erzielt. Bei der Behandlung von Werkzeugen (Dampfbläuen und Dampfanlassen) wird neben der Rostbeständigkeit und einer ansprechenden blauen Oberfläche auch eine Verlängerung der Betriebszeit bis zum Nachschleifen bzw. bis zur Nachbehandlung erreicht. Im Dampfbchandlungsöf'en lassen sich auch Messingteile sowie Kupfer-und Aluminium-Legierungen in Bezug auf die Oberflächenbeschaffenheit eit mit Vorteil wärmebehandeln. -Bei den bekannten Ofenanlagen wird dem gasdichten Behandlungsraum Naßdampf'durch einen- neben der Anlage aufgestellten Niederdruck-Dampferzeuger zugeführt. In, Einzelfällen wurden selche Ofenanlagen auch schon an ein zentrales Dampferzeugungssystem angeschlossen. Unter bestimmten.Voraussetzungen muß bei .d er vorbeschriebenen Verfahrensweise mit Fleckenbildung auf dem Behandlungsgut bzw.Furnace system for treating workpieces in a steam atmosphere Furnace systems for treating workpieces in a steam atmosphere are known, whereby an iron oxide layer, namely the chemical compound F304, is formed. When steaming sintered iron parts, this layer gives particularly good sliding properties. In addition, it also has a uniform blue surface and good durability scored against rusting. When treating tools (steam blue and steam tempering) is next to the rust resistance and an appealing blue surface as well an extension of the operating time until regrinding or after treatment achieved. Brass parts as well as copper and Aluminum alloys have always been advantageous in terms of surface properties heat treat. -In the known furnace systems, the gas-tight treatment room Naßdampf'by a low-pressure steam generator set up next to the system is supplied. In, individual cases, the same furnace systems have already been connected to a central steam generation system connected. Under certain.conditions, the procedure described above must be followed with stains on the item to be treated or

mit Rost (Fe z03) gerechnet werden, . . hrfindungsgemäß wird vorgeschlagen, den erforderlichen Dampf im I3ehandlun4sraum durch-dosierte Eintropfung von Wasser oder wässrigen Lösungen zu erzeugen. hierdurch entfällt die Dampferzeagungsanlage. Außerdem treten hecken- bzw. Rostbildung bei dieser Betriebswelse nicht mehr auf. Im Gegensatz zu den bekannten Dampfbehandlüngsöfen wird die bei Beginn der Dampf" behandlung im Ofenraum befindliche Luft nicht mehr durch einer Dampfspülung, sondern durch eine Spülung mit Inertgasen beseitigt. Der trfindungsgedanke ist in Abb.=1 an einem als Beispiel ge- Wählten Schachtofen erläutert. Abb. 2 zeigt die Ausführung der in die Dampfbehandlungsöfen einzubauenden-Yerdampfervorrichtung. 1)er gasdicht angeschlossene 13ch.-indlungsraum (1) nach Abb. 1 jrird durch den Ofen @(2) beheizt. Durch den Umwälzer (3) wird die Behandlungsatmosphäre im Behandlungsraum in eine Zwangsbe- wegung gebracht. Die Bewegung der Atmosphäre ist besonders dann erforderlich, wenn Schnellstahlwerkzeuge dampfbehandelt und dabei, gleichzeitig angelassen werden.. Bei dieser Behandlungs- art ist eine große Temperaturgleichmäßigkeit erforderlich. Die Verdampfervorrichtung (4),wird durch eine Dosierpumpe (5 mit der Verdampferflüssigkelt versorgt. Bei Dampfbehandlungs- Ofenanlagen ist eine 11berdruckslcherung (6)-erforderlich. Der Verdampfervorrichtung nach Abb. 2 wird durch das Rohr (7 die dosierte Wassermenge oder wässrige Lösung zugefiihrt. Die Verdampferflüssigkeit gelangt anschließend in die Verdampfungs- kammer (8). Der hier erzeugte Dampf wird dann in den Kammern (9 und 1o) iiberhitzt und tritt durch die Öffnungen (11) in den Reaktionsraum ein. rust (Fe z03) can be expected,. . According to the invention, it is proposed to generate the required steam in the handling space through dosed dropwise addition of water or aqueous solutions. this eliminates the need for a steam generator. In addition, there is no longer any formation of hedge or rust in this plant catfish. In contrast to the known steam treatment ovens, the air in the oven chamber at the start of the steam treatment is no longer removed by steam purging, but by purging with inert gases. The idea of finding is shown in Fig. = 1 using an example Chosen shaft furnace explained. Fig. 2 shows the execution of the Evaporator device to be built into the steam treatment furnaces. 1) the gas-tight connected 13ch. Indentation room (1) according to Fig. 1 jr is heated by the furnace @ (2). Through the circulator (3) is the treatment atmosphere in the treatment room into a forced condition moved. The movement of the atmosphere is special required when high-speed steel tools are steam-treated and at the same time being left on .. With this treatment art requires a high degree of temperature uniformity. The evaporator device (4) is powered by a dosing pump (5 supplied with the evaporator liquid. For steam treatment Overpressure relief (6) is required for furnace systems. The evaporator device according to Fig. 2 is connected through the pipe (7 the metered amount of water or aqueous solution is added. the Evaporation liquid then enters the evaporation chamber (8). The steam generated here is then used in the chambers (9 and 1o) overheats and enters through the openings (11 ) Reaction space.

Claims (3)

1'atentanspriiche 1) Dampfbehandlungs-Ofenanlage mit gasdicht abgeschlossenem Behandlungsraum, dadurch gekennzeichnet, daß die Dampfatmosphäre in einer in den Dampfbehandlungsraum eingebauten Verdampfervorricbtung, durch dosiertes hintropfen von Wasser oder wässrigen Lösungen erzeugbar ist. 1'atent claims 1) Steam treatment furnace system with gas-tight sealed Treatment room, characterized in that the steam atmosphere in a Steam treatment room built-in evaporator equipment, by dosed dripping can be generated by water or aqueous solutions. 2) Ofenanlage nach Anspruch.1,-dadurch gekennzeichnet; daß der der Behandlungsraum durch ein Inertgas spülbar ist. 2) furnace system according to claim.1, -thereby marked; that the treatment room can be flushed by an inert gas. 3) Ofenanlage nach Anspruch 1, dadurch gekennzeichnet, daß der Dampf in der Verdampfervorrchtung iberhitzbar ist. 3) furnace system according to claim 1, characterized in that the steam in the evaporator device can be overheated.
DE19681696134 1968-01-15 1968-01-15 Furnace system for treating workpieces in a steam atmosphere Pending DE1696134A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0055113 1968-01-15

Publications (1)

Publication Number Publication Date
DE1696134A1 true DE1696134A1 (en) 1971-10-28

Family

ID=7056259

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681696134 Pending DE1696134A1 (en) 1968-01-15 1968-01-15 Furnace system for treating workpieces in a steam atmosphere

Country Status (1)

Country Link
DE (1) DE1696134A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0679728A1 (en) * 1994-04-26 1995-11-02 Eiwa Co Ltd Method and apparatus for processing metal material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0679728A1 (en) * 1994-04-26 1995-11-02 Eiwa Co Ltd Method and apparatus for processing metal material

Similar Documents

Publication Publication Date Title
EP0105835B1 (en) Method of producing a hard layer on articles of ti or ti-alloys
EP0133613B1 (en) Method of cooling charges in industrial discontinuously working furnaces, especially steel wire or strip coils in bell-type furnaces
DE3042469C2 (en) Process for two-stage nitriding of iron alloys that may contain chromium
DE1180385B (en) Device for heating objects, especially made of metal such as iron, steel and the like. Like., Using an electrically heated fluidized bed furnace
DE2111183C3 (en)
DE1696134A1 (en) Furnace system for treating workpieces in a steam atmosphere
DE3442250A1 (en) BOILER PIPE AND ITS TREATMENT
DE1060217B (en) Method and device for treating the surface of bodies of a metallic or other nature by means of an electric glow discharge
DE2305000B2 (en) Process for the recrystallization of semi-finished brass products
EP0248431A2 (en) Method of producing outer coating layers on heat and corrosion resistant austenitic steels
DE1207179B (en) Oxide ceramic crucible for vacuum deposition of metals
US2742382A (en) Method of annealing with a silicone oxidation scale prohibitor
DE560554C (en) Salt bath oven
DE954607C (en) Process for decarburizing the surface layers of workpieces made of iron or steel
DE1253992B (en) Process for nitriding steel and cast iron using ionized nitrogen
DE3120509C2 (en) Process for gas nitriding of workpieces made of steel
CH288438A (en) Method for applying metal coatings to elongated work items, as well as device for carrying out the method.
DE19730372C5 (en) Cleaning and de-passivation of surfaces to be nitrided or nitrocarburised with light acids
SU1719461A1 (en) Method of carbonitriding of steel products
DE879554C (en) Process to improve the strength properties of nitrided workpieces
DE679435C (en) Procedure to protect the electrical heating elements against the harmful effects of protective gas
DE2341633A1 (en) Protective coating for metal surfaces during heat-treatment - esp. for selective carburising and nitriding in salt baths
DE740517C (en) Process for the heat treatment of austenitic materials in a tower furnace
EP0076488B1 (en) Process for forming fe2b layers on articles of ferrous alloys
AT222682B (en) Process for nitriding steel objects in places