DE2435132A1 - Heat-treatment of metal parts - where rapid cooling is achieved using a gas-stream contg. copper powder - Google Patents
Heat-treatment of metal parts - where rapid cooling is achieved using a gas-stream contg. copper powderInfo
- Publication number
- DE2435132A1 DE2435132A1 DE2435132A DE2435132A DE2435132A1 DE 2435132 A1 DE2435132 A1 DE 2435132A1 DE 2435132 A DE2435132 A DE 2435132A DE 2435132 A DE2435132 A DE 2435132A DE 2435132 A1 DE2435132 A1 DE 2435132A1
- Authority
- DE
- Germany
- Prior art keywords
- workpieces
- heat
- gas
- copper powder
- treatment
- 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
Links
Classifications
-
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
-
- 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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Verfahren zur Wärmebehandlung erwärmtcr bzw. erhitzter lferkstücke durch Wärmeentzug unter Verwendung eines gasförmigen Kühlmediums Die Erfindung bezieht sich auf ein Verfahren zur trockenen Wärmebehandlung erwärmter bzw. erhitzter metallischer Werkstücke durch Kühlung unter Verwendung eines gasförmigen Mediums, das mittels einer Duschvorrichtung unter Druck dem Werkstück im Oberflächenkontakt zwecks Wärmeabführung strömend zugeführt ist. Process for the heat treatment of heated or heated piglets by heat extraction using a gaseous cooling medium The invention relates refers to a process for the dry heat treatment of heated or heated metallic Workpieces by cooling using a gaseous medium, which by means of a shower device under pressure the workpiece in surface contact for the purpose of heat dissipation is supplied flowing.
Beim Abschrecken induktiv oberflächenerhitzter metallischer Werkstücke, die gehärtet werden sollen, ist es bekannt, flüssige oder gasförmige Medien zur Wärmeabführung zu benutzen.When quenching inductively surface-heated metallic workpieces, which are to be hardened, it is known to use liquid or gaseous media To use heat dissipation.
Auch Gemische in Form fein verteilter Wassertropfen in Luft werden benutzt, wenn größere Wärmemengen in kürzerer Zeit abzuführen sind. Soll trocken und schnell gekühlt werden, ist es bekannt, die Luftmengen ausreichend groß zu wählen und diese der Werkstückoberfläche über Dusch- bzw. Sprühvorrichtungen unter Druck zuzuführen. Der dabei entstehende Lärm ist beträchtlich.Mixtures in the form of finely divided water droplets in air can also be used used when larger amounts of heat are to be dissipated in a shorter time. Should be dry and be cooled quickly, it is known to choose the air quantities sufficiently large and these on the workpiece surface via shower or spray devices under pressure to feed. The resulting noise is considerable.
Die Erfindung befaßt sich mit der Aufgabe der Verbesserung des bekannten Verfahrens der eingangs näher bezeichneten Art durch Verminderung der der Werkstückoberfläche gegebenenfalls auf engstem Raum zur schnellen lWärmeabführung zuzuführenden Luftmengen unter Erhaltung des Wärmetransports bzw. Verbesserung dieses Transports.The invention is concerned with the object of improving the known Method of the type specified in the introduction by reducing the surface of the workpiece possibly in the smallest of spaces for quick heat dissipation to be fed Amounts of air while maintaining heat transport or improving this transport.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren dieser Art dadurch gelöst, daß dem gasförmigen Kühlmedium vor dem Kontakt mit der Werkstückoberfläche in feinkörniger Form ein gut wärmeleitendes festes Material, insbesondere ein Kupferpulver, zugemischt wird.This object is achieved according to the invention by a method of this type solved in that the gaseous cooling medium before contact with the workpiece surface in fine-grained form a solid material with good thermal conductivity, especially a copper powder, is admixed.
Dabei läßt sich die zur notwendigen Wärmeabführung vom Werkstück erforderliche Gasmenge pro Zeiteinheit erheblich reduzieren, und es kann auch die Geräuschbildung in erträglichen Grenzen gehalten werden. Dabei ist es möglich, große Wärmemengen in kurzer Zeit von der Oberfläche der Werkstücke abzuführen.The required heat dissipation from the workpiece can thereby be achieved Significantly reduce the amount of gas per unit of time, and it can also reduce noise be kept within tolerable limits. It is possible to use large amounts of heat removed from the surface of the workpieces in a short time.
Das erfindungsgemäße Verfahren findet bevorzugt beim Abschrecken induktiv erhitzter und durch Abschrecken zu härtender Werkstücke, wie Kurbelwellen, Radachsen, Nockenwellen und dergleichen, Anwendung. Es ist jedoch auch in anderen Wärmebehandlungsverfahren beliebiger Art, mit deren Hilfe ein erwärmter fester Körper zum Beispiel zur Steuerung von Materialeigenschaften (Dehnung, Festigkeit u.a.) mit vorgebbarer Geschwindigkeit insbesondere innerhalb kurzer Zeitspannen gesteuert oder geregelt abgekühlt werden soll, anwendbar.The method according to the invention is preferably inductive during quenching Heated workpieces to be hardened by quenching, such as crankshafts, wheel axles, Camshafts and the like, application. However, it is also used in other heat treatment processes of any kind, with the help of which a heated solid body can be used, for example, for control of material properties (elongation, strength, etc.) at a speed that can be specified in particular are cooled in a controlled or regulated manner within short periods of time should, applicable.
Das Mischungsverhältnis Gas : fester Körper, das bei der Bildung des Kühlmediums einzuhalten ist, kann durch Steuerung oder Regelung des Mischungsverhältnisses den jeweiligen Notwendigkeiten der Wärmeabführung angepaßt werden.The mixture ratio gas: solid body, which is used in the formation of the Cooling medium must be complied with by controlling or regulating the mixing ratio be adapted to the respective needs of heat dissipation.
Der feste Körper wird dem Gas dabei bevorzugt in fein verteilter Pulverform zugeführt. In Sonderfällen ist es möglich, den Feststoffanteil des Gemisches auf einen hohen Betrag zu steigern, um so sehr großc Wärmemengen schnell innerhalb kurzer Zeit abführen zu können.The solid body is preferably given to the gas in finely divided powder form fed. In special cases it is possible to increase the solids content of the mixture a high one To increase the amount so as to increase the amount of heat quickly to be able to discharge within a short time.
Der dem Kühlgas beigemischte Feststoffanteil wird in Vcrfahren, die von der Erfindung Gebrauch machen, zweckmäßig in Strömungsrichtung des Gemischs hinter dem Werkstück einem Wärmeaustauscher zur Abkühlung zugeführt und nach -seiner Abkühlung erneut dem Kühlgasstrom zugemischt, so daß im Fall der Verwendung von Luft als Kühlgas mindestens für den Feststoffanteil ein Kühlmittelkreislauf entsteht.The solids content admixed with the cooling gas is carried out in processes which make use of the invention, expediently in the direction of flow of the mixture behind the workpiece is fed to a heat exchanger for cooling and after -be Cooling is again mixed into the cooling gas stream, so that in the case of the use of Air as a cooling gas creates a coolant circuit for at least the solids content.
Als dem verbesserten Wärmetransport dienende Feststoffe findet bevorzugt pulverisiertes Kupfer Anwendung. Die Verwendung harter und schmirgelnder Stoffe, die gegebenenfalls unter Beachtung des Werkstoffes, der zu kühlen ist, geeignet auch hinsichtlich ihres Schmelzpunktes ausgewählt werden müssen, wird vermieden.Solids serving for improved heat transport are preferred powdered copper application. The use of hard and abrasive materials, which may be suitable, taking into account the material to be cooled also have to be selected with regard to their melting point is avoided.
o Zeichnung 2 Ansprücheo Drawing 2 claims
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2435132A DE2435132A1 (en) | 1974-07-22 | 1974-07-22 | Heat-treatment of metal parts - where rapid cooling is achieved using a gas-stream contg. copper powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2435132A DE2435132A1 (en) | 1974-07-22 | 1974-07-22 | Heat-treatment of metal parts - where rapid cooling is achieved using a gas-stream contg. copper powder |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2435132A1 true DE2435132A1 (en) | 1976-02-12 |
Family
ID=5921168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2435132A Pending DE2435132A1 (en) | 1974-07-22 | 1974-07-22 | Heat-treatment of metal parts - where rapid cooling is achieved using a gas-stream contg. copper powder |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2435132A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2447968A1 (en) * | 1979-01-30 | 1980-08-29 | Celes Sa | Surface hardening of high carbon steels - which are induction heated and then quenched in fluidised bed or stream of particles, which may be heated for isothermal quenching |
FR2816323A1 (en) * | 2000-11-03 | 2002-05-10 | Renault | Surface hardening of a metal, especially steel, component involves quenching in a cooling fluid, followed by cooling and shot-peening using shot contained in the same cooling fluid |
-
1974
- 1974-07-22 DE DE2435132A patent/DE2435132A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2447968A1 (en) * | 1979-01-30 | 1980-08-29 | Celes Sa | Surface hardening of high carbon steels - which are induction heated and then quenched in fluidised bed or stream of particles, which may be heated for isothermal quenching |
FR2816323A1 (en) * | 2000-11-03 | 2002-05-10 | Renault | Surface hardening of a metal, especially steel, component involves quenching in a cooling fluid, followed by cooling and shot-peening using shot contained in the same cooling fluid |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OHJ | Non-payment of the annual fee |