EP0616646B1 - Procede de traitement thermique de produits metalliques - Google Patents

Procede de traitement thermique de produits metalliques Download PDF

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Publication number
EP0616646B1
EP0616646B1 EP93922928A EP93922928A EP0616646B1 EP 0616646 B1 EP0616646 B1 EP 0616646B1 EP 93922928 A EP93922928 A EP 93922928A EP 93922928 A EP93922928 A EP 93922928A EP 0616646 B1 EP0616646 B1 EP 0616646B1
Authority
EP
European Patent Office
Prior art keywords
steel parts
cooling
air
nozzle
roller
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.)
Expired - Lifetime
Application number
EP93922928A
Other languages
German (de)
English (en)
Other versions
EP0616646A1 (fr
Inventor
Hans-Georg Bittner
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.)
WAERMETECHNIK HEIMSOTH GMBH & CO. KG
Original Assignee
Heimsoth Verwaltungen & Co KG Beteiligungsgesellschaft GmbH
Heimsoth Verwaltungen GmbH and Co KG
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 Heimsoth Verwaltungen & Co KG Beteiligungsgesellschaft GmbH, Heimsoth Verwaltungen GmbH and Co KG filed Critical Heimsoth Verwaltungen & Co KG Beteiligungsgesellschaft GmbH
Publication of EP0616646A1 publication Critical patent/EP0616646A1/fr
Application granted granted Critical
Publication of EP0616646B1 publication Critical patent/EP0616646B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof

Definitions

  • the invention relates to a method for hardening relatively thin, quickly cooled steel parts in one Roller furnace, the steel parts after a heating phase in the so-called high temperature range above approx. 800-1250 ° C lying directly on the ceramic rollers of the roller oven to be brought.
  • Nozzles are arranged above and below a roller conveyor for cooling extruded profiles.
  • the invention addresses the problem of hardening steel parts to allow so that the parts themselves do not warp and only marginal edge or Edge decarburization phenomena and edge oxidation or Marginal scale formation phenomena occur.
  • Such a temperature distribution can only be achieved with a roller oven.
  • the burners in the high temperature range, the Austenitization area operated without excess air.
  • the burners So set that in fact a protective gas can be dispensed with This is because slightly scale the steel parts on the surface, and with a layer thickness in the range of approx. 0.01 - 0.03 mm.
  • This edge scaling has no influence on the Product quality, on the contrary, is caused by the scaling prevents the steel parts from carburizing or decarburizing, so that a uniform structure is achieved after the heat treatment and only an edge decarburization of approx. 0.01 - 0.03 mm occurs.
  • This slight decarburization or scaling becomes frequent approved, as a rule in downstream Work steps a surface processing anyway is carried out.
  • the estate is a scale-free, black Surface has, so that no additional surface finishing is more needed.
  • an exact separation of the atmosphere can be realized, for example, by a lock.
  • the cooling operated continuously or pulsating, that means that the cooling only start when a Workpiece has reached the cooling point.
  • the nozzle field is designed according to two points of view. Once to a very high one To achieve heat transfer coefficient.
  • the nozzle field is operated with different forms be, for example from a slight excess pressure of 1 bar up to 20 bar overpressure.
  • the nozzle field can consist of nozzles and the other from a plate, into the holes and slots are incorporated, be trained.
  • the nozzle diameter as well as the division ratio of the nozzles is according to corresponding Material requirements of the goods to be cooled selected.
  • the Nozzle distance between the workpiece and nozzle can be varied, to get intense cooling.
  • the distances of the nozzles of the two fields should be as small as possible and of the same size.
  • the rolls should have small diameters.
  • the heat released during the cooling process during hardening can take the form of preheated air in the order of 100-400 ° C den Burners are fed to the heating zone. So you get one Heat recovery and lower energy consumption.
  • the nozzle field can be designed so that the outflow of the Air to one side or to all four sides takes place or only takes place on two sides or again is suctioned off.
  • the nozzle diameter can range from 1.0-4.0 mm lie.
  • the nozzles can be with or without a nozzle neck be formed.
  • the length of the nozzle neck can range from 0-50 mm be variable.
  • the temperature of the air coming out of the nozzles emerges, can be between room temperature and 150 ° C.
  • the material (the good) can be used in a few Cooled down to temperatures between 40 and 100 ° C for seconds become.
  • roller speeds in the furnace in the heating zone I to III and in the refrigerator section Zone IV can be different.
  • a roller furnace is shown schematically, wherein the roller conveyor through the cross-sectional representation of the rollers is recognizable.
  • the inlet is on the left and the one on the right Spout.
  • the furnace consists of three spatially separated Levels I, II and III.
  • Zone I VWZI
  • VWZI Zone I
  • the burners are above and below the Roller conveyor shown schematically. Are in Zone II (HZ) more burners than shown in Zone II (VWZ II) to access this Way to express that it is the zone II is the high temperature range. The good must be as possible quickly from zone II to zone III (rapid cooling zone kZ) to be brought.
  • HZ Zone II
  • VWZ II Zone II
  • the good must be as possible quickly from zone II to zone III (rapid cooling zone kZ) to be brought.
  • zone III there is a suction the heated cooling air provided to preheat the Combustion air can serve.
  • the heating part is from The refrigerator compartment is separated by an S lock.
  • zone III the goods are quickly seen using nozzle fields chilled.
  • Figure 2 shows a side view of an embodiment of the Cooling zone with above and below the roll Nozzles.
  • Figure 3 shows a view in which the spatial assignment of the Detect nozzles of an upper and a lower nozzle field are.
  • U and O are the individual nozzles of the lower and the called upper nozzle field. The best results are at small distances between the nozzles and the good achieved.
  • Figure 4 shows a side view of another Embodiment of a nozzle array, in which case Air extraction devices between the individual upper nozzle fields can be seen through which the boundary layer is suctioned off.

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)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Claims (5)

  1. Procédé pour la trempe de pièces d'acier relativement minces à refroidir rapidement dans un four à rouleaux, les pièces d'acier étant amenées après une phase d'échauffement dans la zone dite de haute température au-dessus de 800 à 1250°C en étant appliquées directement sur des rouleaux en céramique du four à rouleaux et transportées sur le transporteur à rouleaux dans la zone de refroidissement, caractéristisé en ce que les pièces d'acier sont refroidies, de manière spatialement uniforme, localement simultanée et très rapide, au-dessous la température du début de formation de martensite dans la zone de refroidissement, au moyen de champs de buses d'air émettrices d'écoulements à jets concourants disposés aussi bien au-dessus qu'au-dessous du transporteur à rouleaux.
  2. Procédé selon la revendication 1, caractérisé en ce qu'une aspiration d'air est effectuée entre les champs de buses afin d'aspirer la couche limite.
  3. Procédé selon la revendication 1, caractérisé en ce que le refroidissement s'effectue avec des coefficients de transmission de chaleur compris entre 1000 et 4000 W/m2K.
  4. Procédé selon la revendication 1, caractérisé en ce que la trempe concerne des pièces d'acier telles que des bagues de roulements à billes, des couteaux, des scies, des pinces, des fraises et objets analogues.
  5. Procédé selon la revendication 1, caractérisé en ce que les buses d'air sont actionnées en continu ou par impulsions.
EP93922928A 1992-10-10 1993-10-11 Procede de traitement thermique de produits metalliques Expired - Lifetime EP0616646B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4234285A DE4234285A1 (de) 1992-10-10 1992-10-10 Verfahren zur Wärmebehandlung von metallischem Gut
DE4234285 1992-10-10
PCT/EP1993/002777 WO1994009164A1 (fr) 1992-10-10 1993-10-11 Procede de traitement thermique de produits metalliques

Publications (2)

Publication Number Publication Date
EP0616646A1 EP0616646A1 (fr) 1994-09-28
EP0616646B1 true EP0616646B1 (fr) 1999-01-13

Family

ID=6470217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93922928A Expired - Lifetime EP0616646B1 (fr) 1992-10-10 1993-10-11 Procede de traitement thermique de produits metalliques

Country Status (4)

Country Link
EP (1) EP0616646B1 (fr)
AT (1) ATE175724T1 (fr)
DE (2) DE4234285A1 (fr)
WO (1) WO1994009164A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE737755T1 (de) * 1995-04-13 1998-01-29 Patherm Sa Verfahren und Vorrichtung zur Wärmebehandlung von Werkstücken
EP0737755B1 (fr) * 1995-04-13 2001-11-07 Patherm SA Procédé de traitement thermique et installation pour la mise en oeuvre de ce procédé
DE29603022U1 (de) * 1996-02-21 1996-04-18 Ipsen Industries International GmbH, 47533 Kleve Vorrichtung zum Abschrecken metallischer Werkstücke
DE102008050927B4 (de) * 2008-10-10 2014-12-11 Manfred Husslein Energetisch optimiertes Verfahren, bei dem Werkstücke erhitzt werden, sowie Werkstückförderer und Wärmeübertragungseinheit
CN103146902B (zh) * 2012-12-19 2015-02-04 烟台金光工具有限公司 一种锯条热处理自动生产线
DE102016118253A1 (de) 2016-09-27 2018-03-29 Schwartz Gmbh Verfahren zur Wärmebehandlung eines metallischen Bauteils

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU553939A3 (ru) * 1971-12-06 1977-04-05 Кавасаки Юкогио Кабусики Кайся (Фирма) Устройство дл охлаждени изделий
JPS5421943A (en) * 1977-07-21 1979-02-19 Honda Motor Co Ltd Method and apparatus for heat treatment of steel such as soft steel
DE3234863C2 (de) * 1982-09-21 1986-04-10 Messer Griesheim Gmbh, 6000 Frankfurt Verfahren und Vorrichtung zum Blankglühen von metallischen Werkstücken mit Stickstoff als Schutzgas
FR2536160A1 (fr) * 1982-11-17 1984-05-18 Piezo Ceram Electronique Four continu de brasure de composants electroniques
FR2578553B1 (fr) * 1985-03-06 1989-01-06 Bertin & Cie Installation de refroidissement par pulverisation
DE4024605A1 (de) * 1990-08-02 1992-02-06 Wsp Ingenieurgesellschaft Fuer Vorrichtung zur abkuehlung von strangpressprofilen

Also Published As

Publication number Publication date
DE4234285A1 (de) 1994-04-14
EP0616646A1 (fr) 1994-09-28
WO1994009164A1 (fr) 1994-04-28
ATE175724T1 (de) 1999-01-15
DE59309308D1 (de) 1999-02-25

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