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1. WO2019043161 - METHOD FOR HEATING A METAL COMPONENT TO A TARGET TEMPERATURE AND CORRESPONDING ROLLER HEARTH FURNACE

Publication Number WO/2019/043161
Publication Date 07.03.2019
International Application No. PCT/EP2018/073474
International Filing Date 31.08.2018
IPC
C21D 9/00 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
F27B 9/24 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS, OVENS OR RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
9Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
14characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
20the charge moving in a substantially straight path
24being carried by a conveyor
CPC
C21D 1/673
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
62Quenching devices
673for die quenching
C21D 9/0056
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
0056Furnaces through which the charge is moved in a horizontal straight path
F27B 9/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
9Furnaces through which the charge is moved mechanically, e.g. of tunnel type
06heated without contact between combustion gases and charge; electrically heated
10heated by hot air or gas
F27B 9/2407
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
9Furnaces through which the charge is moved mechanically, e.g. of tunnel type
14characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
20the charge moving in a substantially straight path ; tunnel furnace
24being carried by a conveyor
2407the conveyor being constituted by rollers (roller hearth furnace)
F27D 19/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
19Arrangements of controlling devices
F27D 21/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
21Arrangements of monitoring devices; Arrangements of safety devices
Applicants
  • SCHWARTZ GMBH [DE]/[DE]
Inventors
  • WINKEL, Jörg
  • REINARTZ, Andreas
  • WILDEN, Frank
Agents
  • HEINE, Christian
Priority Data
10 2017 120 128.901.09.2017DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUM ERWÄRMEN EINES METALLISCHEN BAUTEILS AUF EINE ZIELTEMPERATUR UND ENTSPRECHENDER ROLLENHERDOFEN
(EN) METHOD FOR HEATING A METAL COMPONENT TO A TARGET TEMPERATURE AND CORRESPONDING ROLLER HEARTH FURNACE
(FR) PROCÉDÉ POUR CHAUFFER UNE PIÈCE MÉTALLIQUE À UNE TEMPÉRATURE FINALE ET FOUR À ROULEAUX CORRESPONDANT
Abstract
(DE)
Das Verfahren zum Erwärmen eines metallischen Bauteils (2) auf eine Zieltemperatur (3), bei dem das Bauteil (2) eine Vorbeschichtung (7) aufweist und durch einen Ofen (1) geführt wird, der mindestens vier Zonen (9, 10, 11, 12) aufweist, die jeweils auf eine individuelle Zonentemperatur (13, 14, 15, 3) temperiert werden können, wobei das Bauteil (2) nacheinander zumindest durch eine Anheizzone (9), eine Plateauzone (10), eine Spitzenheizzone (11) und eine Endzone (12) geführt wird, wobei die Anheizzone (9) auf eine Anheiztemperatur (13), die Plateauzone (10) auf eine Plateautemperatur (14), die Spitzenheizzone (11) auf eine Spitzentemperatur (15) und die Endzone (12) auf die Zieltemperatur (3) temperiert wird, wobei die Plateautemperatur (14) so gewählt wird, dass die Temperatur des Bauteils (2) in der Plateauzone (10) in einem Korridorbereich um eine Schmelztemperatur der Vorbeschichtung (7) liegt, ist dadurch gekennzeichnet, dass die Spitzentemperatur (15) um mindestens 100 K [Kelvin] oberhalb der Zieltemperatur (3) liegt.
(EN)
The method for heating a metal component (2) to a target temperature (3), in which the component (2) has a preliminary coating (7) and is passed through a furnace (1) that has at least four zones (9, 10, 11, 12), which can be respectively adjusted to an individual zone temperature (13, 14, 15, 3), wherein the component (2) is passed successively through at least an initial heating zone (9), a plateau zone (10), a peak heating zone (11) and an end zone (12) and wherein the initial heating zone (9) is adjusted to an initial heating temperature (13), the plateau zone (10) is adjusted to a plateau temperature (14), the peak heating zone (11) is adjusted to a peak temperature (15) and the end zone (12) is adjusted to the target temperature (3), the plateau temperature (14) being chosen such that the temperature of the component (2) in the plateau zone (10) lies in a band around a melting temperature of the preliminary coating (7), is characterized in that the peak temperature (15) lies at least 100 K [kelvins] above the target temperature (3).
(FR)
L'invention concerne un procédé pour chauffer une pièce métallique (2) à une température finale (3), dans lequel la pièce (2) présente une précouche (7) et est dirigée dans un four (1) présentant au moins quatre zones (9, 10, 11, 12) dont la température peut être régulée à une température de zone individuelle (13, 14, 15, 3), la pièce (2) étant dirigée successivement au moins dans une zone d'allumage (9), une zone de plateau (10), une zone de chauffage maximal (11) et une zone finale (12), la zone d'allumage (9) étant régulée à une température d'allumage (13), la zone de plateau (10) étant régulée à une température de plateau (14), la zone de chauffage maximal (11) étant régulée à une température maximale (15) et la zone finale (12) étant régulée à la température finale (3), la température de plateau (14) étant choisie de manière à ce que la température de la pièce (2) dans la zone de plateau (10) se situe dans une zone couloir à une température de fusion de la précouche (7). Le procédé est caractérisé en ce que la température maximale (15) est au moins 100 K [kelvin] au-dessus de la température finale (3).
Also published as
MXMX/a/2020/002291
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