WO2016177733A1 - Procédé et dispositif de trempe de proche en proche par induction avec préchauffage commandable et avec un inducteur conçu pour le préchauffage et la trempe - Google Patents

Procédé et dispositif de trempe de proche en proche par induction avec préchauffage commandable et avec un inducteur conçu pour le préchauffage et la trempe Download PDF

Info

Publication number
WO2016177733A1
WO2016177733A1 PCT/EP2016/059894 EP2016059894W WO2016177733A1 WO 2016177733 A1 WO2016177733 A1 WO 2016177733A1 EP 2016059894 W EP2016059894 W EP 2016059894W WO 2016177733 A1 WO2016177733 A1 WO 2016177733A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductors
hardening
workpiece
preheating
conductor
Prior art date
Application number
PCT/EP2016/059894
Other languages
German (de)
English (en)
Inventor
Wolfgang Nierlich
Original Assignee
Wolfgang Nierlich
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 Wolfgang Nierlich filed Critical Wolfgang Nierlich
Publication of WO2016177733A1 publication Critical patent/WO2016177733A1/fr

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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • 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
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a method and an apparatus for inductive feed hardening of a metallic workpiece using controllable preheating and an inductor designed for preheating and hardening.
  • a preparatory oven treatment of the entire workpiece allows only limited to about 100 ° C increase in temperature.
  • An induction hardening which proceeds continuously in sections on a circular component, in particular the ring of a large roller bearing, is described in the publications DE 10 2005 006 701 B3, EP 2 088 21 1 A1, EP 1 988 179 A1, WO 2010/007635 A1 and WO 201 1 / 107869 A1.
  • individual (DE 10 2005 006 701 B3) or pairs (WO 201 1/107869 A1) inductors can rotate around the round workpiece.
  • DE 10 2013 208 478 A1 discloses a method for surface hardening of a metallic workpiece, in which first an area of the workpiece is heated with at least one inductor by the at least one inductor moving in a direction of movement at a predetermined speed along the surface of the workpiece is moved.
  • At least one cooling element cools the area by moving the at least one cooling element in the direction of movement at a predetermined speed.
  • the heating of the region by means of the at least one inductor along the surface of the workpiece is perpendicular to the direction of movement with different magnetic field strength.
  • the object of the invention is to provide a method and a device for inductive feed hardening of a metallic workpiece, in which the quality of the feed hardening is improved with reduced equipment complexity
  • an inductor which has an inductor coil with two coil parts (conductors), wherein one of these conductors is used for preheating and the other conductor for raising the temperature to Austenitmaschinestemperatur, said two conductors (Induktorspulenmaschine) are moved with variable distance from each other on the workpiece to be hardened and wherein the currents through these two conductors are independently adjustable.
  • the invention provides new electrical circuit concepts that allow inductive feed hardening with preheating of the surface layer using only a single inductor, which consists of at least one forwardly arranged in the direction of movement conductor as Vorissermspulenteil and arranged in the direction of movement behind the Vormérmspulenteil conductor as Härtespulenteil ,
  • temperature controls are preferably carried out in which local surface temperatures of the metallic workpiece are measured via color temperatures or light radiation spectra.
  • the treated metallic workpieces are preferably large, thick-walled components such as rings of large-diameter bearings. Based on a control and / or regulation of the distance between the preheating coil part and the hardening coil part of the inductor and optionally their respective heights or distances from the workpiece, the invention also provides a method for slipless inductive Feed hardening of circularly closed components with improved material properties in the start and end zones.
  • the invention also enables a slipless inductive feed hardening of large rail-shaped straight or annularly closed round steel workpieces, in particular of single or multi-row inner and outer rings large rolling bearings of all types, as used, inter alia, in rotor bearings of wind turbines, rolling mills and cranes. Since the profile of the cross section of these large bearing rings varies as described above, an adjustment of a locally different temperature introduction into the part is necessary for setting an optimum hardening depth profile at each point of the variable component contour. As particularly suitable for the formation of a desired, ductile structure which is not embrittled by supercritical coarse grain, a sufficiently deep and well-balanced, d. H. Not too strong preheating of the surface of the workpiece to be hardened on the surface before the actual austenitizing heating to hardening temperature with subsequent quenching has proven to be the case.
  • a controllable preheating effect in inductive feed hardening can be achieved by using only a single inductor and generator. According to the prior art, two inductors operated in tandem, each with its own power source, are required for this purpose.
  • the inventive coordinated control of distance, for example using a motor, and thermal effect, for example using an electrical circuit, the coil parts during the induction hardening process allows, for example, when hardening a rolling bearing ring independently optimized process control in start, feed and end zone.
  • the arrangement which is guided over the workpiece surface at a constant or variable speed, consists of at least and preferably one inductor coil, wherein a forwardly arranged conductor of the inductor coil serves for preheating (preheating coil part) and a second conductor of the inductor coil for heating up the desired hardening temperature, ie the desired Austenitmaschinestempe- temperature, is used (Härtespulenteil), which is followed by a mitbewegte mitbewegte quenching unit, for example, a shower.
  • the task of flexibly controllable preheating is solved by regulating the current through the individual coil conductors.
  • the magnetic field of the individual conductors (inductor coil parts) decreases inversely proportional to the distance.
  • both conductors Induktorspulenmaschine
  • both conductors on the side facing the workpiece to be hardened, to optimize the resulting Hutesiefenverlaufs in adaptation to the cross-sectional profile of the component also different degrees, bebestcht with a suitable, preferably soft magnetic material.
  • a suitable, preferably soft magnetic material In this way, the effect of the preheating by means of the first conductor (preheating coil part) arranged at the front and / or the main heat by means of the second conductor (hardening coil part) can be locally varied.
  • the magnetic fields for preheating and for inductive hardening are additionally set to the workpiece via a control or regulation of the spacing of the respective conductor (inductor coil part).
  • the control of the magnetic fields for preheating and curing is carried out according to an embodiment of the invention by suitable timing of the current flow through the two conductors (Induktorspulenmaschine).
  • the preheating effect can optionally also be influenced by attaching a cooling unit, for example a blower, between the two conductors (inductor coil parts).
  • a cooling unit for example a blower
  • the temperature of the surface or outer surface layer of the component before hardening can be lowered effectively in order to avoid overheated hardening or to promote temporary microstructural changes, for example perlite formation.
  • the two water-cooled coil parts of an inductor are connected in series and supplied via an AC voltage generator with an alternating current of constant effective value.
  • the invention proposes switching concepts with which a flexible control or preheating is possible before heating to hardening temperature.
  • FIG. 1 a shows a circuit concept for explaining a first exemplary embodiment of the invention
  • FIG. 1 b shows a circuit concept for explaining a second embodiment of the invention
  • FIG. 2 shows a circuit concept for explaining a third exemplary embodiment of the invention
  • FIG. 3 shows a circuit concept for explaining a fourth exemplary embodiment of the invention
  • FIG. 4 shows a circuit concept for explaining a fifth exemplary embodiment of the invention
  • FIG. 5 shows a circuit concept for explaining a sixth exemplary embodiment of the invention
  • FIG. 6 shows a diagram for illustrating the temperature / depth profile after the preheating before the action of the hardening part as a function of the distance between preheating and hardening coil part
  • FIG. 7 shows a diagram for illustrating the ratio of diffusion coefficients as a function of the temperature
  • Figure 8 is a block diagram for explaining the operation of the control unit of a device for inductive feed hardening
  • Figure 9 is a sketch for explaining the movement of the conductors and the cooling unit over the surface of the workpiece.
  • the two conductors of the inductor coil are also referred to as Induktorspulenmaschine.
  • FIG. 1a shows a circuit concept for explaining a first exemplary embodiment of the invention.
  • the two inductor coil parts VW and HT are connected in parallel.
  • a common alternator G is provided, which is connected to the input of the parallel circuit.
  • the output of the parallel circuit is connected to the alternator G via a common return conductor RL.
  • the effect of the preheating coil part VW is set via a controllable component R connected upstream of the preheating coil part.
  • This controllable component R is, for example, a variable resistor, a variable inductance and / or a switching element with which the rms value of the current is set by changing the ratio of switch-on to switch-off time.
  • the control signals for the controllable component R are provided by a control unit which is not shown in FIG. 1 a.
  • FIG. 1b shows a circuit concept for explaining a second exemplary embodiment of the invention. Also in this second embodiment, the two Induktorspulen any VW and HT are connected in parallel. To supply these two Induktorspulenmaschine a common alternator G is provided, which is connected to the input of the parallel circuit. The output of the parallel circuit is connected to the alternator G via a common return conductor RL.
  • the direction of current flow through the preheating coil part VW is reversed. Consequently, in this circuit concept there is an opposite direction of the current flow through the two inductor coil parts.
  • the effect of the preheating coil part VW is set via a controllable component R connected upstream of the preheating coil part.
  • This controllable component R is also here a variable resistor, a variable inductance and / or a switching element with which the rms value of the current is set by changing the ratio of switch-on to switch-off time.
  • the control signals for the controllable component R are provided by a control unit which is not shown in FIG. 1b.
  • FIG. 2 shows a circuit concept for explaining a third exemplary embodiment of the invention. Also in this third embodiment, the two inductor coil parts VW and HT are connected in parallel. To supply these two Induktorspulener a common alternator G is provided, which is connected to the input of the parallel circuit. The output of the parallel circuit is connected to the alternator G via a common return conductor RL.
  • the preheating coil part VW is preceded by a controllable component R1 and the hardening coil part HT is a controllable component R2.
  • These controllable components R1 and R2 may each be a variable resistor, a variable inductance and / or a switching element for varying the effective current value over the ratio of switch-on to switch-off time.
  • the control signals for the controllable components R1 and R2 are provided by a control unit which is not shown in FIG.
  • the direction of current flow through the two inductor coil parts can also be opposite.
  • FIG. 3 shows a circuit concept for explaining a fourth exemplary embodiment of the invention.
  • the two Induktorspulen kind VW and HT are connected in parallel.
  • the inductor coil part VW is preceded by a semiconductor switch S1 and the inductor coil part HT, a semiconductor switch S2.
  • the high-frequency alternating current provided by an alternator G is reciprocated between the two inductor coil parts VW and HT using an adjustable-duty-cycle pulse width modulated control signal provided by a control and regulating unit not shown in FIG connected.
  • At least the common return conductor RL is designed as a highly flexible cable with low resistance and low inductance. Highly flexible HF strands or copper foils, for example, are suitable.
  • the ratio of the respective switch-on times determines this Ratio of the heat energy transferred via the respective inductor coil part for heating the metal part. The switching takes place in each case in the vicinity of the current zero crossing, wherein advantageously one switch is first turned on and only then the other switch is opened.
  • FIG. 4 shows a circuit concept for explaining a fifth exemplary embodiment of the invention.
  • the two Induktorspulen surely HT and VW are connected in series.
  • a DC generator G is provided to supply the two Induktorspulenmaschine HT and VW.
  • the DC generator G is connected to a terminal of the inductor coil part HT.
  • the other terminal of the inductor coil part HT is connected to one terminal of the inductor coil part VW.
  • the other terminal of the inductor coil part VW is connected to the DC generator G via a return line RL.
  • the inductor coil part VW is a switch S connected in parallel.
  • a clocked short-circuiting of the inductor coil part VW is provided, which takes place using a control signal provided by a not shown control unit. Again, the switching takes place in an advantageous manner in the vicinity of the current zero crossing. Furthermore, the switching between the two Induktorspulen inconvenience at constant voltage RMS occurs.
  • the current conductors are preferably designed as low-inductance and low-resistance highly flexible lines. With reference to the resistance lining, highly flexible ribbon cables have proved to be particularly advantageous.
  • FIG. 5 shows a circuit concept for explaining a sixth exemplary embodiment of the invention, in which IGBTs are used as semiconductor switches. Also in this embodiment, the two inductor coil parts VW and HT are connected in parallel. In this sixth embodiment, the inductor coil part VW is preceded by an IGBT1 and the inductor coil part HT by an IGBT2. In this sixth embodiment, the high-frequency alternating current provided by an alternator G is switched between the two inductor coil parts VW and HT by using control signals provided by a control unit not shown in FIG. 5 and using the IGBTs.
  • the circuit concepts described above with reference to Figures 1 a to 5 provide the possibility of adjusting the distance between the two Induktorspulen surely during the heat treatment process, for example using a motor. By suitably setting this distance, the effect of preheating during hardening in the feed area is optimized.
  • the temperature increases at greater depths of the component after passing the preheating and before the arrival of the hardening at the same point due to the heat conduction.
  • the edge layer can be thermally best prepared before heating to hardening temperature, followed by quenching, in order to achieve a high edge hardening depth in the case of ductile, fine-grained hardness structure.
  • edge hardening depth SHD The relationship between the edge hardening depth SHD and the distance d between the two Induktorspulen constitution illustrated in Figure 6 in a schematic representation.
  • room temperature initially prevails in the entire component.
  • the required edge hardening depth is often several mm up to about 1 cm.
  • an optimal distance d between the two inductor coil parts ie between the preheating coil part and the hardening coil part, can be determined using simple tests, if necessary with the aid of supporting simulation calculations.
  • the resulting edge hardening depth is increased because during subsequent heating to hardening temperature of the heat dissipation and thus the temperature decrease in the component interior is weakened because of the reduced temperature gradient.
  • Suitable surface temperatures during preheating are for example between about 300 ° C to about 700 ° C. However, higher values around or above 800.degree. C.
  • a blower used for this purpose which is moved between the preheating and hardening coil parts, can be constructed such that its position between the two parts of the inductor coil is controllably variable and, if required, introduced at a suitable time, for example in the starting zone, and removed in the end zone can be.
  • the influence depth up to which the temperature in the workpiece edge layer during preheating in preparation for the subsequent austenitizing with the following hardening part is increased efficiently ie, for example, to more than 100 ° C., can be several mm to more than 10 mm.
  • a temperature between about 300 ° C and 500 ° C during preheating is still achieved at half the edge hardening depth.
  • mid-frequency generators in the lower kHz range is particularly well suited for inductive feed hardening by means of the inductor according to the invention both for preheating (VW) and for austenitizing (HT) before quenching.
  • VW preheating
  • HT austenitizing
  • the current penetration depth thereby increases, which in the case of thick-walled components, for example in large bearing rings, the achievement of a large hardening depth even with short-time hardening at relatively fast feed with, for example, over 200 mm / min moving speed with lower heat conduction contribution, which is very favorable for the resulting structure, promotes.
  • the heating rate is not too high, which reduces the risk of overheating in the near-surface workpiece area and increases the depth of preheating and thus the achievable edge hardness.
  • circuit concepts shown in Figures 1 a to 5 also make it possible to use the same bevelling in preheating and hardness inductor coil part, since the desired different heating effect can be achieved alone by control or timing.
  • This process variant allows a particularly flexible process management, which is particularly favorable for the start and end zone.
  • FIG. 7 shows a diagram in which the ratio VH of the diffusion coefficients of the respectively indicated element dissolved in the steel, for example sulfur, chromium, manganese and nickel, and carbon in austenitic iron and to the right is shown Temperature TE is plotted.
  • Sulfur is a typical element that promotes grain boundary formation by segregation or segregation. Its relative mobility with respect to interstitially embedded carbon increases by an order of magnitude with the austenitizing temperature between 900 and 1300 ° C. Segregation is also an exothermic process. The occupation of the grain boundaries thus decreases with increasing temperature. This tendency is indicated in the figure 7 with the dashed arrow.
  • FIG. 7 also illustrates the change in the relative mobility of the substitutional alloying elements which are important for the hardening of steel on the basis of three examples.
  • Increasing the austenitizing temperature from 900 to 1300 ° C during short-term curing increases the relative diffusion coefficient of chromium, manganese and nickel in comparison to carbon by almost two orders of magnitude. This results in a particularly homogeneous distribution of the alloying elements. The hardenability is improved. Above all, however, the (micro) toughness and the (rolling) fatigue stability of the microstructure increase, which also leads to a high resistance to early failures due to the formation of so-called white etching cracks from the surface
  • the control of the measured in the direction of movement of the inductor, which runs along the length or along the circumference of a straight or annularly closed component, distance of preheating and hardening coil part, which preferably takes place by means of a motor, also allows an optimized process control in the start and end zone of a round component.
  • the ring serves a large bearing. Thanks coordinated control of thermal effect, as explained with reference to Figures 1 a to 5, and distance of the two Induktorspulenmaschine can be achieved by setting different in start, feed and end zone setting a best result of the heat treatment.
  • the transition between two areas can be flexibly carried out for a favorable heat treatment result on the entire circular component. This will be exemplified below for a slipless inductive feed hardening of the ring of a large-scale warehouse.
  • Two inductors of the type according to the invention are used.
  • the inductive surface layer feed hardening which essentially encompasses the contact surfaces, for example the raceway and the shelves, begins in a starting zone, which may for example enclose some 10 cm at the circumference of the large bearing ring.
  • the two inductors first hardening part to hardening part together and are now turned on.
  • the distance between preheating and hardening coil part is minimal.
  • Each preheating part is supplied with the aid of one of the circuit concepts according to the invention in comparison to the hardened part with less current, so that an optimal thermal preparation of the surface layer with suitable, especially at the surface not too high temperature in the next feed is possible.
  • the two inductors then run apart, wherein the distance between the respective preheating and hardening part is increased as quickly as possible to the optimum distance for the inductive hardening in the feed area with the aid of the motors and optionally at an appropriate time an intermediate cooling unit, for example High-performance blower, is introduced.
  • the shower of one and then of the other inductor is first introduced and quenched, for example, with a dilute aqueous polymer solution.
  • each inductor is followed by a cooling unit, for example attached to the same carrier, moving around the circumference of the ring.
  • the preheating coil part is continuously preheated in both directions, further heated with the hardening part to austenitizing temperature and then quenched with the shower head.
  • the inductive feed hardening is operated at the same speed of the inductors, which is preferably the case, then each inductor covers one half of the circumference of the ring.
  • the preheating parts located in the direction of movement approach each other. At a suitable distance from the point of contact in the end zone, the distance between the preheating and hardening part is reduced again and, if appropriate, the intermediate cooling unit is removed at a suitable time.
  • the current in the two coil parts can be changed by the control unit.
  • both Induktorspulenmaschine work closely together as hardened parts. They are removed and finally the end zone is quenched, which ensures slip-free hardening without the appearance of a weak, soft transition zone.
  • Other process control in start and end zones are also possible.
  • additional inductors for example in oscillating operation, and / or further quenching nozzles can be used there.
  • one or both of the in-feed inductors may oscillate in the start zone prior to divergence.
  • steels having a carbon concentration of 0.2 to 2.0 wt .-%, in particular between 0.35 and 1, 1 wt .-%, treated by the method according to the invention include, in particular, tempered and roller bearing steels.
  • suitable steel grades are 34Cr4, 34CrMo4, 36CrNiMo4, 37Cr4, 41Cr4, 42CrMo4, 50CrMo4, C53, 80MoCrV42-16, C100 and 100Cr6 and its higher alloyed derivatives, including 100CrMn6, 100CrMo7 and 100CrMnMo8.
  • Particularly favorable is a tempered material in the initial state.
  • carburized case hardened steels, gray and malleable cast iron can be inductively hardened in accordance with the invention in the surface layer.
  • local surface temperatures on the workpiece to be treated are measured via color temperatures or radiation spectra for a temperature control on the preheating and / or hardening column part.
  • part of the light radiation of a local workpiece surface part is detected via at least one light guide, preferably embodied as a thin quartz glass strip, forwarded to a detector via total reflection and at least one via the Plank radiation law, Wien's displacement law and / or the light color measured local temperature of the workpiece to be hardened.
  • the wavelength of the maximum of the emitted spectrum is inversely proportional to the absolute temperature of the radiating surface according to Wien's law of displacement.
  • An advantageous, cost-effective temperature measurement option is the measurement of the color temperature.
  • the electromagnetic radiation radiated from the heated metallic workpiece and forwarded via the quartz glass optical waveguide is switched to a color measuring head and the local metal temperature is calculated from the red, green and blue values, the color locus or other color space values.
  • FIG. 8 shows a block diagram for explaining the basic mode of operation of the control unit SR of a device for inductive feed hardening.
  • the control and regulation unit SR contains a memory SP in which data corresponding to the work program of the control unit and further data, which were determined in advance and are needed to control the method according to the invention, are stored. are deposited.
  • the control and regulation unit SR is supplied with measurement data which are provided, for example, by sensors.
  • These sensors include, among other things, a temperature sensor St, whose output signal provides information about a current surface temperature of the metallic workpiece, a speed sensor Sv, whose output signal provides information about the instantaneous feed rate of the two conductors of the inductor coil, and a distance sensor Sd, the output signal information about the instantaneous distance between the two conductors of the inductor coil supplies.
  • a temperature sensor St whose output signal provides information about a current surface temperature of the metallic workpiece
  • a speed sensor Sv whose output signal provides information about the instantaneous feed rate of the two conductors of the inductor coil
  • a distance sensor Sd the output signal information about the instantaneous distance between the two conductors of the inductor coil supplies.
  • control unit sets control signals s1 for a variable resistor R1, control signals s2 for a variable resistor R2, control signals s3 for a motor M1 for controlling the feed rate of the preheating coil portion, and control signals s4 for a motor M2 for controlling the feed rate of the coil portion for increasing the temperature to a desired Austenitmaschinestemperatur ready.
  • FIG. 9 shows a sketch for explaining the movement of the conductors and the cooling unit over the surface of the metallic workpiece to be hardened, for example a roller bearing ring.
  • the conductor VW heating coil part
  • the conductor HT hardening coil part
  • the cooling unit KU at a velocity v in one direction over the surface of the Workpiece W to be moved.
  • the distance between the conductor VW and the conductor HT can be varied and also the current flowing through one of the conductors can be adjusted individually or the currents flowing through the two conductors can be adjusted independently of one another.
  • the predetermined speed v of the control unit can be changed if necessary.

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)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un procédé et un dispositif de trempe de proche en proche par induction d'une pièce métallique, comprenant le déplacement, le long de la surface la pièce, d'au moins une bobine d'induction dotée d'au moins deux conducteurs formant des éléments de bobine pour le chauffage de la couche superficielle de la pièce, suivie d'au moins une unité de refroidissement pour le refroidissement de la couche superficielle chauffée, à une vitesse prédéfinie dans une direction, un conducteur de la bobine d'induction étant utilisé pour le préchauffage et le deuxième conducteur de la bobine d'induction étant utilisé pour l'élévation de la température à une température d'austénitisation souhaitée, et les deux conducteurs étant déplacés le long de la pièce à tremper à une distance variable l'un de l'autre, et le courant circulant à travers l'un des deux conducteurs pouvant être réglé individuellement, ou les courants circulant à travers les deux conducteurs pouvant être réglés individuellement indépendamment l'un de l'autre.
PCT/EP2016/059894 2015-05-06 2016-05-03 Procédé et dispositif de trempe de proche en proche par induction avec préchauffage commandable et avec un inducteur conçu pour le préchauffage et la trempe WO2016177733A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015107095.2 2015-05-06
DE102015107095.2A DE102015107095A1 (de) 2015-05-06 2015-05-06 Verfahren und Vorrichtung zum induktiven Vorschubhärten mit steuerbarem Vorwärmen und einem zum Vorwärmen und Härten ausgebildeten Induktor

Publications (1)

Publication Number Publication Date
WO2016177733A1 true WO2016177733A1 (fr) 2016-11-10

Family

ID=56068841

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/059894 WO2016177733A1 (fr) 2015-05-06 2016-05-03 Procédé et dispositif de trempe de proche en proche par induction avec préchauffage commandable et avec un inducteur conçu pour le préchauffage et la trempe

Country Status (2)

Country Link
DE (1) DE102015107095A1 (fr)
WO (1) WO2016177733A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201999A1 (de) * 2019-02-14 2020-08-20 Thyssenkrupp Ag Vorrichtung und Verfahren zum induktiven Schusshärten von Wälzlagerlaufbahnen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018202270A1 (de) * 2018-02-14 2019-08-14 Thyssenkrupp Ag Induktionsvorrichtung und System aus Wälzlagerkomponente und Induktionsvorrichtung
DE102020202108A1 (de) 2020-02-19 2021-08-19 MTU Aero Engines AG Induktionseinrichtung und Verfahren zum Betreiben einer Induktionseinrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006701B3 (de) 2005-02-15 2006-03-30 Rothe Erde Gmbh Verfahren zum Herstellen eines Lagerringes für Großwälzlager
EP1988179A2 (fr) 2007-04-13 2008-11-05 Saet S.p.A. Dispositif et procédé pour réaliser un traitement localisé de durcissement par induction sur des composants mécaniques, en particulier des butées pour des paliers à roulement de grande taille
WO2010007635A1 (fr) 2008-07-15 2010-01-21 Saet S.P.A. Procédé et dispositif pour traitement de durcissement par induction localisé de composants mécaniques, notamment de blocs de poussée pour paliers à rouleau de grande taille
WO2011107869A1 (fr) 2010-03-05 2011-09-09 Saet S.P.A. Procédé et dispositif pour durcissement par induction localisée de parties constitutives mécaniques circulaires de grande taille, en particulier des bagues pour roulements à billes
US20110248023A1 (en) * 2010-04-13 2011-10-13 Doyon Gary A Induction heat treatment of an annular workpiece
DE102013208478A1 (de) 2013-05-08 2014-11-13 Aktiebolaget Skf Verfahren zum Randschichthärten eines metallischen Bauteils

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006701B3 (de) 2005-02-15 2006-03-30 Rothe Erde Gmbh Verfahren zum Herstellen eines Lagerringes für Großwälzlager
EP1988179A2 (fr) 2007-04-13 2008-11-05 Saet S.p.A. Dispositif et procédé pour réaliser un traitement localisé de durcissement par induction sur des composants mécaniques, en particulier des butées pour des paliers à roulement de grande taille
EP2088211A1 (fr) 2007-04-13 2009-08-12 Saet S.p.A. Dispositifs pour réaliser un traitement localisé de durcissement par induction sur des composants mécaniques, en particulier des butées pour des paliers à roulement de grande taille
WO2010007635A1 (fr) 2008-07-15 2010-01-21 Saet S.P.A. Procédé et dispositif pour traitement de durcissement par induction localisé de composants mécaniques, notamment de blocs de poussée pour paliers à rouleau de grande taille
WO2011107869A1 (fr) 2010-03-05 2011-09-09 Saet S.P.A. Procédé et dispositif pour durcissement par induction localisée de parties constitutives mécaniques circulaires de grande taille, en particulier des bagues pour roulements à billes
EP2542707A1 (fr) * 2010-03-05 2013-01-09 Saet S.p.A. Procédé et dispositif pour durcissement par induction localisée de parties constitutives mécaniques circulaires de grande taille, en particulier des bagues pour roulements à billes
US20110248023A1 (en) * 2010-04-13 2011-10-13 Doyon Gary A Induction heat treatment of an annular workpiece
DE102013208478A1 (de) 2013-05-08 2014-11-13 Aktiebolaget Skf Verfahren zum Randschichthärten eines metallischen Bauteils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201999A1 (de) * 2019-02-14 2020-08-20 Thyssenkrupp Ag Vorrichtung und Verfahren zum induktiven Schusshärten von Wälzlagerlaufbahnen

Also Published As

Publication number Publication date
DE102015107095A1 (de) 2016-11-10

Similar Documents

Publication Publication Date Title
DE102006003014B3 (de) Verfahren zum Härten eines einen geschlossenen Kurvenzug beschreibenden Werkstücks
EP2185735B1 (fr) Procédé et dispositif pour la trempe de profilés
EP0384964B1 (fr) Procédé et dispositif pour le durcissement par induction des surfaces ondulées d'une pièce
DE102005061670B4 (de) Verfahren zum induktiven Erwärmen eines Werkstücks
EP2310543B1 (fr) Procédé de trempe d'au moins une piste de roulement d'un anneau d'appui pour un palier à roulements à grande dimension
WO2016177733A1 (fr) Procédé et dispositif de trempe de proche en proche par induction avec préchauffage commandable et avec un inducteur conçu pour le préchauffage et la trempe
EP2801628B1 (fr) Procédé de trempe superficielle d'un composant métallique
EP2028281A1 (fr) Traitement thermique d'une bande laminée flexible
DE1292696B (de) Verfahren zur Erhoehung der Lebensdauer von Waelzpaarungen
EP2814990A1 (fr) Procédé de trempe superficielle par induction d'une surface annulaire
WO2018215484A1 (fr) Procédé et dispositif de durcissement par induction d'un vilebrequin
EP4107296A1 (fr) Procédé de durcissement de surface par induction
EP3597802B1 (fr) Garniture de carde faite de bandes métalliques et son procédé de fabrication
CH711031B1 (de) Verfahren zur Herstellung von Führungsschienen für ein Linearwälzlager.
CH712310A2 (de) Metallkreissägeblatt und Verfahren zum Herstellen eines Metallkreissägeblattes.
WO2015124585A1 (fr) Système, installation de fabrication et procédé
DE102022200324A1 (de) Induktionshärteanlage und Induktionshärteverfahren
DE102019202000A1 (de) Vorrichtung und Verfahren zum induktiven Vorschubhärten von Wälzlagerlaufbahnen
EP2603350B1 (fr) Usinage de matériau assisté par chauffage inductif, en particulier usinage par enlèvement de copeaux d'alliages de titane ou de matériaux présentant un facteur de conductivité thermique comparativement faible
CH712700A2 (de) Verfahren zur Herstellung von Führungsschienen für ein Linearwälzlager.
DE19955670B4 (de) Verfahren und Vorrichtung zum Härten von Flächen einer Kurbel- oder Nockenwelle
WO2000063447A2 (fr) Procede et dispositif pour durcir des surfaces de vilebrequin ou d'arbre a cames
DE10144498C2 (de) Verfahren zur induktiven Oberflächenhärtung von Schienen und kompakter Abschnitte innerhalb von Schienenwegen oder anderer Profile
DE1205999B (de) Verfahren und Vorrichtung zum Oberflaechen-haerten von geschmiedeten oder gegossenenWalzen aus Stahl
DE102020103299A1 (de) Verfahren zum induktiven Randschichthärten

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16724317

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16724317

Country of ref document: EP

Kind code of ref document: A1