DE102014201259A1 - Heat treatment device - Google Patents

Abstract

The invention relates to a device and a method for the targeted component zone-specific heat treatment of sheet metal components. According to the invention, the heat treatment device has a production furnace which is suitable for heating a sheet steel blank to a temperature above the AC3 temperature. Furthermore, the heat treatment device according to the invention has a profiling device for impressing a temperature profile on the sheet steel plate, wherein the steel plate in a first range, a temperature below the AC3 temperature and in a second region, a temperature above the AC3 temperature can be impressed. The profiling has an upper part and a lower part, wherein the upper part is movable relative to the lower part and wherein the steel plate between the upper part and lower part is clamped and wherein the steel plate in the clamped state with the upper part and the lower part is at least partially in contact. The upper part and / or the lower part have different first and second zones, which can be tempered to different temperatures.

Description

The invention relates to a device and a method for the targeted component zone-specific heat treatment of sheet metal components.

In the art, in many applications in different industries there is a desire for high strength sheet metal parts with low part weight. For example, in the automotive industry, efforts are being made to reduce the fuel consumption of motor vehicles and to reduce CO2 emissions, while at the same time increasing occupant safety. There is therefore a rapidly increasing demand for body components with a favorable strength to weight ratio. These components include, in particular, A and B pillars, side impact beams in doors, sills, frame members, bumper, cross members for floor and roof, front and rear side members. In modern motor vehicles, the body shell with a safety cage usually consists of a hardened steel sheet with about 1,500 MPa strength. In many cases Al-Si-coated steel sheets are used. For the production of a component from hardened steel sheet the process of the so-called press hardening was developed. Steel sheets are first heated to austenite temperature between 850 ° C and 950 ° C, then placed in a press tool, quickly formed and quickly quenched by the water-cooled tool to martensite temperature of about 250 ° C. This results in hard, firm martensite with about 1.500MPa strength. However, such a hardened steel sheet has only about 6-8% elongation at break, which is disadvantageous in specific areas in the case of the collision of two vehicles, especially in a side impact. The kinetic energy of the penetrating vehicle can not be converted into deformation heat. Rather, in this case, the component will break brittle and also threatens to injure the occupants.

For the automotive industry, it is therefore desirable to obtain body components which have several different expansion and strength zones in the component, so that very strong areas on the one hand and very elastic areas on the other hand exist in one component. The general demands on a production plant should continue to be respected: so there should be no cycle time loss to the mold-hardening system, the entire system should be universally used without restrictions and can be quickly converted to customer-specific. The process should be robust and economical and the production plant need only minimal space. The shape and edge accuracy of the component should be so high that hard trimming can be largely eliminated in order to save material and labor.

To produce a component with regions of different hardness and ductility, different steels can be welded together so that non-hardenable steel is present in the soft and hardenable steel in the hard zones. In a subsequent hardening process, the desired hardness profile can be achieved over the component. The disadvantages of this method lie in the occasionally unsafe weld at a usually used for body parts AlSi-coated about 0.8-1.5mm thick sheet, the local rugged hardness transition and in the increased because of the additional manufacturing step of the welding costs of the sheet. Occasionally, tests have failed due to breakage near the weld, so the process can not be said to be robust. In addition, the process is limited in complex geometries.

From the German patent DE 10 2007 057 855 B3 a method is known in which a molded component in the form of a band made of a strip material with an AlSi-coated high-strength boron severed board first heated completely homogeneous to such a temperature and held for a certain time at this temperature level that a diffusion layer as corrosion - or scale protection layer forms, with material from the coating diffused into the base material. The heating temperature is about 830 ° C to 950 ° C. This homogeneous heating is carried out in a first zone of a continuous furnace having a plurality of temperature zones. Following this process step, a first type of board in a second zone of the furnace is cooled down to a temperature at which austenite decomposes. This takes place at about 550 ° C to 700 ° C. This lowered temperature level is maintained for a certain time, so that the decomposition of austenite proceeds properly. Simultaneously with the local cooling of the area of the first type of board, the temperature in a third zone of the furnace is kept just high enough in at least one area of the second type that sufficient martensite portions can still be formed in the subsequent hot forming in a corresponding press. This temperature is 830 ° C to 950 ° C. When cooling the area of the first type, this area of the board can be brought into contact with cooling jaws for a short time.

With this method, however, it is only possible to subject relatively simple and large-area geometries with usually only two different areas of a different heat treatment. Complex geometries, such as ductile point weld edges of an otherwise high-hardness B-pillar, which are formed almost anywhere in the room, can be carried along Do not heat appropriately in this procedure. In addition, the temperatures of the individual zones of the furnace must be controlled very accurately, with continuous furnaces on the other hand for economic reasons are usually heated with gas burners, which, however, can not regulate the temperatures of the individual zones with the required accuracy in a simple and inexpensive way.

From the European patent application EP 2 497 840 A1 a furnace system and a method for the targeted component zone-specific heat treatment of sheet metal components is known. The furnace system includes a common, universal production furnace for heating the steel sheet parts to a temperature close to but below the AC3 temperature, that is, the temperature at which the transformation of the ferrite into austenite terminates, the furnace system further comprising a profiling furnace having at least one Level. The at least one level has an upper and a lower part, as well as a product-specific intermediate flange introduced into a corresponding receptacle, the product-specific intermediate flange being designed to give the component a predetermined temperature profile with temperatures above the AC3 temperature for areas to be hardened and below Apply AC3 temperature for softer areas. The impressing of the temperature profile is done by means of thermal radiation. Since the method provides to heat the components in the production furnace only to a temperature below the AC3 temperature and to introduce the heat for the heating of defined areas to a temperature above the AC3 temperature in a later process step in the profiling oven is a very accurate temperature control Not required in the production furnace, so that the disadvantage of the lower controllability of gas burners over that of electric heaters in favor of the economy for the cheaper energy gas can be accepted. The disadvantage of this method is that the regions of different temperature are not exactly separable. In addition, the heat exchange via radiation happens relatively slowly, so that several Profilieröfen must be operated in parallel in order to exploit the potential capacity of the continuous furnace can.

The object of the invention is to provide a heat treatment device and a method for the targeted heat treatment of sheet metal components, wherein the disadvantages described above are minimized.

According to the invention, this object is achieved by a heat treatment device having the features of independent claim 1. Advantageous developments of the heat treatment device will become apparent from the dependent claims 2-17. The object is further achieved by a method according to claim 18 and by the alternative method according to claims 19 and 20.

According to the invention, the heat treatment device has a production furnace which is suitable for heating a sheet steel blank to a temperature above the AC3 temperature. Furthermore, the heat treatment device according to the invention has a profiling device for impressing a temperature profile on the sheet steel plate, wherein the steel plate in a first range, a temperature below the AC3 temperature and in a second region, a temperature above the AC3 temperature can be impressed. The profiling has an upper part and a lower part, wherein the upper part is movable relative to the lower part and wherein the sheet steel plate between upper part and lower part can be clamped. The upper part and / or the lower part have first and second zones, which can be temperature-controlled to different temperatures.

Due to the mobility of upper part to lower part, it is possible to insert the sheet metal blank in the profiling and then bring upper and / or lower part so close to the sheet metal blank that a heat transfer between the upper and lower part on the one hand and the sheet metal plate takes place on the other. Upper and / or lower part have differently tempered first and second zones, so that different temperatures can be imposed on the different first and second regions of the sheet metal blank.

In a preferred embodiment, the steel sheet is in the clamped state with the upper part and the lower part at least partially in contact. Due to the mobility of upper part to lower part, it is possible to insert the sheet metal blank in the profiling and then bring the sheet metal plate at least partially in contact with the upper and lower part. Due to the contact heat exchange occurs due to heat conduction between the surfaces of the upper or lower part with the board.

In an alternative embodiment, there is no contact between the upper and / or lower part on the one hand and the sheet steel plate. Due to the mobility of upper part to lower part lower and / or upper part come so close to the sheet steel plate that an effective heat transfer by heat radiation and / or convection takes place, but remain spaced from her.

In a first method according to the invention for impressing a temperature profile on a sheet steel plate with a temperature below the AC3 temperature in a first range and at a temperature above the AC3 temperature in a second range, the sheet metal blank is first heated in a production furnace to a temperature above the AC3 temperature to be subsequently transferred to the profiling apparatus where it clamped between the upper part and lower part and it is impressed by thermal conduction of the temperature profile. In this case, a first region, which should have a high ductility in the finished component, is cooled to a recrystallization temperature below the AC3 temperature by means of heat conduction, while a second region, which should have a particularly high hardness in the finished component, at a temperature above the AC3 Temperature is maintained. The cooling from the temperature imposed by the production furnace above AC3 occurs so slowly that the microstructure can recrystallize. The AC3 temperature, like the recrystallization temperature, is alloy dependent. In the materials commonly used for vehicle body components, the AC3 temperature is around 870 ° C, while the recrystallization temperature, at which ferrite-pearlitic structure sets, is around 800 ° C.

If coated steel sheets are processed in which the coating is alloyed with the substrate, as in the case of AlSi-coated steel sheets, for example, the steel sheet can also be heated to a diffusion temperature of 950 ° C. in the production furnace.

In a second, alternative method according to the invention for impressing a temperature profile on a steel sheet with a temperature below the AC3 temperature in a first region and with a temperature above the AC3 temperature in a second region, the metal sheet is first in a production furnace to a temperature below The AC3 temperature, for example, to a temperature of about 850 ° C, heated to be subsequently spent in the profiling, where it is clamped between the upper part and lower part and it is impressed by thermal conduction of the temperature profile. In this case, the steel sheet is in a first region, which should have a high ductility in the finished component, slowly cooled to recrystallization temperature, for example, 800 ° C, while a second region, which should have a particularly high hardness in the finished component, to a temperature above AC3 temperature of, for example, 870 ° C is heated by heat conduction.

When coated steel sheets are processed where the coating is alloyed with the substrate, such as AlSi-coated steel sheets, the temperature and time dependent diffusion process of the coating into the substrate in the production furnace can be started while a residual diffusion time is spent in the profiler in this alternative process ,

This second, alternative method works more economically, since the steel plate in the production furnace only has to be heated to a lower temperature than in the first method variant, whereby the furnace can be made shorter and / or the throughput time can be shortened. The slow cooling time of the first region is used to heat the second region up to the temperature above the AC3 temperature and eventually complete the diffusion process of a coating into the substrate.

With the heat treatment apparatus according to the invention, sheet steel blanks having a plurality of first and / or second regions, which may also be complexly formed, can be economically stamped with a corresponding temperature profile, since the first and second zones of the profiling apparatus are better thermally separable from each other and provide a more severely sharp treatment first and second areas of the sheet steel board comes as this is possible in the heat treatment by heat radiation.

In an advantageous embodiment, the upper part and / or the lower part has a flat contact surface. This embodiment can be advantageously used for the heat treatment of flat sheet steel blanks.

In an alternative advantageous embodiment, the upper part and / or the lower part has a contact surface which is curved in space. Advantageously, the curvature of the contact surface or the contact surfaces of the spatial shape of the sheet metal blank is adapted when curved sheet metal blanks are to be heat treated in space.

It has proven to be advantageous if at least one of the different zones in the lower or upper part are liquid-temperature-controlled. By means of liquid temperature control, not only heat can be added, but also dissipated, so that zones can also be cooled specifically. As suitable liquids, for example, heat transfer oils or salt melts can be used.

Alternatively or in combination, at least one of the zones can also be electrically tempered. The cooling of a zone is done by slow cooling against the environment, this zone is not heated in this case. Advantageously, such a zone should not be thermally insulated from the environment. It can the electrical heating can be realized for example via induction or electrical resistance.

In another embodiment, at least one of the zones is gas-heated. Gas may already be available for the heating of the production furnace, so that no additional expense is required for the gas heating. Gas heating can be more economical than electric heating.

In a particularly advantageous embodiment, different Temperierungsarten are combined. For example, one zone may be electrically heated, while another is liquid-tempered. The electric heater has the advantage of fast response, while the liquid temperature control offers the advantage of targeted cooling. If certain zones have to be heated and other zones simultaneously cooled, such an embodiment offers particularly great advantages.

It has proved to be advantageous if at least one of the zones of the lower and / or upper part is thermally insulated from another of the zones in the lower and / or upper part. The insulation may consist of an introduced intermediate layer, for example of a thermosetting plastic or of a ceramic material. But it is also alternatively or additionally possible to provide a gap for isolation between the zones. This gap can be filled in the simplest case with air. However, a greater insulation effect is achieved with a gap in which a negative pressure prevails.

In a further advantageous embodiment, the heat treatment device has a handling device arranged between the production furnace and the profiling device, which is designed to transfer the sheet steel plate from the production furnace into the profiling device.

A handling device makes it easier to handle the hot steel sheets. Moreover, in the automated process of placing the sheet steel blanks from the production furnace into the profiler, a substantially constant cycle time can be maintained, thereby maximizing process quality. Furthermore, the steel sheet can be positioned with a handling device very accurate and reproducible in the profiling, whereby the process quality is further maximized.

Furthermore, it has proven to be advantageous if the heat treatment device has a plurality of profiling devices. In most cases, the production furnace will have a higher capacity than the profiling device. Since handling devices with a corresponding capacity are available on the market, the profiling device is usually the cycle time determining component. The capacity of the heat treatment apparatus can be increased by increasing the capacity of the cycle time determining component of the entire apparatus. Therefore, the capacity of the heat treatment apparatus can be adapted to that of the production furnace in which a corresponding number of profiling devices are provided.

In addition, it has proved to be advantageous if the profiling has a product-specific adapter. This adapter can be designed, for example, as a stop for the sheet steel plate, so that the sheet steel plate can be inserted with great reproduction accuracy in the profiling. This is particularly important for increasing the quality if the sheet steel plate should have small first areas, which should have a high ductility in the finished component, as is the case for example with sheet steel body parts for the automotive industry, which are spot-welded in subsequent manufacturing steps. The spot welds should usually have high ductility, while in many applications the surrounding material should have high hardness. By a suitable stop the position accuracy of the sheet steel plate is increased in the profiling, whereby the position accuracy of the areas of different temperature in the sheet steel plate is increased.

Advantageously, the production furnace is a continuous furnace, since continuous furnaces usually have a higher throughput rate than chamber furnaces. In addition, it is advantageous if the production furnace is gas-fired, as this is the most economical type of heating.

The inventive method for impressing a temperature profile on the sheet steel plate, in which the sheet steel plate in a first range a temperature below the AC3 temperature and a second range is a temperature above the AC3 temperature aufprägbar is characterized in that the sheet steel plate initially in a production furnace is heated to a temperature above the AC3 temperature, the sheet steel plate is then placed in an upper part and a lower part having profiling, where it is clamped between the upper part and lower part and her the temperature profile is impressed.

In an advantageous embodiment of the method, the steel sheet is impressed on the temperature profile by thermal conduction.

In a further advantageous embodiment of the method, the sheet steel plate is first heated in a production furnace to a temperature below the AC3 temperature, in order subsequently to be placed in a top and a bottom profiling device, where it clamped between the upper part and lower part and imprints her the temperature profile becomes.

Further advantages, features and expedient developments of the invention will become apparent from the dependent claims and the following description of preferred embodiments with reference to the drawings.

From the pictures shows:

1 a heat treatment device according to the invention in a plan view

2 a profiling device according to the invention in a side section

3 the lower part of a profiling device according to the invention with inserted sheet steel plate in a plan view

1 shows a heat treatment device according to the invention 100 in a top view. A sheet steel plate 200 is from a first handling device 130 on a feed table 120 the heat treatment device 100 ready laid. From the entrance table 120 arrive steel sheet blanks 200 in the production furnace designed as a continuous furnace 110 and go through it in the direction of the arrow. The production furnace is equipped with gas burners whose flames 111 act in the oven room, heated. Seen in the direction of flow behind the production furnace 110 there is an exercise table 121 on which the heated sheet steel blanks 200 after passing through the production furnace 110 reach. From there, the sheet steel plates 200 from a second handling device 131 in one of three profiling devices 150 inserted.

In the figure are three profiling devices 150 shown, which are arranged side by side in a circular arc. This arrangement ensures that all three profiling 150 through the second handling device 131 can be charged. There may also be more or less profiling devices 150 be provided. The number of advantageously to be provided profiling 150 depends on the ratio of the cycle times of the production furnace 110 and the profiling device 150 The cycle times depend on the temperatures to be achieved and thus depend, inter alia, on the processed material of the sheet steel plate 200 , In addition, another arrangement of the several profiling devices 150 possible. It is conceivable, for example, an arrangement in which several profiling 150 are arranged vertically above one another.

2 shows a profiling device according to the invention 150 in a sidecut. top 160 and lower part 170 are vertically movable against each other, as the arrows should indicate. Be the top part 160 and lower part 170 moved vertically away from each other, the profiling device 150 opened and a sheet steel plate 200 can between the two parts 160 . 170 be inserted. In the figure, the profiling device 150 shown in the closed state, with a sheet steel plate 200 between shell 160 and lower part 170 is clamped. The top 160 has first zones 161 having a temperature below the AC3 temperature and a second zone 162 having a temperature above the AC3 temperature. Likewise, the lower part 170 first zones 171 having a temperature below the AC3 temperature and a second zone 172 having a temperature above the AC3 temperature. The zones 161 . 162 in the upper part 160 are due to a thermal insulation 167 separated from each other. Likewise, the zones 171 . 172 in the upper part 170 through a thermal insulation 177 separated from each other. In addition, the outer surfaces of upper part 160 and lower part 170 one insulation layer each 166 . 176 on. These insulations serve for thermal separation and may consist of suitable duroplastic or ceramic materials. As thermal separation between the first zones 161 . 171 and the second zones 162 . 172 come also between the zones arranged air gaps or evacuated interstices, in which there is a negative pressure to the vacuum, into consideration.

In the figure, each flat contact surfaces 165 . 175 from top 160 and lower part 170 shown. Such flat contact surfaces 165 . 175 are suitable for the heat treatment of substantially flat sheet steel blanks 200 at. Are the steel sheets to be treated 200 Curved in space, the contact surfaces 165 . 175 be adapted to such a curvature, so that they can be designed curved in space.

3 shows the lower part 170 a profiling device according to the invention 150 with inserted sheet steel plate 200 in a top view. The sheet steel plate 200 has first areas 210 on, which should have a large ductility in the later finished part. Is it the sheet steel plate 200 around a vehicle body part, it can in these first areas 210 For example, to act on the areas where the subsequent finished part is connected to the rest of the vehicle body by spot welding. These first areas 210 lie on first zones 171 of the lower part 170 which have a temperature below the AC3 temperature, for example, a temperature of about 600 ° C. Second areas 220 the sheet steel plate 200 , which should have a high hardness in the later finished part, in contrast, lie on second zones 172 of the lower part 170 which have a temperature above the AC3 temperature, for example 900 ° C. The first zones 171 are from the second zones 172 thermally insulated (not shown in the figure). Due to the thermal insulation 177 the zones 171 . 172 against each other is the thermal separation of the zones 171 . 172 maximized against each other, thereby also small-scale different first and second areas 210 . 220 in the sheet steel plate 200 let realize. Furthermore, the lower part 170 on its outer surfaces a thermal insulation 176 on.

In the heat treatment device 100 can use two different methods to impose a temperature profile on the sheet steel plate 200 with a temperature below the AC3 temperature in a first range 210 and at a temperature above the AC3 temperature, a second range 220 be realized.

In a first method, the sheet metal blank 200 initially in a production oven 110 heated to a temperature above the AC3 temperature, for example to 900 ° C, then into the profiling 150 to be spent where they are between top 160 and lower part 170 clamped and imposed by thermal conduction the temperature profile. This will be a first area 210 , which is to have a high ductility in the finished component, cooled to a recrystallization temperature below the AC3 temperature by means of heat conduction, while in a second region 220 , which should have a particularly high hardness in the finished component, a temperature above the AC3 temperature is maintained. At the same time cooling takes place from that through the production furnace 110 temperature above the AC3 temperature is so slow that the microstructure can recrystallize. These are located at the contact points of a first area 210 the sheet steel plate 200 with the shell 160 or the lower part 170 the profiling device 150 a first zone 161 in the upper part 160 or a first zone 171 in the lower part 170 which have a temperature below the AC3 temperature. For example, the first zones 161 . 171 have a temperature of about 600 ° C. Meanwhile, are at the contact point of a second area 220 the sheet steel plate 200 with the shell 160 or the lower part 170 the profiling device 150 a second zone 162 in the upper part 160 or a second zone 172 in the lower part 170 which have a temperature above the AC3 temperature, for example 900 ° C.

In a second, alternative method for impressing a temperature profile on the sheet steel plate 200 with a temperature below the AC3 temperature in a first range 210 and a temperature above the AC3 temperature a second range 220 becomes the sheet metal blank 200 initially in a production oven 110 heated to a temperature below the AC3 temperature, for example to a temperature of about 850 ° C, to subsequently in the profiling 150 to be spent where they are between top 160 and lower part 170 clamped and imposed by thermal conduction the temperature profile. This is the steel plate 200 in a first area 210 , which is to have a high ductility in the finished component, slowly cooled to recrystallization temperature of, for example, 800 ° C, while a second range 220 , which is to have a particularly high hardness in the finished component is heated to a temperature above the AC3 temperature of, for example, 870 ° C by means of heat conduction.

The embodiments shown herein are only examples of the present invention and therefore should not be considered as limiting. Alternative embodiments contemplated by one skilled in the art are equally within the scope of the present invention.

LIST OF REFERENCE NUMBERS

100

 Heat treatment device

110

 production furnace

111

 flame

120

 infeed table

121

 delivery table

130

 first handling device

131

 second handling device

150

 profiling device

160

 top

161

 first zone within the shell

162

 second zone within the shell

165

 Contact surface of the shell

166

 Outer isolation of the shell

167

 Zone isolation in the upper part

170

 lower part

171

 first zone within the lower part

172

 second zone within the lower part

175

 Contact surface of the lower part

176

 External insulation of the lower part

177

 Zone isolation in the lower part

200

 Steel sheet metal blank

210

 first area

220

 second area

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007057855 B3 [0005]
• EP 2497840 A1 [0007]

Claims (20)

Heat treatment device ( 100 ), comprising a production furnace ( 110 ) for heating a sheet steel plate ( 200 ) to a temperature above the AC3 temperature, and a profiling device ( 150 ) for impressing a temperature profile on the sheet steel plate ( 200 ), wherein the sheet steel plate ( 200 ) in a first area ( 210 ) a temperature below the AC3 temperature and in a second range ( 220 ) can be impressed on a temperature above the AC3 temperature, characterized in that the profiling ( 150 ) a top ( 160 ) and a lower part ( 170 ), wherein the upper part ( 160 ) opposite the lower part ( 170 ) is movable, wherein the sheet steel plate ( 200 ) between upper part ( 160 ) and lower part ( 170 ) and wherein the upper part ( 160 ) and / or the lower part ( 170 ) first zones ( 161 . 171 ) and second zones ( 162 . 172 ), which are temperature-controlled to different temperatures. Heat treatment device ( 100 ) according to claim 1, characterized in that the sheet steel plate ( 200 ) in the clamped state with the upper part ( 160 ) and the lower part ( 170 ) at least partially in contact. Heat treatment device ( 100 ) according to claim 1, characterized in that the sheet steel plate ( 200 ) in the clamped state of the upper part ( 160 ) and the lower part ( 170 ) is spaced. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that the upper part ( 160 ) and / or the lower part ( 170 ) a flat contact surface ( 165 . 175 ) having. Heat treatment device ( 100 ) according to one of claims 1 to 3, characterized in that the upper part ( 160 ) and / or the lower part ( 170 ) a curved in space contact surface ( 165 . 175 ) having. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) is liquid tempered. Heat treatment device ( 100 ) according to one of claims 1 to 5, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) is electrically heated. Heat treatment device ( 100 ) according to claim 7, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) induction heating is. Heat treatment device ( 100 ) according to claim 7, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) Resistant is heatable. Heat treatment device ( 100 ) according to claim 7, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) is gas-heated. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) is tempered in a different way than another of the zones ( 161 . 162 . 171 . 172 ). Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that at least one of the zones ( 161 . 162 . 171 . 172 ) over another of the zones ( 161 . 162 . 171 . 172 ) is thermally isolated. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that the heat treatment device ( 100 ) a handling device ( 300 ) between the production furnace ( 110 ) and the profiling device ( 150 ) is arranged and which is adapted to the sheet steel plate ( 200 ) from the production furnace ( 110 ) in the profiling device ( 150 ) to spend. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that the heat treatment device ( 100 ) several profiling devices ( 150 ) having. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that the profiling device ( 150 ) has a product-specific adapter. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that production furnace ( 110 ) is a continuous furnace. Heat treatment device ( 100 ) according to one of the preceding claims, characterized in that the production furnace ( 110 ) is gas fired. Method of embossing a temperature profile on the sheet steel plate ( 200 ), wherein the sheet steel plate ( 200 ) in a first area ( 210 ) a temperature below the AC3 temperature and a second range ( 220 ) a temperature above the AC3 temperature can be imposed, characterized in that the sheet steel plate ( 200 ) first in a production furnace ( 110 ) is heated to a temperature above the AC3 temperature, the sheet steel plate ( 200 ) then into an upper part ( 160 ) and a lower part ( 170 ) profiling device ( 150 ) is spent where between upper part ( 160 ) and lower part ( 170 ) and the temperature profile is impressed on it. A method according to claim 18, characterized in that the sheet steel plate ( 200 ) the temperature profile is impressed by heat conduction. Method of embossing a temperature profile on the sheet steel plate ( 200 ), wherein the sheet steel plate ( 200 ) in a first area ( 210 ) a temperature below the AC3 temperature and a second range ( 220 ) a temperature above the AC3 temperature can be impressed, characterized in that the sheet steel plate ( 200 ) first in a production furnace ( 110 ) is heated to a temperature below the AC3 temperature, the sheet steel plate ( 200 ) then into an upper part ( 160 ) and a lower part ( 170 ) profiling device ( 150 ) is spent where between upper part ( 160 ) and lower part ( 170 ) and the temperature profile is impressed on it.

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