Induction Heating Coated Metal Cooking Support

Abstract

The present invention relates to a coated metal cookware compatible with induction heating, comprising a heating surface coated with a protective coating and a cooking surface coated with an anti-adhesion coating, forming a cooking surface. According to the invention, the metal body is formed from a double-sided aluminum-coated low-carbon ferromagnetic steel sheet comprising a low-carbon ferromagnetic steel substrate, the low-carbon ferromagnetic steel substrate having an outer layer comprising an aluminum-based matrix on each of its two sides, an intermediate layer comprising an iron / aluminum intermetallic compound disposed between the ferromagnetic low-carbon steel substrate and the outer layer, and the outer layer has a thickness of less than 27 μm, preferably less than 20 μm, and more preferably less than 18 μm, at least at the bottom of the heating surface. The invention also relates to kitchenware, electric cooking appliances, and methods for obtaining a coated metal cookware compatible with induction heating.

Description

[Technical field]

[0001] The present invention relates to the technical field of induction heating compatible metal cooking racks for cooking or reheating food, which can be used with induction heating devices such as induction hobs installed or built into a worktop, or induction heaters built into electric cookware.

[0002] The present invention more specifically relates to coated metal cooking supports that are compatible with induction heating.

[0003] The present invention relates particularly, but not exclusively, to coated metal cooking supports forming cooking vessels.

[0004] The present invention also relates to a cooking utensil comprising a coated metal cooking support associated with at least one gripping element. If desired, the gripping element(s) can be detached or disassembled from the coated metal cooking support.

[0005] The present invention also relates to an electric cooking appliance having a coated metal cooking support associated with an induction heater. [Background technology]

[0006] It is known from US Pat. No. 5,399,633 to make a coated cookware compatible with induction heating, in which a metal plate forming the cooking surface is joined to a ferritic stainless steel plate using an intervening aluminium plate to obtain a metallurgical bond of the different plates.

[0007] The disadvantage of this mold design is that such coated metal cooking vessels have a relatively high cost price, especially due to the presence of stamping operations to obtain the metallurgical assembly of the various plates.

[0008] Another drawback of this design is that such coated metal cooking vessels are relatively heavy due to the presence of the interposed aluminum and ferritic stainless steel plates. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] European Patent No. 2554080 Summary of the Invention [Problem to be solved by the invention]

[0010] Various aspects of the present invention are intended to overcome the shortcomings of the prior art by providing a coated metal cooking surface that is compatible with induction heating and has limited cost. [Means for solving the problem]

[0011] A first aspect of the invention relates to a coated metal cooking support adapted for induction heating, comprising a metal body including a heating surface and a cooking surface, the heating surface having a bottom adapted to rest on an induction heating device, the heating surface carrying a protective coating and the cooking surface carrying an anti-adhesion coating forming a cooking surface, the metal body being formed from a double-sided aluminized low carbon ferromagnetic steel sheet comprising a low carbon ferromagnetic steel substrate, the low carbon ferromagnetic steel substrate having an outer layer comprising an aluminium-based matrix on each of its two sides, an intermediate layer comprising an iron / aluminium intermetallic compound disposed between the ferromagnetic low carbon steel substrate and the outer layer, at least at the bottom of the heating surface, the outer layer having a thickness of less than 27 μm, preferably less than 20 μm, and more preferably less than 18 μm. The low carbon steel used for the ferromagnetic substrate is sensitive to magnetic fields and can be heated by induction. On the other hand, aluminium is an impediment material to the magnetic fields used in induction heating. However, during the aluminization of the steel sheet, an intermetallic reaction layer is formed at the interface between the steel and the aluminium. The intermetallic compounds of the intermediate layer do not have the destructive properties of aluminum to the magnetic fields used in induction heating. Therefore, in aluminum-based coatings used for aluminum cladding, the thickness of the outer layer containing the aluminum-based matrix appears to be the main relevant parameter for obtaining compatibility with induction plates. The use of such a coated metal body provides a coated metal cooktop that is compatible with induction heating and is more economical to produce than a coated metal cooktop that includes an aluminum body combined with a ferromagnetic steel element. The use of such a coated metal body provides a coated metal cooktop that is compatible with induction heating and is lighter than a coated metal cooktop made from cast steel.

[0012] The outer layer may contain Al-Fe-Si needles in an aluminum-silicon matrix. The use of an aluminum coating bath containing aluminum and silicon facilitates the production of the outer layer during the aluminum coating of the steel sheet. Silicon does not have the destructive properties of aluminum to the magnetic fields used in induction heating.

[0013] The low carbon ferromagnetic steel substrate may have a thickness of 0.7 to 3 mm, preferably 1 to 2 mm.

[0014] The low carbon ferromagnetic steel substrate may be made of a steel grade having a maximum of 0.3% by weight carbon, preferably 0.1-0.2% by weight carbon.

[0015] The protective coating can be applied directly to the heating surface of the metal body. The protective coating may consist of one or more layers.

[0016] The anti-adhesion coating can be applied directly to the cooking side of the metal body. The anti-adhesion coating may have one or more layers. If desired, an intermediate coating can be placed between the anti-adhesion coating and the metal body to provide a hard base.

[0017] The protective coating can be a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating.

[0018] According to one embodiment, the protective coating may be a PTFE type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating, and the metal body comprises an aluminum-based deposit having a thickness of less than 30 μm, preferably less than 20 μm, at least on the bottom side of the heating surface.

[0019] According to another embodiment, the protective coating may be an enamel-type coating, the metal body comprising an aluminium-based deposit having a thickness of less than 40 μm, preferably less than 30 μm, at least on the bottom surface of the heating surface.

[0020] The anti-adhesion coating can be a PTFE type coating, or a ceramic type coating, or a sol-gel type coating.

[0021] The coated metal cooking support may have sidewalls that rise around the bottom of the heating surface to form a cooking vessel.

[0022] In particular, the coated metal cooking substrate may have pinched edges, or rolled edges, or open rolled edges, which arrangement allows the ends of the metal body to be hidden from view.

[0023] A second aspect of the present invention relates to a kitchen article including a coated metal cooking support and a grip mounted on the coated metal cooking support, wherein the coated metal cooking support complies with at least one of the characteristics described above.

[0024] A third aspect of the present invention relates to an electric cooking appliance having a coated metal cooking support associated with an induction heater, in that the coated metal cooking support complies with at least one of the aforementioned characteristics.

[0025] A fourth aspect of the invention relates to a method for obtaining a coated metallic cooking medium suitable for induction heating according to at least one of the above characteristics, comprising the following steps: - cutting or providing shapes from double sided aluminium coated low carbon ferromagnetic steel sheet; - stamping into a form to form a metal body including a heating surface and a cooking surface; - providing a protective coating on the heating surface; - Applying a non-stick coating to the cooking surface to form a cooking surface.

[0026] After the shape is drawn and before the protective and anti-adhesive coatings are applied, the process may include a step of treating the peripheral portion of the shape to obtain pinched or rolled edges or open rolled edges.

[0027] The protective coating can be a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating.

[0028] The anti-adhesion coating can be a PTFE type coating, or a ceramic type coating, or a sol-gel type coating.

[0029] A fifth aspect of the invention relates to a method for obtaining a coated metallic cooking medium suitable for induction heating according to at least one of the above characteristics, comprising the following steps: - cutting or providing a shape from a double sided aluminized low carbon ferromagnetic steel sheet including a first side and a second side; - providing a protective coating on a first side and an anti-adhesion coating on a second side to provide a coated shape; - stamping the coated form to form a coated metal body including a heating surface that receives a protective coating and a cooking surface that receives an anti-adhesion coating to form a cooking surface.

[0030] After the protective and anti-adhesion coatings have been applied, and after the coated form has been imaged, the process may include a step of treating the peripheral portion of the coated form to obtain a pinched edge, or a rolled edge, or an open rolled edge.

[0031] The protective coating can be a PTFE type coating or a lacquer type coating.

[0032] The anti-adhesion coating may be a PTFE type coating.

[0033] According to one embodiment, the shape may be disc-shaped, although other shapes are possible. [Brief description of the drawings]

[0034] Other features and attributes of the present invention will become more apparent from the following detailed description of illustrative embodiments and variants thereof, which are illustrated, without limitation, in the accompanying drawings. [Figure 1] 1 shows a partial schematic view of one example embodiment of a metal body used to make a coated metal cooking support according to the present invention. [Diagram 2] 2 shows an enlarged schematic cross-sectional view of the metal body shown in FIG. 1. [Diagram 3] 3 is an enlarged cross-sectional view of a surface portion of the metal body shown in FIG. 2. [Figure 4] 2 shows an enlarged schematic cross-sectional view of the metal body shown in FIG. 1 after a protective coating and an anti-adhesion coating have been applied. [Diagram 5] 2 shows a schematic cross-sectional view of one example of an embodiment of a coated metal cooking support according to the present invention comprising the metal body shown in FIG. 1. [Figure 6] 1 shows a schematic cross-sectional view of a first embodiment of a peripheral portion of a coated metal cooking support of the present invention. [Figure 7] 2 shows a schematic cross-sectional view of a second embodiment of a peripheral portion of a coated metal cooking support of the present invention having a rolled edge. [Figure 8] 1 shows a schematic cross-sectional view of a third embodiment of a peripheral portion of a coated metal cooking support of the present invention having an open rolled edge. [Figure 9] 1A-1D show schematic elevation and vertical cross-sectional views of an exemplary embodiment of a cookware article having a coated metal cooking support according to the present invention. [Figure 10] 1A-1D show schematic elevation and vertical cross-sectional views of an exemplary embodiment of an electric cooking appliance having a coated metal cooking support according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] FIG. 1 illustrates an exemplary embodiment of a metal body 110 used to make the induction heating compatible coated metal cooking support 100 shown in FIG.

[0036] The metal body 110 is made of a low-carbon ferromagnetic steel sheet 101, which is aluminized on both sides. The aluminization of the low-carbon ferromagnetic steel sheet on both sides is achieved by immersion in an aluminium-based aluminizing bath, achieving an aluminium-based deposit 115. The aluminium-based bath may contain silicon, in particular 8% to 13% by weight of silicon, in order to facilitate the deposition on the steel. In particular, AS-type aluminium-silicon alloys can be used, for example AS alloys with 8 to 13% by weight of silicon. However, the use of aluminizing baths with a lower proportion of silicon or without silicon is conceivable. The amount of material deposited on the low-carbon ferromagnetic steel sheet can be evaluated by weighing. The additional mass thus obtained makes it possible to define the thickness of the aluminium-based deposit 115 on the steel sheet. Typically, such an aluminium-based deposit 115 can reach several tens of μm.

[0037] As shown in FIG. 2, the double-sided aluminum-coated low-carbon ferromagnetic steel sheet 101 used to make the induction heating compatible coated metal cooking support 100 includes a low-carbon ferromagnetic steel substrate 111 having an aluminum-based outer layer 112 on each of its two sides.

[0038] The low carbon ferromagnetic steel substrate 111 may have a thickness of 0.7 to 3 mm, in particular a thickness of 1 to 2 mm. The material of the low carbon ferromagnetic steel substrate 111 is selected so as to be compatible with induction heating. The low carbon ferromagnetic steel substrate 111 may be made of a steel grade having a maximum of 0.3% by weight carbon, preferably 0.1 to 0.2% by weight carbon. The ferromagnetic substrate 111 made of low carbon steel may in particular be made of grades DX51 to DX56, which contain 0.12% to 0.18% by weight carbon and a maximum of 0.5% by weight silicon.

[0039] As best seen in Figure 3, the intermediate layer 113 is disposed between the low carbon ferromagnetic steel substrate 111 and the outer layer 112. The intermediate layer 113 is an intermetallic reaction layer that includes iron / aluminum intermetallic compounds, specifically FeAl3 and Fe2Al5. Thus, not all of the aluminum-based deposits 115 made on the sheet steel are found in the outer layer 112. Some of the aluminum-based deposits 115 are in the intermediate layer 113.

[0040] The thickness of this intermediate layer 113 is usually 3-5 μm. However, heat treatment above 500° C. can contribute to increasing the thickness of this intermediate layer 113 and to the detriment of the thickness of the outer layer 112, which can then be subdivided into several sub-layers with different aluminum / iron ratios, these ratios increasing from the ferromagnetic substrate 111 made of low carbon steel towards the outer layer 112.

[0041] The aluminum-based outer layer 112 may include silicon if the aluminum coating bath includes silicon, particularly 8% to 13% silicon by weight. The outer layer 112 may then include Al-Fe-Si needles 114 in an aluminum-silicon matrix 116, as seen in the exemplary embodiment shown in FIG. 4. As shown in FIG. 5, the metal body 110 includes a heating side 120 and a cooking side 130. The heating side 120 has a bottom 122 configured to rest on an induction heating device, including an induction plate or induction heater. As shown in FIG. 4, the heating side 120 has a protective coating 121 and the cooking side 130 has an anti-adhesion coating 131 that forms a cooking surface 132.

[0042] A coated metal cooking support 100 compatible with induction heating according to the present invention shown in Figure 4 includes a metal body 110, a protective coating 121, and an anti-adhesion coating 131. The metal body 110 has a protective coating 121 and an anti-adhesion coating 131.

[0043] The heating side 120 and the cooking surface 130 are formed by a low carbon ferromagnetic steel sheet 101 that is aluminized on both sides. If desired, a protective coating 121 can be applied directly to the heating surface 120 of the metal body 110, in particular to the outer layer 112 on the bottom 122. If necessary, a surface treatment can be performed on the heating surface 120 before the protective coating 121 is applied. In particular, the protective coating 121 can be a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating.

[0044] If desired, the anti-adhesion coating 131 can be made directly on the cooking surface 130 of the metal body 110, in particular on the outer layer 112 facing the bottom 122. If necessary, a surface preparation can be made on the cooking surface 130 before the protective coating 121 is made. In particular, the anti-adhesion coating 131 can be a PTFE type coating, or a ceramic type coating, or a sol-gel type coating. As shown in FIG. 5, the coated metal cooking support 100 can include a side wall 123 that rises around the bottom 122 of the heating surface 120 to form a cooking vessel 124. As a variant, the coated metal cooking support 100 does not necessarily form the cooking vessel 124. In particular, the coated metal cooking support 100 can form a cooking plate.

[0045] Tests with several induction plates have shown that the relevant parameter for achieving compatibility with induction heating on different induction heating devices is the thickness of the outer layer 112 on the bottom 122 of the heating surface 120, and not the thickness of the aluminum-based deposit 115 on the bottom 122 of the heating surface 120. The induction plates used are listed in Table 1.

[0046] [Table 1]

[0047] In fact, these tests show that the limit value for the thickness of the aluminum-based deposit 115 on the bottom 122 of the heated surface 120 to obtain a bond on the induction plate is about 30 μm when the protective coating 121 is a PTFE-type coating, a lacquer-type coating or a ceramic-type coating, or a sol-gel-type coating, but the limit value for the thickness of the aluminum-based deposit 115 on the bottom 122 of the heated surface 120 to obtain a bond on the induction plate is about 40 μm when the protective coating 121 is an enamel-type coating. These tests also showed that a satisfactory coupling was obtained with a thickness of the aluminum-based deposit 115 on the bottom 122 of the heated surface 120 of less than about 20 μm when the protective coating 121 is a PTFE-type coating, or a lacquer-type coating, or a ceramic-type coating, or a sol-gel-type coating, and with a thickness of the aluminum-based deposit 115 on the bottom 122 of the heated surface 120 of less than about 30 μm when the protective coating 121 is an enamel-type coating. The use of enamel-type coatings requires firing temperatures in the range of 550° C. to 600° C. Above 500° C., diffusion phenomena occurring at the steel / aluminum interface favor the formation of iron / aluminum intermetallic compounds, which displace the interface between the intermediate layer 113 and the outer layer 112 and reduce the thickness of the outer layer 112.

[0048] The thickness of the intermediate layer 113 is typically around 3-5 μm, but can be greater if necessary in the form of several sublayers and / or in the reduction of the thickness of the outer layer 112, especially in the case of heat treatments that favor a growth in the thickness of the intermediate layer 113.

[0049] The thickness of the outer layer 112 on the bottom 122 of the heating surface 120 is important for the compatibility of the coated metal cooking support 100 with induction heating. A thickness of less than 27 μm for the outer layer 112 on the bottom 122 of the heating surface 120 is considered a limiting value for achieving bonding on the induction plate. For the outer layer 112 on the bottom 122 of the heating surface 120, a thickness of less than 26 μm provides better results than a thickness of less than 27 μm, a thickness of less than 25 μm provides better results than a thickness of less than 26 μm, a thickness of less than 24 μm provides better results than a thickness of less than 25 μm, a thickness of less than 23 μm provides better results than a thickness of less than 24 μm, a thickness of less than 22 μm provides better results than a thickness of less than 23 μm, a thickness of less than 21 μm provides better results than a thickness of less than 22 μm, a thickness of less than 20 μm provides better results than a thickness of less than 21 μm, a thickness of less than 19 μm provides better results than a thickness of less than 20 μm, a thickness of less than 18 μm provides better results than a thickness of less than 19 μm, and a thickness of less than 17 μm provides better results than a thickness of less than 18 μm. A thickness of less than 20 μm for the outer layer 112 on the bottom 122 of the heating surface 120 allows a fairly satisfactory bond with the induction plate. A thickness of less than 18 μm for the outer layer 112 on the bottom 122 of the heating surface 120 allows a very satisfactory bond with the induction plate. The efficiency (power absorbed by the coated metal cooking support 100 / power emitted by the induction plate) can approach 100%. The heating rate is very fast.

[0050] 5, the induction heating compatible coated metal cooking support 100 has an exposed end 128. The end 128 is generally free of the outer layer 112 by cutting the metal body 110 to create a shape suitable for creating the coated metal cooking support 100. The end 128 may be at least partially covered by a protective coating 121 and / or an anti-adhesion coating 131. Preferably, the exposed end 128 is covered by a protective coating 121 and / or an anti-adhesion coating 131.

[0051] As shown in Figure 6, the induction heating compatible coated metal cooking support 100 can have pinched edges 125. As shown in Figure 7, the induction heating compatible coated metal cooking support 100 may have rolled edges 126. As shown in Figure 8, the induction heating compatible coated metal cooking support 100 can have open rolled edges 127. Thus, ends 128 are not exposed on the top side of the coated metal cooking support 100.

[0052] FIG. 9 shows a cooking article 140 having a coated metal cooking support 100 and a gripping tool 150 mounted on the coated metal cooking support 100. The coated metal cooking support 100 forms the cooking vessel 124 shown in FIG. 5. In the exemplary embodiment shown in FIG. 9, the gripping tool 150 is attached to the cooking vessel 124 by at least one rivet 151. For this purpose, the rivet 151 is mounted in a hole in the side wall 123. If desired, multiple rivets 151 can be used to fasten the gripping tool 150 to the cooking vessel 124. Preferably, two to four rivets 151 are used to fasten the gripping tool 150 to the cooking vessel 124. Alternatively, the gripping tool 150 can be attached to the side wall 123 by welding or screwing to a stud welded to the side wall 123. If desired, additional gripping devices can be attached to the sidewall 123 of the cooking vessel 124 by at least one additional rivet, by welding, or by screwing onto a stud welded to the sidewall 123 .

[0053] FIG. 10 shows an electric cooking appliance 160 having a coated metal cooking support 100 associated with an induction heater 170. The coated metal cooking support 100 forms the cooking vessel 124 shown in FIG. 5. The cooking vessel 124 is placed on a heating base 175 that includes an induction heater 170. The bottom 122 rests on the induction heater 170. Optionally, the cooking vessel 124 may include at least one gripper 155. In the exemplary embodiment shown in FIG. 10, the cooking vessel 124 has two opposing grippers 155. One or each gripper 155 is attached to the cooking vessel 124 by at least one rivet 156. For this purpose, the rivet 156 is attached to a hole in the side wall 123. Optionally, multiple rivets 156 can be used to fasten the gripper 155 to the cooking vessel 124. Preferably, two to four rivets 151 are used to secure the or each gripping fixture 155 to the cooking vessel 124. Alternatively, the or at least one of the gripping fixtures 155 can be attached to the side wall 123 by welding or screwing to a stud welded to the side wall 123.

[0054] The coated metal cookware substrate 100 compatible with induction heating according to the present invention can be obtained by a variety of methods.

[0055] A first method for obtaining a coated metal cooking support 100 that is compatible with induction heating may include the following steps. - cutting or providing shapes from double sided aluminium coated low carbon ferromagnetic steel sheet; - stamping a shape to form a metal body 110 including a heating surface 120 and a cooking surface 130; - forming a protective coating 121 on the heating surface 120; An anti-adhesive coating 131 is applied to cooking surface 130 to form cooking surface 132.

[0056] The shape can in particular be disc-shaped. After drawing the foam and before creating the protective coating 121 and the anti-adhesion coating 131, if desired, the first step is to process the peripheral portion of the foam to obtain a pinched edge 125 or a rolled edge 126 or an open rolled edge 127.

[0057] In this first step, after the forming operation, a protective coating 121 and an anti-adhesion coating 131 are formed. A wide range of coatings can be used. In particular, the protective coating 121 can be a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating. In particular, the anti-adhesion coating 131 can be a PTFE type coating, or a ceramic type coating, or a sol-gel type coating.

[0058] A second method for obtaining a coated metal cooking support 100 that is compatible with induction heating includes the following steps. - cutting or providing a shape from a double sided aluminized low carbon ferromagnetic steel sheet including a first side and a second side; - providing a protective coating 121 on a first side and an anti-adhesion coating 131 on a second side to provide a coated shape; - stamping the coated shape to form a coated metal body 110 comprising a heating surface 120 having a protective coating 121 and a cooking surface 130 having an anti-adhesion coating 131, forming a cooking surface 132.

[0059] The shape may in particular be a disk. After the protective coating 121 and the anti-adhesion coating 131 have been applied and after the coated shape has been imaged, a second step may include processing the peripheral portion of the coated shape to obtain a pinched edge 125, or a rolled edge 126, or an open rolled edge 127.

[0060] In this second step, the protective coating 121 and the anti-adhesion coating 131 are applied before the forming operation. As a result, the range of coatings that can be used is more limited. The protective coating 121 and the anti-adhesion coating 131 should make it possible to form the shape by stamping. The protective coating 121 may be a PTFE-type coating or a lacquer-type coating. The anti-adhesion coating 131 may in particular be a PTFE-type coating.

[0061] The use of double-sided aluminum-coated low carbon ferromagnetic steel sheet 101 to make the coated metal cooking support 100 allows for the use of cheaper raw materials than regular aluminum and stainless steel products. The use of double-sided aluminum-coated low carbon ferromagnetic steel sheet 101 to make the coated metal cooking support 100 also allows for the use of conventional manufacturing processes, limiting the required investment.

[0062] The coated metal cooking supports 100 are lightweight and mechanically very strong. There is no bimetallic effect, so they deform much less during use compared to aluminum or stainless steel cookware. The efficiency (power input / power output of the induction heater) is very high, especially when the aluminum-based deposits 115 are less than 20 μm thick. The heating rate is high: 15 seconds for a 28 cm diameter pan, compared to about 1 minute 30 seconds for a standard aluminum pan of the same diameter with a stainless steel insert for compatibility with induction heating.

[0063] Various modifications and / or improvements apparent to those skilled in the art can be made to the exemplary embodiments of the invention set forth in this description without departing from the scope of the invention as defined by the appended claims.

Claims

1. A coated metal cooking support (100) compatible with induction heating, comprising a metal body (110) including a heating surface (120) and a cooking surface (130), said heating surface (120) having a bottom (122) adapted to rest on an induction heating device, said heating surface (120) carrying a protective coating (121), said cooking surface (130) carrying an anti-adhesion coating (131) forming a cooking surface (132), said metal body (110) being comprised of a double sided aluminium coated substrate (111) comprising a low carbon ferromagnetic steel substrate (111). the low carbon ferromagnetic steel substrate (111) has an outer layer (112) comprising an aluminum-based matrix on each of its two faces, an intermediate layer (113) comprising an iron / aluminum intermetallic compound is disposed between the low carbon ferromagnetic steel substrate (111) and the outer layer (112), and at least at the bottom (122) of the heating surface (120), the outer layer (112) has a thickness of less than 27 μm, preferably less than 20 μm, and more preferably less than 18 μm; The coated metal cookware substrate (100) is compatible with induction heating, wherein the outer layer (112) comprises Al-Fe-Si needles in an aluminum-silicon matrix.

2. The coated metal cooking support (100) compatible with induction heating according to claim 1, characterized in that the low carbon ferromagnetic steel substrate (111) has a thickness of 0.7-3 mm, preferably 1-2 mm.

3. 3. The coated metal cook support (100) compatible with induction heating according to claim 1 or 2, characterized in that the low carbon ferromagnetic steel substrate (111) is made of a steel grade having a maximum of 0.3% by weight carbon, preferably 0.1-0.2% by weight carbon.

4. The coated metal cooking support (100) compatible with induction heating according to any one of claims 1 to 3, characterized in that the protective coating (121) is formed directly on the heating surface (120) of the metal body (110).

5. The coated metal cooking support (100) compatible with induction heating according to any one of claims 1 to 4, characterized in that the protective coating (121) is a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating.

6. 6. The coated metal cooking support (100) compatible with induction heating according to claim 5, characterized in that the protective coating (121) is a PTFE type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating, and the metal body (110) comprises, at least at the bottom (122) of the heating surface (120), an aluminum-based deposit (115) having a thickness of less than 30 μm, preferably less than 20 μm.

7. 6. The coated metal cooking support (100) compatible with induction heating according to claim 5, characterized in that the protective coating (121) is an enamel type coating and the metal body (110) comprises an aluminium-based deposit (115) having a thickness of less than 40 μm, preferably less than 30 μm, at least on the bottom part (122) of the heating surface (120).

8. The coated metal cooking support (100) compatible with induction heating according to any one of claims 1 to 7, characterized in that the anti-adhesion coating (131) is a PTFE type coating, or a ceramic type coating, or a sol-gel type coating.

9. 9. The coated metal cooking support (100) compatible with induction heating according to any one of claims 1 to 8, characterized in that a side wall (123) rises around a bottom (122) of the heating surface (120) to form a cooking vessel (124).

10. 10. The coated metal cooking support (100) compatible with induction heating according to any one of claims 1 to 9, characterized in that it has a pinched edge (125), or a rolled edge (126), or an open rolled edge (127).

11. A cooking article (140) comprising a coated metal cooking support (100) and a gripper (155) mounted on the coated metal cooking support (100), characterized in that the coated metal cooking support (100) is the coated metal cooking support (100) described in any one of claims 1 to 10.

12. An electric cooking appliance (160) having a coated metal cooking support (100) associated with an induction heater (170), characterized in that the coated metal cooking support (100) is a coated metal cooking support (100) according to any one of claims 1 to 10.

13. A method for obtaining a coated metal cooking support (100) suitable for induction heating according to any one of claims 1 to 10, comprising the steps of: - cutting or providing the shape from a low carbon ferromagnetic steel sheet that is aluminized on both sides; - stamping a shape to form said metal body (110) including said heating surface (120) and said cooking surface (130); - providing a protective coating (121) on said heating surface (120); - applying an anti-adhesive coating (131) to said cooking surface (130) to form a cooking surface (132).

14. 14. The method of obtaining an induction heating compatible coated metal cooking support (100) as recited in claim 13, wherein after drawing the shape and before applying the protective coating (121) and the anti-adhesion coating (131), the method includes the step of treating a peripheral portion of the shape to obtain a pinched edge (125) or a rolled edge (126) or an open rolled edge (127).

15. 15. The method for obtaining a coated metal cooking support (100) compatible with induction heating according to claim 13 or claim 14, characterized in that the protective coating (121) is a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating.

16. A method for obtaining a coated metal cooking support (100) compatible with induction heating according to any one of claims 13 to 15, characterized in that the anti-adhesion coating (131) is a PTFE type coating, or a ceramic type coating, or a sol-gel type coating.

17. A method for obtaining a coated metal cooking support (100) suitable for induction heating according to any one of claims 1 to 10, comprising the steps of: - cutting or providing a shape from a double sided aluminized low carbon ferromagnetic steel sheet comprising a first side and a second side; - applying a protective coating (121) to said first side and an anti-adhesion coating (131) to said second side in a coated form; - stamping said coated shape to form a coated metal body (110) comprising a heating surface (120) on which said protective coating (121) is applied, and a cooking surface (130) on which said anti-adhesion coating (131) is applied to form a cooking surface (132).

18. 18. The method for obtaining a coated metal cooking support (100) compatible with induction heating as recited in claim 17, characterized in that after the protective coating (121) and the anti-adhesion coating (131) are applied and after the coated shape is imaged, the method includes a step of treating a peripheral portion of the coated shape to obtain a pinched edge (125), or a rolled edge (126), or an open rolled edge (127).

19. A method for obtaining a coated metal cooking support (100) compatible with induction heating according to claim 17 or 18, characterized in that the protective coating (121) is a PTFE type coating or a lacquer type coating.

20. A method for obtaining a coated metal cooking support (100) compatible with induction heating according to any one of claims 17 to 19, characterized in that said anti-adhesion coating (131) is a PTFE type coating.

21. A method for obtaining a coated metal cooking support (100) compatible with induction heating according to any one of claims 13 to 20, characterized in that said shape is disc-shaped.

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