Container body, its preparation method and cooking appliance

Abstract

The present invention relates to the technical field of cooking appliances, and particularly to a container body, a preparation method thereof, and a cooking appliance. The container body includes: a substrate; and a non-stick layer formed on the surface of the substrate; wherein the non-stick layer includes a high-entropy alloy and a molybdenum-iron alloy. The cooking appliance of the present invention has good long-lasting non-stick property, can improve the long-lasting non-stick life of the cooking appliance, and helps to improve the actual experience of consumers.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking utensils, and in particular, to a container body, a preparation method thereof, and a cooking utensil. Background Art

[0002] In the traditional cookware and household appliance industries, in order to make products have non-stick properties for food, or to facilitate the easy cleaning function of cookware, or to easily achieve the effect of less fumes, a non-stick coating with non-stick properties is usually provided on the surface of the product to obtain a non-stick utensil.

[0003] In the existing non-stick technology, a non-stick material is generally sprayed on the surface of a substrate to obtain a non-stick coating. The existing non-stick materials for cookware mainly include fluorinated coatings, ceramic coatings, and silicone resins. Among them, fluorinated coatings include PTFE (polytetrafluoroethylene), PFOA (ammonium perfluorooctanoate), PFA (copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), FEP (polyperfluoroethylene propylene copolymer), ETFE (ethylene-tetrafluoroethylene copolymer), etc. The non-stick principle is mainly to utilize the extremely low surface free energy of fluorinated polymers. Ceramic coatings are mainly coatings with silicon-oxygen bonds and inorganic silicon as the main components, which achieve a non-stick effect by forming a nanostructure on the surface of the pot body. Silicone resins mainly achieve a non-stick effect by virtue of their low surface energy. Although the existing several non-stick materials have non-stick effects, they also have some disadvantages. For example, fluorinated coatings are not wear-resistant, have poor scratch resistance, may produce harmful substances when decomposed at high temperatures, and the non-stick property will decrease after wear. The non-stick effect of ceramic coatings is worse than that of fluorinated coatings, and the long-term non-stick property is not good. Generally, the coating is easy to fall off after several months of use. The non-stick effect of silicone resins is worse than that of fluorinated coatings. After contacting high temperatures or open flames, the color is easy to turn yellow or gray, and the hardness decreases at high temperatures, and it is easy to produce a "re-sticking" phenomenon.

[0004] In view of this, it is necessary to further improve the non-stick material. Summary of the Invention

[0005] The purpose of the present invention is to overcome or at least partially solve the problems existing in the prior art, and to provide a container body, a preparation method thereof, and a cooking utensil. The non-stick layer of the container body has good long-term non-stick properties and can improve the long-term non-stick life of the cooking utensil.

[0006] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is as follows:

[0007] According to one aspect of the present invention, the present invention provides a container body, including:

[0008] A substrate;

[0009] A non-stick layer formed on the surface of the substrate;

[0010] Among them, the non-stick layer includes a high-entropy alloy and a ferromolybdenum alloy.

[0011] The high-entropy alloy in the non-stick layer endows the container body with non-stick performance. The crystal structure of the high-entropy alloy is composed of atoms of multiple different elements. The atomic radii of these different elements are different. That is, due to the difference in atomic radii of different elements, a lattice distortion effect is caused, increasing the disorder of the microstructure of the material, making the degree of disorder of the alloy microstructure higher, generating an amorphous tendency or structure. This amorphous structure enables the high-entropy alloy to have a lower surface energy relative to ordinary materials, so it can produce a non-stick effect. In addition, in addition to the characteristics of the lattice distortion effect in terms of structure, the high-entropy alloy also has the characteristics of high-entropy effect in thermodynamics, sluggish diffusion effect in kinetics, and cocktail effect in performance. While having non-stick performance, it also has the effects of wear resistance, high hardness, and high-temperature stability, which can further extend the non-stick service life. Moreover, the non-stick layer of the present application also contains a ferromolybdenum alloy. As an amorphous metal additive, when used in combination with the high-entropy alloy, it can play a role in refining the grains, promoting the amorphization of the mixed coating. Introducing the ferromolybdenum alloy as an amorphous component into the non-stick layer can further reduce the surface energy of the high-entropy alloy and further enhance the non-stick performance of the non-stick layer.

[0012] Therefore, through the synergistic cooperation of the high-entropy alloy and the ferromolybdenum alloy, the container body can endow the non-stick layer with good and durable non-stick performance, improving the user experience, alleviating the problem of short non-stick life of existing non-stick materials, and significantly enhancing its durable non-stick life.

[0013] In a possible implementation, the high-entropy alloy satisfies at least one of the following a to c:

[0014] a. The constituent elements of the high-entropy alloy include at least four of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Hf, Ta, W, Pb, Si, and B;

[0015] b. In the high-entropy alloy, the atomic fraction of each constituent element is independently 5% to 35%;

[0016] c. The high-entropy alloy includes at least one of AlCrFeCoNi system, AlCrFeTiNi system, AlCrFeCoNiCu system, FeNiAlCr system, FeCrAlCuNi system, FeCrNiMnAl system, and FeCrCuTiV system.

[0017] Using a high-entropy alloy containing four or more of the above elements, or using a high-entropy alloy of the above several systems, is more conducive to exerting the non-stick performance of the high-entropy alloy and is more suitable for application in the field of non-stick utensils. In addition, in the high-entropy alloy, the addition of Si and B elements can prepare a high-entropy alloy ceramic, which has good wear resistance and high hardness in addition to better non-stick performance.

[0018] In a possible implementation, the constituent elements of the high-entropy alloy include at least one of Ti, Cr, Mo, B, and Al;

[0019] And / or, the constituent elements of the high-entropy alloy further include at least one of Fe, Cu, and V;

[0020] And / or, the high-entropy alloy includes at least two different systems of high-entropy alloys.

[0021] Using a high-entropy alloy containing at least several of Ti, Cr, Mo, B, and Al, and optionally several of Fe, Cu, and V, has good wear resistance while having non-stick performance.

[0022] In a possible implementation, the content of the ferromolybdenum alloy is 10% to 50% of the total mass of the non-stick layer;

[0023] And / or, in the ferromolybdenum alloy, the mass percentage content of molybdenum is 30% to 60%.

[0024] In a possible implementation, the container body satisfies at least one of the following d to g:

[0025] d. The particle size of the high-entropy alloy is 1 μm to 50 μm;

[0026] e. The particle size of the ferromolybdenum alloy is 200 nm to 30 μm;

[0027] f. The thickness of the non-stick layer is 100 μm to 500 μm;

[0028] g. The porosity of the non-stick layer is 0.5% to 5%.

[0029] In this non-stick layer, the mass ratio of the ferromolybdenum alloy should not be higher than 50%, especially in the range of 10% to 50%, while the mass ratio of the high-entropy alloy should not be lower than 50%. This ratio range is set based on the ferromolybdenum alloy as an amorphous metal additive and the high-entropy alloy as the main non-stick material. If the addition ratio of the ferromolybdenum alloy is too high, it will affect the non-stick performance and cause the non-stick effect to deteriorate; if the addition ratio of the ferromolybdenum alloy is too low, there will be too little ferromolybdenum alloy to play a role and the amorphization effect will not be obvious.

[0030] When the mass percentage of molybdenum in the ferromolybdenum alloy is in the range of 30% - 60%, the mass ratio of molybdenum to iron in the ferromolybdenum alloy can be close to 1:1. In this way, after being mixed and melted with the high-entropy alloy, it can increase the degree of disorder of the coating structure, which is more beneficial to obtaining a non-stick layer with excellent and durable non-stick properties.

[0031] The particle sizes of the high-entropy alloy and the ferromolybdenum alloy within the above range are considered based on aspects such as cost and the surface state of the coating. When the particle size of the alloy is too small, it is difficult to prepare powder of such a size, the preparation process is complex, and the cost is high; while when the particle size is too large, the inner surface roughness of the finally obtained container body will be relatively large, the resistance during the frying process will be large, affecting the non-stick effect, and ultimately affecting the consumer experience.

[0032] Within the above range of the non-stick layer thickness, it is possible to avoid the situation where the coating thickness is too thin, resulting in easy wear-through and exposure of the bottom after a period of use; or the situation where the coating thickness is too large, leading to poor bonding strength with the substrate and easy cracking and peeling of the surface coating.

[0033] In a possible implementation, the particle size of the ferromolybdenum alloy ≤ the particle size of the high-entropy alloy;

[0034] And / or, the ferromolybdenum alloy includes first-scale particles and second-scale particles, the particle size of the first-scale particles is 200nm - 500nm, and the particle size of the second-scale particles is 500nm - 1μm.

[0035] By adjusting the proportion of alloy powders of different scales, the porosity of the coating can be adjusted, thereby strengthening the oil absorption characteristics of the coating and further improving the non-stick performance.

[0036] In a possible implementation, the non-stick layer is a thermal spray coating or a cold spray coating;

[0037] And / or, the method of forming the thermal spray coating includes at least one of plasma spraying, supersonic flame spraying, oxyacetylene flame spraying, arc spraying, or explosion spraying.

[0038] According to another aspect of the present invention, the present invention provides a method for manufacturing a container body, including the following steps:

[0039] Provide a substrate;

[0040] On the surface of the substrate, form a non-stick layer by one or more of thermal spraying or cold spraying;

[0041] Wherein, the non-stick layer includes a high-entropy alloy and a ferromolybdenum alloy.

[0042] In a possible implementation, the non-stick layer is formed on the surface of the substrate by using the plasma spraying method in thermal spraying;

[0043] The operating conditions of the plasma spraying satisfy at least one of the following:

[0044] The powder feeding speed is 20 g / min to 40 g / min;

[0045] The spraying distance is 140 mm to 160 mm;

[0046] The voltage is 45 V to 50 V;

[0047] The current is 400 A to 450 A;

[0048] The main gas flow rate is 40 L / min to 70 L / min;

[0049] The plasma gas flow rate is 6 L / min to 10 L / min;

[0050] The multiple spraying method is adopted, and the thickness of each spraying is not less than 0.05 mm.

[0051] According to another aspect of the present invention, the present invention provides a cooking appliance, including the container body as described above or the container body prepared by the preparation method as described above.

[0052] The cooking appliance provided by this application includes this container body, and at least has all the characteristics and advantages of the container body described above, which will not be repeated here. Brief Description of the Drawings

[0053] Figure 1 It is a schematic structural diagram of the container body provided for an exemplary embodiment of this application;

[0054] Figure 2 It is a schematic lattice diagram of the high-entropy alloy provided for an exemplary embodiment of this application.

[0055] Reference Signs:

[0056] 1 - Container body; 10 - Substrate; 20 - Non-stick layer.

[0057] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Detailed Embodiments

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the following will clearly and completely describe the technical solutions of this application in conjunction with the accompanying drawings and embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Based on the technical solutions provided in this application and the given embodiments, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of this application. For those conditions not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer.

[0059] It should be noted that the term "and / or" or " / " used herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In this document, a list of items connected by terms such as "at least one of", "at least one in", "at least one kind in", or other similar terms can mean any combination of the listed items. For example, if items A and B are listed, then the phrase "at least one of A, B" means only A; only B; or A and B.

[0060] In addition, sometimes quantities, ratios, and other numerical values are presented in a range format in this document. It should be understood that such range formats are for convenience and brevity, and should be understood flexibly, including not only the numerical values clearly specified as range limits, but also all individual numerical values or sub-ranges covered within the said range, as if each numerical value and sub-range were clearly specified.

[0061] In this document, the terms "inside" and "outside" are relative position relationships, which are relative to the inside and outside of, for example, Figure 1 the container body shown.

[0062] In some embodiments of this application, a cooking appliance is provided, which includes a container body as described below.

[0063] Specifically, the cooking appliance can be various common cooking devices. Exemplarily, the cooking appliance can be a non-stick pan, a wok, a frying pan, a flat pan, a rice cooker, a pressure cooker, an electric pressure cooker, a griddle, an air fryer, etc. The specific type of the cooking appliance in the embodiments of this application is not limited.

[0064] The cooking appliance includes a container body and can also include a lid, an outer casing, a control circuit, etc. For example, the container body can be the pan body of a non-stick pan, the pan body of a frying pan, the inner pot of a pressure cooker, the inner pot of a rice cooker, etc. The embodiments of this application do not limit other components such as the lid and the outer casing included in the cooking appliance, and they can be various structural types well-known in the art.

[0065] In the embodiments of the present application, by improving the structure or type of the non-stick layer of the container body of the cooking appliance, the non-stick performance of the non-stick layer is better, and it has the characteristics of high temperature resistance and wear resistance. It can endow the container body with long-lasting non-stick property and a long service life, relieve the defect of poor long-lasting non-stick property commonly existing in existing non-stick materials, and help improve the experience of consumers.

[0066] Please refer to the attached Figures 1 to 2 As shown, the embodiments of the present application provide a container body 1, including: a substrate 10, and a non-stick layer 20 formed on the inner surface of the substrate 1; wherein, the non-stick layer 20 includes a high-entropy alloy and a molybdenum-iron alloy.

[0067] A major feature of the container body 1 provided by the embodiments of the present application is that a mixture containing a high-entropy alloy and a molybdenum-iron alloy is used as the non-stick material and applied to the cooking appliance to form a non-stick layer 20 on the inner surface of the substrate 10.

[0068] Specifically, the high-entropy alloy in the above non-stick layer endows the container body with non-stick performance. As Figure 2 shown, the crystal structure of the high-entropy alloy is composed of atoms of various different elements. The atomic radii of these different elements are different. That is, due to the difference in atomic radii of different elements, the lattice distortion effect is caused, increasing the disorder of the microstructure of the material, making the degree of disorder of the alloy microstructure higher, and generating an amorphous trend or structure. This amorphous structure can make the high-entropy alloy have a lower surface energy than ordinary materials, so it can produce a non-stick effect; in addition, in addition to the characteristics of the lattice distortion effect in structure, the high-entropy alloy also has the characteristics of high-entropy effect in thermodynamics, sluggish diffusion effect in kinetics, and cocktail effect in performance. While having non-stick performance, it also has the effects of wear resistance, high hardness and high temperature stability, and thus can extend the non-stick service life. And, the non-stick layer of the present application also contains a molybdenum-iron alloy. As an amorphous metal additive, the molybdenum-iron alloy is used in combination with the high-entropy alloy, which can play a role in refining grains and promoting the amorphization of the mixed coating. Introducing the molybdenum-iron alloy as an amorphous component into the non-stick layer can further reduce the surface energy of the high-entropy alloy and further enhance the non-stick performance of the non-stick layer.

[0069] It can be seen that through the setting of the non-stick layer containing a high-entropy alloy and a molybdenum-iron alloy, through the functional cooperation and support between the high-entropy alloy and the molybdenum-iron alloy, or the mutual restriction and matching of the raw material ratios, the non-stick layer has good long-lasting non-stick performance, and the non-stick layer has good wear resistance and is not easily scratched, improving the user experience. Thus, the embodiments of the present application can relieve the defects of existing non-stick materials such as non-wear resistance, easy scratching and damage, non-high temperature resistance, easy aging and discoloration, especially relieve the problem of short non-stick life of existing non-stick materials, and significantly improve its long-lasting non-stick life.

[0070] The high-entropy alloy is applied to non-stick utensils to achieve a long-lasting non-stick effect for the non-stick utensils. In order to give full play to the role of the high-entropy alloy, for the high-entropy alloy with non-stick properties, the range of element selection needs to be within a suitable range. Specifically, in some embodiments, the constituent elements of the high-entropy alloy include any four or more of Mg (magnesium), Al (aluminum), Sc (scandium), Ti (titanium), V (vanadium), Cr (chromium), Mn (manganese), Fe (iron), Co (cobalt), Ni (nickel), Cu (copper), Zn (zinc), Zr (zirconium), Nb (niobium), Mo (molybdenum), Sn (tin), Hf (hafnium), Ta (tantalum), W (tungsten), Pb, Si (silicon), and B (boron). That is to say, the high-entropy alloy can be a high-entropy alloy of a quaternary system, a quinary system, a hexary system, or a more multi-component system. Exemplarily, the constituent elements of the high-entropy alloy can include Mg, Al, Sc, and Ti, can include Mg, Al, Ti, V, and Cr, can include Mg, Al, Fe, Co, and Ni, can include Al, Ti, V, Cr, Mn, and Fe, can include Al, Ti, Cr, Fe, Co, Ni, and Cu, can include Fe, Co, Ni, W, Sn, and Si, can include Al, Ti, Cr, Ni, Cu, and B, etc. The constituent elements of the high-entropy alloy can be arbitrarily selected from four or more of the above-listed elements, and will not be listed one by one here.

[0071] Using a high-entropy alloy containing the above four or more elements is more conducive to exerting the non-stick properties of the high-entropy alloy. In addition, the addition of Si and B elements can prepare high-entropy alloy ceramics, which have good wear resistance and high hardness in addition to good non-stick properties.

[0072] In order to ensure the multi-principal element characteristics of the high-entropy alloy material in the non-stick layer, the atomic fraction (i.e., atomic percentage content, expressed in % or at.%) of each constituent element in the high-entropy alloy needs to be within a suitable range. Specifically, in some embodiments, in the high-entropy alloy, the atomic fraction of each constituent element is independently 5% to 35%. Exemplarily, the high-entropy alloy is of the AlCrFeCoNi system, and its composition is: Al: 5 to 35 at.%, Cr: 5 to 35 at.%, Fe: 5 to 35 at.%, Co: 5 to 35 at.%, Ni: 5 to 35 at.%. It should be understood that the atomic fractions of the constituent elements of other systems of high-entropy alloys are also within the range of 5% to 35%, and will not be listed one by one here.

[0073] In some embodiments, the high-entropy alloy may be of the AlCrFeCoNi system, may be of the AlCrFeTiNi system, may be of the AlCrFeCoNiCu system, may be of the FeNiAlCr system, may be of the FeCrAlCuNi system, may be of the FeCrNiMnAl system, may be of the FeCrCuTiV system. Typically but not restrictively, the high-entropy alloy may be Fe 25 Mn 35 Cr 10 Cu 10 Ti 10 、Fe 1.8 CrNiMn 2 Al 1.2 、Al 2 Cr 0.5 FeTiNi 0.5 and so on. In addition, in other embodiments, the high-entropy alloy may also be a high-entropy alloy containing at least the above four composition elements and having different component ratios.

[0074] In addition to having good non-stick performance, the non-stick layer in the container body of the embodiments of the present application also needs to have good wear resistance and exhibit relatively high hardness. Therefore, based on the characteristics of the "cocktail effect" of the high-entropy alloy, in some embodiments, the preferred composition elements it contains include at least one of Ti, Cr, Mo, B, and Al; further, the optional composition elements it contains include at least one of Fe, Cu, and V. Thus, by using a high-entropy alloy containing at least several of Ti, Cr, Mo, B, and Al, and optionally several of Fe, Cu, and V, it has good wear resistance while having non-stick performance.

[0075] In some embodiments, the high-entropy alloy contained in the above non-stick layer may be a high-entropy alloy of the same system.

[0076] In other embodiments, according to the characteristic of the low surface energy of the high mixing entropy disordered system, the non-stick layer may also contain a high mixing entropy composed of at least two different systems of high-entropy alloys. That is, the high-entropy alloy includes at least two different systems of high-entropy alloys. By mixing high-entropy alloys with different characteristics to prepare the non-stick layer, a non-stick layer with high strength and corrosion resistance can be obtained. Exemplarily, the high-entropy alloy FeCrAl 1.8 CuNi 2 powder and FeCrCuTiV powder and AlCrFeMnNi powder can be mixed to prepare a non-stick layer with high strength and corrosion resistance.

[0077] According to the embodiments of the present application, the non-stick layer is prepared from a mixed alloy powder composed of high-entropy alloy powder and ferromolybdenum alloy powder. The ferromolybdenum alloy therein is an amorphous metal additive, which can refine grains, promote the amorphization of the mixed coating structure, and enhance the non-stick performance of the coating. Therefore, to ensure the non-stick performance of the non-stick layer, the content of the ferromolybdenum alloy needs to be appropriate. Specifically, in some embodiments, the content of the ferromolybdenum alloy is 10% to 50% of the total mass of the non-stick layer, further can be 15% to 45%, and further can be 20% to 40%; typically but not restrictively, the content of the ferromolybdenum alloy is, for example, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% of the total mass of the non-stick layer, and any value within the range formed by any two of these point values. That is, in the non-stick layer, the mass ratio of the ferromolybdenum alloy should not be higher than 50%, especially within the range of 10% to 50%, while the mass ratio of the high-entropy alloy should not be lower than 50%. This ratio range is set based on the ferromolybdenum alloy as an amorphous metal additive and the high-entropy alloy as the main non-stick material. If the addition ratio of the ferromolybdenum alloy is higher than 50%, there is too much ferromolybdenum alloy and too little high-entropy alloy, which will affect the non-stick performance and result in a poor non-stick effect; if the addition ratio of the ferromolybdenum alloy is lower than 10%, there is too little ferromolybdenum alloy to play a role, and the amorphization effect is not obvious.

[0078] In some embodiments, in the ferromolybdenum alloy, the mass percentage content of molybdenum is 30% to 60%, further can be 35% to 55%, and further can be 40% to 50%; typically but not restrictively, the mass percentage content of molybdenum in the ferromolybdenum alloy is, for example, 30%, 35%, 40%, 45%, 50%, 55%, 60%, and any value within the range formed by any two of these point values. When the content of molybdenum is within this range, the mass ratio of molybdenum to iron in the ferromolybdenum alloy can be close to 1:1. In this way, after being melted and mixed with the high-entropy alloy, it can increase the degree of disorder of the coating structure, which is more beneficial to obtaining a non-stick layer with excellent long-lasting non-stick performance. In this ferromolybdenum alloy, if the content of molybdenum is lower than 30%, the content of molybdenum is too low, which will affect the amorphous effect of the additive; if the content of molybdenum is higher than 60%, the content of molybdenum, as a refractory metal, is too high, which will increase the melting point of the alloy, and a higher temperature is required for the powder to be completely melted, resulting in an increase in process costs.

[0079] In the process of preparing the non-stick layer, the addition methods of the above-mentioned high-entropy alloy and ferromolybdenum alloy can both be in the form of powder. That is, both the high-entropy alloy and the ferromolybdenum alloy can be in powder form. Optionally, the particle size of the high-entropy alloy is in the micron level, and the particle size of the ferromolybdenum alloy is in the micron level or in the nanometer level. By using high-entropy alloy and ferromolybdenum alloy with appropriate particle sizes, the cost can be reduced and the long-lasting non-stick performance can be ensured.

[0080] Specifically, in some embodiments, the particle size of the high-entropy alloy is 1 μm to 50 μm, further it can be 10 to 40 μm, and further it can be 15 to 35 μm; typically but not restrictively, the particle size of the high-entropy alloy can be, for example, 1 μm, 5 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 25 μm, 30 μm, 35 μm, 38 μm, 40 μm, 45 μm, 50 μm, and any value within the range formed by any two of these point values. The particle size of the high-entropy alloy within this range is considered based on aspects such as cost and the surface state of the coating. On the one hand, when the particle size of the high-entropy alloy is less than 1 μm, it is difficult to prepare the powder of this size. Since the powder preparation process is complex due to the too small particle size, the cost is relatively high. On the other hand, when the particle size is greater than 50 μm, it will cause a relatively large surface roughness of the inner surface of the finally obtained container, and a relatively large resistance during the frying process, affecting the non-stick effect and ultimately the consumer's use experience.

[0081] In some embodiments, the particle size of the ferromolybdenum alloy is 200 nm to 30 μm, further it can be 500 nm to 30 μm, and further it can be 1 μm to 30 μm; typically but not restrictively, the particle size of the ferromolybdenum alloy can be, for example, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 800 nm, 900 nm, 1 μm, 5 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 25 μm, 30 μm, and any value within the range formed by any two of these point values. Similarly, the particle size of the ferromolybdenum alloy within this range is also considered based on aspects such as cost and the surface state of the coating. When the particle size of the ferromolybdenum alloy is too small, it is difficult to prepare the powder. Since the too small particle size will make the powder preparation process complex, the cost is relatively high. When the particle size of the ferromolybdenum alloy is too large, it will cause a relatively large surface roughness of the inner surface of the finally obtained container, and a relatively large resistance during the frying process, affecting the non-stick effect and ultimately the consumer's use experience.

[0082] In addition, the particle sizes of the above-mentioned high-entropy alloy and ferromolybdenum alloy also have a certain impact on wear resistance, corrosion resistance, adhesion, etc. For example, considering from aspects such as wear resistance and corrosion resistance, when the addition amounts are the same, the smaller the particle size of the material used, the denser the obtained coating, and the better the wear resistance and corrosion resistance of the coating. However, too small particles will lead to a relatively high cost of powder preparation. If the particle size of the material used is too large, the obtained coating will be relatively rough, and the required process conditions will be more demanding to meet the bonding strength between the film layer and the substrate, and the non-stick property of the coating will also be affected. Therefore, considering comprehensively, the particle size range of the high-entropy alloy is 1 μm to 50 μm, and the particle size range of the ferromolybdenum alloy is 200 nm to 30 μm.

[0083] According to the embodiments of the present application, the particle sizes of the high-entropy alloy and the ferromolybdenum alloy included in the non-stick layer can have a variety of scale ranges. For example, high-entropy alloy powders with different particle size ranges can be mixed, or ferromolybdenum alloy powders with different particle size ranges can be mixed, or high-entropy alloy powders and ferromolybdenum alloy powders with different particle size ranges can be mixed, so as to easily obtain a non-stick layer within the required porosity range.

[0084] By adjusting the proportion of alloy powders of different scales, the porosity of the coating can be adjusted, thereby strengthening the oil absorption characteristics of the coating and further improving the non-stick performance.

[0085] In some embodiments, the particle size of the ferromolybdenum alloy ≤ the particle size of the high-entropy alloy, and further the particle size of the ferromolybdenum alloy is smaller than the particle size of the high-entropy alloy.

[0086] Among them, the particle size range of the high-entropy alloy is 1 μm to 50 μm. The ferromolybdenum alloy includes first-scale particles and second-scale particles, the particle size of the first-scale particles is 200 nm to 500 nm, and the particle size of the second-scale particles is 500 nm to 1 μm; in addition, the ferromolybdenum alloy may further include third-scale particles, and the particle size of the third-scale particles is 1 μm to 30 μm. Preferably, relatively speaking, mixing a ferromolybdenum alloy with a smaller particle size and a high-entropy alloy with a larger particle size is more helpful for improving the non-stick performance.

[0087] In the process of preparing the non-stick layer, the melting degrees of alloy powders of different scales are different during the spraying process. Nanoscale particles will completely melt and fill the gaps between semi-molten micron and submicron particles. Therefore, by adjusting the proportion of powder particles of different scales, different porosities can be generated. Therefore, the non-stick layer preferably includes high-entropy alloys and ferromolybdenum alloys of different scales. By mixing alloy powders of multiple scales, the molten ferromolybdenum alloy with a smaller particle size can uniformly fill between the metallographic phases of the high-entropy alloy, which can promote the formation of amorphous alloy phases and further improve the non-stick effect.

[0088] In some embodiments, the porosity of the non-stick layer is 0.5% to 5%, further it can be 1% to 5%, and further it can be 2% to 4%. Typical but non-limiting porosities can be, for example, 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc. The coating porosity within this range can strengthen the oil absorption characteristics of the coating.

[0089] It should be noted that this porosity is calculated by volume. The porosity of the non-stick layer refers to the ratio of the volume of all pores in the non-stick layer to the total volume of the non-stick layer, and can be expressed as vol.%.

[0090] In addition, a reasonable porosity in the non-stick layer can reduce stress concentration and avoid the generation of coating cracks. If the porosity in the non-stick layer is too large, the bonding strength between the coating and the substrate will decrease, and the strength, hardness, and wear resistance of the coating will decline, resulting in reduced durability of the coating. If the porosity in the non-stick layer is too small, it is difficult to achieve in terms of technology, which will affect the non-stick effect of the coating.

[0091] In some embodiments, the thickness of the non-stick layer is 100μm to 500μm, further preferably 150μm to 400μm, and further preferably 200μm to 300μm. Typically but not restrictively, the thickness of the non-stick layer can be, for example, 100μm, 150μm, 200μm, 300μm, 350μm, 400μm, 450μm, 500μm, and any value within the range formed by any two of these point values.

[0092] Within this thickness range of the non-stick layer, it can not only ensure that the non-stick layer will not fall off or expose the bottom due to wear during long-term use because it is too thin, and has a long-lasting non-stick life, but also ensure that the non-stick layer will not reduce the hardness and adhesion of the coating because it is too thick, avoid reducing the bonding strength between the coating and the substrate, and the surface coating is prone to cracking and peeling.

[0093] In some embodiments, the non-stick layer is a thermal spray coating or a cold spray coating. By means of thermal spraying or cold spraying, a mixed alloy powder composed of high-entropy alloy powder and ferromolybdenum alloy powder is sprayed on the inner surface of the substrate to form a non-stick layer.

[0094] In some embodiments, the method of forming the thermal spray coating includes but is not limited to at least one of plasma spraying, supersonic flame spraying, oxyacetylene flame spraying, arc spraying, or explosion spraying. That is, when the non-stick layer is a thermal spray coating, the thermal spraying method can be plasma spraying, supersonic flame spraying, oxyacetylene flame spraying, arc spraying, explosion spraying, or other similar thermal spraying methods. Additionally, in other embodiments, similar thermal spraying methods can also be used for spraying.

[0095] Exemplarily, when the non-stick layer is a thermal spray coating, plasma spraying is preferably used. This method has a wide application range and is easy to control the roughness.

[0096] In the above container body, the material of the substrate can have various selections, enriching the diversity of the substrate material. For example, the non-stick layer can be attached to common substrate materials in the art such as metals or ceramics. Exemplarily, in some embodiments, the material of the substrate includes aluminum, aluminum alloy, titanium, titanium alloy, iron, stainless steel, and their composite materials. Of course, the material of the substrate is not limited to this, but can also include copper, copper alloy, and even ceramics, graphite, etc. The embodiments of the present application do not limit the material of the substrate, and can be selected according to actual situations.

[0097] Optionally, the material of the substrate may be aluminum, aluminum alloy, or a composite sheet composed of them and a metal. Using a substrate of aluminum / aluminum alloy helps to reduce the weight of the container body and meets the requirements of rapid heating and uniform heat transfer.

[0098] Optionally, the material of the substrate may be stainless steel or a composite sheet of stainless steel and other metals. Using a substrate of stainless steel meets the requirement of good appearance of the outer surface of the pot or other needs, and the cost is relatively low.

[0099] Optionally, the material of the substrate may be titanium, titanium alloy, or a composite sheet composed of them and other metals. Using a substrate of titanium / titanium alloy helps to reduce the weight of the container body, has good corrosion resistance, and is easy to clean.

[0100] In some embodiments, a method for preparing a container body is further provided, including the following steps:

[0101] Provide a substrate;

[0102] On the surface of the substrate, form a non-stick layer by one or more of thermal spraying or cold spraying;

[0103] Wherein, the non-stick layer includes a high-entropy alloy and a ferromolybdenum alloy.

[0104] By mixing high-entropy alloy powder and ferromolybdenum alloy powder and spraying them onto the inner surface of the substrate by means of thermal spraying or cold spraying, etc., a non-stick layer can be formed, which can enhance the non-stick performance of the coating and has good long-term non-stick property.

[0105] In this preparation method, one or several of thermal spraying or cold spraying commonly used in the art are used to form a non-stick layer on the surface of the substrate. The method is simple in operation, easy to implement, and easy to achieve large-scale production. At the same time, the non-stick layer includes a high-entropy alloy and a ferromolybdenum alloy. As described above for the high-entropy alloy and ferromolybdenum alloy, using the mixed alloy powder of the high-entropy alloy and ferromolybdenum alloy provided by the present invention as the non-stick material, the prepared non-stick layer has excellent performance, has characteristics such as long-term non-stick property and long service life.

[0106] In other embodiments, in this preparation method, the formation method of the non-stick layer includes but is not limited to cold spraying and thermal spraying. On the premise of not affecting the use performance of the high-entropy alloy and ferromolybdenum alloy, other coating methods known in the art can also be used.

[0107] It should be understood that in this method for preparing a container body, the specific structure, composition, and beneficial effects of the container body can be referred to the description of the container body above, and will not be elaborated here.

[0108] In some embodiments, the method for forming the non-stick layer includes, but is not limited to, one or more of process methods such as thermal spraying and cold spraying. For example, by means of thermal spraying or cold spraying, a mixed alloy powder composed of high-entropy alloy powder and ferromolybdenum alloy powder is sprayed on the inner surface of the substrate to form a non-stick layer.

[0109] Among them, the thermal spraying method can be a conventional thermal spraying technology in the art, such as one or more of plasma spraying, supersonic flame spraying, oxyacetylene flame spraying, arc spraying, or explosion spraying. Thermal spraying is a technology that uses a certain heat source to heat powdery or filamentous metal or alloy or non-metallic materials to a molten or semi-molten state, and then sprays them onto the surface of the pretreated substrate at a certain speed by means of the flame flow itself or compressed air, etc., and deposits to form a surface coating with various functions. It has the advantages of simple method, easy operation, high feasibility, good reliability, and high production efficiency.

[0110] In some specific embodiments, the thermal spraying method is adopted to form a non-stick layer on the inner surface of the substrate. Further, the plasma spraying method is preferably adopted to form a non-stick layer on the inner surface of the substrate. This method has a wide application range and is easy to control the roughness.

[0111] Specifically, when forming a non-stick layer on the surface of the substrate by the plasma spraying method, the following steps can be specifically included:

[0112] A. Pretreat the surface of the substrate, such as cleaning and surface roughening pretreatment, to enhance the bonding force between the substrate and the non-stick layer.

[0113] B. Load the mixed alloy powder composed of high-entropy alloy powder and ferromolybdenum alloy powder within the above specific particle size range into the powder feeder. The powder feeding speed can be 20 g / min to 40 g / min; typically but not restrictively, the powder feeding speed is, for example, 20 g / min, 22 g / min, 25 g / min, 28 g / min, 30 g / min, 32 g / min, 35 g / min, 38 g / min, 40 g / min, etc.

[0114] C. The spraying distance can be 140 mm to 160 mm; typically but not restrictively, the spraying distance is, for example, 140 mm, 145 mm, 148 mm, 150 mm, 152 mm, 155 mm, 160 mm, etc.

[0115] D. The voltage can be 45 V to 50 V; typically but not restrictively, the voltage is, for example, 45 V, 46 V, 47 V, 48 V, 49 V, 50 V, etc.

[0116] E. The current can be 400 A to 450 A; typically but not restrictively, the current can be, for example, 400 A, 410 A, 420 A, 430 A, 440 A, 450 A, etc.

[0117] F. The main gas flow rate is 40 L / min to 70 L / min; the main gas pressure is 0.5 MPa to 0.9 MPa; typically but not restrictively, the main gas flow rate can be, for example, 40 L / min, 45 L / min, 50 L / min, 55 L / min, 60 L / min, 65 L / min, 70 L / min, etc., and the main gas pressure can be, for example, 0.5 MPa, 0.55 MPa, 0.6 MPa, 0.65 MPa, 0.7 MPa, 0.75 MPa, 0.8 MPa, 0.9 MPa, etc.

[0118] It should be understood that in this plasma spraying process, the main gas can be a main gas commonly used in the art, such as argon.

[0119] G. The plasma gas flow rate is 6 L / min to 10 L / min; the plasma gas pressure is 0.5 MPa to 0.9 MPa; typically but not restrictively, the plasma gas flow rate can be, for example, 6 L / min, 7 L / min, 8 L / min, 9 L / min, 10 L / min, etc., and the plasma gas pressure can be, for example, 0.5 MPa, 0.55 MPa, 0.6 MPa, 0.65 MPa, 0.7 MPa, 0.75 MPa, 0.8 MPa, 0.9 MPa, etc.

[0120] It should be understood that in this plasma spraying process, the plasma gas can be a plasma gas commonly used in the art, such as hydrogen or helium, preferably hydrogen.

[0121] When preparing the non-stick layer, the spraying can be carried out multiple times, and the thickness of each spraying is not less than 0.05 mm. For example, the thickness of each spraying can be 0.05 mm.

[0122] Under the above parameters, the high-pressure plasma flame flow formed at the muzzle heats the powder material to melting, and then deposits it on the surface of the substrate to form a non-stick layer.

[0123] It should be noted that in this plasma spraying process, other operating conditions such as the gun moving speed are not specially restricted. As long as the requirements are met and the performance of the cooking appliance is not affected, those skilled in the art can adjust them according to the actual situation.

[0124] According to an embodiment of the present invention, in order to make the preparation method of the cooking appliance have lower cost, higher production efficiency, better reliability, and better quality and more excellent performance of the prepared coating, the inventor comprehensively considered the operating parameters such as the current, voltage, main gas flow rate, and plasma gas flow rate used in plasma spraying. The inventor found that when the main gas flow rate is 40 L / min to 70 L / min, the plasma gas flow rate is 6 L / min to 10 L / min, the current is 400 A to 450 A, the voltage is 45 V to 50 V, the spraying distance is 140 mm to 160 mm, and the powder feeding speed is 20 g / min to 40 g / min, these parameters affect each other and have a synergistic effect on each other. That is, within the range of the above operating conditions, the method can have high reliability, high production efficiency, low energy consumption, and low cost. The coating material can be sprayed more fully, the quality and performance of the non-stick layer formed are better, and the performance and user experience of the finally obtained cooking appliance product are good.

[0125] The present invention will be further described in detail below with reference to specific embodiments and comparative examples. In the following specific embodiments and comparative examples, unless otherwise specified, the materials used can be obtained commercially.

[0126] Example 1

[0127] A cooking appliance includes a container body, the container body includes a substrate, and a non-stick layer formed on the surface of the substrate. The non-stick layer includes a high-entropy alloy and a ferromolybdenum alloy;

[0128] Among them, the high-entropy alloy is FeCrAl 1.8 CuNi 2 ;

[0129] The content of the ferromolybdenum alloy is 25% of the total mass of the non-stick layer. In the ferromolybdenum alloy, the mass percentage content of molybdenum is 40%;

[0130] The particle size of the high-entropy alloy is 20 μm to 30 μm, and the particle size of the ferromolybdenum alloy is 1 μm to 10 μm;

[0131] The thickness of the non-stick layer is 200 μm.

[0132] Examples 2 - 7

[0133] The main differences between Examples 2 - 7 and Example 1 lie in the type of the high-entropy alloy and the particle size of the high-entropy alloy.

[0134] In Example 2, the high-entropy alloy is Fe 1.8 CrNiMn 2 Al 1.2 ;

[0135] In Example 3, the high-entropy alloy is Al 2 Cr 0.5 FeTiNi0.5 ;

[0136] In Example 4, the high-entropy alloy is FeCrAl 1.8 CuNi 2 and Al 2 Cr 0.5 FeTiNi 0.5 ;

[0137] In Example 5, the high-entropy alloy is FeCrAl 1.8 CuNi 2 , FeCrCuTiV and AlCrFeMnNi;

[0138] In Example 6, the high-entropy alloy is Fe 1.8 CrNiMn 2 Al 1.2 and Al 2 Cr 0.5 FeTiNi 0.5 , wherein the particle size of Fe 1.8 CrNiMn 2 Al 1.2 is 1 μm to 10 μm, and the particle size of Al 2 Cr 0.5 FeTiNi 0.5 is 15 μm to 30 μm;

[0139] In Example 7, the high-entropy alloy is FeCrAl 1.8 CuNi 2 , Fe 25 Mn 35 Cr 10 Cu 10 Ti 10 and Al 2 Cr 0.5 FeTiNi 0.5 wherein the particle size of FeCrAl 1.8 CuNi 2 is 1 μm to 10 μm, the particle size of Fe 25 Mn 35 Cr 10 Cu 10 Ti 10 is 10 μm to 20 μm, and the particle size of Al 2 Cr 0.5 FeTiNi 0.5 is 20 μm to 30 μm;

[0140] The rest are the same as in Example 1.

[0141] Examples 8 - 11

[0142] The main differences between Examples 8-11 and Example 1 lie in the content of ferromolybdenum alloy and the mass percentage of molybdenum in the ferromolybdenum alloy.

[0143] In Example 8, the content of ferromolybdenum alloy is 48% of the total mass of the non-stick layer;

[0144] In Example 9, the content of ferromolybdenum alloy is 10% of the total mass of the non-stick layer;

[0145] In Example 10, the mass percentage of molybdenum in the ferromolybdenum alloy is 30%;

[0146] In Example 11, the mass percentage of molybdenum in the ferromolybdenum alloy is 60%;

[0147] The rest are the same as Example 1.

[0148] Examples 12-14

[0149] The main differences between Examples 12-14 and Example 1 lie in the particle size of the high-entropy alloy and the particle size of the ferromolybdenum alloy.

[0150] In Example 12, the particle size of the high-entropy alloy is 20 μm to 30 μm, and the particle size of the ferromolybdenum alloy is 20 μm to 30 μm;

[0151] In Example 13, the particle size of the high-entropy alloy is 30 μm to 35 μm, and the ferromolybdenum alloy includes first-scale particles and second-scale particles. The particle size of the first-scale particles is 200 nm to 300 nm, and the particle size of the second-scale particles is 500 nm to 600 nm;

[0152] In Example 14, the particle size of the high-entropy alloy is 30 μm to 35 μm, and the ferromolybdenum alloy includes first-scale particles and second-scale particles. The particle size of the first-scale particles is 400 nm to 500 nm, and the particle size of the second-scale particles is 800 nm to 900 nm;

[0153] The rest are the same as Example 1.

[0154] Examples 15-16

[0155] The main differences between Examples 15-16 and Example 1 lie in the thickness of the non-stick layer.

[0156] In Example 15, the thickness of the non-stick layer is 100 μm;

[0157] In Example 16, the thickness of the non-stick layer is 500 μm;

[0158] The rest are the same as Example 1.

[0159] Comparative Example 1

[0160] In this comparative example, the difference from Example 1 is that the non-stick layer in this comparative example uses an existing fluorine-containing coating.

[0161] Comparative Example 2

[0162] In this comparative example, the difference from Example 1 is that the non-stick layer in this comparative example uses an existing ceramic coating.

[0163] Comparative Example 3

[0164] In this comparative example, the difference from Example 1 is that the non-stick layer in this comparative example does not contain a high-entropy alloy.

[0165] Comparative Example 4

[0166] In this comparative example, the difference from Example 1 is that the non-stick layer in this comparative example does not contain ferromolybdenum alloy.

[0167] Performance Test

[0168] The non-stick properties of the non-stick layers in Examples 1 - 16 and Comparative Examples 1 - 4 applied to cooking utensils were respectively tested, and an accelerated simulation test method was used to test and evaluate their non-stick life. The test results are shown in Table 1.

[0169] The specific test method is as follows.

[0170] Referring to the accelerated simulation test procedure for non-stick frying pans, the non-stick life was evaluated, and the test process is as follows:

[0171] A: Vibration wear resistance test → B: Dry burning of mixed sauce → C: Boiling brine → D: Stir-frying quartz stone (with an iron spatula) → E: Frying eggs to evaluate the non-stick grade. Completing the above 5 test steps and one non-stick grade evaluation marks the end of one cycle.

[0172] Among them, A: Vibration wear resistance test, specifically including: The instrument used is a vibration wear resistance tester, and the method used is: 1) Put 1 Kg of quartz stone (particle size 9 - 12 mm) into the pot; 2) Place the pot on the heating furnace; 3) Set the vibration time of the instrument to 15 minutes, the heating temperature to 150 - 180 °C, and the rotation speed to 300 revolutions per minute; 4) Turn on the vibration button to make the quartz stone vibrate in the pot for 15 minutes; 5) After the test, pour out the quartz stone in the pot, clean the inner surface of the pot with dishwashing liquid, and dry it. 6) Quartz stone replacement cycle: 1 time / month.

[0173] B: Dry-burning mixed sauce, specifically including: The ingredients include soy sauce, vinegar, cooking wine, monosodium glutamate, salt, sugar, and cooking oil. The method steps are as follows: 1) Prepare a mixed sauce according to the following weight ratio: soy sauce: vinegar: cooking wine: monosodium glutamate: salt: sugar: cooking oil = 4:3:2:1:1:2:2 (mass ratio). After completely dissolving and mixing evenly, a special mixed sauce is prepared; 2) Take 50 g of the mixed sauce and put it into the pot, and shake the pot until the sauce evenly covers the bottom of the pot; 3) Place the sample pot on the gas stove and dry-burn it to 250 °C - 270 °C, then keep it warm for 2 minutes and stop heating; 4) Rinse it with water, and then use dishwashing liquid and a dishcloth to scrub the contaminated area in the pot clean.

[0174] C: Boiling brine, specifically including: The ingredients include 50 g of table salt and 950 g of water. The method used is: 1) Weigh 50 g of table salt and 950 g of water, prepare 5% brine and pour it into the pot; 2) Start timing after boiling the water, and keep it slightly boiling for 10 minutes. During this period, add water according to the situation to keep the concentration unchanged; 3) After boiling for the specified time, use tap water to clean the pot and dry it.

[0175] D: Stir-frying quartz stones (iron spatula), specifically including: The ingredients include 1 kg of quartz stones with a particle size of 9 - 12 mm, a little oil, vinegar, cooking wine, soy sauce, and salt. The method used is: 1) Pour 15 g of cooking oil into the pot, shake it evenly until the entire inner surface is impregnated, heat it until there is cooking fume, then pour 1 kg of quartz stones into the pot, add a small amount of vinegar, cooking wine, soy sauce, water, and salt, and stir-fry evenly for 10 minutes; 2) After finishing, use dishwashing liquid to clean the inner surface of the pot and dry it; 3) Filter the soup stock after each cycle and leave the quartz stones for use in the next cycle; 4) Quartz stone replacement cycle: once a month.

[0176] During the accelerated simulation test, the non-stick life is judged after each cycle. One of the following phenomena can be used to judge the end point:

[0177] (1) Decrease in non-stickiness:

[0178] The non-stick grade for frying eggs is continuously III for two cycles;

[0179] (2) Appearance damage:

[0180] The coating shows a fuzzing phenomenon;

[0181] The diameter of the coating peeling area is greater than 3 mm;

[0182] Obvious wear exposes the substrate;

[0183] The coating has more than 3 piercing scratches (exposing the substrate);

[0184] There is dirt that cannot be washed off with a wet dishcloth;

[0185] The number of simulated test cycles recorded until the test reaches the end point is regarded as the non-stick life of the product. The more the number of cycles, the longer the non-stick life of the coating.

[0186] Table 1 Performance test results of each example and comparative example

[0187]

[0188]

[0189] It can be seen from the data in Table 1 that when the non-stick materials containing high-entropy alloy and ferromolybdenum alloy provided in Examples 1-16 of the present application are applied to cooking utensils, the accelerated simulation cycle times of the cooking utensils can reach 18-27 times. Compared with the cycle times of the existing fluorine-containing coatings or ceramic coatings in Comparative Example 1 or 2, which are only 6 times or 8 times, the cycle times are greatly improved, indicating that the non-stick life of the non-stick materials of the present application is longer, and the non-stick materials provided by the present application can alleviate the problem of poor long-term non-stick performance of the existing non-stick materials.

[0190] By comparing Examples 1-16 with Comparative Examples 3 and 4, it can be seen that compared with using only high-entropy alloy or ferromolybdenum alloy alone as the non-stick material, when high-entropy alloy and ferromolybdenum alloy are used in combination, the cycle times can be greatly improved; thus, it shows that through the synergistic cooperation of high-entropy alloy and ferromolybdenum alloy, the cooking utensils can have better long-term non-stick performance.

[0191] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A container body, characterized in that, it comprises: a substrate; using a mixture containing a high-entropy alloy and a ferromolybdenum alloy as a non-stick material to form a non-stick layer on the surface of the substrate; wherein, the non-stick layer comprises a high-entropy alloy and a ferromolybdenum alloy.

2. The container body according to claim 1, characterized in that, the high-entropy alloy satisfies at least one of the following a to c: a. The constituent elements of the high-entropy alloy include at least four of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Hf, Ta, W, Pb, Si, and B; b. In the high-entropy alloy, the atomic fraction of each constituent element is independently 5% to 35%; c. The high-entropy alloy includes at least one of the AlCrFeCoNi system, the AlCrFeTiNi system, the AlCrFeCoNiCu system, the FeNiAlCr system, the FeCrAlCuNi system, the FeCrNiMnAl system, and the FeCrCuTiV system.

3. The container body according to claim 2, characterized in that, the constituent elements of the high-entropy alloy include at least one of Ti, Cr, Mo, B, and Al; and / or, the constituent elements of the high-entropy alloy further include at least one of Fe, Cu, and V; and / or, the high-entropy alloy includes at least two different systems of high-entropy alloys.

4. The container body according to claim 1, characterized in that, the content of the ferromolybdenum alloy is 10% to 50% of the total mass of the non-stick layer; and / or, in the ferromolybdenum alloy, the mass percentage content of molybdenum is 30% to 60%.

5. The container body according to claim 1, characterized in that, the container body satisfies at least one of the following d to g: d. The particle size of the high-entropy alloy is 1 μm to 50 μm; e. The particle size of the ferromolybdenum alloy is 200 nm to 30 μm; f. The thickness of the non-stick layer is 100 μm to 500 μm; g. The porosity of the non-stick layer is 0.5% to 5%.

6. The container body according to claim 5, characterized in that, the particle size of the ferromolybdenum alloy ≤ the particle size of the high-entropy alloy; and / or, the ferromolybdenum alloy includes first-scale particles and second-scale particles, the particle size of the first-scale particles is 200 nm to 500 nm, and the particle size of the second-scale particles is 500 nm to 1 μm.

7. The container body according to any one of claims 1-6, characterized in that, the non-stick layer is a thermal spray coating or a cold spray coating; and / or, the method of forming the thermal spray coating includes at least one of plasma spraying, supersonic flame spraying, oxyacetylene flame spraying, arc spraying, or explosion spraying.

8. A method for preparing a container body, characterized in that, it includes the following steps: providing a substrate; mixing high-entropy alloy powder and ferromolybdenum alloy powder, and spraying them onto the surface of the substrate by one or more of thermal spraying or cold spraying to form a non-stick layer; wherein, the non-stick layer comprises a high-entropy alloy and a ferromolybdenum alloy.

9. The method for preparing a container body according to claim 8, characterized in that, The non-stick layer is formed on the surface of the substrate by using plasma spraying in thermal spraying method; The operating conditions of the plasma spraying satisfy at least one of the following: The powder feeding speed is 20 g / min to 40 g / min; The spraying distance is 140 mm to 160 mm; The voltage is 45 V to 50 V; The current is 400 A to 450 A; The main gas flow rate is 40 L / min to 70 L / min; The plasma gas flow rate is 6 L / min to 10 L / min; The multi-spraying method is adopted, and the thickness of each spraying is not less than 0.05 mm.

10. A cooking appliance, characterized in that, it includes the container body according to any one of claims 1-7 or the container body prepared by the preparation method according to any one of claims 8-9.

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