Composite cookware and composite cookware processing method

Abstract

The present invention provides a composite cookware and a processing method of the composite cookware. The composite cookware includes a composite cookware body and an isolation groove. The composite cookware body includes a superimposed substrate layer and a heat-conducting layer, and a bonding layer is formed at the connection between the substrate layer and the heat-conducting layer. The isolation groove is recessed from the pot mouth end of the composite cookware body to the inside of the composite cookware body, so as to at least make the end surface of the bonding layer lower than the pot mouth end surface of the composite cookware body. By arranging the isolation groove at the pot mouth to make the height of the bonding layer lower, on the one hand, the bonding layer at the pot mouth can be reduced to reduce heat concentration, and on the other hand, due to the isolation groove, the outside air can flow here to take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. It can also improve the anti-rust treatment effect at the pot mouth, thereby improving the anti-rust performance of the composite cookware, extending the service life of the composite cookware, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen utensils, and in particular to a composite cookware and a processing method of the composite cookware. Background Art

[0002] In the related art, fine iron cookware is usually made of a single layer of iron or steel plate, which has the advantage of being light, and then nitrided for rust prevention. However, this type of fine iron pan currently has the following problems: due to its thin material, it has poor thermal performance and is very easy to generate oil smoke during use. The composite fine iron pan made of iron-aluminum composite material solves the above problem well, but the composite fine iron pan still has the technical problem of poor rust prevention during use, which affects the product life. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] One aspect of the present invention provides a composite cookware.

[0005] Another aspect of the present invention provides a method for processing a composite cookware.

[0006] In view of this, according to one aspect of the present invention, a composite cookware is provided, comprising a composite cookware body and an isolation groove. The composite cookware body comprises a base layer and a heat-conducting layer which are stacked, and a bonding layer is formed at the connection between the base layer and the heat-conducting layer. The isolation groove is recessed from the pot mouth end of the composite cookware body toward the inside of the composite cookware body, so that at least the end surface of the bonding layer is lower than the end surface of the pot mouth of the composite cookware body.

[0007] The composite cookware provided in the embodiment of the present invention comprises a composite cookware body and an isolation groove. The composite cookware body comprises a superimposed substrate layer and a heat-conducting layer, which can improve the performance of the single substrate layer. The substrate layer and the heat-conducting layer diffuse and combine with each other during the process of combining into a composite plate, and a bonding layer will be formed at the connection. The bonding layer has a certain thermal resistance, which affects the efficiency of heat transfer and easily causes heat concentration on the substrate layer or the heat-conducting layer with faster heat conduction. If the user touches the pot mouth with higher heat, it is easy to be scalded. By setting an isolation groove at the pot mouth to make the height of the bonding layer lower, on the one hand, the bonding layer at the pot mouth can be reduced, and the heat concentration can be reduced. On the other hand, due to the isolation groove, the outside air can flow here, take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. Specifically, the isolation groove is used to at least make the end face of the bonding layer lower, that is, the width of the isolation groove can be further widened, so that the end face of part of the structure of the base layer or the heat-conducting layer is also lower, that is, when the isolation groove is formed, the base layer or the heat-conducting layer at the pot mouth end can be further removed on the premise of removing the bonding layer at the pot mouth end. Since the thickness of the bonding layer is often thin, if the isolation groove is processed by laser etching or other processes, the etching width needs to be strictly controlled, and the processing accuracy is required to be high. By appropriately widening the width of the isolation groove, the processing accuracy can be reduced, thereby reducing the processing difficulty and improving the processing efficiency. In addition, in order to improve the rust-proof performance of the composite pot, the composite pot body can be treated with rust-proof treatment. Taking the base layer as an iron layer and the heat-conducting layer as an aluminum layer as an example, a nitriding rust-proof layer can be formed on the surface of the iron layer by nitriding treatment, but there are interlayer compounds at the bonding interface of the iron layer and the aluminum layer. During the nitriding process, the interlayer compounds cannot combine with nitrogen atoms to form a nitriding rust-proof layer. Therefore, the rust-proof performance of these positions is poor, which will cause rust at the pot mouth position during use. By reducing the bonding layer at the pot mouth, the anti-rust treatment effect at the pot mouth can be improved, thereby improving the anti-rust performance of the composite cookware, extending the service life of the composite cookware, and improving the user experience.

[0008] In addition, the composite cookware provided according to the above technical solution of the present invention also has the following additional technical features:

[0009] In one possible design, the bonding layer is an atomic diffusion layer between the substrate layer and the thermally conductive layer.

[0010] In this design, the composite pot body is specifically made of composite materials, that is, atoms in the base layer and the heat-conducting layer diffuse and bond with each other at the contact position to form a composite layer, which can improve the bonding strength between the base layer and the heat-conducting layer.

[0011] In a possible design, the bonding layer at the pot mouth end of the composite pot body is removed to form an isolation groove.

[0012] In this design, it is specifically defined that in order to form an isolation groove, what is removed at the pot mouth end of the composite pot body is the bonding layer, that is, the base layer and the heat-conducting layer are not removed, and the base layer and the heat-conducting layer remain unchanged, so that during the use of the composite pot body, the isolation groove does not affect the use function of the base layer and the heat-conducting layer, thereby ensuring the structural stability of the composite pot body, reducing heat concentration and improving the anti-rust performance.

[0013] In a possible design, the inner side surface of the isolation groove is an uneven surface.

[0014] In this design, the inner side of the isolation groove is specifically set to an uneven surface. On the one hand, it will not affect the flow of air, and can ensure that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, the uneven surface can increase the resistance of corrosive liquids and water vapor in the external environment to enter the isolation groove, reduce the probability of contact between the bonding layer at the bottom of the isolation groove and the corrosive substance, and thus improve the corrosion resistance of the bonding layer. Specifically, the bonding layer at the pot mouth can be dissolved by an alkaline solution to form an isolation groove. The isolation groove processed by this process itself has an uneven inner side, which can be easily processed.

[0015] In a possible design, the isolation groove includes an annular isolation groove.

[0016] In this design, the isolation groove can be annular or square to ensure that the entire bonding layer is located within the isolation groove at the pot mouth end, thereby reducing the heat concentration at the pot mouth and allowing the outside air to flow in the isolation groove to take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth and helps to improve the rust resistance of the composite cookware. The isolation groove can be adjusted accordingly according to the shape of the composite pot body, as long as it is continuously distributed along the composite pot mouth and connected end to end to form a closed ring.

[0017] In a possible design, a ratio of the depth of the isolation trench to the width of the isolation trench is greater than or equal to 60 and less than or equal to 1000.

[0018] In this design, as a design scheme of an isolation groove of the present invention, the isolation groove width refers to the distance from the base layer to the heat-conducting layer at the end of the pot mouth of the composite pot body where the isolation groove is located. The isolation groove depth is the distance from the end of the pot mouth of the composite pot to the bonding layer. By limiting the lower limit of the ratio of the depth and width of the isolation groove, it is possible to ensure that a narrow isolation groove structure is formed. On the one hand, the air flow rate in the isolation groove can be increased, which is convenient for taking away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, it can make it difficult for corrosive liquids and water vapor in the external environment to contact the bonding layer through the inside of the narrow isolation groove. Therefore, in the area corresponding to the isolation groove, the bonding layer with poor rust resistance can be isolated from the external environment, thereby improving the rust resistance of the composite pot at the pot mouth. By limiting the upper limit of the ratio of the depth and width of the isolation groove, the depth of the isolation groove can be appropriately controlled while ensuring that the depth of the isolation groove meets the requirements of air flow and anti-corrosion performance, which helps to reduce structural damage to the composite pot body and can reduce processing difficulty.

[0019] In a possible design, the width of the isolation groove is greater than or equal to 0.5 μm and less than or equal to 40 μm; and / or the depth of the isolation groove is greater than or equal to 0.1 mm and less than or equal to 1.2 mm.

[0020] In this design, the value ranges of the width and thickness of the isolation groove are specifically defined. As a design scheme of the isolation groove of the present invention, the width of the isolation groove refers to the distance from the base layer to the heat-conducting layer at the end of the pot mouth of the composite pot body. The depth of the isolation groove refers to the distance from the inward depression of the pot mouth end of the composite pot to the bonding layer.

[0021] Specifically, the value range of the width of the isolation groove is greater than or equal to 0.5μm and less than or equal to 40μm. The upper limit value can ensure that the composite pot body has sufficient structural strength and ensure product quality. The lower limit value can ensure that there is no bonding layer at the pot mouth of the composite pot body, which helps to reduce the risk of scalding at the pot mouth and improve the rust resistance of the composite pot at the pot mouth. Specifically, when the isolation groove is formed by dissolving the bonding layer at the pot mouth with an alkaline solution, the processing parameters can be controlled during the processing of the composite pot body to control the thickness of the bonding layer, thereby controlling the width of the isolation groove.

[0022] Specifically, the range of the depth of the isolation groove is greater than or equal to 0.1 mm and less than or equal to 1.2 mm. This, combined with the range of the width of the isolation groove, can ensure the formation of a narrow isolation groove structure. On the one hand, it can increase the flow rate of air in the isolation groove, making it easier to take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, it can make it difficult for corrosive liquids and water vapor in the external environment to pass through the narrow isolation groove and contact the bonding layer. Therefore, in the area corresponding to the isolation groove, the bonding layer with poor anti-rust performance can be isolated from the external environment, thereby improving the anti-rust ability of the composite cookware at the pot mouth. The upper limit value can ensure that the composite pot body has sufficient structural strength and ensure product quality. The lower limit value can ensure the formation of a reliable narrow structure.

[0023] In a possible design, the width of the open end of the isolation trench is greater than the width of the bottom wall of the isolation trench.

[0024] In this design, the width of the isolation groove gradually decreases when it extends along the bottom of the pot body at the pot mouth end, so that the width of the isolation groove opening end is greater than the width of the isolation groove bottom wall, which is convenient for processing. At the same time, the larger width of the opening end can increase the flow rate of air in the isolation groove, which is convenient for taking away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. At the same time, it can better perform anti-rust treatment, thereby improving the anti-rust performance of the pot mouth end of the composite pot body, extending the service life of the composite pot, and improving the user experience.

[0025] In a possible design, the composite pot body further includes: an anti-rust layer, which covers the exposed surface of the base layer.

[0026] In this design, the base layer is subjected to anti-rust treatment to form an anti-rust layer on the exposed surface of the base layer, thereby improving the anti-rust ability of the base layer and extending the service life of the composite cookware.

[0027] In a possible design, the anti-rust layer constitutes at least a portion of the side wall of the isolation groove.

[0028] In this design, the isolation groove is located in the space sandwiched by the base layer and the heat-conducting layer at the port of the composite cookware. The anti-rust layer is formed by rust-proofing the base layer, so that the base layer with anti-rust function on one side of the isolation groove constitutes the side wall of the isolation groove, so that the isolation groove has anti-rust ability, thereby improving the anti-rust ability of the port of the composite cookware and extending the service life of the composite cookware.

[0029] In a possible design, the anti-rust layer includes a nitriding anti-rust layer.

[0030] In this design, the base layer of the composite pot body is treated with rust prevention, which can be done by nitriding. Through the nitriding process, a nitriding rust prevention layer is generated on the surface of the base layer, thereby having good anti-corrosion performance, reducing the risk of rusting during the use of the pot, extending the service life of the pot, and improving the use experience. It can be understood that since the nitriding rust prevention layer is formed by changing the surface structure of the base layer, and is not a newly added layer structure, it will not affect the shape of the isolation groove.

[0031] In a possible design, the number of the heat conducting layer is at least one.

[0032] In this design, the number of heat-conducting layers is at least one to ensure that the heat-conducting performance of the composite cookware is enhanced. The number of heat-conducting layers may also be more than one, and different heat-conducting layers may be superimposed on each other to achieve different heat-conducting performance enhancement effects and meet the heat-conducting requirements of different application scenarios.

[0033] In a possible design, the number of the base layer is one.

[0034] In this design, a base layer can be provided separately to meet basic cooking needs.

[0035] In a possible design, the number of the base layers is two, and the heat conducting layer is located between the two base layers.

[0036] In this design, in addition to the basic base layer, a base layer can be added on the outside of the heat conductive layer to play a magnetic conductive role, so that the composite cookware can be used for heating by electromagnetic heating equipment such as induction cookers, which helps to broaden the application range of the composite cookware and meet the different cooking needs of users.

[0037] It can be understood that by selecting different numbers of base layers and heat-conducting layers, a composite layer structure with more than two layers can be achieved, thereby improving the performance of the single base layer and thus improving the performance of the composite cookware.

[0038] In one possible design, the base layer includes a refined iron layer; and / or the thermal conductive layer includes one or a combination of the following: an aluminum layer, a copper layer; and / or the bonding layer includes one or a combination of the following: an iron-aluminum atomic diffusion layer, an iron-copper atomic diffusion layer.

[0039] In this design, the material of the composite pot body is specifically defined. The base layer can be a fine iron layer, and accordingly, the composite cookware provided in the embodiment of the present invention is an improvement on the fine iron pot in the related art. The heat-conducting layer can be an aluminum layer, or a copper layer, and can also include superimposed aluminum layers and copper layers at the same time, such as an aluminum-copper-aluminum three-layer structure, that is, the composite pot body can be made of an iron-aluminum composite plate, or an iron-copper composite plate, or an iron-aluminum-copper composite plate, all of which can improve the performance of the fine iron pot. Correspondingly, the bonding layer can be an iron-aluminum atomic diffusion layer, or an iron-copper atomic diffusion layer, to form a composite structure, which helps to improve the bonding strength between the base layer and the heat-conducting layer.

[0040] According to another aspect of the present invention, a processing method for a composite cookware is provided, comprising: performing a molding process on a composite plate to obtain a composite pot body, the composite pot body comprising a base layer and a heat-conducting layer which are stacked, a bonding layer being formed at the connection between the base layer and the heat-conducting layer; placing at least the pot mouth end of the composite pot body in a solution / atmosphere that can chemically react with the bonding layer to dissolve the bonding layer at the pot mouth end of the composite pot body to form an isolation groove.

[0041] The processing method of the composite cookware provided in the embodiment of the present invention uses a composite plate to make a composite pot body including a base layer and a heat-conducting layer, which can improve the performance of the single base layer. The base layer and the heat-conducting layer diffuse and combine with each other during the processing process of combining into a composite plate, and a bonding layer will be formed at the connection. The bonding layer has a certain thermal resistance, which affects the efficiency of heat transfer and easily causes heat concentration on the base layer or the heat-conducting layer with faster heat conduction. If the user touches the pot mouth with higher heat, it is easy to be scalded. By processing an isolation groove at the pot mouth to dissolve the bonding layer at the pot mouth end, the height of the bonding layer is lowered. On the one hand, the bonding layer at the pot mouth can be reduced to reduce the heat concentration. On the other hand, due to the isolation groove, the outside air can flow here and take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. By placing at least the pot mouth end of the composite pot body in a solution / atmosphere that can chemically react with the bonding layer, and processing the isolation groove by dissolving the bonding layer at the pot mouth end, it can be ensured that the bonding layer at the pot mouth end is effectively removed, and the original base layer and heat conductive layer will not be damaged, which is easy to operate and has high reliability. At the same time, when the isolation groove is processed by this process, the inner side of the isolation groove will form an uneven surface. On the one hand, it will not affect the flow of air, and can ensure that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, the uneven surface can increase the resistance of corrosive liquids and water vapor in the external environment to enter the isolation groove, reduce the probability of the bonding layer at the bottom of the isolation groove contacting with corrosive substances, and thus improve the anti-corrosion performance of the bonding layer. In addition, in order to improve the anti-rust performance of the composite cookware, the composite pot body can be further treated with anti-rust. Taking the case where the base layer is an iron layer and the heat-conducting layer is an aluminum layer, a nitriding anti-rust layer can be formed on the surface of the iron layer through nitriding treatment. However, there are interlayer compounds at the interface between the iron layer and the aluminum layer. During the nitriding process, the interlayer compounds cannot combine with nitrogen atoms to form a nitriding anti-rust layer. Therefore, the anti-rust performance of these locations is poor, which will cause rust at the pot mouth during use. By reducing the bonding layer at the pot mouth, the anti-rust treatment effect at the pot mouth can be improved, thereby improving the anti-rust performance of the composite cookware, extending the service life of the composite cookware, and improving the user experience.

[0042] In a possible design, at least the pot mouth end of the composite pot body is placed in a solution / atmosphere that can chemically react with the bonding layer, specifically including: performing liquid nitriding treatment on the composite pot body using an alkaline solution.

[0043] In this design, the step of processing the isolation groove is specifically defined as liquid nitriding treatment. Since the cyanide salt used in the liquid nitriding treatment is an alkaline substance, when the composite pot body is subjected to liquid nitriding treatment, an isolation groove can be formed, and a nitriding anti-rust layer can be formed on the surface of the substrate layer at the same time, so that two processes can be realized in the same process, achieving the technical effect of simplifying the process and reducing the manufacturing cost.

[0044] In a possible design, the treatment temperature of the liquid nitriding treatment is greater than or equal to 540° C. and less than or equal to 580° C.

[0045] In this design, the liquid nitriding treatment is specifically limited to a temperature range of 540°C to 580°C, which can not only ensure that a dense and sufficiently thick nitriding layer is generated on the surface of the base layer after the liquid nitriding treatment, but also avoid delamination defects of the base layer and the thermal conductive layer due to excessively high nitriding temperature, which helps to improve the comprehensive performance of the composite cookware and extend the service life of the composite cookware.

[0046] In a possible design, the treatment time of the liquid nitriding treatment is greater than or equal to 5 hours and less than or equal to 12 hours.

[0047] In this design, the treatment time of liquid nitriding treatment is specifically limited to 5 hours to 12 hours. This lower limit value can ensure that a nitriding anti-rust layer of sufficient thickness and density is generated on the surface of the substrate layer, thereby improving the anti-rust performance of the composite cookware. This upper limit value helps to control manufacturing costs, improve product competitiveness, and reduce production waste. And by controlling the appropriate nitriding time, the anti-rust performance of the composite cookware can be guaranteed. In addition, the longer the liquid nitriding time, the deeper the isolation groove, and the better the anti-rust effect, but if the depth of the isolation groove exceeds a certain range, it will affect the structural strength of the pot mouth end of the composite cookware; the shorter the liquid nitriding time, the shallower the isolation groove, the higher the structural strength, but the anti-rust effect is poor. Therefore, the depth of the isolation groove can be controlled within a reasonable range by controlling the duration of liquid nitriding, which not only ensures the structural strength of the pot mouth end of the composite cookware, but also has good anti-rust performance.

[0048] Additional aspects and advantages according to the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0050] Figure 1 A schematic diagram showing the pot body forming structure of a composite cookware according to an embodiment of the present invention is shown;

[0051] Figure 2 A schematic diagram of the structure of a composite cookware before the pot is formed according to an embodiment of the present invention is shown;

[0052] Figure 3 An embodiment of the present invention is shown Figure 2 A partial enlarged view of part B;

[0053] Figure 4An embodiment of the present invention is shown Figure 1 A partial enlarged view of part C;

[0054] Figure 5 A micrograph of a composite cookware at the pot mouth end of an embodiment of the present invention is shown;

[0055] Figure 6 A micrograph of a base layer at the pot end of an embodiment of the present invention is shown;

[0056] Figure 7 A schematic flow chart showing a method for processing a composite cookware according to an embodiment of the present invention is shown.

[0057] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0058] 100 composite cookware, 110 composite cookware body, 112 base layer, 114 heat conducting layer, 116 bonding layer, 118 anti-rust layer, 120 isolation groove. DETAILED DESCRIPTION

[0059] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0061] Refer to the following Figures 1 to 6 The composite cookware provided according to some embodiments of the present invention is described below.

[0062] like Figure 1 As shown, an embodiment of one aspect of the present invention provides a composite cooker 100, comprising a composite cooker body 110 and an isolation groove 120. Figure 3 As shown, the composite pot body 110 includes a base layer 112 and a heat-conducting layer 114 which are stacked, and a bonding layer 116 is formed at the connection between the base layer 112 and the heat-conducting layer 114. The isolation groove 120 is recessed from the pot mouth end of the composite pot body 110 to the inside of the composite pot body 110, so that at least the end surface of the bonding layer 116 is lower than the end surface of the pot mouth of the composite pot body 110.

[0063] The composite cookware 100 provided in the embodiment of the present invention comprises a composite cookware body 110 and an isolation groove 120. The composite cookware body 110 comprises a superimposed base layer 112 and a heat-conducting layer 114, which can improve the performance of the single base layer 112. The base layer 112 and the heat-conducting layer 114 diffuse and combine with each other during the process of combining into a composite plate, and a bonding layer 116 is formed at the connection. The bonding layer 116 has a certain thermal resistance, which affects the efficiency of heat transfer and easily forms heat concentration on the base layer 112 or the heat-conducting layer 114 with faster heat conduction. If the user touches the pot mouth with higher heat, it is easy to be scalded. By setting the isolation groove 120 at the pot mouth, the height of the bonding layer 116 is lowered. On the one hand, the bonding layer 116 at the pot mouth can be reduced, and the heat concentration can be reduced. On the other hand, due to the isolation groove 120, the outside air can flow here, take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. Specifically, the isolation groove 120 is used to at least make the end face of the bonding layer 116 lower, that is, the width of the isolation groove 120 can be further widened, so that the end face of part of the structure of the base layer 112 or the heat-conducting layer 114 is also lower, that is, when the isolation groove 120 is formed, the base layer 112 or the heat-conducting layer 114 at the pot mouth end can be further removed on the premise of removing the bonding layer 116 at the pot mouth end. Since the thickness of the bonding layer 116 is often thin, if the isolation groove 120 is processed by laser etching or other processes, the etching width needs to be strictly controlled, and the processing accuracy is required to be high. By appropriately widening the width of the isolation groove 120, the processing accuracy can be reduced, thereby reducing the processing difficulty and improving the processing efficiency. In addition, in order to improve the rust-proof performance of the composite cookware 100, the composite pot body 110 can be rust-proofed. For example, if the base layer 112 is an iron layer and the heat conductive layer 114 is an aluminum layer, a nitriding anti-rust layer 118 can be formed on the surface of the iron layer through nitriding treatment. However, there are interlayer compounds at the bonding interface between the iron layer and the aluminum layer. During the nitriding process, the interlayer compounds cannot combine with nitrogen atoms to form the nitriding anti-rust layer 118. Therefore, the anti-rust performance of these locations is poor, which will cause rust at the pot mouth during use. By reducing the bonding layer 116 at the pot mouth, the anti-rust treatment effect at the pot mouth can be improved, thereby improving the anti-rust performance of the composite cookware 100, extending the service life of the composite cookware 100, and improving the user experience. Figure 5 In the micrograph shown, the dark part on the upper side is the heat-conducting layer, and the light part on the lower side is the substrate layer. There is a thin bonding layer at the interface between the two. Figure 6 As can be seen from the micrograph shown, a continuous and dense anti-rust layer is generated at the interface where the thermal conductive layer and the substrate layer are combined.

[0064] Specifically, the bonding layer 116 is an atomic diffusion layer formed by mutual diffusion and bonding of atoms of the base layer 112 and the heat conducting layer 114 during complex processes such as rolling compounding and diffusion annealing. At the same time, the higher the annealing temperature, the thicker the bonding layer 116. As the thickness of the bonding layer 116 increases, the composite pot body 110 becomes brittle, resulting in poor structural strength. Therefore, by controlling the appropriate annealing temperature, a bonding layer 116 of appropriate thickness can be generated.

[0065] Furthermore, if Figure 1 and Figure 4 As shown, the bonding layer 116 at the pot mouth end of the composite pot body 110 is removed to form the isolation groove 120. That is to say, in order to form the isolation groove 120, what is removed at the pot mouth end of the composite pot body 110 is the bonding layer 116, that is, the base layer 112 and the heat-conducting layer 114 are not removed, and the base layer 112 and the heat-conducting layer 114 remain unchanged, so that during the use of the composite pot body 110, the isolation groove 120 does not affect the use function of the base layer 112 and the heat-conducting layer 114, so that the composite pot body 110 reduces heat concentration and improves the rust-proof performance under the premise of ensuring structural stability.

[0066] Specifically, the setting of the isolation groove 120 is adjusted accordingly according to different types of pot bodies.

[0067] Furthermore, in the case where the handle of the composite cookware 100 covers the pot mouth end of the composite pot body 110, the bonding layer 116 is not exposed in the area corresponding to the handle, so there is no need to set the isolation groove 120, which saves the process flow and reduces the product cost.

[0068] Furthermore, in the case where the handle of the composite cookware 100 does not cover the pot mouth of the composite pot body 110, the bonding layer 116 is exposed in the area corresponding to the handle. At this time, it is necessary to connect the end to end along the pot mouth of the composite pot body 110 to form a closed isolation groove 120, that is, an annular isolation groove.

[0069] The process flow corresponding to the above embodiment includes: pot body forming→pot mouth cutting→setting isolation groove 120→rust prevention treatment.

[0070] Specifically, Figure 2 As shown, the composite pot body 110 is generally formed by a composite plate formed by stacking an iron plate and an aluminum plate, and is prepared into a pot shape by die stretching, spinning or hydraulic drawing. The end face of the pot mouth end of the composite pot body 110 is the cross section of the composite plate. It can be understood that after the pot shape is prepared, the pot mouth can be further bent to form a flange. At this time, the end face of the flange is the end face of the pot mouth end. The direction of the end face changes with the bending, and is not necessarily the same as the direction of the pot mouth of the composite pot body 110. This is also an implementation method of the present invention.

[0071] Specifically, the formed composite pot body 110 is then subjected to processes such as mold trimming or special machine edge turning to remove excess material at the pot mouth. At the same time, the bonding layer 116 can be exposed on the cross section of the pot mouth to prepare for the next step of setting the isolation groove 120.

[0072] Furthermore, the bonding layer 116 is dissolved by an alkaline solution, thereby forming a concave isolation groove 120 at the pot mouth end. When processing the composite plate, the thickness of the bonding layer 116 can be controlled by controlling the processing parameters (such as diffusion annealing temperature), thereby controlling the width of the isolation groove 120. The isolation groove 120 can also be processed by other methods, such as laser etching, metal etching, etc.

[0073] Specifically, the inner side surface of the isolation groove 120 is an uneven surface. On the one hand, it does not affect the flow of air, can ensure that the temperature at the pot mouth is not too high, and helps to reduce the risk of scalding at the pot mouth. On the other hand, the uneven surface can increase the resistance of corrosive liquids and water vapor in the external environment to enter the isolation groove 120, reduce the probability of the bonding layer 116 at the bottom of the isolation groove 120 contacting with corrosive substances, and thus improve the anti-corrosion performance of the bonding layer 116. Specifically, the bonding layer 116 at the pot mouth can be dissolved by an alkaline solution to form the isolation groove 120. The isolation groove 120 processed by this process itself has an uneven inner side surface, which can be easily processed.

[0074] As a design scheme of the isolation groove 120 of the present invention, the width of the isolation groove 120 refers to the distance from the base layer 112 to the heat-conducting layer 114 at the end of the pot mouth of the composite pot body 110. The depth of the isolation groove 120 is the distance from the inward depression of the pot mouth end of the composite pot 100 to the bonding layer 116.

[0075] In some embodiments, the ratio of the depth of the isolation groove 120 to the width of the isolation groove 120 is greater than or equal to 60 and less than or equal to 1000. By limiting the lower limit of the ratio of the depth and width of the isolation groove 120, it is possible to ensure that a narrow and long isolation groove 120 structure is formed. On the one hand, the flow rate of air in the isolation groove 120 can be increased, which is convenient for taking away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, it can make it difficult for corrosive liquids and water vapor in the external environment to pass through the narrow and long isolation groove 120 and contact the bonding layer 116. Therefore, in the area corresponding to the isolation groove 120, the bonding layer 116 with poor anti-rust performance can be isolated from the external environment, thereby improving the anti-rust ability of the composite cookware 100 at the pot mouth end. By limiting the upper limit of the ratio of the depth and width of the isolation groove 120, the depth of the isolation groove 120 can be appropriately controlled while ensuring that the depth of the isolation groove 120 meets the requirements of air flow and anti-corrosion performance, which helps to reduce structural damage to the composite pot body 110 and can reduce the difficulty of processing.

[0076] In some embodiments, Figure 4 As shown, the width A of the isolation trench 120 is greater than or equal to 0.5 μm and less than or equal to 40 μm; and / or the depth L of the isolation trench 120 is greater than or equal to 0.1 mm and less than or equal to 1.2 mm.

[0077] Specifically, the width A of the isolation groove 120 has a value range of 0.5μm≤A≤40μm. The upper limit value can ensure that the composite pot body 110 has sufficient structural strength and ensures product quality. The lower limit value can ensure that there is no bonding layer 116 at the pot mouth of the composite pot body 110, which helps to reduce the risk of scalding at the pot mouth and improve the rust resistance of the composite pot 100 at the pot mouth end. Specifically, when the isolation groove 120 is formed by dissolving the bonding layer 116 at the pot mouth with an alkaline solution, the processing parameters can be controlled during the processing of the composite pot body 110 to control the thickness of the bonding layer 116, thereby controlling the width A of the isolation groove 120.

[0078] Furthermore, the width A of the isolation groove 120 may be 1 μm, 10 μm, 25 μm, etc., and may be specifically set according to the use characteristics and purpose of the composite cookware 100 .

[0079] Specifically, the depth L of the isolation groove 120 has a value range of 0.1 mm ≤ L ≤ 1.2 mm. This, combined with the value range of the width A of the isolation groove 120, can ensure the formation of a narrow and long isolation groove 120 structure. On the one hand, the air flow rate in the isolation groove 120 can be increased to facilitate the removal of heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, it can make it difficult for corrosive liquids and water vapor in the external environment to pass through the narrow and long isolation groove 120 and contact the bonding layer 116. Therefore, in the area corresponding to the isolation groove 120, the bonding layer 116 with poor anti-rust performance can be isolated from the external environment, thereby improving the anti-rust ability of the composite cookware 100 at the pot mouth end. The upper limit value can ensure that the composite pot body 110 has sufficient structural strength and ensures product quality. The lower limit value can ensure the formation of a reliable narrow and long structure.

[0080] Furthermore, the depth L of the isolation groove 120 may be 0.2 mm, 0.6 mm, 1 mm, etc., and may be specifically set according to the usage characteristics and purpose of the composite cookware 100 .

[0081] In some embodiments, Figure 4 As shown, the width of the open end of the isolation trench 120 is greater than the width of the bottom wall of the isolation trench 120 .

[0082] Furthermore, when the isolation groove 120 is located at the pot mouth and extends along the bottom of the pot body, the width gradually decreases, so that the width of the open end of the isolation groove 120 is greater than the width of the bottom wall of the isolation groove 120, thereby facilitating processing. At the same time, the larger width of the open end can increase the flow rate of air in the isolation groove 120, making it easier to take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. At the same time, it can better perform anti-rust treatment, thereby improving the anti-rust performance of the pot mouth end of the composite pot body 110, extending the service life of the composite pot 100, and improving the user experience.

[0083] Furthermore, the width of the open end of the isolation groove 120 may also be equal to the width of the bottom wall of the isolation groove 120 , and may be adjusted accordingly according to different uses of the composite pot body 110 .

[0084] In some embodiments, Figure 1 As shown, the composite pot body 110 further includes an anti-rust layer 118 , which covers the exposed surface of the base layer 112 .

[0085] Furthermore, by performing an anti-rust treatment on the base layer 112 , an anti-rust layer 118 is formed on the exposed surface of the base layer 112 , thereby improving the anti-rust ability of the base layer 112 , reducing the possibility of the composite cookware 100 being rusted, and extending the service life of the composite cookware 100 .

[0086] In some embodiments, Figure 4 As shown, the anti-rust layer 118 constitutes at least a portion of the sidewall of the isolation groove 120 .

[0087] The isolation groove 120 is located in the space sandwiched by the base layer 112 and the heat-conducting layer 114 at the port of the composite cookware. The base layer 112 is subjected to anti-rust treatment to form an anti-rust layer 118, so that the base layer 112 with anti-rust function on one side of the isolation groove 120 constitutes the side wall of the isolation layer 120, so that the isolation groove 120 has anti-rust ability, thereby improving the anti-rust ability of the port of the composite cookware 100 and extending the service life of the composite cookware 100.

[0088] Specifically, the anti-rust layer 118 includes a nitriding anti-rust layer. The base layer 112 of the composite pot body 110 is subjected to an anti-rust treatment, and the anti-rust treatment can be performed by liquid nitriding. Through the nitriding process, a nitriding anti-rust layer is generated on the surface of the base layer 112, so that it has good anti-corrosion performance, can reduce the risk of rusting of the pot during use, extend the service life of the pot, and improve the use experience. It can be understood that since the nitriding anti-rust layer is formed by changing the surface structure of the base layer 112, and is not a newly added layer structure, it will not affect the shape of the isolation groove 120.

[0089] Furthermore, in actual use, the defective position is prone to rust, thereby shortening the service life of the product. Therefore, before nitriding treatment, the pot body needs to be sanded and cleaned to remove defects such as iron filings, impurities, scratches or bruises on the surface of the pot body, otherwise a continuous and dense nitriding layer cannot be generated at the defective position. For composite plate materials, nitriding treatment is carried out within a temperature range of 540°C to 580°C, which can ensure that a dense and sufficiently thick nitriding layer is generated on the surface of the substrate layer 112 after nitriding treatment. Furthermore, since the cyanide salt used in liquid nitriding is an alkaline substance, liquid nitriding can also be used to form the isolation groove 120. The advantage is that while the isolation groove 120 is formed, the anti-rust layer 118 can also be formed on the surface of the substrate layer 112, and two processes are realized in the same process, achieving the technical effect of simplifying the process and reducing manufacturing costs.

[0090] Specifically, the surface of the base layer 112 inside the isolation groove 120 is subjected to anti-rust treatment, so that the base layer 112 has good anti-rust performance. Even if a small amount of corrosive liquid and water vapor enters the isolation groove 120 during use, the base layer 112 will not rust, thereby improving the anti-rust performance of the pot mouth.

[0091] Specifically, during the liquid nitriding process, the isolation groove 120 causes part of the base layer 112 and the heat-conducting layer 114 at the pot mouth end of the composite cookware 100 to separate, thereby forming a new exposed surface of the base layer 112 at the pot mouth end. During the liquid nitriding process, the new exposed layer of the base layer 112 will form a nitriding anti-rust layer, so that the base layer 112 located at the pot mouth end has better anti-rust performance. After the nitriding treatment, the bonding layer 116 is located within the isolation groove 120, so it is not easy to contact corrosive substances in the external environment, and the anti-rust performance is improved.

[0092] Furthermore, compared with ordinary nitriding, liquid nitriding can ensure that the bonding layer combines with nitrogen atoms to generate a dense anti-rust layer 118, thereby achieving a better anti-rust effect.

[0093] Furthermore, the nitriding time is 5 to 12 hours; if the nitriding time is less than 5 hours, the anti-rust layer 118 of sufficient thickness and density cannot be generated on the surface of the iron layer, which will make the pot rust-proof performance poor; if the nitriding time is more than 12 hours, the manufacturing cost will increase, the competitiveness of the product will be reduced, and production waste will be caused. By controlling the appropriate nitriding time, the anti-rust performance of the composite pot 100 is guaranteed.

[0094] In addition, the longer the liquid nitriding time is, the deeper the isolation groove 120 is, and the better the anti-rust effect is. However, if the depth of the isolation groove 120 exceeds a certain range, it will affect the structural strength of the pot mouth end of the composite cookware 100; the shorter the liquid nitriding time is, the shorter the isolation groove 120 is, the higher the structural strength is, but the anti-rust effect is poor. Therefore, the depth of the isolation groove 120 can be controlled within a reasonable range by controlling the liquid nitriding time, which not only ensures the structural strength of the pot mouth end of the composite cookware 100, but also has good anti-rust performance.

[0095] Specifically, by reasonably selecting the width and depth of the isolation groove 120, the rationality of the nitriding process parameters is taken into account, and the isolation groove 120 can be made into a long and narrow shape, making it difficult for corrosive liquids and water vapor in the external environment to enter the interior through the long and narrow isolation groove 120 and contact the bonding layer 116.

[0096] Furthermore, other nitriding processes, such as gas nitriding, ion nitriding, etc., may also be used.

[0097] Specifically, gas nitriding or ion nitriding is used for rust prevention. Since the bonding layer 116 cannot react with the nitrogen or ammonia used for nitriding during the gas nitriding or ion nitriding process, it is necessary to partially dissolve the bonding layer 116 through pretreatment before the gas nitriding or ion nitriding, and then perform the nitriding treatment.

[0098] In some embodiments, the number of the heat-conducting layer 114 is at least one to ensure that the heat-conducting performance of the composite cookware 100 is enhanced. The number of the heat-conducting layer 114 may also be more than one, and different heat-conducting layers 114 may be superimposed on each other to achieve different heat-conducting performance enhancement effects and meet the heat-conducting requirements of different application scenarios.

[0099] Specifically, the number of the base layer 112 is one, that is, a single base layer 112 may be provided to meet basic cooking needs.

[0100] Specifically, there are two base layers 112, and the heat-conducting layer 114 is located between the two base layers 112. That is, in addition to the basic base layer 112, an additional base layer 112 can be provided on the outside of the heat-conducting layer 114 to play a magnetic conductive role, so that the composite cookware 100 can be used for heating by electromagnetic heating equipment such as induction cookers, which helps to broaden the application scope of the composite cookware 100 and meet the different cooking needs of users.

[0101] It is understandable that by selecting different numbers of base layers 112 and heat-conducting layers 114 , a composite layer structure with more than two layers can be achieved, thereby improving the performance of the single base layer 112 and thus improving the performance of the composite cookware 100 .

[0102] In some embodiments, Figure 1As shown, the base layer 112 includes a refined iron layer; and / or the thermal conductive layer 114 includes one or a combination of the following: an aluminum layer, a copper layer; and / or the bonding layer 116 includes one or a combination of the following: an iron-aluminum atomic diffusion layer, an iron-copper atomic diffusion layer.

[0103] Further, the material of the composite pot body 110 is specifically defined. The base layer 112 can be a fine iron layer, and accordingly, the composite pot 100 provided in the embodiment of the present invention is an improvement on the fine iron pot in the related art. The heat-conducting layer 114 can be an aluminum layer, or a copper layer, and can also include a superimposed aluminum layer and a copper layer at the same time, such as an aluminum-copper-aluminum three-layer structure, that is, the composite pot body 110 can be made of an iron-aluminum composite plate, or an iron-copper composite plate, or an iron-aluminum-copper composite plate, which can improve the performance of the fine iron pot, and at the same time, can prevent the aluminum layer or the copper layer from being corroded by the nitriding medium or other corrosive substances in use, which helps to improve the performance of the fine iron pot and improve the corrosion resistance of the composite pot 100. Correspondingly, the bonding layer 116 can be an iron-aluminum atomic diffusion layer, or an iron-copper atomic diffusion layer, to form a composite structure, which helps to improve the bonding strength between the base layer 112 and the heat-conducting layer 114.

[0104] Another embodiment of the present invention provides a method for processing a composite cookware.

[0105] Figure 7 FIG. 1 is a schematic flow chart showing a method for processing a composite cookware according to an embodiment of the present invention. Figure 7 As shown, the processing method of the composite cookware includes:

[0106] S102, forming the composite plate to obtain a composite pot body, wherein the composite pot body comprises a base layer and a heat-conducting layer which are stacked, and a bonding layer is formed at the connection between the base layer and the heat-conducting layer;

[0107] S104, placing at least the pot mouth end of the composite pot body in a solution / atmosphere that can chemically react with the bonding layer to dissolve the bonding layer at the pot mouth end of the composite pot body to form an isolation groove.

[0108] The processing method of the composite cookware provided in the embodiment of the present invention uses a composite plate to make a composite pot body including a base layer and a heat-conducting layer, which can improve the performance of the single base layer. The base layer and the heat-conducting layer diffuse and combine with each other during the processing process of combining into a composite plate, and a bonding layer will be formed at the connection. The bonding layer has a certain thermal resistance, which affects the efficiency of heat transfer and easily causes heat concentration on the base layer or the heat-conducting layer with faster heat conduction. If the user touches the pot mouth with higher heat, it is easy to be scalded. By processing an isolation groove at the pot mouth to dissolve the bonding layer at the pot mouth end, the height of the bonding layer is lowered. On the one hand, the bonding layer at the pot mouth can be reduced to reduce the heat concentration. On the other hand, due to the isolation groove, the outside air can flow here and take away the heat there, so that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. By placing at least the pot mouth end of the composite pot body in a solution / atmosphere that can chemically react with the bonding layer, and processing the isolation groove by dissolving the bonding layer at the pot mouth end, it can be ensured that the bonding layer at the pot mouth end is effectively removed, and the original base layer and heat conductive layer will not be damaged, which is easy to operate and has high reliability. At the same time, when the isolation groove is processed by this process, the inner side of the isolation groove will form an uneven surface. On the one hand, it will not affect the flow of air, and can ensure that the temperature at the pot mouth is not too high, which helps to reduce the risk of scalding at the pot mouth. On the other hand, the uneven surface can increase the resistance of corrosive liquids and water vapor in the external environment to enter the isolation groove, reduce the probability of the bonding layer at the bottom of the isolation groove contacting with corrosive substances, and thus improve the anti-corrosion performance of the bonding layer. In addition, in order to improve the anti-rust performance of the composite cookware, the composite pot body can be further treated with anti-rust. Taking the case where the base layer is an iron layer and the heat-conducting layer is an aluminum layer, a nitriding anti-rust layer can be formed on the surface of the iron layer through nitriding treatment. However, there are interlayer compounds at the interface between the iron layer and the aluminum layer. During the nitriding process, the interlayer compounds cannot combine with nitrogen atoms to form a nitriding anti-rust layer. Therefore, the anti-rust performance of these locations is poor, which will cause rust at the pot mouth during use. By reducing the bonding layer at the pot mouth, the anti-rust treatment effect at the pot mouth can be improved, thereby improving the anti-rust performance of the composite cookware, extending the service life of the composite cookware, and improving the user experience.

[0109] Specifically, the bonding layer is an atomic diffusion layer formed by the mutual diffusion and bonding of atoms of the base layer and the heat-conducting layer during complex processes such as rolling, compounding, and diffusion annealing. At the same time, the higher the annealing temperature, the thicker the bonding layer. As the thickness of the bonding layer increases, the composite pot body becomes brittle, resulting in poor structural strength. Therefore, controlling the appropriate annealing temperature can generate a bonding layer of appropriate thickness, thereby controlling the width of the isolation groove.

[0110] Specifically, the composite pot body is generally made of a composite plate formed by stacking an iron plate and an aluminum plate, and is prepared into a pot shape through a process such as mold stretching, spinning or hydraulic drawing. The end face of the pot mouth end of the composite pot body is the cross section of the composite plate. It is understandable that after the pot shape is prepared, the pot mouth can be further bent to form a flange. At this time, the end face of the flange is the end face of the pot mouth end. The direction of the end face changes with the bending, and is not necessarily the same as the direction of the pot mouth of the composite pot body. This is also an implementation method of the present invention.

[0111] Specifically, the formed composite pot body is then subjected to processes such as mold trimming or special machine edge turning to remove excess material at the pot mouth. At the same time, the bonding layer can be exposed on the cross section of the pot mouth to prepare for the next step of setting the isolation groove.

[0112] Specifically, in S104, at least the pot mouth end of the composite pot body is placed in a solution / atmosphere that can chemically react with the bonding layer, specifically including: using an alkaline solution to perform liquid nitriding treatment on the composite pot body. Since the cyanide salt used in the liquid nitriding treatment is an alkaline substance, when the composite pot body is subjected to liquid nitriding treatment, an isolation groove can be formed, and a nitriding anti-rust layer can be formed on the surface of the base layer at the same time, so that two processes can be implemented in the same process, achieving the technical effect of simplifying the process and reducing the manufacturing cost.

[0113] Specifically, the treatment temperature of the liquid nitriding treatment is greater than or equal to 540° C. and less than or equal to 580° C. This can ensure that a dense and sufficiently thick nitriding layer is generated on the surface of the base layer after the liquid nitriding treatment, and can also avoid delamination defects of the base layer and the heat-conducting layer due to excessively high nitriding temperature, which helps to improve the comprehensive performance of the composite cookware and extend the service life of the composite cookware.

[0114] Specifically, the treatment time of the liquid nitriding treatment is greater than or equal to 5 hours and less than or equal to 12 hours. The lower limit value can ensure that a nitriding anti-rust layer of sufficient thickness and density is generated on the surface of the substrate layer, thereby improving the anti-rust performance of the composite cookware. The upper limit value helps to control manufacturing costs, improve product competitiveness, and reduce production waste. And by controlling the appropriate nitriding time, the anti-rust performance of the composite cookware can be guaranteed. In addition, the longer the liquid nitriding time, the deeper the isolation groove, the better the anti-rust effect, but the depth of the isolation groove exceeds a certain range, which will affect the structural strength of the composite cookware pot mouth end; the shorter the liquid nitriding time, the shallower the isolation groove, the higher the structural strength, but the anti-rust effect is poor. Therefore, the depth of the isolation groove can be controlled within a reasonable range by controlling the duration of the liquid nitriding, which not only ensures the structural strength of the composite cookware pot mouth end, but also has good anti-rust performance.

[0115] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0116] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0117] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite cookware, characterized in that: The composite cookware comprises: A composite pot body, the composite pot body comprising a base layer and a heat-conducting layer which are stacked, a bonding layer being formed at the connection between the base layer and the heat-conducting layer; and An isolation groove, wherein the isolation groove is recessed from the pot mouth end of the composite pot body toward the inside of the composite pot body, so as to at least make the end surface of the bonding layer lower than the pot mouth end surface of the composite pot body; The bonding layer is an atomic diffusion layer between the substrate layer and the heat conducting layer; The ratio of the depth of the isolation trench to the width of the isolation trench is greater than or equal to 60 and less than or equal to 1000; and / or The width of the isolation groove is greater than or equal to 0.5 μm and less than or equal to 40 μm; and / or The depth of the isolation groove is greater than or equal to 0.1 mm and less than or equal to 1.2 mm.

2. The composite cookware according to claim 1, characterized in that: The bonding layer at the pot mouth end of the composite pot body is removed to form the isolation groove.

3. The composite cookware according to claim 1, characterized in that: The inner side surface of the isolation groove is an uneven surface.

4. The composite cookware according to claim 1, characterized in that: The isolation groove comprises an annular isolation groove.

5. The composite cookware according to claim 1, characterized in that: The width of the opening end of the isolation groove is greater than the width of the bottom wall of the isolation groove.

6. The composite cookware according to any one of claims 1 to 5, characterized in that: The composite pot body also includes: An anti-rust layer covers the exposed surface of the base layer.

7. The composite cookware according to claim 6, characterized in that: The anti-rust layer constitutes at least a portion of the side wall of the isolation groove.

8. The composite cookware according to claim 6, characterized in that: The anti-rust layer comprises a nitriding anti-rust layer.

9. The composite cookware according to any one of claims 1 to 5, characterized in that: The number of the heat conducting layer is at least one; and / or The number of the base layer is one, or The number of the base layers is two, and the heat conducting layer is located between the two base layers.

10. The composite cookware according to any one of claims 1 to 5, characterized in that: The base layer comprises a fine iron layer; and / or The heat-conducting layer comprises one or a combination of the following: an aluminum layer, a copper layer; and / or The bonding layer includes one of the following or a combination thereof: an iron-aluminum atomic diffusion layer, an iron-copper atomic diffusion layer.

11. A method for processing a composite cookware, characterized in that: The processing method of the composite cookware comprises: The composite plate is subjected to a molding process to obtain a composite pot body, wherein the composite pot body comprises a base layer and a heat-conducting layer which are stacked, and a bonding layer is formed at the connection between the base layer and the heat-conducting layer; At least the pot mouth end of the composite pot body is placed in a solution / atmosphere that can chemically react with the bonding layer to dissolve the bonding layer at the pot mouth end of the composite pot body to form an isolation groove; The bonding layer is an atomic diffusion layer between the substrate layer and the heat conducting layer; The ratio of the depth of the isolation trench to the width of the isolation trench is greater than or equal to 60 and less than or equal to 1000; and / or The width of the isolation groove is greater than or equal to 0.5 μm and less than or equal to 40 μm; and / or The depth of the isolation groove is greater than or equal to 0.1 mm and less than or equal to 1.2 mm.

12. The method for processing a composite cookware according to claim 11, characterized in that: The step of placing at least the pot mouth end of the composite pot body in a solution / atmosphere that can chemically react with the bonding layer specifically includes: The composite pot body is subjected to liquid nitriding treatment using an alkaline solution.

13. The method for processing a composite cookware according to claim 12, characterized in that: The treatment temperature of the liquid nitriding treatment is greater than or equal to 540° C. and less than or equal to 580° C.; and / or The treatment time of the liquid nitriding treatment is greater than or equal to 5 hours and less than or equal to 12 hours.

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