Metal fiber composite non-stick cookware and its preparation method

Abstract

This invention discloses a metal fiber composite non-stick cookware and its preparation method. The metal fiber composite non-stick cookware includes a first metal fiber mesh layer, a second metal fiber mesh layer, and a substrate layer arranged sequentially from the inside out. The first and second metal fiber mesh layers are bonded to the substrate layer via a hot forging process. The shape of the first metal fiber mesh layer is flattened due to the hot forging process, creating a urn-shaped oil storage space with a small opening and a large base due to the porous structure of the first and second metal fiber mesh layers. This invention features a simple preparation process, utilizes the inherent high-temperature non-stick properties of edible oil, and is safe and healthy.

Description

Technical Field

[0001] This invention relates to the field of cookware, and more particularly to a metal fiber composite non-stick cookware and its preparation method. Background Technology

[0002] Currently, cookware surfaces that achieve physical non-stick properties require extremely complex processes such as plasma spraying, laser cladding, and thermal spraying to harden the substrate and form a lotus leaf-like non-stick structure. These processes are costly and produce inconsistent quality. Alternatively, etching or stamping a single piece of composite substrate results in enormous material costs, reduced thermal conductivity, and uneven heat distribution, which in turn diminishes the non-stick performance during cooking. Summary of the Invention

[0003] This invention provides a simple, safe, and healthy metal fiber composite non-stick cookware and its preparation method, which utilizes the high-temperature non-stick properties of edible oil. This is achieved through the following technical solution:

[0004] A metal fiber composite non-stick cookware includes a first metal fiber mesh layer, a second metal fiber mesh layer, and a substrate layer arranged sequentially from the inside to the outside. The first metal fiber mesh layer and the second metal fiber mesh layer are composited on the substrate layer by a hot forging process. The shape of the first metal fiber mesh layer is flattened due to the hot forging process, so that the pores of the first metal fiber mesh layer and the second metal fiber mesh layer form an oil storage space with a small opening and a large bottom in the shape of a urn.

[0005] Furthermore, the first metal fiber mesh layer is made of pure titanium, and the second metal fiber mesh layer is made of pure titanium or stainless steel 316 or 304.

[0006] Furthermore, the first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 50-150 micrometers, and the pore diameter of the first metal fiber mesh layer is 20-250 micrometers; the second metal fiber mesh layer is woven from pure titanium fibers or stainless steel fibers with a diameter of 50-150 micrometers, and the pore diameter of the second metal fiber mesh layer is 20-250 micrometers.

[0007] Furthermore, the first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 150 micrometers, and the pore diameter of the first metal fiber mesh layer is 50 micrometers; the second metal fiber mesh layer is woven from pure titanium fibers or stainless steel fibers with a diameter of 100 micrometers, and the pore diameter of the second metal fiber mesh layer is 150 micrometers.

[0008] Furthermore, the first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 100 micrometers, and the pore diameter of the first metal fiber mesh layer is 250 micrometers; the second metal fiber mesh layer is woven from pure titanium fibers or stainless steel fibers with a diameter of 100 micrometers, and the pore diameter of the second metal fiber mesh layer is 250 micrometers.

[0009] This design offers the following advantages: The metal fiber composite non-stick cookware of this invention consists of a double-layer metal fiber mesh layer bonded to the inner wall of an aluminum pot substrate layer via hot forging. Through hot forging, the two metal fiber mesh layers are bonded to the substrate layer under high temperature and pressure, resulting in a microporous structure between the double-layer metal fiber mesh layer and the substrate layer. Due to the hot forging process, the first metal fiber mesh layer is flattened to a certain extent, reducing the diameter of the pores, and its pore shape resembles a urn-shaped structure with a small opening and a large bottom. At room temperature, it can stably store oil within the pores. When the pot is heated, the air and oil in the pores expand, forming a non-stick film with extremely low tension on the pot surface, preventing food from sticking. It is highly suitable for domestic cooking habits and is safe and healthy.

[0010] A method for preparing a metal fiber composite physical non-stick cookware, applicable to the metal fiber composite physical non-stick cookware as described in any of the preceding claims, includes the following steps:

[0011] Step S10: Preheat the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer to 470℃-600℃ in a tunnel furnace;

[0012] Step S20: Using a forging press, at a temperature of 470℃-530℃, the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer are bonded together by a hot forging process to form a composite plate.

[0013] Step S30: The composite plate is formed into a pot blank by stretching or forging.

[0014] Step S40: Process the pot blank to form a pot.

[0015] Furthermore, prior to step S10, the procedure also includes:

[0016] Step S50: By punching or cutting, the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer are respectively made in the shape of circular pieces;

[0017] Step S60: Lay the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer in a circular shape from top to bottom in the center. Use a spot welding machine to spot weld the edges of the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer to fix the first metal fiber mesh layer and the second metal fiber mesh layer on the substrate layer.

[0018] Furthermore, after step S20, the method further includes:

[0019] Step S70: When the composite board is heated to 400±5℃ on a gas stove, it is immediately placed in water at 25±5℃ to cool for 30 seconds. Repeat the operation 25 times to complete the dry burning test.

[0020] When the dry-burning test result is qualified, operation step S30 is performed, wherein the qualification criteria for the dry-burning test are: no cracking, bubbling, separation from the bottom, or opening.

[0021] Further, step S40 includes:

[0022] Step S41: The pot blank is machined using a machining process;

[0023] Step S42: Degrease the pot blank;

[0024] Step S43: Apply ceramic non-stick coating or high-temperature resistant silicone resin paint to the outer surface of the pot blank;

[0025] Step S44: Use a cloth wheel or wool wheel to polish the inner surface of the pot blank;

[0026] Step S45: Perform ultrasonic cleaning on the pot blank, and then dry it with hot air at a temperature of 80℃-100℃.

[0027] Step S46: Assemble the accessories onto the pot blank through processes such as punching, riveting, or welding.

[0028] Further, step S42 includes:

[0029] Step S421: Spray the pot blank with hot water at a temperature of 50℃-60℃ for 40s-60s.

[0030] Step S422: Spray the pot blank with a sodium hydroxide solution with a concentration of 1%-2% and a temperature of 45℃-55℃ for 60s-80s.

[0031] Step S423: Rinse the pot blank twice with room temperature water, each rinse lasting 100s-120s;

[0032] Step S424: Rinse the pot blank with pure water or deionized water for 20-30 seconds.

[0033] Step S425: Quickly dry the pot blank under hot air at a temperature of 170℃-180℃;

[0034] Step S426: Cool the pot blank to room temperature.

[0035] Further, in step S50, the diameter of the first metal fiber mesh layer in the shape of a disc is R1, the diameter of the second metal fiber mesh layer in the shape of a disc is R2, and the diameter of the substrate layer in the shape of a disc is R3, where R3≥R1≥R2.

[0036] This design has the following advantages: The preparation method of the metal fiber composite non-stick cookware provided by this invention has a simple processing technology, stable performance, and is very suitable for industrial production. At the same time, the product utilizes the high-temperature non-stick properties of edible oil, which is very suitable for domestic cooking habits and is safe and healthy. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a metal fiber composite non-stick cookware according to an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 A magnified schematic diagram of a portion of a metal fiber composite non-stick cookware.

[0039] Figure 3 yes Figure 1 A schematic diagram of the structure of a metal fiber composite non-stick cookware that stores oil at room temperature;

[0040] Figure 4 yes Figure 1 A schematic diagram of the structure of a metal fiber composite non-stick cookware that expands when cooking to form a non-stick film as oil is stored;

[0041] Figure 5 This is a photograph of the surface layer of Example 1 under a 10x magnifying glass;

[0042] Figure 6 This is a photograph of the surface layer of Example 2 under a 10x magnifying glass.

[0043] The meanings of the reference numerals in the figure are as follows: 1. First metal fiber mesh layer; 2. Second metal fiber mesh layer; 3. Substrate layer; 4. Oil. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 2 As shown, the present invention provides a metal fiber composite non-stick cookware, comprising a first metal fiber mesh layer 1, a second metal fiber mesh layer 2, and a substrate layer 3 arranged sequentially from the inside to the outside. The first metal fiber mesh layer 1 and the second metal fiber mesh layer 2 are composited on the substrate layer 3 by a hot forging process. The shape of the first metal fiber mesh layer 1 is flattened due to the hot forging process, so that the pores of the first metal fiber mesh layer 1 and the second metal fiber mesh layer 2 form an oil storage space 4 with a small opening and a large bottom in the shape of a urn.

[0046] Furthermore, the first metal fiber mesh layer 1 is made of pure titanium, the second metal fiber mesh layer 2 is made of pure titanium or stainless steel 316 or 304, and the substrate layer 3 is made of aluminum.

[0047] Furthermore, the first metal fiber mesh layer 1 is woven from pure titanium fibers with a diameter of 50-150 micrometers, and the fiber structure is relatively porous. The diameter of the pores in the first metal fiber mesh layer 1 is 20-250 micrometers, and the material is pure titanium with a purity of 99.5% or higher. The second metal fiber mesh layer 2 is woven from pure titanium fibers or stainless steel fibers with a diameter of 50-150 micrometers, and the fiber structure is relatively porous. The diameter of the pores in the second metal fiber mesh layer 2 is 20-250 micrometers.

[0048] The metal fiber composite non-stick cookware of the present invention comprises a double-layer metal fiber mesh layer bonded to the inner wall of an aluminum pot substrate layer 3 by hot forging. Specifically, through hot forging, the two metal fiber mesh layers are bonded to the substrate layer 3 under high temperature and pressure, resulting in a microporous structure between the double-layer metal fiber mesh layer and the substrate layer 3. Due to the hot forging process, the first metal fiber mesh layer 1 is flattened to a certain extent, reducing the diameter of the pores, and its pore shape resembles a urn-shaped structure with a small opening and a large bottom. (Refer to...) Figure 3 At room temperature, it can stably store oil in the pores. (Refer to...) Figure 4 When the pot is heated, the air and oil in the pores expand due to the heat, forming a non-stick film with extremely low tension on the surface of the pot, which can prevent food from sticking inside the pot.

[0049] Meanwhile, when the first metal fiber mesh layer 1 is made of pure titanium, it can play a strong antibacterial role, thus ensuring that there are no bacterial residues in the microporous structure of the pot body. Pure titanium has a good antibacterial effect, and its uniform distribution on the surface of the pot body in a fiber mesh structure makes its antibacterial ability more obvious. At the same time, it also makes up for the problem of poor thermal conductivity of pure titanium, making it more thermally conductive than conventional titanium cookware.

[0050] During hot forging, the first metal fiber mesh layer 1 directly contacts the hot forging die. The die is harder and has a smooth surface, which flattens the first metal fiber mesh layer 1. Since the first metal fiber mesh layer 1 is a fibrous mesh structure, its surface shape is inherently uneven. Therefore, after the second metal fiber mesh layer 2 is deformed by the first metal fiber mesh layer 1, its surface shape is also not flat. This causes the second metal fiber mesh layer 2 to actually rivet together with the first metal fiber mesh layer 1, forming a tight bond.

[0051] This invention also provides a method for preparing metal fiber composite physical non-stick cookware, applicable to the metal fiber composite physical non-stick cookware as described in any of the preceding claims, comprising the following steps:

[0052] Step S50: By punching or cutting, the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer are respectively made in the shape of circular pieces; wherein, the diameter of the first metal fiber mesh layer in the shape of circular pieces is R1, the diameter of the second metal fiber mesh layer in the shape of circular pieces is R2, and the diameter of the substrate layer in the shape of circular pieces is R3, R3≥R1≥R2, so as to make the cookware structure stable;

[0053] Step S60: Lay the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer in a circular shape from top to bottom in the center. Use a spot welding machine to spot weld the edges of the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer to fix the first metal fiber mesh layer and the second metal fiber mesh layer on the substrate layer.

[0054] Step S10: Preheat the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer to 470℃-600℃ in a tunnel furnace;

[0055] Step S20: Using a forging press, at a temperature of 470℃-530℃, the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer are bonded together by a hot forging process to form a composite plate.

[0056] Step S30: The composite plate is formed into a pot blank by stretching or forging. During the forming process, the titanium fiber layer is placed inside the pot. The forming method can be stretching or forging. An electromagnetic induction sheet can also be applied to the bottom of the pot as needed.

[0057] Step S40: Process the pot blank to form a pot.

[0058] In this embodiment, after hot forging, the second metal fiber mesh layer is bonded to the metal substrate layer, and the fibers of the first metal fiber mesh layer are deformed and interlocked, forming a connection relationship in which the lower substrate layer is firmly bonded and does not loosen, and the upper pure titanium metal fiber layer is tightly fitted. Its bonding force is stronger than other composite and spraying processes. The metal fibers are embedded in it, and the firmness is strong. Moreover, the formation of a microporous pore structure with two layers of fiber diameter depth allows the pot body to still store oil film after regular cleaning. When the pot is used for cooking again, it still exhibits strong physical non-stick properties.

[0059] Due to the woven structure of the metal fibers, after being combined with the substrate layer, the pores of the fibers are evenly distributed throughout the inner wall of the pot, forming a uniform and stable oil storage pore layer. When the pot is heated, the oil in the oil storage pore layer expands to the surface of the pot, reducing the surface tension of the inner surface layer to below 20 dynes, which greatly improves the self-non-stick properties of the pot surface, thus achieving the non-stick properties of the cookware. When the pot cools down, the oil in the oil storage layer shrinks back into the oil storage layer, and when it is heated again, the cookware still has good non-stick properties.

[0060] The hot forging process requires the product temperature to be preheated to 470-600℃, and the temperature to be maintained at 470-530℃ during hot forging. The forging and pressing effect should be such that the double-layer metal fiber mesh layer is firmly bonded to the surface of the aluminum alloy substrate layer, with no transitional feel. The fiber composite board after hot forging must pass the dry burning test.

[0061] The forged composite plate is forged or stretched into a pot blank, and then further processed with finishing steps such as machining and internal and external polishing to beautify the surface of the pot. The finished pot body is then punched or welded with handles or side ears. The entire non-stick pan is then packaged. The specific processing steps include: forming, machining, degreasing, external coating, internal polishing, ultrasonic cleaning, and assembly.

[0062] Furthermore, after step S20, the method further includes:

[0063] Step S70: When the composite board is heated to 400±5℃ on a gas stove, it is immediately placed in water at 25±5℃ to cool for 30 seconds. Repeat the operation 25 times to complete the dry burning test.

[0064] When the dry-burning test result is qualified, operation step S30 is performed, wherein the qualification criteria for the dry-burning test are: no cracking, bubbling, separation from the bottom, or opening.

[0065] Fiber composite boards that pass the dry-burn test indicate that they meet production quality requirements.

[0066] Further, step S40 includes:

[0067] Step S41: The pot blank is machined using a machining process. The machining process is the same as that for conventional cookware products. Depending on the product requirements, a bottom corner machining process or a bottom machining process can be added. The process requirements are also the same as those for conventional products.

[0068] Step S42: Degrease the pot blank; the pot blank needs to be lubricated with oil during the forming process. This lubricating oil is not food grade. Therefore, in the subsequent process, the lubricating oil will be completely removed through the following steps to ensure the food safety of the pot.

[0069] Step S421: Spray the pot blank with hot water at a temperature of 50℃-60℃ for 40s-60s.

[0070] Step S422: Spray the pot blank with a sodium hydroxide solution with a concentration of 1%-2% and a temperature of 45℃-55℃ for 60s-80s.

[0071] Step S423: Rinse the pot blank twice with room temperature water, each rinse lasting 100s-120s;

[0072] Step S424: Rinse the pot blank with pure water or deionized water for 20-30 seconds.

[0073] Step S425: Quickly dry the pot blank under hot air at a temperature of 170℃-180℃;

[0074] Step S426: Cool the pot blank to room temperature;

[0075] Step S43: Apply ceramic non-stick coating or high-temperature resistant silicone resin paint to the outer surface of the pot blank; the main purpose of the outer coating is to protect the outer aluminum alloy, keep it clean and hygienic, and decorate the color of the outer surface.

[0076] Step S44: Use a cloth wheel or wool wheel to polish the inner surface of the pot blank; during internal polishing, use a cloth wheel or wool wheel to polish the inner surface of the pot, so that the surface presents the metallic texture of pure titanium, improves the surface smoothness of titanium fiber, and improves the non-stickness of the pot surface.

[0077] Step S45: Perform ultrasonic cleaning on the pot blank to deeply remove oil stains, floating dust and other impurities from the inner and outer surfaces of the pot. After cleaning, dry it with hot air at a temperature of 80℃-100℃.

[0078] Step S46: Assemble accessories such as handles or side ears onto the pot blank through processes such as punching, riveting, or welding.

[0079] The method for preparing the metal fiber composite non-stick cookware provided in this embodiment has a simple processing technology, stable performance, and is very suitable for industrial production. At the same time, the product utilizes the non-stick properties of edible oil itself at high temperatures, which is very suitable for domestic cooking habits and is safe and healthy.

[0080] Example 1

[0081] Please see Figure 5 The first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 150 micrometers, and the pore diameter of the first metal fiber mesh layer is 50 micrometers. The second metal fiber mesh layer is woven from 316 stainless steel fibers with a diameter of 100 micrometers, and the pore diameter of the second metal fiber mesh layer is 150 micrometers. The substrate layer is a 3003 rust-proof aluminum alloy disc with a thickness of 2.5 mm. The processed pot type is a 30x8.5cm wok with a bottom diameter of 170 mm. Example

[0082] Please see Figure 6 The first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 100 micrometers, and the pore diameter of the first metal fiber mesh layer is 250 micrometers. The second metal fiber mesh layer is woven from 316 stainless steel fibers with a diameter of 100 micrometers, and the pore diameter of the second metal fiber mesh layer is 250 micrometers. The substrate layer is a 3003 rust-proof aluminum alloy disc with a thickness of 2.5 mm. The processed pot type is a 30x8.5cm wok, with a bottom...

[0083] 170mm in diameter.

[0084] The performance of the pot body obtained above was tested and recorded in the table below. The specific performance testing methods are as follows:

[0085] (a) Non-stick test method: Test according to 4.2.1 in GB / T32095.2_2015, with each cycle consisting of 3 tests.

[0086] The test results are shown in Table 1.

[0087] Table 1 shows the non-stick performance test results for Examples 1 and 2.

[0088] Table 1

[0089] The above experiments show that Examples 1 and 2 have significant oil storage effects and more ideal non-stick properties.

[0090] (II) Antibacterial performance test:

[0091] Samples: Example 1, Example 2;

[0092] Control sample: Plastic film without antibacterial properties, provided by SGS laboratory.

[0093] The test method refers to GB / T21510-2008, Appendix C;

[0094] Test strains: Candida albicans ATCC 10231, Staphylococcus aureus ATCC 6538, Escherichia coli ATCC25922.

[0095] The test results are shown in Table 2.

[0096] Table 2 shows the antibacterial performance test results for Examples 1 and 2.

[0097]

[0098] Table 2

[0099] The above experiments show that the antibacterial effects of Examples 1 and 2 are significant.

[0100] The above detailed description is a specific description of feasible embodiments of the present invention. These embodiments are not intended to limit the scope of protection of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included within the scope of protection of the present invention.

Claims

1. A metal fiber composite non-stick cookware, characterized in that: It includes a first metal fiber mesh layer, a second metal fiber mesh layer and a substrate layer arranged sequentially from the inside to the outside. The first metal fiber mesh layer and the second metal fiber mesh layer are composited on the substrate layer by a hot forging process. The shape of the first metal fiber mesh layer becomes flat due to hot forging, so that the pores of the first metal fiber mesh layer and the second metal fiber mesh layer form an oil storage space with a small opening and a large bottom in the shape of a urn.

2. The metal fiber composite non-stick cookware according to claim 1, characterized in that: The first metal fiber mesh layer is made of pure titanium, and the second metal fiber mesh layer is made of pure titanium or stainless steel 316 or 304.

3. The metal fiber composite non-stick cookware according to claim 1, characterized in that: The first metal fiber mesh layer is woven from pure titanium fiber filaments with a diameter of 50 micrometers to 150 micrometers, and the pore diameter of the first metal fiber mesh layer is 20 micrometers to 250 micrometers. The second metal fiber mesh layer is woven from pure titanium fiber or stainless steel fiber with a diameter of 50-150 micrometers, and the pore diameter of the second metal fiber mesh layer is 20-250 micrometers.

4. The metal fiber composite non-stick cookware according to claim 1, characterized in that: The first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 150 micrometers, and the pore diameter of the first metal fiber mesh layer is 50 micrometers; the second metal fiber mesh layer is woven from pure titanium fibers or stainless steel fibers with a diameter of 100 micrometers, and the pore diameter of the second metal fiber mesh layer is 150 micrometers. Alternatively, the first metal fiber mesh layer is woven from pure titanium fibers with a diameter of 100 micrometers, and the pore diameter of the first metal fiber mesh layer is 250 micrometers; the second metal fiber mesh layer is woven from pure titanium fibers or stainless steel fibers with a diameter of 100 micrometers, and the pore diameter of the second metal fiber mesh layer is 250 micrometers.

5. A method for preparing a metal fiber composite physical non-stick cookware, applied to the metal fiber composite physical non-stick cookware as described in any one of claims 1-4, characterized in that: Includes the following steps: Step S10: Preheat the first metal fiber mesh layer, the second metal fiber mesh layer and the substrate layer to 470℃-600℃ in a tunnel furnace; Step S20: Using a forging press, at a temperature of 470℃-530℃, the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer are bonded together by a hot forging process to form a composite plate. Step S30: The composite plate is formed into a pot blank by stretching or forging. Step S40: Process the pot blank to form a pot.

6. The method for preparing metal fiber composite non-stick cookware according to claim 5, characterized in that: Before step S10, the method further includes: Step S50: By punching or cutting, the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer are respectively made in the shape of circular pieces; Step S60: Lay the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer in a circular shape from top to bottom in the center. Use a spot welding machine to spot weld the edges of the first metal fiber mesh layer, the second metal fiber mesh layer, and the substrate layer to fix the first metal fiber mesh layer and the second metal fiber mesh layer on the substrate layer.

7. The method for preparing metal fiber composite non-stick cookware according to claim 5, characterized in that: After step S20, the method further includes: Step S70: When the composite board is heated to 400±5℃ on a gas stove, it is immediately placed in water at 25±5℃ to cool for 30 seconds. Repeat the operation 25 times to complete the dry burning test. When the dry-burning test result is qualified, operation step S30 is performed, wherein the qualification criteria for the dry-burning test are: no cracking, bubbling, separation from the bottom, or opening.

8. The method for preparing metal fiber composite non-stick cookware according to claim 5, characterized in that: Step S40 includes: Step S41: The pot blank is machined using a machining process; Step S42: Degrease the pot blank; Step S43: Apply ceramic non-stick coating or high-temperature resistant silicone resin paint to the outer surface of the pot blank; Step S44: Use a cloth wheel or wool wheel to polish the inner surface of the pot blank; Step S45: Perform ultrasonic cleaning on the pot blank, and then dry it with hot air at a temperature of 80℃-100℃. Step S46: Assemble the accessories onto the pot blank through punching, riveting, or welding processes.

9. The method for preparing metal fiber composite non-stick cookware according to claim 8, characterized in that: Step S42 includes: Step S421: Spray the pot blank with hot water at a temperature of 50℃-60℃ for 40s-60s. Step S422: Spray the pot blank with a sodium hydroxide solution with a concentration of 1%-2% and a temperature of 45℃-55℃ for 60s-80s. Step S423: Rinse the pot blank twice with room temperature water, each rinse lasting 100s-120s; Step S424: Rinse the pot blank with pure water or deionized water for 20-30 seconds. Step S425: Quickly dry the pot blank under hot air at a temperature of 170℃-180℃; Step S426: Cool the pot blank to room temperature.

10. The method for preparing metal fiber composite non-stick cookware according to claim 6, characterized in that: In step S50, the diameter of the first metal fiber mesh layer in the shape of a disc is R1, the diameter of the second metal fiber mesh layer in the shape of a disc is R2, and the diameter of the substrate layer in the shape of a disc is R3, where R3≥R1≥R2.

Images