CN112746238A

CN112746238A - Preparation method for forming non-stick tool by nitriding treatment on surface of tool and non-stick tool

Info

Publication number: CN112746238A
Application number: CN202011601049.4A
Authority: CN
Inventors: 曾莉; 孙建
Original assignee: Jinhua Dingsheng Kitchenware Co Ltd
Current assignee: Jinhua Dingsheng Kitchenware Co Ltd
Priority date: 2020-03-25
Filing date: 2020-12-29
Publication date: 2021-05-04
Anticipated expiration: 2040-12-29
Also published as: CN112746238B; CN111254382A

Abstract

The invention belongs to the technical field of non-stick appliances, and particularly relates to a preparation method for forming a non-stick appliance by nitriding the surface of the appliance and the non-stick appliance, which comprises the following steps: the method comprises the following steps: hoisting the forming device into a gas nitriding furnace containing ammonium chloride; step two: closing the gas nitriding furnace, starting a fan in the gas nitriding furnace to heat the gas nitriding furnace, and starting a water pressure meter and a thermometer to measure the pressure and the temperature in the furnace; step three: regulating the temperature to 250-450 ℃, the water pressure to 0.1-0.2MPa, and carrying out heat preservation by temperature and water pressure in sections, wherein the total length of the heat preservation time is 60-100 minutes; the invention has the advantages that the gas nitriding process is reformed and innovated, the nitriding treatment process is redetermined, the production and processing operations are simple, the obtained non-stick appliance is based on the appliance material, the coating is not needed, the Teflon coating and ceramic coating process is replaced, the quality is stable, the energy is saved, the environment is protected, the pollution is avoided, the large-scale popularization is easy, and the non-stick performance reaches the international leading level.

Description

Preparation method for forming non-stick tool by nitriding treatment on surface of tool and non-stick tool

Technical Field

The invention relates to a preparation method for forming a non-stick tool by nitriding the surface of the tool and the non-stick tool. Belongs to the technical field of non-stick appliances.

Background

The appearance of the non-stick pan brings great convenience to the life of people, people do not need to worry about burning the fish when cooking the meat, and the fish slices stick to the wall of the pan when frying the fish. The appearance of the non-stick pan is not related to that of a common pan, but only a layer of polytetrafluoroethylene is coated on the inner surface of the pan, and the popular kitchen utensil is made by utilizing the excellent thermal property, chemical property, easy cleaning property and non-toxic property of the polytetrafluoroethylene. Polytetrafluoroethylene is reputed as "plastic king" which has good chemical corrosion resistance and aging resistance, and "aqua regia" is also difficult to corrode. The common plastic products are easy to age, and originally look good, cracks and even breakage can be generated after three or five years or ten years, products made of the plastic king can be placed outdoors and are exposed to the sun and rain, and no damage is generated for two or thirty years, so that the plastic products are widely used in life and chemical industry.

The plastic king is also widely applied to industrial absorption towers and corrosion-resistant containers, and along with the improvement of the plastic king, the plastic king has wider and wider application in modern life, agriculture, industry, national defense and scientific technology. Non-stick pans have long been commonly used in western developed countries. In China, the popularization of non-stick pans is from the 90 s, and the unique performance of the non-stick pans is accepted by more and more consumers.

The production history of the non-stick pan in China can be traced back to the end of the 70 s. At that time, the department of light industry organized a technical conference of internally coating and externally coating aluminum products participated by aluminum product manufacturing enterprises, scientific research units and foreign experts. Then, a problem of development of non-stick pans was proposed, and from this, development and development of non-stick pans started by more than 10 aluminum product manufacturers in China. A plurality of production enterprises in China introduce production lines of internally-coated and externally-coated aluminum-lined products from abroad successively, the annual output is about 2000 thousands of mouths, and the export amount accounts for more than 50%.

The pot products mainly comprise an aluminum pot, a stainless steel pot, an iron enamel pot, an iron pot and a non-stick pot. These pots have advantages and disadvantages, among which the advantage of non-stick pots is most prominent. The following is a comparison of the performance of these several pots: the aluminum pot has the characteristics of excellent heat distribution, 16 times of heat transfer effect as that of a stainless steel pot, and lighter pot body. But the aluminum pot is not easy to clean and has large oil smoke when using much oil. Stainless steel pans are characterized by poor heat distribution and easy generation of hot spots to burn food. The stainless steel pot is heavy, difficult to clean and easy to smoke when using much oil. The iron enamel pot has poor heat distribution and is easy to be burnt at the bottom. Such pots are not easy to clean and the surface is easy to break, resulting in rusting of the iron base material. The iron pan has poor heat distribution, is easy to generate heat points to burn food, is heavy, is not easy to clean, is easy to rust, and has large oil smoke when using much oil. The non-stick pan overcomes all the defects of the traditional pan, is easy to clean, and can be cleaned completely by light wiping. The non-stick pan can easily fry and fry food without sticking the bottom, can reduce oil consumption to the maximum extent, and has clean kitchen and less oil smoke. It can also help reduce fat intake, and comply with the consumption trend of modern people pursuing low fat and low calorie.

The non-stick pan products can be divided into a boiling pan, a frying pan and a milk pan according to different use functions, and the non-stick coating system on the inner surface can be divided into a one-layer system pan, a two-layer system pan and a three-layer system pan. One layer system refers to a non-stick layer consisting of a single coating; the two-layer system is a non-stick layer consisting of a bottom layer and a surface layer; the three-layer system is a non-stick layer consisting of 3 coatings of a bottom layer, a middle layer and a surface layer. The method can be divided into enamel, high temperature resistant paint and polished non-stick pan according to the external surface treatment method of the product.

There are two common types of non-stick pans:

firstly, a Teflon non-stick pan: teflon is a transliteration of Teflon. Teflon is a registered trademark used by DuPont on a range of fluoropolymer products. Subsequently, DuPont developed a range of products, including Teflon, in addition to Teflon polytetrafluoroethylene resin; AF (amorphous fluoropolymer), Teflon; FEP (fluorinated ethylene propylene resin), Teflon; FFR (fluoropolymer foam resin), Teflon; NXT (fluoropolymer resin), Teflon; PFA (perfluoroalkoxy resin), and the like. In 1954, french engineer korea gregarire (Colette) suddenly came to wonder that Teflon (Teflon), a non-stick material used by husband to coat fishing line to prevent knots, would certainly work well if it could be used on a frying pan. The non-stick pan which rescues countless modern housewives is born.

Secondly, ceramic coating non-stick pan: the ceramic plays an important role in the upgrading process of the non-stick pan. The ceramic has stable performance, and the safety of the ceramic is fully proved by using and testing for thousands of years. The product surface is compact and pore-free by using a nano technology, so that the non-stick effect is achieved.

Disclosure of Invention

The invention provides a preparation method for forming a non-stick tool by nitriding treatment on the surface of a tool, which is characterized in that the nitriding treatment process is redetermined through reforming and innovating a gas nitriding process, the production and processing operation is simple, the obtained non-stick tool is based on the material of the tool, a coating is not needed, the processes of a Teflon coating and a ceramic coating are replaced, the quality is stable, the energy is saved, the environment is protected, no pollution is caused, the large-scale popularization is easy, the non-stick performance reaches the international leading level, and the non-stick tool is formed.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a preparation method for forming a non-stick tool by nitriding treatment on the surface of the tool comprises the following steps:

the method comprises the following steps: hoisting the forming device into a gas nitriding furnace containing ammonium chloride;

step two: closing the gas nitriding furnace, starting a fan in the gas nitriding furnace, heating the gas nitriding furnace, and starting a water pressure meter and a temperature meter to measure the pressure and the temperature in the furnace;

step three: regulating the temperature to 250-450 ℃, the water pressure to 0.1-0.2MPa, and carrying out heat preservation by temperature and water pressure in sections, wherein the total length of the heat preservation time is 60-100 minutes;

step four: regulating the temperature to 470-480 ℃ and the water pressure to 0.2-0.3MPa, introducing ammonia gas and carbon dioxide into the gas nitriding furnace, and preserving the temperature for 200-360 minutes.

Further comprises the following steps: and (3) dripping blackening liquid into the gas nitriding furnace to oxidize the forming appliance for 60-120 minutes.

Further comprises the following steps: stopping heating, starting a cooling fan outside the furnace to cool the gas nitriding furnace, keeping the water pressure at 0.1-0.2MPa, cooling to 240 ℃, evacuating the furnace pressure, closing the fans inside and outside the furnace, and discharging.

And sixthly, introducing nitrogen for increasing the pressure in the gas nitriding furnace when the water pressure is below 0.1 MPa.

And in the third step, the water is divided into temperature and water, and heat preservation is carried out in a sectional manner, and ammonia gas is introduced into the gas nitriding furnace.

The step three of dividing the temperature into the water pressure and dividing the water pressure into sections for heat preservation refers to the following steps: adjusting the temperature to 280 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; regulating the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes.

The cooking utensil comprises a cooking utensil and a baking utensil, and the cooking utensil comprises a frying utensil, a steaming utensil and a rice cooker utensil.

In the first step, chlorine fertilizer and urea are also contained in the gas nitriding furnace.

And the blackening liquid in the second step comprises absolute ethyl alcohol, methanol and triethanolamine, and the weight part ratio of the absolute ethyl alcohol to the methanol to the triethanolamine is 1:1: 1.

A non-stick tool prepared by the preparation method for forming the non-stick tool by nitriding the surface of the tool.

The gas nitriding system is to put the workpiece in a furnace by NH₃Directly feeding gas into a nitriding furnace at 500-550 ℃, and keeping for 20-100 hours to ensure that NH is generated₃The gas is decomposed into (N) gas and (H) gas in atomic state and nitriding treatment is performed to form a wear-resistant and corrosion-resistant compound layer on the surface of the steel, the thickness of the compound layer is about 0.02-0.02 m/m, and the compound layer has a very hard Hv of 1000-1200 and is very brittle.

The invention has the following advantages and beneficial effects:

the preparation method for forming the non-stick tool by nitriding the surface of the tool and the non-stick tool, which are disclosed by the invention, improve the existing gas nitriding process, re-determine the nitriding process, are simple in production and processing operation, the obtained non-stick tool is based on the tool material, does not need a coating, replaces the Teflon coating and ceramic coating processes, is stable in quality, energy-saving, environment-friendly, pollution-free, easy to popularize on a large scale, and the non-stick performance reaches the international leading level. The common pot is made of multilayer steel, multilayer aluminum or steel-aluminum composite, the heat preservation of a gas nitriding system needs to be carried out at 500-550 ℃, the melting point of aluminum is 580-740 ℃, the workpiece is easy to melt in a nitriding furnace due to the relatively close temperature difference, and the quality of the appliance is difficult to guarantee, but the highest temperature of the preparation method is 480 ℃, the low-temperature nitriding is realized, and the quality of the appliance is guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram (1) of a preparation method for forming a non-stick utensil by nitriding the surface of the utensil and a non-stick test of a fried egg of the non-stick utensil according to the invention;

FIG. 2 is a schematic diagram (2) of the preparation method of the non-stick utensil formed by nitriding the surface of the utensil and the non-stick property test of the fried egg of the non-stick utensil in the invention;

FIG. 3 is a schematic diagram (3) of the preparation method of the non-stick utensil formed by nitriding the surface of the utensil and the non-stick property test of the fried egg of the non-stick utensil in the invention;

FIG. 4 is a schematic diagram (4) of the preparation method of the non-stick utensil formed by nitriding the surface of the utensil and the non-stick property test of the fried egg of the non-stick utensil in the invention;

FIG. 5 is a schematic diagram (5) of the preparation method of the non-stick utensil formed by nitriding the surface of the utensil and the non-stick property test of the fried egg of the non-stick utensil in the invention;

FIG. 6 is a schematic diagram (6) of the preparation method of the non-stick utensil formed by nitriding the surface of the utensil and the non-stick property test of the fried egg of the non-stick utensil in the invention;

FIG. 7 is a schematic view (7) of the preparation method of the invention for forming a non-stick utensil by nitriding the surface of the utensil and the non-stick test of fried eggs of the non-stick utensil;

FIG. 8 is a schematic diagram (8) of the preparation method of the non-stick utensil formed by nitriding the surface of the utensil and the non-stick property test of the fried egg of the non-stick utensil in the invention;

FIG. 9 is a schematic diagram (9) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of the pan cake of the non-stick pan;

FIG. 10 is a schematic view of the preparation method of the invention for forming a non-stick pan by nitriding the surface of a pan and the non-stick test of a pancake made of the non-stick pan (1);

FIG. 11 is a schematic view (2) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of the pan cake of the non-stick pan;

FIG. 12 is a schematic view (3) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of the pan cake of the non-stick pan;

FIG. 13 is a schematic diagram (4) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of the pan cake of the non-stick pan;

FIG. 14 is a schematic view of the preparation method of the invention for forming a non-stick pan by nitriding the surface of a pan and the non-stick test of a pancake made of the non-stick pan (5);

FIG. 15 is a schematic view (6) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of a pancake made of the non-stick pan;

FIG. 16 is a schematic view (7) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of a pancake made of the non-stick pan;

FIG. 17 is a schematic view (8) of the preparation method of the invention for forming a non-stick pan by nitriding the surface of the pan and the non-stick test of a pancake made of the non-stick pan;

FIG. 18 is a schematic diagram (9) of the preparation method of the invention for forming a non-stick pan by nitriding the pan surface and the non-stick test of the non-stick pan cake.

Detailed Description

The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1:

the method comprises the following steps: hoisting the forming device into a gas nitriding furnace containing ammonium chloride, chlorine fertilizer and urea;

step three: regulating the temperature to 250-450 ℃, the water pressure to 0.1-0.2MPa, and carrying out heat preservation by temperature and water pressure in sections, wherein the total length of the heat preservation time is 60-100 minutes; the ammonia gas is introduced into the gas nitriding furnace while the temperature and the water pressure are divided into sections for heat preservation, and the temperature and the water pressure are divided into sections for heat preservation: adjusting the temperature to 280 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes;

Step five: and (3) dripping blackening liquid (absolute ethyl alcohol, methanol and triethanolamine) into the gas nitriding furnace to oxidize the forming tool for 60-120 minutes.

Step six: stopping heating, starting a cooling fan outside the furnace to cool the gas nitriding furnace, keeping the water pressure at 0.1-0.2MPa, cooling to 240 ℃, evacuating the furnace pressure, closing the fans inside and outside the furnace, and discharging. If the water pressure is reduced to below 0.1MPa, nitrogen for increasing the pressure in the furnace can be introduced into the gas nitriding furnace, so that the pressure in the furnace is kept between 0.1 and 0.2 MPa.

The non-stick tool is prepared by the preparation method for forming the non-stick tool on the surface of the tool through nitriding treatment.

Example 2:

the method comprises the following steps: lifting 1500 batches of forming devices into a gas nitriding furnace containing ammonium chloride, chlorine fertilizer and urea; the weight part ratio of the ammonium chloride to the chlorine fertilizer to the urea is 1:1: 1;

step three: adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and carrying out heat preservation by temperature and water pressure in sections, wherein the total length of the heat preservation time is 90 minutes; the ammonia gas is introduced into the gas nitriding furnace while the temperature and the water pressure are divided into sections for heat preservation, and the temperature and the water pressure are divided into sections for heat preservation: adjusting the temperature to 280 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes;

step four: adjusting the temperature to 475 ℃ and the water pressure to 0.25MPa, introducing 10 cubic cubes of ammonia gas and 0.1 cubic cube of carbon dioxide into the gas nitriding furnace, and preserving the temperature for 300 minutes.

Step five: 20 kg of blackening liquid (the weight ratio of absolute ethyl alcohol, methanol and triethanolamine is 1:1:1) is dripped into the gas nitriding furnace to oxidize the forming tool, wherein the oxidation time is 90 minutes, and the higher the oxidation time is, the better the oxidation time is.

Step six: stopping heating, starting a cooling fan outside the furnace to cool the gas nitriding furnace, keeping the water pressure at 0.15MPa, cooling to 230 ℃, evacuating the furnace pressure, closing the fans inside and outside the furnace, and discharging. If the water pressure is reduced to below 0.1MPa, nitrogen which increases the pressure in the furnace can be introduced into the gas nitriding furnace, so that the pressure in the furnace is kept at 0.15 MPa.

The cooking utensil comprises a cooking utensil and a baking utensil, and the cooking utensil comprises a frying utensil, a steaming utensil and a rice cooker utensil. A non-stick tool prepared by the preparation method for forming the non-stick tool by nitriding the surface of the tool.

Example 3:

the method comprises the following steps: hoisting 1000 batches of forming devices into a gas nitriding furnace containing ammonium chloride, chlorine fertilizer and urea; the weight part ratio of the ammonium chloride to the chlorine fertilizer to the urea is 1:1: 1;

step three: adjusting the temperature to 450 ℃ and the water pressure to be 0.2MPa, and carrying out heat preservation by temperature and water pressure division and section by section, wherein the total length of the heat preservation time is 60 minutes; the ammonia gas is introduced into the gas nitriding furnace while the temperature and the water pressure are divided into sections for heat preservation, and the temperature and the water pressure are divided into sections for heat preservation: adjusting the temperature to 280 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes;

step four: adjusting the temperature to 470 ℃ and the water pressure to 0.2MPa, introducing 10 cubic parts of ammonia gas and 0.1 cubic part of carbon dioxide into the gas nitriding furnace, and preserving the temperature for 200 minutes.

Step five: 20 kg of blackening liquid (the weight ratio of absolute ethyl alcohol, methanol and triethanolamine is 1:1:1) is dripped into the gas nitriding furnace to oxidize the forming tool, wherein the oxidation time is 60 minutes, and the higher the oxidation time is, the better the oxidation time is.

Step six: stopping heating, starting a cooling fan outside the furnace to cool the gas nitriding furnace, keeping the water pressure at 0.1MPa, cooling to 220 ℃, evacuating the furnace pressure, closing the fans inside and outside the furnace, and discharging. If the water pressure is reduced to below 0.1MPa, nitrogen which increases the pressure in the furnace can be introduced into the gas nitriding furnace, so that the pressure in the furnace is kept at 0.1 MPa.

Example 4:

the method comprises the following steps: hoisting 1200 batches of forming devices into a gas nitriding furnace containing ammonium chloride, chlorine fertilizer and urea; the weight part ratio of the ammonium chloride to the chlorine fertilizer to the urea is 1:1: 1;

step three: adjusting the temperature to 250 ℃ and the water pressure to be 0.1MPa, and carrying out heat preservation by temperature and water pressure in sections, wherein the total length of the heat preservation time is 100 minutes; the ammonia gas is introduced into the gas nitriding furnace while the temperature and the water pressure are divided into sections for heat preservation, and the temperature and the water pressure are divided into sections for heat preservation: adjusting the temperature to 280 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes;

step four: regulating the temperature to 480 ℃ and the water pressure to 0.3MPa, introducing 10 cubic parts of ammonia gas and 0.1 cubic part of carbon dioxide into the gas nitriding furnace, and preserving the temperature for 360 minutes.

Step five: 20 kg of blackening liquid (the weight ratio of absolute ethyl alcohol, methanol and triethanolamine is 1:1:1) is dripped into the gas nitriding furnace to oxidize the forming tool, wherein the oxidation time is 120 minutes, and the higher the oxidation time is, the better the oxidation time is.

Step six: stopping heating, starting a cooling fan outside the furnace to cool the gas nitriding furnace, keeping the water pressure at 0.2MPa, cooling to 240 ℃, evacuating the furnace pressure, closing the fans inside and outside the furnace, and discharging. If the water pressure is reduced to below 0.1MPa, nitrogen which increases the pressure in the furnace can be introduced into the gas nitriding furnace, so that the pressure in the furnace is kept at 0.2 MPa.

The applicant obtains each step, temperature parameter range, time parameter range and water pressure parameter range in the preparation method through continuous optimization of hundreds of tests, and some test schemes and test results slightly different from the preparation method in hundreds of tests are as follows:

test example 1: the difference from example 1 is: step five and step six are omitted.

And (3) test results: the color of the molding device was different from one batch to another, and the color of the product was completely different from that of example 1.

Test example 2: the difference from example 1 is: step six is omitted.

And (3) test results: the color of the molding device is different from batch to batch, and the color of the product of a part of batches is the same as that of the product of the example 1.

Test example 3: the difference from example 1 is: the temperature in the fourth step is lower than 470 ℃.

And (3) test results: the molding tools of each lot rusted.

Test example 4: the difference from example 1 is: in the third step, the temperature is adjusted to 280 ℃ and the water pressure is 0.15MPa, and the temperature is kept for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes;

and (3) test results: the oxidation quality of the molded articles of each batch was lower than that of the molded article of example 1.

Test example 5: the difference from example 1 is: in the third step, the temperature is adjusted to 280 ℃ and the water pressure is 0.15MPa, and the temperature is kept for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 90 minutes;

Examples 2-4 were subjected to the omelet non-stick test and the battercake non-stick test:

non-stickiness test of omelettes:

in operation, the test pot was placed on the burner tip and heated to a specified temperature range (100-. And breaking the eggs above the pot and cooking the eggs for about 20-25 s until the eggs are coagulated into milk white. A shovel was used to shovel along the perimeter and bottom of the egg to loosen it from the pan. The eggs were shoveled loose and taken out of the pan.

Referring to fig. 1-8, the eggs were removed without damage and without leaving residue with an iron spatula.

Non-stickiness test of battercake:

in operation, the test pot was placed on the burner tip and heated to a specified temperature range (100-. And (4) sliding the batter into a dry pot along the pot wall, and cooking for about 30-35 seconds until the cake is formed. A spatula was used to scoop along the perimeter and bottom of the cake to loosen it from the pan. The pancake is shoveled loose and turned over and taken out of the pan.

Referring to fig. 9-18, the tortillas were removed from the topping pan with an iron spatula without leaving residue.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims

1. A preparation method for forming a non-stick tool by nitriding treatment on the surface of the tool is characterized by comprising the following steps: the method comprises the following steps:

2. The method of claim 1, wherein the non-stick implement is formed by nitriding the surface of the implement, the method comprising: the method comprises the following steps: and (3) dripping blackening liquid into the gas nitriding furnace to oxidize the forming appliance for 60-120 minutes.

3. The method for preparing a non-stick implement formed by nitriding a surface of an implement according to claim 1 or 2, wherein: comprises the sixth step: stopping heating, starting a cooling fan outside the furnace to cool the gas nitriding furnace, keeping the water pressure at 0.1-0.2MPa, cooling to 240 ℃, evacuating the furnace pressure, closing the fans inside and outside the furnace, and discharging.

4. The method of claim 3, wherein the non-stick implement is formed by nitriding the surface of the implement, the method comprising: and sixthly, introducing nitrogen for increasing the pressure in the gas nitriding furnace when the water pressure is below 0.1 MPa.

5. The method of claim 1, wherein the non-stick implement is formed by nitriding the surface of the implement, the method comprising: and in the third step, the water is divided into temperature and water, and heat preservation is carried out in a sectional manner, and ammonia gas is introduced into the gas nitriding furnace.

6. The method for preparing a non-stick implement formed by nitriding a surface of an implement according to claim 1 or 5, wherein: the step three of dividing the temperature into the water pressure and dividing the water pressure into sections for heat preservation refers to the following steps: adjusting the temperature to 280 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 10 minutes; adjusting the temperature to 350 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; adjusting the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes; regulating the temperature to 400 ℃ and the water pressure to 0.15MPa, and keeping the temperature for 30 minutes.

7. The method of claim 1, wherein the non-stick implement is formed by nitriding the surface of the implement, the method comprising: the cooking utensil comprises a cooking utensil and a baking utensil, and the cooking utensil comprises a frying utensil, a steaming utensil and a rice cooker utensil.

8. The method of claim 1, wherein the non-stick implement is formed by nitriding the surface of the implement, the method comprising: in the first step, chlorine fertilizer and urea are also contained in the gas nitriding furnace.

9. The method of claim 2, wherein the non-stick implement is formed by nitriding the surface of the implement, the method comprising: and the blackening liquid in the second step comprises absolute ethyl alcohol, methanol and triethanolamine, and the weight part ratio of the absolute ethyl alcohol to the methanol to the triethanolamine is 1:1: 1.

10. A non-stick implement prepared by the method of forming a non-stick implement by nitriding a surface of an implement according to claims 1-9.