CN115161586B

CN115161586B - Method and pot for arc-melting metal coating

Info

Publication number: CN115161586B
Application number: CN202210749981.4A
Authority: CN
Inventors: 朱泽春; 潘少卿; 徐嘉悦; 李红亮
Original assignee: Joyoung Co Ltd
Current assignee: Joyoung Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2023-05-02
Anticipated expiration: 2042-06-29
Also published as: CN115161586A

Abstract

The application provides a method for arc-melting metal coating, which comprises the steps of respectively feeding titanium metal wires and stainless steel wires into two conductive channels through wire feeding rollers and respectively carrying positive and negative opposite charges, mutually approaching to each other to generate an arc heat source to melt the titanium metal wires and the stainless steel wires, and then atomizing and spraying compressed air onto the surfaces of pot blanks to form a melting layer. The titanium wire and the stainless steel wire are adopted to form the molten layer on the inner surface of the pot blank through arc molten injection, so that the advantages of the two materials are integrated, and the corrosion resistance and the wear resistance are both considered; the surface hardness of the formed meltallizing layer is HRC 45-HRC 65, the meltallizing layer can withstand abrasion of a slice or shell food materials, the porosity of the meltallizing layer is less than 5%, the transmission of corrosive medium to the interface between the meltallizing layer and a pot blank substrate through pores is effectively reduced, the peeling phenomenon of the meltallizing layer caused by oxidation is reduced, and therefore the meltallizing layer has better corrosion resistance.

Description

Method and pot for arc-melting metal coating

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a method for arc-melting a metal coating and a pot.

Background

With the rapid development of space science and technology, astronauts can use some kitchen electricity and cooking appliances in space, so that the quality of space life is improved. Because of the specificity of the space environment, the safety and the qualified quality of the kitchen electricity and the cooking utensil are particularly important, and the requirements on the kitchen electricity and the cooking utensil are more strict than those of the kitchen electricity and the cooking utensil in a normal common environment.

The applicant develops a cooking container coating technology for space bin cooking based on space kitchen projects participating in research and development, solves the cooking requirement of astronauts in the space bin, further researches the application of the technology to household cooking products, and particularly carries out intensive research on household high-temperature cooking appliances, so that the method and the pot for arc-melting metal coating are generated, and the use sanitation of users is improved.

In the conventional cooking utensil, a metal layer, such as a stainless steel melt-injection layer or a titanium metal melt-injection layer, is commonly melted on a base material of a pot embryo, so that the wear resistance of the pot and the binding force with a non-stick layer are improved, the melt-injection layer is difficult to uniformly spray on the inner surface of the pot in the prior art, the quality of the pot is affected, and the coating is easy to fall off; in addition, although the wear resistance of the cookware is improved in the prior art, the cookware is easy to corrode in the long-term cooking use process, the corrosion resistance of the pot melt-injection layer in the prior art is required to be improved, and each cookware is difficult to consider wear resistance, corrosion resistance and acid resistance.

It is known that the higher the heavy metal content in stainless steel, the stronger the acid resistance and anti-friction performance of the cooking container, and the higher the heavy metal content in the stainless steel, the longer the cooking use, and the more heavy metal content can be ingested by the user, which is not beneficial to the diet safety of the user. The titanium metal has stable property and corrosion resistance, and the surface of the metal titanium is covered with a layer of extremely thin naturally generated oxide film titanium and oxide (TiO 2). The film can also be called as 'titanium rust', but unlike iron rust, the compact oxide film does not react with nitric acid, dilute sulfuric acid, dilute hydrochloric acid and aqua regia which is the king of acid at normal temperature, has quite stable properties under most natural conditions, and has good corrosion resistance. However, titanium metal has a low heat-resistant temperature, titanium reacts with oxygen strongly when heated above 650 ℃ and reacts with nitrogen also when heated above 700 ℃, and domestic cooking, such as natural gas, has a flame temperature as high as 600-800 ℃, so that in a cooking vessel, although the corrosion resistance is good, the peeling resistance as a coating is poor due to poor high-temperature creep resistance.

Disclosure of Invention

The invention aims to provide a method and a pot for arc-melting metal coating, which are used for at least solving one of the technical problems described in the background art.

To achieve the above object, the present invention provides a method of arc-melting a metal coating, comprising the steps of:

s1, respectively feeding two different metal wires into two conductive channels through wire feeding rollers, and respectively endowing positive and negative opposite electrical properties, wherein one metal wire is a titanium metal wire or a titanium alloy wire, and the other metal wire is a stainless steel wire;

s2, the two metal wires are mutually close under the guidance of the conductive channel until the two metal wires extend out of the outlet of the conductive channel and arc heat sources are generated at preset positions to fuse the two metal wires, so as to obtain a melting mixture;

s3, atomizing the molten mixture of the titanium wire and the stainless steel wire by compressed air to form metal fine drops, and spraying the metal fine drops on the inner surface of the pot blank by means of air flow to form a molten layer.

In the technical scheme, the titanium is used as an active metal, so that the surface tension of molten drops can be reduced, the fluidity of molten particles is improved, the thermal expansion coefficient of a molten injection layer is reduced, and the internal stress of the molten injection layer is reduced, thereby playing the roles of reducing the porosity and improving the compactness, the lower porosity can effectively reduce the transmission of corrosive medium to the interface of a pot blank substrate through pores, thereby causing the peeling phenomenon of the molten injection layer caused by oxidation, having better corrosion resistance, adopting titanium metal combined with the mixed metal of stainless steel to melt the molten injection layer formed on the inner surface of the pot blank, having corrosion resistance and wear resistance, greatly improving the service life and the service quality of the pot, and improving the use experience of users.

Optionally, one of the two metal wires is a titanium metal wire, the other is a stainless steel wire, and the weight ratio of the titanium metal wire to the other metal wire in unit length is 1: (1.5-2).

Optionally, the wire feeding rates of the titanium wire and the stainless steel wire are equal.

In the technical scheme, the conveyor speeds of the two metal wires are equal, so that the content of the two metals in the metal melting mixture at each time point is equal, the content of each metal in the metal fine drop in the spraying process is equal, the corrosion resistance and the wear resistance of the part of the melt-spraying layer on the inner surface of the pot embryo are ensured and balanced, and the use experience of a user is improved.

Optionally, the preset position is a vertical distance D between an initial position of the metal fine drop and the inner surface of the pot embryo, and D is 70-180 mm.

Optionally, the air pressure of the compressed air is 0.5-0.8 MPa.

Optionally, the melting temperature of the melting is 2800-4350 ℃, and further, the melting temperature of the melting is 4000 ℃, so that on one hand, the wire material is melted instantly, the melting work efficiency is accelerated, and the defect that the wire material is not firmly combined with the base material of the pot embryo due to early solidification is avoided; on the other hand, the hard alloy compound of titanium-chromium-nickel is generated at the meltallizing temperature of 4000 ℃, so that the hardness of the meltallizing layer is improved.

According to the technical scheme, atomized metal fine droplets are conveniently and uniformly sprayed on the inner surface of the pot blank, the metal fine droplets are sprayed in a conical shape through compressed air, and the spraying distance of 70-180 mm is used for ensuring that the atomized metal fine droplets can be spread in a larger range on one hand, and preventing the metal fine droplets from being accumulated in one place, if the spraying distance is smaller than 70mm, the metal fine droplets are not spread and are easy to be accumulated in a small range on the inner surface of the pot blank quickly under the driving of air flow; on the other hand, the metal fine drops are prevented from being sprayed out of the inner surface of the pot blank to be wasted due to the fact that the distance is too far, or the metal fine drops are prevented from being slowly sprayed to the position where the metal fine drops are required due to the fact that the distance is too far, if the spraying distance is larger than 180mm, the range of the diffusion area of the metal fine drops is larger, although the fused layer is easy to uniformly spray on the inner surface of the pot blank, the metal fine drops are thinner at the moment, long-time spraying is needed, the spraying efficiency is lower, the spraying coverage area of the inner surface of the pot blank is not easy to control, and the waste of materials is easy to cause. The throw distances in this application may be specifically 70mm, 80mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm. The two conductive channels are respectively connected with the positive electrode and the negative electrode of the power supply, the titanium metal and the stainless steel carry opposite positive and negative charges when entering different conductive channels, the conductive channels are divided into a front section and a rear section, the front sections of the two conductive channels are mutually parallel and respectively connected with the positive electrode and the negative electrode of the power supply, the distances between the rear sections of the two conductive channels tend to be close to each other, so that the titanium metal wire and the stainless steel wire are guided to be close to each other, and the titanium metal wire and the stainless steel wire continue to move forwards along the guiding direction of the rear sections of the two conductive channels after extending out of the conductive channels until an arc heat source is generated and melted when the distance between the two conductive channels is close enough.

Optionally, the diameters of the titanium metal wire and the stainless steel wire are equal to each other and are 2.0mm, the titanium metal wire and the stainless steel wire with the same diameters enter the conductive channel at the same speed and arc-spray, the balance of the volume content of the titanium metal wire and the stainless steel wire is ensured, and meanwhile, the spraying time of the metal fine drops is 5-10 seconds, so that a spray layer with the thickness of 0.2-0.8 mm is formed. Too thin a layer of meltallizing can result in affecting its corrosion and wear resistance properties, too thick can result in a pan with a large overall weight, affecting user experience, and specifically, the thickness of the layer of meltallizing can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm.

Optionally, the outlet of the conductive channel swings along the inner surface of the pot embryo, so that the vertical distance between the initial position of the metal fine drop and the inner surface of the pot embryo is kept constant, and the metal fine drop is sprayed to cover the whole inner surface of the pot embryo.

In the above technical scheme, because the pot embryo generally comprises a pot bottom and an arc-shaped pot side wall, the pot bottom of a plurality of pot tools is round bottom to realize the oil gathering effect, when the pot is sprayed with the melt-spraying layer, if the spraying direction of the metal fine drops is only changed, the vertical distance from the metal fine drops to the inner surface of the pot embryo is changed, and further the thickness of the melt-spraying layer on each part of the inner surface of the pot embryo is obviously uneven, and the quality of the melt-spraying layer is affected.

Optionally, the surface roughness of the penetration layer is Ra 5-20 μm. In the technical scheme, the meltallizing layer has certain surface roughness, so that the non-adhesive layer arranged on the meltallizing layer and the meltallizing layer have good adhesion performance, the meltallizing layer and the non-adhesive layer are meshed together in a staggered mode, on the other hand, the surface roughness of the meltallizing layer influences the surface roughness of the inner surface of the pot, and in order to prevent the surface roughness of the inner surface of the pot from being too large to influence cooking or residual bacteria, the surface roughness of the meltallizing layer is not too large. The fusion-jet layer formed of the specific components thereof in the present application has a preferable bonding property with the non-adhesive layer, and has a surface roughness of Ra5 to 20. Mu.m. Specifically, the surface roughness values of the melt-blown layer in the present application may be Ra5 μm, ra6 μm, ra7 μm, ra8 μm, ra9 μm, ra10 μm, ra11 μm, ra12 μm, ra13 μm, ra14 μm, ra15 μm, ra16 μm, ra17 μm, ra18 μm, ra19 μm, ra20 μm. .

Optionally, the surface hardness of the penetration layer is HRC 45-HRC 65. The surface hardness can withstand the abrasion of a slice or shell food materials, the porosity of the meltallizing layer is less than 5%, the transmission of corrosive medium to the interface between the meltallizing layer and a pot blank substrate through pores is effectively reduced, the peeling phenomenon of the meltallizing layer caused by oxidation is reduced, and therefore the corrosion resistance is better.

Optionally, the method for arc-melting metal coating provided by the invention further comprises the step of carrying out surface pretreatment on the inner surface of the pot embryo, wherein the surface pretreatment comprises the following steps:

a. surface degreasing treatment: polishing the inner surface of the pot embryo to remove oiliness of the inner surface of the pot embryo, or spraying a solvent to remove oil;

b. surface roughening treatment: coarsening the inner surface of the pot embryo by adopting a polygonal abrasive to form a rough inner surface of the pot embryo, wherein the surface roughness of the rough inner surface is Ra 5-20 mu m.

The inner surface of the pot embryo is subjected to surface pretreatment, and then the melt-injection layer is sprayed, so that the binding force between the melt-injection layer and the inner surface of the pot embryo is improved.

The invention also discloses a pot, which adopts the method for arc-melting metal coating to spray and form a melting layer on the inner surface of the pot embryo, and the melting layer is also provided with a non-stick layer mixed with zinc oxide.

Optionally, the non-stick layer comprises a bottom coating and a top coating arranged on the bottom coating, wherein zinc oxide is distributed on the top coating, and the mass percentage of the zinc oxide in the top coating is 0.5-2%.

In the technical scheme, zinc oxide is mixed in the surface coating, and zinc ions are released by the zinc oxide to destroy and kill bacterial cells, so that the effects of sterilization and antibiosis are achieved. The mass percentage of zinc oxide in the surface coating is 0.5-2%, and the antibacterial and non-sticking effects are achieved.

The invention also provides a coating test method of the cooking container, the cooking container is provided with a container base body, a meltallizing layer is attached to at least the inner surface of the container base body, and the meltallizing layer is an alloy composition; attaching a non-adhesive layer on the inner surface of the meltallizing layer, wherein the non-adhesive layer is an organic polymer, and can be particularly fluorine resin; the coating test method of the cooking container comprises the following steps: performing a material bonding test on the container substrate to which the meltallizing layer is attached; performing an acid resistance test on the container substrate to which the meltallizing layer is attached; performing wear resistance test on the container matrix attached with the penetration layer; and carrying out corrosion resistance test on the container matrix attached with the non-adhesive layer.

Optionally, performing a material bonding test on the container substrate to which the melt-blown layer is attached, comprising: the melt-spraying layer is formed by coating the inner surface of the container base body by using multi-layer thermal spraying of melt-spraying raw materials of the alloy composition, and the thickness of the melt-spraying layer is 0.2-0.8 mm; and cutting the cooking container into a sample with a set area, observing the section structure and the tissue of the sample by using a metallographic microscope, and judging whether the tissue combination between the meltallizing layer and the container matrix is positive or not.

Optionally, after the cooking container is cut into samples with set areas, the samples are mechanically ground, polished and corroded, and then the section structure and the tissues of the samples are observed by a metallographic microscope.

The samples with the above set areas were: the pot embryo sprayed with the melt-blown layer was cut out in the transverse direction to obtain 15mm by 25mm specimens.

Optionally, said determining whether tissue bonding between said melt-blown layer and said container base is normal comprises observing whether the tissue of said melt-blown layer is uniform, and structural compactness; observing whether the porosity of the melt-blown layer is uniform or not and whether the porosity distribution is consistent or not; observing whether the penetration layer is tight with the container matrix or not and has no cracking.

Optionally, performing an acid resistance test on the container substrate to which the melt-blown layer is attached, comprising: and filling acetic acid solution into the cooking container, wherein the filling amount is 1/3-2/3 of the volume of the cooking container, closing a heating source after boiling, standing, and observing whether the inner surface of the cooking container changes color.

Further, acetic acid solution with the volume content of 4.5% -5.5% is filled into the cooking container, the filling amount is 1/3-2/3 of the volume of the cooking container, the heating source is turned off after boiling, the cooking container stands for 12 hours or more, and whether the inner surface of the cooking container changes color is observed.

The acetic acid solution in the present application may have a volume content of 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, 5.0%, 5.1%, 5.2%, 5.3%, 5.4%, 5.5% by volume, indicating that the cooking vessel is not acceptable in corrosion resistance if a visually observable color change occurs on the inner surface of the cooking vessel.

Optionally, performing a wear test on the container substrate to which the melt-blown layer is attached, comprising: and applying an acting force of 1.3-1.7 kg to the steel wire ball by using a mechanical arm, circularly rubbing the inner surface of the cooking container by using the steel wire ball under the acting force, putting eggs into the position where the steel wire ball rubs against the cooking container for cooking, and observing whether a pot sticking phenomenon occurs.

Further, the steel wire balls circularly rub the inner surface of the cooking container back and forth, the steel wire balls are replaced once every 1 ten thousand times of circulation, and the total circulation is 5 ten thousand times; the frequency of the steel wire ball rubbing the inner surface of the cooking container back and forth circularly is 55-65 times/min, and the back and forth circulation movement distance is 95-105 mm.

In the application, the frequency of the wire ball which is adopted to circularly rub the inner surface of the cooking container back and forth is 60 times/min, and the back and forth circulation movement distance is 100mm. And placing eggs in the positions where the steel wire balls rub against the cooking container for cooking, and if the phenomenon of sticking to the cooking container occurs, indicating that the abrasion resistance of the cooking container is unqualified.

Optionally, performing a corrosion resistance test on the container substrate to which the non-stick layer is attached, comprising: and filling the brine into the cooking container, boiling, keeping a micro-boiling state, closing a heating source, standing, and observing whether the inner surface of the cooking container has swelling change.

Further, the corrosion resistance test includes: and filling 4.5-5.5% of salt water into the cooking container, keeping a micro-boiling state for 6.5-7.5 hours after boiling, closing a heating source, standing for 16 hours or more, and observing whether the inner surface of the cooking container has swelling change.

The invention also provides a pot, wherein a melting layer is attached to the surface of a pot substrate, the melting layer is an alloy composition, the alloy composition is formed by melting and jetting metal wires of different materials, the melting layer is provided with a main spraying surface positioned at the center of the pot, and the thickness of the melting layer on the main spraying surface is 0.2 mm-0.8 mm; the alloy composition comprises, by mass, 5.43% -9.87% of chromium, 4.35% -13.4% of nickel, 0.54% -2.9% of molybdenum, 54.2% -63.71% of titanium, and the balance of iron and unavoidable impurities.

In the invention, the mass percent content of titanium can be 54.20%, 54.60%, 55.00%, 55.50%, 55.83%, 55.90%, 56.00%, 56.15%, 56.25%, 56.70%, 57.00%, 57.50%, 57.68%, 58.00%, 59.00%, 60.00%, 61.00%, 62.00%, 63.13%, 63.54%, 63.71%; the mass ratio content of chromium may be 5.43%, 5.70%, 5.93%, 6%, 6.43%, 6.52%, 6.75%, 6.88%, 6.93%, 7%, 7.43%, 7.70%, 7.93%, 8%, 8.43%, 8.7%, 8.75%, 8.93%, 9%, 9.06%, 9.43%, 9.65%, 9.87%; the nickel content may have a mass ratio of 4.35%, 4.5%, 5%, 5.5%, 5.8%, 6%, 6.5%, 6.52%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.14%, 10.5%, 10.87%, 11%, 11.5%, 12%, 12.5%, 13%, 13.4%; the mass ratio content of molybdenum may be 0.54%, 0.75%, 1%, 1.09%, 1.25%, 1.45%1.5%, 1.75%, 2%, 2.25%, 2.5%, 2.54%, 2.75%, 2.9%.

The alloy composition is used as the meltallizing layer of the cooking container, and the alloy composition contains titanium metal with a selected mass ratio, so that the meltallizing layer formed by the alloy composition has the stability of metallic titanium, titanium oxide film and oxide (TiO 2) are formed on the surface of the metallic titanium, and the alloy composition does not react with nitric acid, dilute sulfuric acid, dilute hydrochloric acid and aqua regia at normal temperature, and has the characteristics of excellent acid resistance and corrosion resistance.

Meanwhile, compared with pure titanium, the alloy composition of the application also contains other elements, and chromium and carbon in the alloy composition of the application generate hard phases Cr7C3 and Cr23C7 with high hardness, are dispersed and distributed in a solid solution reinforced melt-injection layer, play a role in precipitation hardening, and improve the wear resistance of the surface of a pot substrate. However, the grain boundary precipitation of chromium carbide is a main cause of the decrease in corrosion resistance, and the alloy composition obtained by blending the carbon content, the chromium content, and other elements of the present application has high strength and good corrosion resistance, and can effectively improve the wear resistance and scratch resistance of the molten layer. In addition, chromium is a ferrite generator, and although the increase of chromium content can improve the corrosion resistance of the fused-cast layer, the stability of the austenite structure is not facilitated, and the combination of the chromium content with other metal elements and the content thereof can obtain the fused-cast layer with strong corrosion resistance and stable austenite structure.

Nickel is an austenite forming element, the nickel content can keep the alloy composition to keep an austenite structure at low temperature, the hardness and tensile strength of stainless steel are reduced by increasing the nickel content, but the nickel content can keep high strength and high wear resistance when being matched with the alloy composition, and the corrosion rate of a molten layer in an active state is low due to the nickel content in the alloy composition.

In this application, molybdenum can improve corrosion resistance of stainless steel, which can strengthen the matrix of stainless steel and improve high temperature strength and creep performance of stainless steel.

In addition, the alloy composition forms a molten layer by the process of melting, and oxidation of the metal during the melting is unavoidable to form metal oxides, so that the molten layer contains trace amounts of metal oxides, for example, chromium and chromium oxides, nickel and nickel oxides, molybdenum and molybdenum oxides, iron and iron oxides in the alloy. The crystal grains of part of metal oxides are coarse, the strength is high, the existence of trace metal oxides improves the strength of the fused layer, and the fused layer is not easy to scratch and abrade due to the improvement of the strength. As for the content of the metal oxide, the content of the metal oxide obtained by controlling the content of the metal oxide without intentionally doping oxygen is controlled, and the amount of the oxide inevitably generated by the meltallizing process can meet the requirement.

According to the method, on the basis of titanium metal, the other elements are added, the material hardness of the meltallizing layer is effectively improved, the meltallizing layer needs to withstand the high temperature of flame in the cooking process and is subjected to the cooking processes such as stir-frying, boiling, stewing and steaming for a long time, in the cooking process, the metal material of the meltallizing layer has the technical effects of effectively resisting the shaping deformation under the long-term actions of constant temperature and constant load, avoiding the high-temperature creep deformation of the material, effectively improving the high-temperature compression creep deformation and the high-temperature tensile creep deformation of the material, and being not easy to break, foam or peel off even if being used for a long time.

Optionally, the alloy composition comprises 6.52% -9.06% chromium, 5.8% -10.87% nickel, 1.09% -2.54% molybdenum and 54.2% -63.54% titanium, and the balance is iron and unavoidable impurities.

Optionally, the alloy composition comprises 6.88% -8.7% chromium, 6.52% -10.14% nickel, 1.45% -2.54% molybdenum and 56.25% -63.54% titanium, and the balance is iron and unavoidable impurities.

Optionally, the alloy composition further comprises 0.02% -1.09% copper by mass%.

In the present invention, the mass ratio content of copper may be 0.02%, 0.15%, 0.2%, 0.22%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.55%, 0.6%, 0.65%, 0.7%, 0.72%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1%, 1.09%.

Optionally, the alloy composition includes 0.22% -0.72% copper by mass%. The chromium-nickel-molybdenum content in the alloy composition can be passivated even in a reducing environment such as sulfuric acid and formic acid by being matched with copper elements, so that the corrosion resistance of the alloy composition in acetic acid is improved. The alloy composition has strong acid resistance by combining the chromium content and the nickel content in the alloy composition with copper, and particularly has high-strength resistance to chloride clearance corrosion and stress corrosion cracking, is not easy to generate corrosion spots and cracks, and has strong pitting resistance.

Optionally, the alloy composition further comprises 0.64% -5.74% aluminum and 1.28% -3.83% vanadium in mass%. The aluminum is added on the basis of titanium, so that the alpha phase of titanium metal can be stabilized, and the aluminum-aluminum alloy has obvious effects of improving the normal temperature and high temperature strength of a fused layer, reducing the specific gravity and increasing the elastic modulus; meanwhile, a certain amount of vanadium is added, so that the performances of wear resistance, strength, hardness, ductility and the like of the fused layer can be further improved.

In the invention, the mass ratio content of aluminum can be 0.64%, 1.28%, 1.91%, 2.23%, 2.55%, 2.87%, 3.19%, 3.51%, 3.83%, 4.30%, 4.46%, 5%, 5.5%,; the mass ratio content of vanadium may be 0%, 2.00%, 2.23%, 2.55%, 2.87%, 3.00%, 3.19%.

Optionally, the alloy composition further comprises 3.51% -4.3% aluminum and 2.23% -2.87% vanadium in mass%.

Optionally, the container base is selected from at least one of iron, iron alloy, aluminum alloy, copper and copper alloy materials; the raw materials for the smelting are selected from at least two of iron alloy, stainless steel, titanium alloy and titanium metal.

Preferably, the container substrate is made of aluminum-silicon-magnesium alloy, and the smelting raw materials are stainless steel and titanium metal.

Optionally, the pan base body is provided with a bottom wall and a side wall, and the thickness of the bottom wall is 2.5mm-6mm; the main spraying surface completely covers the surface of the bottom wall, and the thickness ratio of the bottom wall to the thickness of the main spraying surface melt-spraying layer is 3.2-30.

The thickness of the melt-shot layer is too small, so that the wear resistance and corrosion resistance of the pot body are reduced, and the pot body is too heavy, wherein the thickness of the melt-shot layer can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm and 0.8mm; the bottom wall may have a thickness of 2.5mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.4 mm, 4.6 mm, 4.8 mm, 5.0 mm, 5.2 mm, 5.4 mm, 5.5 mm, 6mm; the ratio of the bottom wall thickness to the primary spray face melt-blown layer thickness may be 3.2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30.

Further, in this application, diapire thickness is preferably 5mm, and the meltallizing layer thickness on the main face that spouts is preferably 0.5mm, diapire thickness with the main face meltallizing layer thickness ratio that spouts is 10, this pan compromise quality such as wear-resisting corrosion-resistant and lightweight facilitate the use's characteristic this moment.

The main face that spouts in this application is located the pan center, and the pan center is like pot wall or other internal surfaces of cooking vessel such as pan more with slice or edible material, oil, vinegar etc. contact, therefore the setting of main face that spouts further strengthens the wear-resisting acid-resisting and corrosion resisting property at pan center.

Optionally, the meltallizing layer is at least attached to the inner surface of the pan base body, the inner surface of the container base body forms an attaching surface combined with the meltallizing layer, and the surface of the meltallizing layer is a cooking surface.

Optionally, the meltallizing layer is at least attached to the inner surface of the pan base body, at least one non-adhesive layer is attached to the surface of the meltallizing layer, and the surface of the non-adhesive layer is a cooking surface.

Optionally, zinc oxide is mixed in the non-stick layer forming the cooking surface, and the mass percentage of the zinc oxide is 0.5-2%. The mass percentage of zinc oxide may be specifically 0.5%, 0.7%, 0.9%, 1.0%, 1.2%, 1.4%, 1.5%, 1.6%, 1.8%, 2.0%.

Optionally, the non-stick coating comprises a primer layer and a top coating layer disposed on the primer layer, and the zinc oxide is distributed on the top coating layer.

Optionally, the surface roughness of the fused layer formed by fusing and injecting the metal wires with different materials is smaller than that of the fused layer formed by fusing and injecting the metal wires with single stainless steel, and the surface roughness of the fused layer formed by fusing and injecting the metal wires with different materials is Ra 5-20 μm.

In the technical scheme, the meltallizing layer has certain surface roughness, so that the non-adhesive layer arranged on the meltallizing layer and the meltallizing layer have good adhesion performance, the meltallizing layer and the non-adhesive layer are meshed together in a staggered mode, on the other hand, the surface roughness of the meltallizing layer influences the surface roughness of the inner surface of the pot, and in order to prevent the surface roughness of the inner surface of the pot from being too large to influence cooking or residual bacteria, the surface roughness of the meltallizing layer is not too large. The fusion-jet layer formed of the specific components thereof in the present application has a preferable bonding property with the non-adhesive layer, and has a surface roughness of Ra5 to 20. Mu.m. Specifically, the surface roughness values of the melt-blown layer in the present application may be Ra5 μm, ra6 μm, ra7 μm, ra8 μm, ra9 μm, ra10 μm, ra11 μm, ra12 μm, ra13 μm, ra14 μm, ra15 μm, ra16 μm, ra17 μm, ra18 μm, ra19 μm, ra20 μm.

Compared with the prior art, the invention has the beneficial effects that:

1. the titanium wire and the stainless steel wire are adopted to form the molten layer on the inner surface of the pot blank through arc molten injection, so that the advantages of the two materials are integrated, and the corrosion resistance and the wear resistance are both considered; the surface hardness of the formed meltallizing layer is HRC 45-HRC 65, the meltallizing layer can withstand abrasion of a slice or shell food materials, the porosity of the meltallizing layer is less than 5%, the transmission of corrosive medium to the interface between the meltallizing layer and a pot blank substrate through pores is effectively reduced, the peeling phenomenon of the meltallizing layer caused by oxidation is reduced, and therefore the meltallizing layer has better corrosion resistance.

2. The titanium wire and the stainless steel wire are melted and sprayed in real time on the preset distance from the inner surface of the pot blank, so that a certain amount of heat is kept when the spray layer is sprayed on the inner surface of the pot blank, the pot blank is heated by the heat, the bonding force between the inner surface of the pot blank and the spray layer is stronger, and meanwhile, the spray distance is constant, so that the spray layer is uniformly distributed on the inner surface of the pot blank.

3. The titanium wire and the unripe steel wire are fed at a constant speed by adopting the wire feeding roller, the content of the titanium wire and the unripe steel wire is controlled to be consistent all the time, the uniformity of the content of each material of the melt-blown layer is further ensured, and the quality of the melt-blown layer is improved.

4. The surface coating contains zinc oxide, so that the surface of the pot can be sterilized and antibacterial, and the use safety of a user is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic diagram showing an arc-melting process of the present invention;

FIG. 2 is a schematic flow chart of forming a fuse layer on a pot blank according to the present invention;

FIG. 3 is a schematic cross-sectional view of the pan of the present invention;

FIG. 4 is a comparative view of the cooking vessel of the present invention and the non-stick pan of the comparative example in example four after being subjected to an acid resistance test, respectively;

FIG. 5 is a schematic view of a cooking vessel according to the present invention after wear testing in a fifth embodiment;

FIG. 6 is a schematic diagram of comparative example 1 in example five after wear resistance testing;

FIG. 7 is a schematic diagram of comparative example 2 of example five after wear testing;

FIG. 8 is a schematic diagram of a cooking vessel according to the present invention after corrosion resistance testing in a sixth embodiment;

FIG. 9 is a schematic diagram of comparative example 1 in example six after corrosion resistance testing;

fig. 10 is a schematic diagram of comparative example 2 in example six after corrosion resistance test.

Reference numerals illustrate:

1. a pot embryo; 2. A fuse layer; 3. wire feeding rollers; 4. a conductive path; 5. and (3) a non-stick layer.

Detailed Description

In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than as described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Embodiment one:

as shown in fig. 1 and 2, the present embodiment provides a method for arc-spraying a metal coating, which includes the following steps:

s1, respectively feeding two different metal wires into two conductive channels 4 through wire feeding rollers 3, and respectively endowing positive and negative opposite electrical properties, wherein one metal wire is a titanium metal wire, and the other metal wire is a stainless steel wire;

S2, the titanium metal wire and the stainless steel wire are mutually close under the guidance of the conductive channel 4 until the titanium metal wire and the stainless steel wire extend out of the outlet of the conductive channel 4 and arc heat sources are generated at preset positions to fuse the titanium metal wire and the stainless steel wire, so as to obtain a melted mixture;

s3, atomizing the molten mixture of the titanium wire and the stainless steel wire by compressed air to form metal fine drops, and spraying the metal fine drops on the inner surface of the pot blank 1 by means of air flow to form a smelting layer 2.

The titanium metal wire and the stainless steel wire are driven by the wire feeding roller 3 to enter the two conductive channels 4 in parallel and are endowed with positive and negative opposite electric properties, then extend out of the outlets of the conductive channels 4 under the guidance of the conductive channels and continuously move towards the direction of approach of the two conductive channels, when the two metals with opposite electric properties are continuously approaching to a preset interval, an arc heat source is generated between the two metals and melts the two metals, and then the molten metal mixture is atomized and sprayed to the inner surface of the pot embryo 1 under the action of compressed air.

The two conductive channels 4 are respectively connected with the positive electrode and the negative electrode of the power supply, when titanium metal and stainless steel enter different conductive channels 4, positive and negative opposite charges are carried, the conductive channels 4 are divided into front sections and rear sections, the front sections of the two conductive channels 4 are parallel to each other and are respectively connected with the positive electrode and the negative electrode of the power supply, the distances between the rear sections of the two conductive channels 4 tend to be close to each other, so that the titanium metal wire and the stainless steel wire are guided to be close to each other, and after the titanium metal wire and the stainless steel wire extend out of the conductive channels 4, the titanium metal wire and the stainless steel wire continue to move forwards along the guiding direction of the rear sections of the two conductive channels 4 until an arc heat source is generated when the distance between the two conductive channels is close enough, and the two metals are melted.

Further, the weight ratio of titanium wire to stainless steel wire in unit length is 1: (1.5-2) to ensure the balance of the volumes of the titanium metal and the stainless steel material in the process of the meltallizing, so that the balance of the titanium metal and the stainless steel in the meltallizing layer 2 is ensured, and further the corrosion resistance and the wear resistance of the cookware meltallizing layer 2 are both realized. Specifically, the weight ratio of the titanium metal wire to the stainless steel wire in unit length can be selected to be 1:1.5, 1:1.76 and 1:2.

In this example, the weight ratio of titanium wire to stainless steel wire per unit length is 1:1.76, since the density of titanium metal is smaller than that of stainless steel, when the weight ratio of titanium wire to stainless steel wire per unit length is 1:1.76, the volume of the titanium metal wire is the same as that of the stainless steel wire raw material, so that the volume content of the titanium metal in the metal fine drop is as close as possible to that of the stainless steel, and the volume content of the titanium in the meltallizing layer 2 is the same as that of the stainless steel, thereby balancing the corrosion resistance and the wear resistance of the meltallizing layer 2, and the weight of the meltallizing layer 2 is smaller due to the characteristic of smaller density of the titanium metal, and the whole weight of the cooker is lightened.

Further, the wire feeding rates of the titanium wire and the stainless steel wire are equal, so that the electric charge quantity given to the titanium wire and the stainless steel wire in the conductive channel 4 can be stably controlled, the electric charge quantity of the titanium wire and the stainless steel wire is stable and equal, and the arc melting is further stably controlled, so that the titanium wire and the stainless steel wire are uniformly melted.

Further, the diameters of the titanium metal wires and the stainless steel wires are equal to each other and are 2.0mm, the titanium metal wires and the stainless steel wires with the same diameters enter the conductive channel 4 at equal speeds and arc fusion is carried out, the balance of the volume content of the titanium metal wires and the stainless steel wires is guaranteed, and meanwhile the spraying time of the metal fine drops is 5-10 seconds, so that the fusion layer 2 with the thickness of 0.2-0.8 mm is formed. Too thin a layer 2 can result in affecting its corrosion and wear resistance, too thick a layer can result in a pan with a large overall weight, affecting the user experience, and specifically, the thickness of the layer 2 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm.

Further, the vertical distance D between the initial position of the metal fine drop and the inner surface of the pot embryo 1 is 70-180 mm, wherein the initial position is the position where the titanium metal wire and the stainless steel wire extend out of the outlet of the conductive channel 4 and are fused by an arc heat source, and then the metal fine drop is formed by atomization under the action of compressed air and is sprayed to the inner surface of the pot embryo 1 under the driving of air flow.

On the one hand, the spraying distance of 70-180 mm ensures that atomized metal fine drops can be spread in a larger range, and one part of the atomized metal fine drops is prevented from being accumulated, if the spraying distance is smaller than 70mm, the metal fine drops are not spread and are easy to be accumulated in a small range on the inner surface of the pot embryo 1; on the other hand, the metal fine drops are prevented from being sprayed out of the inner surface of the pot blank 1 due to the fact that the distance is too far, or the metal fine drops are prevented from being slowly sprayed to the required positions due to the fact that the opening area of the pot is limited due to the fact that the distance is too far, if the spraying distance is larger than 180mm, the metal fine drops are large in diffusion area range, although the molten spraying layer 2 is easy to uniformly spray on the inner surface of the pot blank 1, at the moment, the metal fine drops are thin, long-time spraying is needed, spraying efficiency is low, the spraying coverage area of the inner surface of the pot blank 1 is not easy to control, and material waste is easy to cause. The spray distances in this embodiment may be 70mm, 80mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm.

Further, the outlet of the conductive path 4 swings along the inner surface of the preform 1 so that the vertical distance between the initial position of the metal fine droplet and the inner surface of the preform 1 is kept constant, and the metal fine droplet is ejected to cover the entire inner surface of the preform 1. Namely, the spraying distance of the metal fine drops is kept constant, and the pot embryo 1 generally comprises a pot bottom and an arc-shaped pot side wall, and the pot bottom of a plurality of pot tools is round bottom to realize the oil gathering effect, so when the pot tool is used for spraying the melt-spraying layer 2, if the spraying direction of the metal fine drops is only changed, the vertical distance from the metal fine drops to the inner surface of the pot embryo 1 is changed, further, the thickness of the melt-spraying layer 2 on each part of the inner surface of the pot embryo 1 is obviously uneven, and the quality of the melt-spraying layer 2 is affected.

The spraying distance is kept constant so that the layer 2 is sprayed as uniformly as possible on the inner surface of the blank 1. It should be explained that, because the air flow drives the metal fine droplets to spray towards the inner surface of the pot embryo 1 in a conical shape, the spraying distance of each metal fine droplet is different, but the vertical distance between the initial position and the inner surface of the pot embryo 1 is still constant, the tiny difference of the micro-uneven of the meltallizing layer 2 caused by conical spraying is negligible, and the spraying unevenness caused by the change of the vertical distance between the initial position of the metal fine droplet and the inner surface of the pot embryo 1 is obvious and cannot be ignored.

Further, the air pressure of the compressed air is 0.5-0.8 MPa.

Further, the penetration current is 80 to 140A.

Further, the surface roughness of the penetration layer 2 is Ra 5-20 μm, and the surface hardness of the penetration layer 2 is HRC 45-HRC 65.

Further, the method for arc-melting metal coating of the invention also comprises the following steps of carrying out surface pretreatment on the inner surface of the pot blank 1, wherein the surface pretreatment comprises the following steps:

a. surface degreasing treatment: polishing the inner surface of the pot embryo 1 to remove oiliness of the inner surface of the pot embryo 1, or spraying a solvent to remove oil;

b. surface roughening treatment: roughening the inner surface of the pot embryo 1 by adopting a polygonal abrasive to form a roughened inner surface of the pot embryo 1, wherein the roughened inner surface has a surface roughness Ra 5-20 mu m.

The surface roughness of the inner surface of the pot blank 1 after the surface treatment is Ra 25-20 mu m, the surface roughness is obvious, the inner surface of the pot blank 1 after the surface degreasing treatment and the surface roughening treatment can effectively improve the bonding strength with the penetration layer 2, and stronger mechanical jogging is formed.

The blank 1 may be formed by stretching, die casting or forging, and the blank 1 in this embodiment is formed by stretching an aluminum material, and the blank 1 further has a double bottom sheet, which is pressed into the bottom of the blank 1 by cold riveting to form a double bottom sheet, and an oil press with 2500T is used to press the double bottom sheet having magnetic conductivity.

After the meltallizing is finished, a sample with the thickness of 15mm multiplied by 25mm is transversely cut out from the pot blank 1 sprayed with the meltallizing layer 2, and the sample is mechanically ground, polished and corroded in sequence, and then the section structure is observed by a metallographic microscope, so that the meltallizing layer 2 and the pot blank 1 are tightly combined and have no cracking phenomenon. A certain smelting joint exists between the smelting layer 2 and the pot embryo 1, and the joint strength is higher.

The microstructure of the meltallizing layer 2 shows that the meltallizing layer 2 has even and compact structure, no larger pores are seen, and the distribution is non-coherent, and the porosity of the meltallizing layer 2 is less than 5 percent by using an image analysis method, because titanium is an active metal, the surface tension of molten drops can be reduced, the fluidity of molten particles is improved, the mutual wetting among the particles, the pot embryo 1 and the particles is also improved, the thermal expansion coefficient of the meltallizing layer 2 is reduced, the internal stress of the meltallizing layer is reduced, the effect of reducing the porosity and improving the compactness is achieved, the lower porosity can effectively reduce the transmission of corrosive mediums to the interface between the meltallizing layer 2 and a pot blank substrate through the pores, and the peeling phenomenon of the meltallizing layer 2 caused by oxidization is reduced, so that the meltallizing layer has better corrosion resistance.

Embodiment two:

as shown in fig. 3, this embodiment provides a pot, in which a method of arc-melting a metal coating in embodiment one is adopted to spray and form a melted layer 2 on the inner surface of a pot blank 1, and a non-stick layer 5 mixed with zinc oxide is further disposed on the melted layer 2.

In this embodiment, the non-adhesive layer 5 includes a base coat and a top coat disposed on the base coat, the zinc oxide is distributed on the top coat, and the mass percentage of the zinc oxide in the top coat is 0.5-2%.

The surface coating mixed with zinc oxide can resist bacteria by dissolving out metal zinc ions, namely, zinc oxide slowly releases zinc ions in an aqueous medium to destroy and kill cells, thereby achieving the aim of sterilization and antibiosis. The zinc oxide in the embodiment is mixed tetrapod-like zinc oxide, and because the tetrapod-like zinc oxide has acicular active center and tip effect, the tetrapod-like zinc oxide can activate water and oxygen in the air, generate hydroxyl free radicals and active oxygen ions, effectively sterilize and resist bacteria, greatly improve the antibacterial and degerming effects of the surface coating layer especially in a water-moist state, and improve the use safety and sanitation of the cookware

Embodiment III:

the embodiment provides a cooking container, which comprises a cooker substrate, wherein a melting layer is attached to the surface of the cooker substrate, the melting layer is an alloy composition, the alloy composition is formed by melting metal wires made of different materials, the melting layer is provided with a main spraying surface positioned at the center of the cooker, and the thickness of the melting layer on the main spraying surface is 0.2 mm-0.8 mm; the alloy composition comprises, by mass, 5.43% -9.87% of chromium, 4.35% -13.4% of nickel, 0.54% -2.9% of molybdenum, 54.2% -63.71% of titanium, and the balance of iron and unavoidable impurities.

Further, the pot base body is provided with a bottom wall and a side wall, and the thickness of the bottom wall is 2.5mm-6mm; the main spraying surface completely covers the surface of the bottom wall, and the thickness ratio of the bottom wall to the thickness of the main spraying surface melt-spraying layer is 3.2-30.

Further, the meltallizing layer is at least attached to the inner surface of the pot base body, the inner surface of the container base body forms an attaching surface combined with the meltallizing layer, and the surface of the meltallizing layer is a cooking surface; or the meltallizing layer is at least attached to the inner surface of the cooker base body, at least one non-adhesive layer is attached to the surface of the meltallizing layer, and the surface of the non-adhesive layer is a cooking surface.

The alloy composition is formed by melting and jetting metal wires with different materials, provides melting and jetting raw materials of the metal wires with different materials, and simultaneously melts and jets the melting and jetting raw materials of the metal wires with different materials to the surface of the cooking container base body to form the melting and jetting layer.

Further, the alloy composition comprises 6.52% -9.06% of chromium, 5.8% -10.87% of nickel, 1.09% -2.54% of molybdenum, 54.2% -63.54% of titanium, and the balance of iron and unavoidable impurities.

Further, the alloy composition comprises 6.88% -8.7% of chromium, 6.52% -10.14% of nickel, 1.45% -2.54% of molybdenum and 56.25% -63.54% of titanium, and the balance of iron and unavoidable impurities.

Further, the alloy composition further comprises 0.02% -1.09% copper by mass%.

Further, the alloy composition further comprises 0.22% -0.72% copper by mass%.

Further, the alloy composition further comprises 0.64% -5.74% of aluminum and 1.28% -3.83% of vanadium in mass%.

Further, the alloy composition further comprises 3.51% -4.3% of aluminum and 2.23% -2.87% of vanadium in mass%.

Further, the container substrate is selected from at least one of iron, iron alloy, aluminum alloy, copper and copper alloy materials; the smelting raw materials are selected from at least two of iron alloy, stainless steel, titanium alloy and titanium metal; the container matrix is made of aluminum-silicon-magnesium alloy, and the smelting raw materials are stainless steel and titanium metal.

The surface roughness of the penetration layer is Ra 5-20 mu m, the thickness of the penetration layer is uniformly sprayed on the inner surface of the pot base body, and the surface hardness of the penetration layer is HRC 45-HRC 65.

Further, the material bonding test of the container substrate to which the meltallizing layer is attached includes: the melt-spraying layer is formed by coating the inner surface of the container base body by using multi-layer thermal spraying of melt-spraying raw materials of the alloy composition, and the thickness of the melt-spraying layer is 0.2-0.8 mm; cutting the cooking container into a sample with a set area, observing the section structure and the tissue of the sample by using a metallographic microscope, and judging whether the tissue combination between the meltallizing layer and the container matrix is normal or not.

The test sample of 15mm multiplied by 25mm is cut out along the transverse direction of the pot embryo sprayed with the penetration layer, and after the test sample is mechanically ground, polished and corroded in sequence, the cross section structure of the test sample is observed by a metallographic microscope, so that the penetration layer and the pot embryo are tightly combined and have no cracking phenomenon. A certain smelting joint exists between the smelting layer and the pot embryo, and the joint strength is higher.

The microstructure of the fused layer shows that the fused layer is even and compact in structure, larger pores are not seen, the distribution of the fused layer is in a non-coherent shape, the porosity of the fused layer is less than 5% as measured by an image analysis method, and the fused layer and a container matrix are tightly and non-cracked, because titanium is an active metal, the surface tension of fused drops can be reduced, the fluidity of fused particles is improved, the mutual wetting of the particles, pot blanks and the particles is also improved, the thermal expansion coefficient of the fused layer is reduced, the internal stress of the fused layer is reduced, the effect of reducing the porosity and improving the compactness is achieved, a corrosion medium can be effectively reduced to be transmitted to the interface between the fused layer and a pot blank substrate through the pores, and the phenomenon that the fused layer is peeled off due to oxidization is reduced, so that the fused layer has better corrosion resistance is achieved.

Embodiment four:

the embodiment provides an acid resistance test method, wherein a plurality of cooking containers with various process conditions conforming to the third embodiment are randomly selected to be tested for a plurality of times respectively:

cleaning the cooking container of the third embodiment, naturally airing, filling 5% acetic acid solution into the cooking container, wherein the filling amount is about 3/5 of the volume of the cooking container, heating the cooking container to boil the acetic acid solution and keeping the boiling state for ten minutes, then closing the heat source, and standing for 12 hours. After standing, the acetic acid solution in the cooking container is put everywhere and the cooking container is cleaned, and whether the inner wall of the cooking container is discolored or not is observed.

Comparative example: the manufacturing process of the non-stick pan is consistent with that of the cooking container in the third embodiment, only the component content of the meltallizing layer is different, the inner surface of the non-stick pan and the inner surface of the cooking container in the third embodiment are similar in color to the naked eyes in the initial state, and a plurality of non-stick pans are respectively tested for a plurality of times under the same acid resistance test condition.

As shown in fig. 4, the upper pot in fig. 4 is the non-stick pot in the comparative example, and the lower pot in fig. 4 is the cooking container in the third embodiment. From the results of multiple tests, the inner surface of the non-stick pan of the conventional meltallizing layer in the market has obvious yellowing visible to the naked eye after acid resistance test, and the inner surface of the cooking container in the third embodiment is visible to the naked eye and is consistent with that before the acid resistance test. That is, the cooking container in the third embodiment has acid resistance exceeding that of the non-stick pan in the comparative example.

Fifth embodiment:

the embodiment provides a wear-resistant test method, wherein a plurality of cooking containers with various process conditions conforming to the third embodiment are randomly selected to be tested for multiple times respectively:

applying a force of 1.3 to 1.7 kg to the wire ball by using a mechanical arm, and circularly rubbing the wire ball against the inner surface of the cooking container in the third embodiment under the force, wherein the wire ball circularly rubs the inner surface of the cooking container back and forth, and the wire ball is replaced once every 1 ten thousands of times of circulation, and the total circulation is 5 ten thousands of times; the frequency of the steel wire ball rubbing the inner surface of the cooking container back and forth circularly is 55-65 times/min, and the back and forth circulation movement distance is 95-105 mm. And placing eggs in the positions where the steel wire balls rub against the cooking container for cooking, and observing whether the phenomenon of sticking to the pot occurs.

In this embodiment, a mechanical arm is used to apply 1.5 kg of force to the steel wire ball, the frequency of the steel wire ball rubbing the inner surface of the cooking container back and forth in a circulating way is 60 times/min, and the back and forth circulating movement distance is 100mm. As shown in fig. 5, the cooking container of the third embodiment still has a good non-stick effect.

Comparative example 1: the manufacturing process of the non-stick pan is consistent with that of the cooking container in the third embodiment, only the component content of the melt-shot layer is different, and the non-stick pans under the process condition are respectively tested by using the same wear-resisting test condition for a plurality of times. As shown in fig. 6, the non-stick pan of this comparative example underwent a severe sticking phenomenon after the abrasion resistance test.

Comparative example 2: in the present example, the non-stick pan having the melted-on layer with titanium content of more than 63.77% was used, and specifically, the non-stick pans having the melted-on layer with titanium content of 70%, 75% and 80% were used as examples for a plurality of tests, and the plurality of non-stick pans under the same conditions were tested a plurality of times. As shown in fig. 7, the non-stick pan of this comparative example underwent a severe sticking phenomenon after the abrasion resistance test.

In this embodiment, after the steel wire balls are circularly rubbed against the inner surface of the pan, scratches are inevitably generated on the inner surface of the pan, and the non-stick layer is inevitably damaged.

According to the results of multiple tests, the cooking container in the third embodiment has the advantages that the non-adhesive layer and the meltallizing layer are still kept to be non-adhesive after being damaged to a certain extent due to the combination of the special meltallizing layer and the non-adhesive layer, namely, the cooking container has good wear resistance; the non-stick pans of comparative examples 1 and 2 were sticky, i.e., the non-stick layers and the melt-blown layers were severely damaged, resulting in poor non-tackiness, i.e., poor abrasion resistance.

Example six:

the embodiment provides a corrosion resistance test method, wherein a plurality of cooking containers with various process conditions conforming to the third embodiment are randomly selected to be tested for a plurality of times respectively:

Filling 5% by mass of brine into the cooking container in the third embodiment, wherein the filling amount is about 3/5 of the volume of the cooking container, keeping the slightly boiling state for 7 hours after boiling, turning off the heating source and standing for 16 hours, and observing whether the inner surface of the cooking container has swelling change. As shown in fig. 8, the inner surface of the cooking container in the third embodiment is maintained in the state before the test after the corrosion resistance test, and no bulge change occurs.

Comparative example 1: the manufacturing process of the non-stick pan is consistent with that of the cooking container in the third embodiment, only the component content of the melt-shot layer is different, and after a plurality of non-stick pans are respectively tested for a plurality of times by using the same corrosion resistance test conditions, the phenomenon that the inner surfaces of the pans bulge is observed. As shown in fig. 9, the non-stick pan of the comparative example underwent a significant swelling phenomenon after the corrosion resistance test.

Comparative example 2: in the present embodiment, the non-stick pan having the meltallizing layer with the titanium content of less than 55.83% is used, and specifically, the non-stick pan having the meltallizing layer with the titanium content of 45%, 40% and 35% respectively is used as an example, and the non-stick pan is tested a plurality of times under the same corrosion resistance test conditions. As shown in fig. 10, the non-stick pan of the comparative example underwent a significant swelling phenomenon after the corrosion resistance test.

In this example, the cooking vessel of the third example and the non-stick pans of the comparative examples 1 and 2 were subjected to corrosion resistance tests by brine, respectively, and as a result of the test, the brine in the corrosion resistance test of this example had a phenomenon of swelling by partially penetrating through the non-stick layers of the comparative examples 1 and 2 and corroding the penetration layer under the test conditions, whereas the cooking vessel of the third example was subjected to the test without swelling, and the corrosion resistance performance thereof was significantly higher than that of the non-stick pans of the comparative examples 1 and 2.

The cooking container subjected to the test generally cannot be corroded, worn, corroded and the like in the daily use process. And each test condition is more severe, can distinguish the performance of conventional non-stick pan and the different meltallizing layer of component content's non-stick pan and the culinary art container in this application. Through the test, the acid resistance, the wear resistance and the corrosion resistance of the cooking container are obviously superior to those of the non-stick pan in the comparative example in the application, and the cooking container has more excellent performance.

The technical solution protected by the present invention is not limited to the above embodiments, and it should be noted that, the combination of the technical solution of any one embodiment with the technical solution of the other embodiment or embodiments is within the scope of the present invention. While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims

1. A method of arc-melting a metal coating comprising the steps of:

s3, atomizing a molten mixture of the titanium wire and the stainless steel wire by compressed air to form metal fine drops, and spraying the metal fine drops onto the inner surface of the pot blank by means of air flow to form a smelting layer;

the conveyor speeds of the two metal wires are equal; the meltallizing temperature of the meltallizing is 2800-4350 ℃.

2. The method of arc-melting metallic coating according to claim 1, wherein one of the two wires is a titanium wire and the other is a stainless steel wire, and the weight ratio of the titanium wire to the stainless steel wire per unit length is 1:

(1.5～2)。

3. the method for arc-melting metallic coating according to claim 1, wherein the preset position is a vertical distance D between the initial position of the metallic fine drop and the inner surface of the pot embryo, and D is 70-180 mm.

4. A method of arc-melting a metal coating according to claim 2, wherein the outlet of the conductive channel is oscillated along the inner surface of the preform such that the initial position of the metal droplet is maintained at a constant vertical distance from the inner surface of the preform and the metal droplet is ejected to cover the entire inner surface of the preform.

5. The method of arc-spraying a metal coating according to claim 1, wherein the air pressure of the compressed air is 0.5 to 0.8MPa.

6. The method of arc-spraying a metal coating according to claim 1, wherein the surface roughness of the sprayed layer is Ra 5-20 μm, or the thickness of the sprayed layer is 0.2-0.8 mm, or the surface hardness of the sprayed layer is HRC 45-HRC 65.

7. The method of arc-spraying a metal coating according to claim 1, further comprising surface pre-treating the inner surface of the pot embryo, said surface pre-treatment comprising the steps of:

b. surface roughening treatment: roughening the inner surface of the pot embryo by adopting a polygonal abrasive to form a roughened inner surface of the pot embryo, wherein the roughened inner surface has a surface roughness Ra of 5-20 mu m.

8. A pot, characterized in that a method for arc-melting metal coating according to any one of claims 1-7 is adopted to spray the inner surface of a pot embryo to form a melting layer, and a non-stick layer mixed with zinc oxide is further arranged on the melting layer.

9. The pot of claim 8, wherein the non-stick layer comprises a primer layer and a top coating layer disposed on the primer layer, the zinc oxide is distributed on the top coating layer, and the mass percentage of the zinc oxide in the top coating layer is 0.5-2%.