CN113068991B - Electromagnetic heating low-noise stainless steel pot and manufacturing method thereof - Google Patents
Electromagnetic heating low-noise stainless steel pot and manufacturing method thereof Download PDFInfo
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- CN113068991B CN113068991B CN202110235207.7A CN202110235207A CN113068991B CN 113068991 B CN113068991 B CN 113068991B CN 202110235207 A CN202110235207 A CN 202110235207A CN 113068991 B CN113068991 B CN 113068991B
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Abstract
The invention relates to the technical field of stainless steel pots, in particular to an electromagnetic heating low-noise stainless steel pot and a preparation method thereof. The electromagnetic heating low-noise stainless steel pot comprises a stainless steel pot body, a magnetic conductive coating and a foamed aluminum layer; the bottom of the stainless steel pot body is provided with a bulge, and the magnetic conductive coating is adhered to the surface of the bulge; the foam aluminum layer wraps the side face of the bulge and forms a bottom face which is flush with the bulge; the stainless steel pot body is made of the following raw materials in percentage by mass: 0.01-0.03% of carbon, 0.003-0.005% of rhenium, 0.01-0.02% of zinc, 1.3-1.8% of manganese, 0.012-0.033% of vanadium, 0.010-0.040% of zirconium, 0.013-0.016% of neodymium, 0.3-0.4% of porous ceramic, and the balance of Fe and inevitable impurities. The pot can enhance the absorption and reflection of sound waves when in use, reduce the noise generated in use, and has good wear resistance and high heat efficiency.
Description
Technical Field
The invention relates to the technical field of stainless steel pots, in particular to an electromagnetic heating low-noise stainless steel pot and a preparation method thereof.
Background
Stainless steel not only has strong chemical stability, but also has enough strength and plasticity, and has stable mechanical properties at certain high temperature or low temperature. Certain grades of this type of steel may also be used as heat resistant steels (including austenitic, ferritic, martensitic, and precipitation hardened); some steel can be used as high-quality low-temperature steel, and the corrosion resistance of the steel is still excellent in the using process. Since stainless steel has the above-mentioned unique properties, it is not difficult to imagine the position it occupies in national economy. Particularly, today, high-tech development, stainless steel is widely used in various fields. Especially, in the cooker with extremely high use efficiency, the proportion of the stainless steel pot is very high, and the stainless steel pot is heated by an electromagnetic oven when being mainly used at present, so that certain noise can be generated during use due to the limitation of a heating mode, and the use experience is influenced.
In the prior art, in order to solve the problem, a porous coating is mainly used on the surface of the stainless steel pot, but due to the large-area use, the thermal conductivity of the stainless steel pot is reduced due to a porous structure, and the energy consumption in the electric heat conversion is increased due to the existence of the porous structure. For example, in the cookware with the patent number of CN201610260473.4 and the manufacturing method thereof, the stainless steel pot body, the magnetic conduction coating and the antirust wear-resistant layer are used, the magnetic conduction coating is positioned on the outer side surface of the bottom wall of the stainless steel pot body, and the porosity of the pores of the magnetic conduction coating is 10-15%, so that the purpose of reducing noise is achieved. But the reduced thermal conductivity brought by it leads to poor practicality of the stainless steel pan. Also, for example, CN201610105817.4 patent is a manufacturing method and equipment of a novel smokeless pan based on ion beam technology, which uses an aluminum alloy, stainless steel or iron pan as a substrate, and utilizes ion beam technology to deposit a layer of non-toxic and environment-friendly superhard diamond-like carbon film with good thermal conductivity on the bottom of the pan, so as to improve the thermal conductivity, but not compromise the noise reduction effect. Therefore, it is necessary to develop a noise reduction stainless steel cookware with more practicability.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the electromagnetic heating low-noise stainless steel pot and the preparation method thereof, which can effectively reduce the noise in use while ensuring the heat conductivity. The specific technical scheme is as follows:
an electromagnetic heating low-noise stainless steel pot comprises a stainless steel pot body, a magnetic conductive coating and a foamed aluminum layer; the bottom of the stainless steel pot body is provided with a bulge, and the magnetic conductive coating is adhered to the surface of the bulge; the foam aluminum layer wraps the side face of the bulge and forms a bottom face which is flush with the bulge; the stainless steel pot body is made of the following raw materials in percentage by mass: 0.01-0.03% of carbon, 0.003-0.005% of rhenium, 0.01-0.02% of zinc, 1.3-1.8% of manganese, 0.012-0.033% of vanadium, 0.010-0.040% of zirconium, 0.013-0.016% of neodymium, 0.3-0.4% of porous ceramic, and the balance of Fe and inevitable impurities.
Further, the magnetic conductive coating is a chromium-based iron alloy coating.
Furthermore, the ratio of the bottom area of the foamed aluminum layer to the bottom area of the protrusion is 1: 10-11.
Furthermore, the fineness of the porous ceramic is 80-100 nm.
Further, the porous ceramic is prepared from the following raw materials in parts by mass: 8-12 parts of silicon dioxide, 15-18 parts of silicon carbide, 1-3 parts of titanium dioxide, 5-8 parts of zirconium oxide, 10-15 parts of soluble fiber, 3-5 parts of hydrophilic polyurethane resin, 1-3 parts of starch, 3-5 parts of ammonium chloride and 1-2 parts of sodium dodecyl benzene sulfonate.
The invention relates to a preparation method of an electromagnetic heating low-noise stainless steel pot, which comprises the following steps:
(1) mixing soluble fiber with dilute hydrochloric acid solution 5-8 times of the weight of the soluble fiber, soaking for 10-15min, adding hydrophilic polyurethane resin, starch, ammonium chloride and sodium dodecyl benzene sulfonate, stirring for 20-30min, adding silicon dioxide, silicon carbide, titanium dioxide and zirconium oxide, mixing uniformly, and drying at 50-55 ℃ under 0.01-0.03 standard atmospheric pressure for 5-8 h; the mass fraction of the dilute hydrochloric acid solution is 0.1-0.3%.
(2) Heating the mixture obtained in the last step to 1800-1900 ℃ under the protection of nitrogen, sintering for 8-10h, and processing the sintered ceramic into ultrafine powder by using an ultrafine pulverizer to obtain porous ceramic;
(3) mixing carbon, rhenium, zinc, manganese, vanadium, zirconium, neodymium and iron according to the mass ratio, pouring the mixture into a steelmaking furnace, vacuumizing the degree of vacuum to be 0.1-0.5Pa, melting the raw materials for 3-5h, adjusting the temperature to 1600 plus 1630 ℃, adding the porous ceramic prepared in the previous step, continuously melting for 20-30min, casting into a casting belt with the thickness of 2-4mm, and continuously casting under the protection of argon;
(4) treating the casting belt obtained in the last step at 900-950 ℃ for 1-2h, pressing into a casting belt with the thickness of 1.5-1.8mm, and reducing the temperature to 600-630 ℃ by using a water cooling mode; spraying dilute sulfuric acid with the mass fraction of 0.02-0.05% on the surface of the casting belt, washing with deionized water for 2-4 times, heating the casting belt to 800-850 ℃ under the protection of argon, and preserving heat for 1-2 min.
(5) Stamping the casting belt obtained in the last step into the stainless steel pot body, treating at 500-600 ℃ for 1-2h, and grinding and polishing;
(6) and (3) performing sand blasting treatment on the bottom protrusion of the stainless steel pot body, treating at the high temperature of 300-400 ℃ for 30-50s, spraying a magnetic conductive coating on the bottom surface of the protrusion, forging at normal temperature, performing high-pressure treatment and forging at normal temperature, adhering a layer of foamed aluminum layer on the side surface of the protrusion by using a high-temperature-resistant cement adhesive, and polishing the side surface and the bottom surface of the stainless steel pot to be flat.
The invention has the beneficial effects that:
according to the invention, the foam aluminum layer is used, the loose and porous structure of the foam aluminum layer is utilized, the noise is effectively absorbed, the foam aluminum layer is only adhered to the side surface of the bulge at the bottom, the electric-heat conversion between the bottom and the induction cooker is not influenced, the noise generated by the contact surface of the cooker and the induction cooker is maximally absorbed, and the use experience is improved. In addition, the foamed aluminum layer has a good heat conduction effect, and in the mutual heat conduction process of the induction cooker and the cookware, the foamed aluminum can absorb waste heat, so that the heat release of the cookware is reduced, and the overall heat efficiency is improved.
According to the invention, by utilizing the sound reflection characteristic, the porous ceramic is added in the stainless steel pot body manufacturing process, and the characteristic of higher melting point of the ceramic is utilized, so that the ceramic is difficult to melt in the processing process, larger crystals can be kept in the pot body material and uniformly mixed and distributed with small crystals formed by other metals, and obvious crystal form change along with smelting processing can not be brought, so that two mediums of an alloy body and the porous ceramic exist in the pot body, and the crystal complexity of the pot body is improved. When the pot body heating bottom surface produces the noise conduction to the internal portion of pot, the sound wave all can produce the reflection on the particle surface through each porous ceramic granule, and evenly distributed's porous ceramic granule can make the sound wave produce multiple reflection in the pot body to reflection at every turn all has energy loss, and the inside hole of porous ceramic granule is many in addition, has the absorption to the sound wave, makes the noise through the pot body have apparent reduction.
According to the invention, by using the characteristic that starch and ammonium chloride generate gas due to high heat and utilizing the advantage that starch solution is viscous and is convenient for material mixing, materials are uniformly contacted in the porous ceramic manufacturing process, more gas is generated during high-temperature sintering, the effect is uniform, the porosity of the obtained porous ceramic is higher, the obtained porous ceramic has a better sound wave blocking effect, and the significance is great for the noise reduction effect of the stainless steel pot.
According to the invention, vanadium is used in the raw material for manufacturing the stainless steel pot body, and can form a compound with trace carbon in the raw material, so that the structure and crystal grains of the pot body are refined, and the performance of the pot body is obviously improved. Can improve the wear resistance of the pot body and play a great role in the long-term use of the pot.
According to the invention, neodymium is used in the stainless steel pot body, so that the magnetic conductivity of the pot body is improved, and the heating effect of the induction cooker can be obviously improved.
The invention fully softens the fiber by using the dilute hydrochloric acid, is convenient for adsorbing and mixing materials, has obvious effect in the formation of the porous ceramic, can promote the molecular chain fracture of the fiber and the starch, is convenient for the organic components to diffuse among silicon dioxide, silicon carbide, titanium dioxide and zirconium oxide, and ensures that the sintered porous ceramic has a better pore structure.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be discussed below, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings can be obtained according to the embodiments shown in the drawings without creative efforts.
FIG. 1 is a bottom schematic view of an electromagnetic heating low-noise stainless steel cooker of the present invention.
FIG. 2 is a side view of the non-stick foamed aluminum layer of the electromagnetic heating low noise stainless steel cookware of the present invention.
Fig. 3 is a complete side view of the electromagnetic heating low noise stainless steel cookware of the present invention.
In the figure: 1-a foamed aluminum layer; 2-magnetic conductive coating; 3-a stainless steel pan body; 31-bump.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without the need for inventive work, are within the scope of the present invention. The chromium-based iron alloy coating used in the following examples is formed by spraying T-Fe450 packaging specification vacuum-charged chromium-based iron alloy magnetic powder provided by Bozhi alloy welding materials, Inc. of Nanogong City; the hydrophilic polyurethane resin is water-based aromatic polyurethane resin PUD6212 provided by Hangzhou Tuopau science and technology limited; the soluble fiber is resistant dextrin provided by Jiangsu Yunpeng biological technology limited company; the high-temperature-resistant cement adhesive is WD113 aluminum color repair adhesive provided by thousands of adhesive technologies and companies; the foamed aluminum is noise reduction foamed aluminum provided by Kunzhen Zhen electronics, Inc.
Example 1
Referring to fig. 1-3, an electromagnetic heating low-noise stainless steel pot comprises a stainless steel pot body 3, a magnetic conductive coating 2 and a foamed aluminum layer 1; the bottom of the stainless steel pot body 3 is provided with a bulge 31, and the magnetic conductive coating 2 is adhered to the surface of the bulge 31; the foamed aluminum layer 1 wraps the side surface of the protrusion 31 and forms a flush bottom surface with the protrusion 31; the ratio of the bottom area of the foamed aluminum layer 1 to the bottom area of the protrusion 31 is 1: 10; the magnetic conductive coating 2 is a chromium-based iron alloy coating;
the stainless steel pot body 3 is prepared from the following raw materials in percentage by mass: 0.01% of carbon, 0.003% of rhenium, 0.01% of zinc, 1.3% of manganese, 0.012% of vanadium, 0.010% of zirconium, 0.013% of neodymium, 0.3% of porous ceramic, and the balance of Fe and inevitable impurities; the fineness of the porous ceramic is 80 nm; the porous ceramic is prepared from the following raw materials in parts by mass: 8 parts of silicon dioxide, 15 parts of silicon carbide, 1 part of titanium dioxide, 5 parts of zirconium oxide, 10 parts of soluble fiber, 3 parts of hydrophilic polyurethane resin, 1 part of starch, 3 parts of ammonium chloride and 1 part of sodium dodecyl benzene sulfonate.
The preparation method of the electromagnetic heating low-noise stainless steel pot comprises the following steps:
(1) mixing soluble fiber with dilute hydrochloric acid solution 5 times of the weight of the soluble fiber, soaking for 10min, adding hydrophilic polyurethane resin, starch, ammonium chloride and sodium dodecylbenzene sulfonate, stirring for 20min, adding silicon dioxide, silicon carbide, titanium dioxide and zirconium oxide, mixing uniformly, and drying at 50 ℃ under 0.01 standard atmospheric pressure for 5 h;
(2) heating the mixture obtained in the last step to 1800 ℃ under the protection of nitrogen, sintering for 8 hours, and processing the sintered ceramic into superfine powder by using a superfine pulverizer to obtain porous ceramic;
(3) mixing carbon, rhenium, zinc, manganese, vanadium, zirconium, neodymium and iron according to the mass ratio, pouring the mixture into a steelmaking furnace, vacuumizing the degree of vacuum to 0.1Pa, melting the raw materials, smelting for 3 hours, adjusting the temperature to 1600 ℃, adding the porous ceramic prepared in the previous step, continuously smelting for 20 minutes, casting into a casting belt with the thickness of 2mm, and continuously casting under the protection of argon;
(4) treating the cast strip obtained in the last step at 900 ℃ for 1h, pressing the cast strip into a cast strip with the thickness of 1.5mm, and reducing the temperature to 600 ℃ by using a water cooling mode; spraying dilute sulfuric acid with the mass fraction of 0.02% on the surface of the casting belt, washing with deionized water for 2 times, heating the casting belt to 800 ℃ under the protection of argon, and preserving heat for 1 min.
(5) Stamping the cast strip obtained in the last step into a stainless steel pot body 3, processing for 1h at 500 ℃, and grinding and polishing;
(6) and (3) carrying out sand blasting treatment on the bottom protrusion 31 of the stainless steel pot body 3, treating at the high temperature of 300 ℃ for 30s, spraying the magnetic conduction coating 2 on the bottom surface of the protrusion 31, forging and pressing at normal temperature, adhering a layer of foam aluminum layer 1 on the side surface of the protrusion 31 by using a high-temperature-resistant cement adhesive, and polishing the side surface and the bottom surface of the stainless steel pot smoothly.
Example 2
Referring to fig. 1-3, an electromagnetic heating low-noise stainless steel pot comprises a stainless steel pot body 3, a magnetic conductive coating 2 and a foamed aluminum layer 1; the bottom of the stainless steel pot body 3 is provided with a bulge 31, and the magnetic conductive coating 2 is adhered to the surface of the bulge 31; the foamed aluminum layer 1 wraps the side surface of the protrusion 31 and forms a flush bottom surface with the protrusion 31; the ratio of the bottom area of the foamed aluminum layer 1 to the bottom area of the protrusion 31 is 1: 11; the magnetic conductive coating 2 is a chromium-based iron alloy coating;
the stainless steel pot body 3 is prepared from the following raw materials in percentage by mass: 0.03% of carbon, 0.005% of rhenium, 0.02% of zinc, 1.8% of manganese, 0.033% of vanadium, 0.040% of zirconium, 0.016% of neodymium, 0.4% of porous ceramic, and the balance of Fe and inevitable impurities; the fineness of the porous ceramic is 100 nm; the porous ceramic is prepared from the following raw materials in parts by mass: 12 parts of silicon dioxide, 18 parts of silicon carbide, 3 parts of titanium dioxide, 8 parts of zirconia, 15 parts of soluble fiber, 5 parts of hydrophilic polyurethane resin, 3 parts of starch, 5 parts of ammonium chloride and 2 parts of sodium dodecyl benzene sulfonate.
The preparation method of the electromagnetic heating low-noise stainless steel pot comprises the following steps:
(1) mixing soluble fiber with dilute hydrochloric acid solution 8 times of the weight of the soluble fiber, soaking for 15min, adding hydrophilic polyurethane resin, starch, ammonium chloride and sodium dodecylbenzene sulfonate, stirring for 30min, adding silicon dioxide, silicon carbide, titanium dioxide and zirconium oxide, uniformly mixing, and drying at 55 ℃ under 0.03 standard atmospheric pressure for 8 h;
(2) heating the mixture obtained in the last step to 1900 ℃ under the protection of nitrogen, sintering for 10h, and processing the sintered ceramic into superfine powder by using a superfine pulverizer to obtain porous ceramic;
(3) mixing carbon, rhenium, zinc, manganese, vanadium, zirconium, neodymium and iron according to the mass ratio, pouring the mixture into a steelmaking furnace, vacuumizing the degree of vacuum of 0.5Pa, melting the raw materials, smelting for 5 hours, adjusting the temperature to 1630 ℃, adding the porous ceramic prepared in the previous step, continuously smelting for 30 minutes, casting into a casting belt with the thickness of 4mm, and continuously casting under the protection of argon;
(4) treating the casting belt obtained in the last step at 950 ℃ for 2h, pressing the casting belt into a casting belt with the thickness of 1.8mm, and reducing the temperature to 630 ℃ by utilizing a water cooling mode; spraying dilute sulfuric acid with the mass fraction of 0.05% on the surface of the casting belt, washing with deionized water for 4 times, heating the casting belt to 850 ℃ under the protection of argon, and preserving heat for 2 min.
(5) Stamping the cast strip obtained in the last step into the stainless steel pot body 3, processing for 2 hours at 600 ℃, and grinding and polishing;
(6) and (3) performing sand blasting treatment on the bottom protrusion 31 of the stainless steel pot body 3, treating at the high temperature of 400 ℃ for 50s, spraying the magnetic conductive coating 2 on the bottom surface of the protrusion 31, forging and pressing at normal temperature, adhering a layer of foam aluminum layer 1 on the side surface of the protrusion 31 by using a high-temperature-resistant cement adhesive, and polishing the side surface and the bottom surface of the stainless steel pot smoothly.
Example 3
Referring to fig. 1-3, an electromagnetic heating low-noise stainless steel pot comprises a stainless steel pot body 3, a magnetic conductive coating 2 and a foamed aluminum layer 1; the bottom of the stainless steel pot body 3 is provided with a bulge 31, and the magnetic conductive coating 2 is adhered to the surface of the bulge 31; the foamed aluminum layer 1 wraps the side surface of the protrusion 31 and forms a flush bottom surface with the protrusion 31; the ratio of the bottom area of the foamed aluminum layer 1 to the bottom area of the protrusion 31 is 1: 10.1; the magnetic conductive coating 2 is a chromium-based iron alloy coating;
the stainless steel pot body 3 is prepared from the following raw materials in percentage by mass: 0.02% of carbon, 0.0035% of rhenium, 0.012% of zinc, 1.38% of manganese, 0.01233% of vanadium, 0.0140% of zirconium, 0.016% of neodymium, 0.3% of porous ceramic, and the balance of Fe and inevitable impurities; the fineness of the porous ceramic is 100 nm; the porous ceramic is prepared from the following raw materials in parts by mass: 12 parts of silicon dioxide, 18 parts of silicon carbide, 3 parts of titanium dioxide, 5 parts of zirconium oxide, 10 parts of soluble fiber, 3 parts of hydrophilic polyurethane resin, 3 parts of starch, 5 parts of ammonium chloride and 2 parts of sodium dodecyl benzene sulfonate.
The preparation method of the electromagnetic heating low-noise stainless steel pot comprises the following steps:
(1) mixing soluble fiber with dilute hydrochloric acid solution 8 times of the weight of the soluble fiber, soaking for 10min, adding hydrophilic polyurethane resin, starch, ammonium chloride and sodium dodecylbenzene sulfonate, stirring for 30min, adding silicon dioxide, silicon carbide, titanium dioxide and zirconium oxide, mixing uniformly, and drying at 50 ℃ under 0.03 standard atmospheric pressure for 5 h;
(2) heating the mixture obtained in the last step to 1900 ℃ under the protection of nitrogen, sintering for 8h, and processing the sintered ceramic into superfine powder by using a superfine pulverizer to obtain porous ceramic;
(3) mixing carbon, rhenium, zinc, manganese, vanadium, zirconium, neodymium and iron according to the mass ratio, pouring the mixture into a steelmaking furnace, vacuumizing the degree of vacuum of 0.5Pa, melting the raw materials, smelting for 3h, adjusting the temperature to 1630 ℃, adding the porous ceramic prepared in the previous step, continuously smelting for 20min, casting into a casting belt with the thickness of 4mm, and continuously casting under the protection of argon;
(4) treating the casting belt obtained in the last step at 950 ℃ for 2h, pressing the casting belt into a casting belt with the thickness of 1.5mm, and reducing the temperature to 630 ℃ by utilizing a water cooling mode; spraying dilute sulfuric acid with the mass fraction of 0.02% on the surface of the casting belt, washing with deionized water for 4 times, heating the casting belt to 800 ℃ under the protection of argon, and preserving heat for 2 min.
(5) Stamping the cast strip obtained in the last step into the stainless steel pot body 3, processing for 1h at 600 ℃, and grinding and polishing;
(6) and (2) performing sand blasting treatment on the bottom protrusion 31 of the stainless steel pot body 3, treating at the high temperature of 400 ℃ for 30s, spraying the magnetic conductive coating 2 on the bottom surface of the protrusion 31, forging and pressing at normal temperature, adhering a layer of foam aluminum layer 1 on the side surface of the protrusion 31 by using a high-temperature-resistant cement adhesive, and polishing the side surface and the bottom surface of the stainless steel pot smoothly.
To verify the inventive scheme, the following comparative examples were set:
test examples
Stainless steel pots were manufactured according to examples 1 to 3 and comparative examples 1 to 5, respectively, each set of stainless steel was filled with 2/3 volumes of clean water, heated in an induction cooker, the average noise during heating was detected, and the thermal efficiency g was calculated as g ═ [ (t1-t0) × m × c ]/[ p × t × 3600000], where t1 is the heating termination temperature of water, t0 is the initial temperature of water, m is the mass of water, c is the specific heat capacity of water, p is the output power of the induction cooker, t is the heating time of the induction cooker, and the amount of electricity used was converted into joules when calculating the energy output of the induction cooker; according to GB/T1768-1979, after grinding 200 circles by a grinding wheel under a weight of 250g, the weight loss is tested.
The experimental results are as follows:
| average noise (dB) | Abrasion resistance (. times.10) -4 g) | Thermal efficiency | |
| Example 1 | 52.32 | 45 | 96.47％ |
| Example 2 | 51.75 | 45 | 97.02％ |
| Example 3 | 54.62 | 47 | 97.40％ |
| Comparative example 1 | 67.73 | 45 | 91.20％ |
| Comparative example 2 | 67.53 | 46 | 96.96％ |
| Comparative example 3 | 63.76 | 45 | 95.15％ |
| Comparative example 4 | 64.02 | 47 | 96.10％ |
| Comparative example 7 | 55.27 | 56 | 95.84％ |
As can be seen from the table, the stainless steel cookware in the examples 1 to 3 using the method of the present invention has the advantages of good noise control effect, excellent wear resistance, good thermal efficiency and high practicability. When the stainless steel pot manufactured by the method is used, the average noise value is lower than 54.62dB, the wear resistance is lower than 0.0047g, and the thermal efficiency exceeds 96%.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (4)
1. The utility model provides an electromagnetic heating low noise stainless steel pan which characterized in that: comprises a stainless steel pot body (3), a magnetic conductive coating (2) and a foam aluminum layer (1); the bottom of the stainless steel pot body (3) is provided with a bulge (31), and the magnetic conductive coating (2) is adhered to the surface of the bulge (31); the foam aluminum layer (1) wraps the side face of the protrusion (31) and forms a flush bottom face with the protrusion (31); the stainless steel pot body (3) is prepared from the following raw materials in percentage by mass: 0.01-0.03% of carbon, 0.003-0.005% of rhenium, 0.01-0.02% of zinc, 1.3-1.8% of manganese, 0.012-0.033% of vanadium, 0.010-0.040% of zirconium, 0.013-0.016% of neodymium, 0.3-0.4% of porous ceramic, and the balance of Fe and inevitable impurities;
the porous ceramic is prepared from the following raw materials in parts by mass: 8-12 parts of silicon dioxide, 15-18 parts of silicon carbide, 1-3 parts of titanium dioxide, 5-8 parts of zirconium oxide, 10-15 parts of soluble fiber, 3-5 parts of hydrophilic polyurethane resin, 1-3 parts of starch, 3-5 parts of ammonium chloride and 1-2 parts of sodium dodecyl benzene sulfonate;
the preparation method of the electromagnetic heating low-noise stainless steel pot comprises the following steps:
(1) mixing soluble fiber with dilute hydrochloric acid solution 5-8 times of the weight of the soluble fiber, soaking for 10-15min, adding hydrophilic polyurethane resin, starch, ammonium chloride and sodium dodecyl benzene sulfonate, stirring for 20-30min, adding silicon dioxide, silicon carbide, titanium dioxide and zirconium oxide, mixing uniformly, and drying at 50-55 ℃ under 0.01-0.03 standard atmospheric pressure for 5-8 h; the mass fraction of the dilute hydrochloric acid solution is 0.1-0.3%;
(2) heating the mixture obtained in the last step to 1800-1900 ℃ under the protection of nitrogen, sintering for 8-10h, and processing the sintered ceramic into ultrafine powder by using an ultrafine pulverizer to obtain porous ceramic;
(3) mixing carbon, rhenium, zinc, manganese, vanadium, zirconium, neodymium and iron according to the mass ratio, pouring the mixture into a steelmaking furnace, vacuumizing the degree of vacuum of 0.1-0.5Pa, melting the raw materials, smelting for 3-5h, adjusting the temperature to 1600-1630 ℃, adding the porous ceramic prepared in the previous step, continuously smelting for 20-30min, casting into a casting belt with the thickness of 2-4mm, and continuously casting under the protection of argon;
(4) treating the casting belt obtained in the last step at 900-950 ℃ for 1-2h, pressing into a casting belt with the thickness of 1.5-1.8mm, and reducing the temperature to 600-630 ℃ by using a water cooling mode; spraying dilute sulfuric acid with the mass fraction of 0.02-0.05% on the surface of the casting belt, washing with deionized water for 2-4 times, heating the casting belt to 800-850 ℃ under the protection of argon, and preserving heat for 1-2 min;
(5) stamping the casting belt obtained in the last step into the stainless steel pot body (3), processing for 1-2h at 500-600 ℃, and polishing;
(6) and (2) performing sand blasting treatment on the bottom protrusion (31) of the stainless steel pot body (3), treating at the high temperature of 300-400 ℃ for 30-50s, spraying the magnetic conductive coating (2) on the bottom surface of the protrusion (31), forging and pressing at normal temperature, adhering a layer of foamed aluminum layer (1) on the side surface of the protrusion (31) by using a high-temperature-resistant cement adhesive, and polishing the side surface and the bottom surface of the stainless steel pot to be flat.
2. The electromagnetic heating low noise stainless steel pot of claim 1, characterized in that: the magnetic conductive coating (2) is a chromium-based iron alloy coating.
3. The electromagnetic heating low noise stainless steel pot of claim 1, characterized in that: the ratio of the bottom area of the foamed aluminum layer (1) to the bottom area of the protrusion (31) is 1: 10-11.
4. The electromagnetic heating low noise stainless steel pot of claim 1, characterized in that: the fineness of the porous ceramic is 80-100 nm.
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