CN115852355A - Cold spraying constant temperature titanium pot - Google Patents
Cold spraying constant temperature titanium pot Download PDFInfo
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Abstract
The invention discloses a cold spraying constant-temperature titanium pot which comprises a pot base body, a heat conducting coating, a constant-temperature magnetic conducting coating, a titanium-copper-iron composite coating and a titanium-silicon hydrophobic coating, wherein the heat conducting coating is cold sprayed on the outer surface of the bottom of the whole pot base body, and the constant-temperature magnetic conducting coating is cold sprayed on the surface of the heat conducting coating; the titanium-copper-iron composite coating is cold sprayed on the inner surface of the pot base body, and the titanium-silicon hydrophobic coating is cold sprayed on the surface of the titanium-copper-iron composite coating. The titanium pot coating prepared by the invention has the advantages of good bonding force, compact structure, low porosity, strong electromagnetic heating induction capability, good non-adhesiveness and wear resistance.
Description
Technical Field
The invention relates to the technical field of cookware production, in particular to a cold spraying constant-temperature titanium pot.
Background
Titanium does not contain heavy metal and has antibacterial activity, so titanium is regarded as a very good choice for cooking utensils and tableware, but pure titanium is low in hardness, poor in wear resistance and poor in heat conductivity, pots made of pure titanium are easy to scratch in the using process, meanwhile, the non-stick effect is poor when food is cooked, and titanium composite pots are usually made by rolling and compounding raw materials, the process cannot change the surface performance of a titanium material, and therefore, the technical problem to be solved is how to improve the titanium surface hardness and the food non-stick performance of the titanium-containing composite pots. In addition, pure titanium metal is expensive and can cause economic burdens on consumers.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a cold spraying constant temperature titanium pot, wherein a layer of heat conducting coating and a layer of constant temperature magnetic conducting coating are sprayed on the outer surface of the bottom of a pot base body, and a layer of titanium-copper-iron composite coating and a layer of titanium-silicon hydrophobic coating are sprayed on the inner layer of the pot, so that the pot can overcome the defects of low hardness, poor wear resistance, poor heat conductivity and the like of a pure titanium pot, and can realize good heat conducting effect and temperature control effect in the using process.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the invention provides a cold spraying constant-temperature titanium pot, wherein the titanium pot comprises a pot base body, a heat conducting coating, a constant-temperature magnetic conducting coating, a titanium-copper-iron composite coating and a titanium-silicon hydrophobic coating, the constant-temperature magnetic conducting coating is cold sprayed on the outer surface of the bottom of the whole pot base body, and the heat conducting coating is cold sprayed on the surface of the constant-temperature magnetic conducting coating; the titanium-copper-iron composite coating is cold sprayed on the inner surface of the pot base body, and the titanium-silicon hydrophobic coating is cold sprayed on the surface of the titanium-copper-iron composite coating.
The thickness of the heat conduction layer is 0.4-0.6 mm.
The thickness of the constant-temperature magnetic conductive coating is 0.4-0.6 mm.
The thickness of the titanium-copper-iron composite coating is 0.015 mm-0.035 mm.
The thickness of the titanium silicon hydrophobic coating is 0.015 mm-0.035 mm.
In a second aspect, the invention provides a preparation method of a cold spraying constant temperature titanium pot, which comprises the following preparation steps:
s1: a layer of heat-conducting coating is cold-sprayed on the outer surface of the bottom of the pot base body by using heat-conducting materials under low pressure;
s2, cold spraying a constant-temperature magnetic conduction coating on the surface of the heat conduction coating by using a constant-temperature magnetic conduction material under high pressure;
s3: micro forging;
s4: a layer of titanium-copper-iron composite coating is sprayed on the inner surface of the pot base body by using titanium-copper-iron powder at low pressure;
s5: a titanium silicon hydrophobic coating is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder under high pressure;
s6: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step S5;
s7: and (5) spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step (S6) and then drying.
In the step S1, the heat conduction material is copper powder with the grain diameter of 100-300 meshes.
In step S2, the Curie temperature of the constant-temperature magnetic conducting material is in the range of 180-260 ℃.
In the step S3, the micro forging and pressing means that the micro forging and pressing is carried out by using a hydraulic press and a pressure of 0.5-2 tons.
The constant-temperature magnetic conductive material is formed by mixing 50-60% of iron, 20-40% of nickel, 1-2% of cobalt, 3-10% of ferrosilicon alloy and 5-10% of 430% of stainless steel, and the particle size of the constant-temperature magnetic conductive material is 100-300 meshes.
The titanium-copper-iron powder is formed by mixing 50-80% of titanium, 20-50% of copper and 2-5% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The titanium-silicon powder is formed by mixing 15-40% of titanium and 60-85% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
In the step S1 and the step S4, the carrier gas pressure of the low-pressure cold spraying is 0.8-1.5 Mpa, the carrier gas temperature is 130-250 ℃, the powder speed is 540-680 m/S, and the spraying distance is 15-40 mm.
In the step S2 and the step S5, the carrier gas pressure of the high-pressure cold spraying is 2.8-3.8 Mpa, the carrier gas temperature is 410-550 ℃, the powder speed is 800-1180 m/S, and the spraying distance is 15-40 mm.
Compared with the prior art, the invention has the following advantages and effects:
because the heating source in actual cooking is generally only contacted with the outer surface of the bottom of the pot base body, the heat-conducting coating and the constant-temperature magnetic-conducting coating only need to be sprayed on the outer surface of the bottom of the pot base body, and the whole outer surface of the pot base body does not need to be sprayed, so that the use of the heat-conducting material and the constant-temperature magnetic-conducting material can be reduced under the condition of not influencing the cooking, the raw material cost is saved, and the preparation process is reduced. The titanium-copper-iron composite coating and the titanium-silicon hydrophobic coating need to be sprayed on the inner surface of the whole pot base body, so that the pot base body is prevented from being directly contacted with food.
The magnetic conductive coating prepared by utilizing the cold spraying technology at the bottom of the pot base body is obviously superior to the magnetic conductive coating prepared by utilizing the hot spraying technology, and under the condition of ensuring the thickness of a thinner coating (0.4-0.6 mm), the magnetic conductive coating has good bonding force, compact structure, low porosity, strong electromagnetic heating induction capability, high electromagnetic heating efficiency (the maximum power reaches 1500-2500W) and high magnetic conductivity of 93 percent, is expected to partially replace the prior aluminum alloy/composite stainless steel plate and a pot prepared by an aluminum alloy/stainless steel composite plate, obviously reduces the manufacturing cost of an IH heating pot, and can also achieve the similar purpose of quick and efficient electromagnetic heating; meanwhile, the magnetic conductive coating is made of a constant-temperature material, the constant-temperature material is coated at the outer bottom of the cooker, the cooker is heated on the induction cooker, and when the temperature rises to the Curie point of the constant-temperature material, the constant-temperature material loses magnetism and does not generate heat any more, so that the temperature control function can be achieved. The invention further adopts a micro forging technology, can assist in enhancing the structure density, reducing the particle gap, and then is sprayed with a titanium-copper-iron composite coating, so that the heat conduction and heat preservation effects can be achieved when the pot matrix (aluminum alloy) is initially isolated; the titanium silicon hydrophobic coating coated on the titanium copper iron composite coating not only has the function of strengthening the isolation with the pot matrix again and preventing aluminum from entering human bodies to harm health, but also can strengthen the non-stick effect of food during cooking and reduce the situations of bottom burning, scorching and the like of the food.
The coating is sprayed on the inner surface and the outer surface of the pot by adopting high-pressure and low-pressure superposed cold spraying, the sprayed powder has high deposition rate, high deposition efficiency and low powder oxidation degree, and the coating is ensured to have the characteristics of single tissue component, small heat affected zone and thermal stress, strong binding force, few internal defects and the like, and the high-pressure cold spraying can enable the coating to be better attached to the pot wall, and simultaneously, the gaps of the low-pressure cold spraying coating are filled and supplemented, so that the prepared coating has good adhesion, uniform coating structure and is not easy to fall off in the using process.
Drawings
Fig. 1 is a schematic view of a titanium pot of the present invention, wherein: 1-a pan base; 2-heat conducting coating, 3-constant temperature magnetic conducting coating; 4-titanium copper iron composite coating; 5-titanium silicon hydrophobic coating.
Fig. 2 is an enlarged cross-sectional view of a portion a of fig. 1, in which: 1-a pan base; 2-heat conducting coating, 3-constant temperature magnetic conducting coating; 4-titanium copper iron composite coating; 5-titanium silicon hydrophobic coating.
Detailed Description
The technical solutions in the examples will be clearly and completely described below. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Example 1
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 250 ℃, and the carrier gas pressure is 1.2MPa; the spraying distance was 30mm and the powder speed was 600m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 550 ℃, and the carrier gas pressure is 3.2MPa; the spraying distance was 30mm and the powder speed was 980m/s.
The constant-temperature magnetic conductive material is formed by mixing 50% of iron, 38% of nickel, 2% of cobalt, 5% of ferrosilicon alloy and 5% of 430% of stainless steel, and the particle size of the constant-temperature magnetic conductive material is 100-300 meshes.
c: micro forging is performed using a hydraulic press using a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body in a low-pressure cold mode, wherein the particle size of the titanium-copper-iron composite coating is 100-300 meshes; the titanium-copper-iron powder is formed by mixing 75% of titanium, 20% of copper and 5% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 250 ℃, and the carrier gas pressure is 1.2MPa; the spraying distance was 30mm and the powder speed was 600m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 15% of titanium and 85% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 550 ℃, and the carrier gas pressure is 3.2MPa; the spraying distance was 30mm and the powder speed was 980m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Example 2
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 230 ℃, and the carrier gas pressure is 1.5MPa; the spraying distance was 20mm and the powder speed was 680m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 430 ℃, and the carrier gas pressure is 3.8MPa; the spraying distance was 20mm and the powder speed was 1180m/s.
The constant-temperature magnetic conductive material is formed by mixing 55% of iron, 35% of nickel, 1% of cobalt, 3% of iron-silicon alloy and 6% of 430% of stainless steel, and the particle size of the constant-temperature magnetic conductive material is 100-300 meshes.
c: micro forging is performed using a hydraulic press using a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body in a low-pressure cold mode, wherein the particle size of the titanium-copper-iron composite coating is 100-300 meshes; the titanium-copper-iron powder is formed by mixing 50% of titanium, 48% of copper and 2% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 230 ℃, and the carrier gas pressure is 1.5MPa; the spraying distance was 20mm and the powder speed was 680m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 40% of titanium and 60% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 430 ℃, and the carrier gas pressure is 3.8MPa; the spraying distance was 20mm and the powder speed was 1180m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Example 3
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the temperature of carrier gas is 210 ℃, and the pressure of carrier gas is 0.8MPa; the spraying distance was 15mm and the powder speed was 540m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 410 ℃, and the carrier gas pressure is 2.8MPa; the spraying distance was 15mm and the powder speed was 800m/s.
The constant-temperature magnetic conductive material is formed by mixing 60% of iron, 20% of nickel, 2% of cobalt, 10% of iron-silicon alloy and 8% of 430% of stainless steel, and the particle size of the constant-temperature magnetic conductive material is 100-300 meshes.
c: micro forging is performed using a hydraulic press using a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body in a low-pressure cold mode, wherein the particle size of the titanium-copper-iron composite coating is 100-300 meshes; the titanium copper iron powder is formed by mixing 60% of titanium, 37% of copper and 3% of iron, and the particle size of the titanium copper iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the temperature of the carrier gas is 210 ℃, and the pressure of the carrier gas is 0.8MPa; the spraying distance was 15mm and the powder speed was 540m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 35% of titanium and 65% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 410 ℃, and the carrier gas pressure is 2.8MPa; the spraying distance is 15mm, and the powder speed is 800m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Example 4
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 190 ℃, and the carrier gas pressure is 1.3MPa; the spraying distance was 40mm and the powder speed was 620m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 490 ℃, and the carrier gas pressure is 3.6MPa; the spraying distance was 40mm and the powder speed was 1130m/s.
The constant temperature magnetic conductive material is formed by mixing 58 percent of iron, 28 percent of nickel, 2 percent of cobalt, 5 percent of ferrosilicon alloy and 7 percent of 430 stainless steel, and the grain diameter of the constant temperature magnetic conductive material is 100-300 meshes.
c: micro forging is carried out by a hydraulic press with a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body by using titanium-copper-iron powder with the particle size of 100-300 meshes in a low-pressure cold spraying manner; the titanium-copper-iron powder is formed by mixing 55% of titanium, 40% of copper and 5% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 190 ℃, and the carrier gas pressure is 1.3MPa; the spraying distance was 40mm and the powder speed was 620m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 20% of titanium and 80% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 490 ℃, and the carrier gas pressure is 3.6MPa; the spraying distance was 40mm and the powder speed was 1130m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Example 5
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 170 ℃, and the carrier gas pressure is 1.4MPa; the spraying distance was 25mm and the powder speed was 660m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 470 ℃, and the carrier gas pressure is 3.2MPa; the spraying distance was 25mm and the powder speed was 910m/s.
The constant-temperature magnetic conductive material is formed by mixing 54 percent of iron, 30 percent of nickel, 1.5 percent of cobalt, 5 percent of ferrosilicon alloy and 9.5 percent of 430 stainless steel, and the particle size of the constant-temperature magnetic conductive material is 100-300 meshes.
c: micro forging is performed using a hydraulic press using a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body in a low-pressure cold mode, wherein the particle size of the titanium-copper-iron composite coating is 100-300 meshes; the titanium-copper-iron powder is formed by mixing 70% of titanium, 26% of copper and 4% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 170 ℃, and the carrier gas pressure is 1.4MPa; the spraying distance was 25mm and the powder speed was 660m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 15% of titanium and 85% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 470 ℃, and the carrier gas pressure is 3.2MPa; the spraying distance was 25mm and the powder speed was 910m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Example 6
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 150 ℃, and the carrier gas pressure is 1MPa; the spraying distance was 35mm and the powder speed was 580m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 450 ℃, and the carrier gas pressure is 3MPa; the spraying distance was 35mm and the powder speed was 860m/s.
The constant temperature magnetic conductive material is formed by mixing 50 percent of iron, 28 percent of nickel, 2 percent of cobalt, 10 percent of ferrosilicon alloy and 10 percent of 430 stainless steel, and the grain diameter of the constant temperature magnetic conductive material is 100-300 meshes.
c: micro forging is performed using a hydraulic press using a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body in a low-pressure cold mode, wherein the particle size of the titanium-copper-iron composite coating is 100-300 meshes; the titanium-copper-iron powder is formed by mixing 45% of titanium, 50% of copper and 5% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 150 ℃, and the carrier gas pressure is 1MPa; the spraying distance was 35mm and the powder speed was 580m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 30% of titanium and 70% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 450 ℃, and the carrier gas pressure is 3MPa; the spraying distance was 35mm and the powder speed was 860m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Example 7
The embodiment provides a preparation method of a cold spraying constant-temperature titanium pot, which comprises the following steps:
a: copper powder with the grain diameter of 100-300 meshes is used for cold spraying a copper coating with the thickness of 0.5 mm on the outer surface of the bottom of the aluminum alloy pot matrix at low pressure.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 130 ℃, and the carrier gas pressure is 1.4MPa; the spraying distance was 25mm and the powder speed was 670m/s.
b, using constant temperature magnetic conductive material with the grain diameter of 100-300 meshes to perform high-pressure cold spraying on the surface of the copper coating to form a constant temperature magnetic coating with the thickness of 0.5 mm.
The Curie temperature of the constant-temperature magnetic conductive material is in the range of 180-260 ℃.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 430 ℃, and the carrier gas pressure is 3.3MPa; the spraying distance was 25mm and the powder speed was 930m/s.
The constant-temperature magnetic conductive material is formed by mixing 60% of iron, 25% of nickel, 1% of cobalt, 8% of iron-silicon alloy and 6% of 430% of stainless steel, and the particle size of the constant-temperature magnetic conductive material is 100-300 meshes.
c: micro forging is performed using a hydraulic press using a pressure of 0.5 to 2 tons.
d: a titanium-copper-iron composite coating with the thickness of 0.025 mm is sprayed on the inner surface of the pot base body in a low-pressure cold mode, wherein the particle size of the titanium-copper-iron composite coating is 100-300 meshes; the titanium-copper-iron powder is formed by mixing 63% of titanium, 35% of copper and 2% of iron, and the particle size of the titanium-copper-iron powder is 100-300 meshes.
The parameters of low-pressure cold spraying are set as follows: the carrier gas temperature is 130 ℃, and the carrier gas pressure is 1.4MPa; the spraying distance is 25mm, and the powder speed is 670m/s.
e: a titanium silicon hydrophobic coating with the thickness of 0.025 mm is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder with the grain size of 100-300 meshes under high pressure and cold spraying; the titanium-silicon powder is formed by mixing 25% of titanium and 75% of hydrophobic silicon dioxide powder, and the particle size of the titanium-silicon powder is 100-300 meshes.
The parameters of high-pressure cold spraying are set as follows: the carrier gas temperature is 430 ℃, and the carrier gas pressure is 3.3MPa; the spraying distance was 25mm and the powder velocity was 930m/s.
f: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step e;
g: and f, spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step f, and drying.
Comparative example 1
The comparative example provides a manufacturing method of a pot, the manufacturing method and the steps are the same as those of the embodiment 1, and the difference is that a low-pressure cold spraying technology is used when the constant-temperature magnetic conducting pattern layer and the titanium silicon hydrophobic coating are sprayed, and the parameters of the low-pressure cold spraying technology are as follows: the carrier gas temperature is 250 ℃, the carrier gas pressure is 1.2MPa, the spraying distance is 30mm, and the powder speed is 600m/s.
The microhardness of 7 points of each of the titanium silicon hydrophobic coatings on the inner surface of each of the titanium pots prepared in examples 1 to 7 was measured, and the microhardness of 7 points of each of the titanium pots and the average value of the microhardness are shown in Table 3.
TABLE 3 microhardness (HV) 0.1 )
The first test example: non-sticking property test of fried egg
Omelette non-stick testing was performed according to GB/T32095.2-2015 using the pots prepared in examples 1-7 and commercially available stainless steel pots, teflon coated non-stick pots, pure titanium pots, clad titanium pots. The test results are shown in table 4.
TABLE 4 Fried egg test results
Test example two: baked cake test
The baked cake non-stick test was performed according to GB/T32095.2-2015 using the pots prepared in examples 1-7 and commercially available stainless steel pots, teflon coated non-stick pots, pure titanium pots, and clad titanium pots. The test results are shown in table 5.
Table 5 baked cake test results
Test example three: boiled water comparison test
A comparison test of thermal efficiency and magnetic conductivity of the pot is carried out by using a water boiling mode, the pot prepared in the embodiment 1-7 and a commercially available iron pot, a stainless steel pot, a starry bottom pot and a melting injection bottom pot are taken, all the specifications of the pots are phi 24x13.5, 1000g of normal temperature water is respectively injected into all the pots, an induction cooker is used for boiling water at the power of 800W, and the thermal conductivity can be reflected by the time of boiling water. The test results are shown in table 7.
TABLE 6 thermal conductivity of various substrates
| Material of | Thermal conductivity w/m.k |
| Iron (II) | 80 |
| Stainless steel | 36 |
| Aluminium | 237 |
| Copper (Cu) | 401 |
| Titanium (IV) | 15.2 |
TABLE 7 Water boil duration
Comparative example 1 only uses the low-pressure cold spraying technology, and the cookware prepared by the comparative example 1 has lower magnetic efficiency than that of the cookware in example 1 because the low-pressure cold spraying technology causes poor density, poor binding force and poor performance of the coating of the thermostatic material.
Test example four: antibacterial property test
After one week of bacterial culture using the resin substrate, the general stainless steel substrate, and the pots prepared in examples 1 to 7, the antibacterial ratio was recorded, and the antibacterial results are shown in table 8.
TABLE 8 antibacterial results
Test example five: abrasion resistance test
The pan prepared in examples 1-7 and a commercially available teflon coated non-stick pan were subjected to abrasion resistance testing. The test results are shown in table 9.
TABLE 9 abrasion resistance test results
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The cold spraying constant-temperature titanium pot is characterized by comprising a pot base body, a heat conduction layer, a constant-temperature magnetic conduction coating, a titanium-copper-iron composite coating and a titanium-silicon hydrophobic coating, wherein the heat conduction coating is cold sprayed on the outer surface of the bottom of the whole pot base body, and the constant-temperature magnetic conduction coating is cold sprayed on the surface of the heat conduction coating; the titanium-copper-iron composite coating is cold sprayed on the inner surface of the pot base body, and the titanium-silicon hydrophobic coating is cold sprayed on the surface of the titanium-copper-iron composite coating.
2. The titanium pot of claim 1, wherein the thermally conductive coating has a thickness of 0.4 mm to 0.6 mm; the thickness of the constant-temperature magnetic conductive coating is 0.4-0.6 mm; the thickness of the titanium-copper-iron composite coating is 0.015-0.035 mm; the thickness of the titanium silicon hydrophobic coating is 0.015-0.035 mm.
3. A method of making the cold spray constant temperature titanium pan of claim 1, comprising the steps of:
s1: a layer of heat-conducting coating is cold-sprayed on the outer surface of the bottom of the pot base body by using heat-conducting material under low pressure;
s2, cold spraying a constant-temperature magnetic conduction coating on the surface of the heat conduction coating by using a constant-temperature magnetic conduction material under high pressure;
s3: micro forging and pressing;
s4: a layer of titanium-copper-iron composite coating is sprayed on the inner surface of the pot base body by using titanium-copper-iron powder at low pressure;
s5: a titanium silicon hydrophobic coating is sprayed on the surface of the titanium copper iron composite coating by using titanium silicon powder under high pressure;
s6: sanding, cleaning and drying the inner and outer surfaces of the pot prepared in the step S5;
s7: and (5) spraying a layer of high-temperature coating on the outer surface of the pot obtained in the step (S6) and then drying.
4. The method according to claim 3, wherein in step S1, the heat conducting material is copper powder with a particle size of 100-300 meshes.
5. The method according to claim 3, wherein in step S2, the Curie temperature of the constant temperature magnetic permeable material is in the range of 180-260 ℃.
6. The method as claimed in claim 3, wherein the constant temperature magnetic permeable material is prepared by mixing 50-60% iron, 20-40% nickel, 1-2% cobalt, 3-10% ferrosilicon, 5-10% 430% stainless steel, and has a particle size of 100-300 mesh.
7. The method as claimed in claim 3, wherein the powder of titanium-copper-iron is formed by mixing 50-80% of titanium, 20-50% of copper and 2-5% of iron, and the particle size of the powder of titanium-copper-iron is 100-300 meshes.
8. The method as claimed in claim 3, wherein the titanium silicon powder is prepared by mixing 15-40% of titanium and 60-85% of hydrophobic silica powder, and the particle size of the titanium silicon powder is 100-300 meshes.
9. The method of claim 3, wherein the carrier gas pressure of the low pressure cold spray is 0.8 to 1.5MPa, the carrier gas temperature is 130 to 250 ℃, the powder velocity is 540 to 680m/S, and the spray distance is 15 to 40mm in step S1 and step S4.
10. The method of claim 3, wherein in the steps S2 and S5, the carrier gas pressure of the high-pressure cold spraying is 2.8-3.8 Mpa, the carrier gas temperature is 410-550 ℃, the powder speed is 800-1180 m/S, and the spraying distance is 15-40 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211613263.0A CN115852355A (en) | 2022-12-15 | 2022-12-15 | Cold spraying constant temperature titanium pot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211613263.0A CN115852355A (en) | 2022-12-15 | 2022-12-15 | Cold spraying constant temperature titanium pot |
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| Publication Number | Publication Date |
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| CN115852355A true CN115852355A (en) | 2023-03-28 |
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|---|---|---|---|
| CN202211613263.0A Pending CN115852355A (en) | 2022-12-15 | 2022-12-15 | Cold spraying constant temperature titanium pot |
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| Country | Link |
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| CN (1) | CN115852355A (en) |
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