CN109943799A - A kind of heating utensil and preparation method thereof - Google Patents
A kind of heating utensil and preparation method thereof Download PDFInfo
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- CN109943799A CN109943799A CN201711354053.3A CN201711354053A CN109943799A CN 109943799 A CN109943799 A CN 109943799A CN 201711354053 A CN201711354053 A CN 201711354053A CN 109943799 A CN109943799 A CN 109943799A
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Abstract
The present invention relates to cooking apparatus fields, more particularly to a kind of heating utensil and preparation method thereof.The heating utensil includes: the substrate (1) being heated and the non-sticking lining (3) that is formed on the substrate (1) upper surface；Wherein, the non-sticking lining (3) is to pass through the coating that thermal spraying is formed by the mixture containing fluororesin and metallic aluminium, contained essential element is Al, O, F and C in coating, the porosity of the non-sticking lining (3) is 0.5-6%, the binding force of coating and substrate is 20-50MPa, and moistened surface angle is 100-150 °.Heating utensil of the present invention surface hardness with higher and coating binding force, and corrosion resistance and good, scraping and wiping resistance performance are good, durability of cooking is good.
Description
Technical field
The present invention relates to cooking apparatus fields, more particularly to a kind of heating utensil and preparation method thereof.
Background technique
Currently, having used non-sticking lining in electric cooker, inner container of electric pressure cooker to realize the function easy to clean of cookware, do not glue
Coating is generally divided into organic fluorine or the inorganic non-sticky coating of ceramics, and existing fluororesin, ceramic non-stick coating are mostly
It is prepared using air pressure spraying or electrostatic spraying mode, these traditional preparation methods, which have, can be mass, and make
The advantages that standby high-efficient, but also have disadvantages that, such as: as compressed air spraying using obtained by high temperature sintering preparation process
Coating binding force is lower, film layer generally cannot too thick (20-50um), surface hardness is low, scraping and wiping resistance performance is poor, and coating is using
In the process easily there are the failure phenomenons such as coating shedding, blistering in (user cook process), so influence electric cooker, electric pressure cooking saucepan makes
Use the service life.The PFA non-sticking lining prepared additionally by electrostatic spraying, compactness is preferable, but coating surface hardness is too low, resistance to
Scratch performance is poor, and cooking process is easy to scratch and fail.Another non-sticky coating of ceramics, the coating are also using air pressure
Prepared by the mode of power spraying, the coating is high relative to fluor resin coating hardness, and wearability is good, but ceramic non-stick coating
Corrosion resisting property is low, and non-adhesion behavior will decline after a period of use, influences consumer experience.
CN105316619A is disclosed and is prepared ceramic coating by plasma spraying, and prepares surface by flame-spraying
PTFE non-sticking lining, the associativity between the PTFE layer being prepared and ceramic layer is poor, and flame spray coating rough surface
It spends larger, although may have hydrophobicity, is not suitable on electric cooker, inner tub of pressure cooker, and surface PTFE hydrophobic layer
Wearability it is still poor.
Summary of the invention
The purpose of the invention is to overcome in non-stick pan of the existing technology non-sticking lining and substrate associativity it is poor,
The problems such as wearability is poor provides a kind of heating utensil and preparation method thereof.
To achieve the goals above, one aspect of the present invention provides a kind of heating utensil, which includes:
The substrate being heated；And
The non-sticking lining being formed on the substrate on surface；
Wherein, the non-sticking lining is to pass through the coating that thermal spraying is formed by the mixture containing fluororesin and metallic aluminium,
Contained essential element is Al, O, F and C in coating, and the porosity of the non-sticking lining is 0.5-6%, the combination of coating and substrate
Power is 20-50MPa, and moistened surface angle is 100-150 °.
Preferably, the non-sticking lining with a thickness of 20-200 μm, roughness is that Ra is 0.5-3 μm.
Preferably, in the mixture containing fluororesin and metallic aluminium, the content of the fluororesin is 50-80 weight
% is measured, the content of the metallic aluminium is 20-50 weight %.
Preferably, the fluororesin is PFA (tetrafluoroethylene-perfluoro propyl ethylene copolymer, also known as soluble polytetrafluoroethyl-ne
Alkene).
Preferably, the non-sticking lining is formed by plasma spraying method.In this case, the hole of the non-sticking lining
Gap rate is 3-6%, and the binding force of coating and substrate is 20-40MPa.
Preferably, the non-sticking lining is formed by supersonic flame spraying method.In this case, the non-sticking lining
Porosity be 0.5-3%, the binding force of coating and substrate is 30-50MPa.
Preferably, the heating utensil is inner container of electric cooker, inner tub of pressure cooker, frying pan, baking tray or cooking machine.
Second aspect of the present invention provides a kind of method for preparing above-mentioned heating utensil, this method comprises: using fluorine is contained
Non-sticking lining is formed on the substrate by hot spray process in the mixture of resin and metallic aluminium.
Preferably, the method also includes: before implementing thermal spraying, to the substrate carry out roughening treatment so that institute
It is 3-10 μm that the surface roughness for stating substrate, which reaches Ra,.
Preferably, the hot spray process is plasma spraying, and the technological parameter of the plasma spraying includes: spray distance
For 80-120mm, spray voltage 50-80V, spraying current 300-500A, spray distance 50-150mm, powder feeding rate is
20-50g/min, H2Flow is 3-5L/min, and Ar flow is 50-60L/min, and spray gun speed is 60-300mm/s.
Preferably, the hot spray process is supersonic flame spraying, and the technological parameter of the supersonic flame spraying includes:
Kerosene oil flow is 18-20L/min, oxygen flow 800-1000L/min, nitrogen flow 2-5L/min, argon flow 5-
10L/min, powder feeding rate 20-40g/min, spray distance 300-400mm.
In heating utensil of the present invention, non-sticking lining has good hydrophobic scratch resistance non-stick, higher
Energy, good corrosion resisting property, and non-sticking lining and substrate bond strength are higher.
Detailed description of the invention
Fig. 1 is the schematic diagram of a layer structure of heating utensil of the present invention；
Fig. 2 is photo of the non-sticking lining of heating utensil of the present invention when detecting moistened surface angle.
Description of symbols
1 substrate, 3 non-sticking lining
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower " is typically referred to reference to attached
It is upper and lower shown in figure；" inside and outside " refers to the inside and outside of the profile relative to each component itself.
As shown in Figure 1, heating utensil of the present invention includes:
The substrate 1 being heated；And
The non-sticking lining 3 being formed on 1 upper surface of substrate.
In the present invention, the non-sticking lining 3 is to be formed by the mixture containing fluororesin and metallic aluminium by thermal spraying
Coating, contained essential element is Al, O, F and C in coating.The implementation method of the thermal spraying can be the heat of this field routine
Spray coating method.In the preferred case, the hot spray process is plasma spraying method or supersonic flame spraying method.Passing through thermal spraying
During method forms non-sticking lining, part metals aluminium can aoxidize to form aluminium oxide, so that including gold in the non-sticking lining formed
Belong to aluminium, aluminium oxide and PFA.
In the present invention, in the mixture containing fluororesin and metallic aluminium, the content of the fluororesin can be
50-80 weight %, preferably 60-70 weight %；The content of the metallic aluminium can be 20-50 weight %, preferably 30-40 weight
Measure %.
In the present invention, the fluororesin can be the conventional selection of this field.In the preferred case, the fluororesin is
PFA and PTFE.Most preferably, the fluororesin is PFA.
In the mixture containing fluororesin and metallic aluminium, the fluororesin usually uses in the form of a powder.PFA
The average grain diameter of powder can be 5-80 μm, preferably 10-50 μm.
In the mixture containing fluororesin and metallic aluminium, the metallic aluminium usually uses in the form of a powder.Gold
The average grain diameter for belonging to aluminium powder can be 5-100 μm, preferably 20-60 μm.
In the present invention, the porosity of the non-sticking lining 3 is 0.5-6%, specifically for example can for 0.5%, 0.8%,
1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, 3%, 3.2%, 3.5%, 3.8%, 4%, 4.2%,
4.5%, 4.8%, 5%, 5.2%, 5.5%, 5.8%, 6% etc.；The binding force of coating and substrate is 20-50MPa, specifically for example
Can for 20MPa, 22MPa, 25MPa, 28MPa, 30MPa, 32MPa, 35MPa, 38MPa, 40MPa, 42MPa, 45MPa,
48MPa, 50MPa etc.；Moistened surface angle be 100-150 ° (schematic diagram is as shown in Figure 2), specifically for example can for 100 °, 110 °,
120 °, 130 °, 140 °, 150 ° etc..When the non-sticking lining 3 is formed by plasma spraying method, the hole of the non-sticking lining 3
Gap rate is 3-6%, and the binding force of coating and substrate is 20-40MPa.When the non-sticking lining 3 passes through supersonic flame spraying method
When formation, the porosity of the non-sticking lining 3 is 0.5-3%, and the binding force of coating and substrate is 30-50MPa.
In the present invention, the thickness of the non-sticking lining 3 can be 20-200 μm, specifically, such as can be 20 μm, 40
μm, 60 μm, 80 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, any two institute structure in 200 μm and these point values
At range in arbitrary value.
In the present invention, it is 0.5-3 μm that the roughness of the non-sticking lining 3, which can be Ra, specifically, such as can be
0.5μm、0.6μm、0.7μm、0.8μm、0.9μm、1μm、1.1μm、1.2μm、1.3μm、1.4μm、1.5μm、1.6μm、1.7μm、
1.8 μm, 1.9 μm, 2 μm, 2.1 μm, 2.2 μm, 2.3 μm, 2.4 μm, 2.5 μm, 2.6 μm, 2.7 μm, 2.8 μm, 2.9 μm, 3 μm and
The arbitrary value in range that any two in these point values are constituted.
In the present invention, the material of the substrate can be the metal materials such as stainless steel, aluminium, aluminium alloy, titanium alloy, pottery
Porcelain, glass or multilayer (including bilayer and three layers or more) metallic composite.Wherein, multi-layer metal composite material can be for not
Become rusty steel/aluminium, stainless steel/copper, stainless steel/aluminium/copper etc..The thickness of the substrate can be 0.5-6mm.
In the present invention, the heating utensil can be inner container of electric cooker, inner tub of pressure cooker, frying pan, baking tray or cooking machine.
The preparation method of heating utensil of the present invention includes: to be passed through using the mixture containing fluororesin and metallic aluminium
Hot spray process forms non-sticking lining 3 on the base 1.
In the present invention, the preparation method of the heating utensil can also include: before implementing thermal spraying, to the base
Bottom 1 carries out roughening treatment, so that it is 3-10 μm that the surface roughness of the substrate 1, which reaches Ra, it specifically for example can be 3 μm, 3.5
μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, 9.5 μm, 10 μm etc..
In the present invention, the method for the roughening treatment can be this field conventional selection, such as can with and at sandblasting
Reason.The method of the blasting treatment includes: sand grains (such as glass sand, brown steel sand, the black brown jade, white fused alumina, gold using 60-150 mesh
Emery etc.), control Jet Stream pressure is 0.2-0.9MPa.
In the present invention, the preparation method of the heating utensil can also include: before implementing thermal spraying and to be roughened
After processing, the pre-heat treatment is carried out to substrate surface, such as substrate surface can be preheated to 90-200 DEG C.
In the present invention, the hot spray process can be the conventional selection of this field, such as plasma spraying method or supersonic speed
Flame spraying.The technological parameter of the plasma spraying may include: that spray distance is 80-120mm, spray voltage 50-
80V, spraying current 300-500A, spray distance 50-150mm, powder feeding rate 20-50g/min, H2Flow is 3-5L/
Min, Ar flow are 50-60L/min, and spray gun speed is 60-300mm/s.The technological parameter of the supersonic flame spraying can be with
Include: kerosene oil flow be 18-20L/min, oxygen flow 800-1000L/min, nitrogen flow 2-5L/min, argon flow
For 5-10L/min, powder feeding rate 20-40g/min, spray distance 300-400mm.
The present invention will be described in detail by way of examples below.
In following preparation example and embodiment, unless otherwise instructed, each material used is commercially available.
PFA powder is purchased from Dajin Fluorine Coating (Shanghai) Co., Ltd., and average grain diameter is 15 μm.
Metallic aluminium powder is purchased from Beijing Sang Yao Science and Technology Development Co., Ltd., and average grain diameter is 30 μm.
Embodiment 1
(1) aluminum pot matrix is pre-processed, wherein pretreated method includes: a) oil removing 8 minutes at a temperature of 55 DEG C；
B) it is cleaned with deionized water；C) 100 DEG C of drying 5min；D) the brown steel sand for using 60-80 mesh, in the Jet Stream pressure of 0.6MPa
Under blasting treatment is carried out to aluminum pot matrix surface its surface roughness Ra is made to be 3 μm, then with air-flow by pot body matrix surface
Remaining powder particle is blown clean；E) with the NaOH solution of 40 weight % at 80 DEG C alkali cleaning 1 minute；F) with the nitre of 20 weight %
In acid solution and 3 minutes；G) it after being cleaned with deionized water, is dried 12 minutes at 300 DEG C；
(2) matrix surface that step (1) obtains is preheated to 150 DEG C；
(3) the PFA powder of 3 parts by weight and the metallic aluminium powder of 1 parts by weight are mixed, and is carried out with obtained mixed powder
Plasma spraying processing, to form non-sticking lining (with a thickness of 100 μm, roughness is that Ra is 2.8 μm) on the upper surface of matrix,
Wherein, it is 100mm, spray voltage 70V, spraying current 400A, spray that the condition of plasma spraying processing, which includes: spray distance,
Applying distance is 100mm, powder feeding rate 35g/min, H2Flow is 4L/min, and Ar flow is 55L/min, and spray gun speed is
200mm/s。
Comparative example 1
Cookware is prepared according to the method for embodiment 1, the difference is that not using metal during preparing non-sticking lining
Aluminium powder, and directly non-sticking lining is formed using electrostatic spraying PFA powder.
Embodiment 2
(1) stainless-steel pan matrix is pre-processed, wherein pretreated method includes: a) oil removing 8 at a temperature of 55 DEG C
Minute；B) it is cleaned with deionized water；C) 100 DEG C of drying 5min；D) the brown steel sand for using 60-80 mesh, in the jet gas of 0.8MPa
Carrying out blasting treatment to stainless-steel pan matrix surface under flowing pressure makes its surface roughness Ra be 8 μm, then with air-flow by pot
The remaining powder particle of body matrix surface is blown clean；E) with the NaOH solution of 40 weight % at 80 DEG C alkali cleaning 1 minute；F) with 20
In the nitric acid solution of weight % and 3 minutes；G) it after being cleaned with deionized water, is dried 11 minutes at 375 DEG C；
(2) matrix surface that step (1) obtains is preheated to 100 DEG C；
(3) the PFA powder of 3 parts by weight and the metallic aluminium powder of 1 parts by weight are mixed, and is carried out with obtained mixed powder
Plasma spraying processing, to form non-sticking lining (with a thickness of 150 μm, roughness is that Ra is 2.5 μm) on the upper surface of matrix,
Wherein, it is 120mm, spray voltage 50V, spraying current 300A, spray that the condition of plasma spraying processing, which includes: spray distance,
Applying distance is 50mm, powder feeding rate 20g/min, H2Flow is 3L/min, and Ar flow is 50L/min, and spray gun speed is
100mm/s。
Embodiment 3
(1) stainless-steel pan matrix is pre-processed, wherein pretreated method includes: a) oil removing 8 at a temperature of 55 DEG C
Minute；B) it is cleaned with deionized water；C) 100 DEG C of drying 5min；D) the brown steel sand for using 60-80 mesh, in the jet gas of 0.8MPa
Carrying out blasting treatment to stainless-steel pan matrix surface under flowing pressure makes its surface roughness Ra be 5 μm, then with air-flow by pot
The remaining powder particle of body matrix surface is blown clean；E) with the NaOH solution of 40 weight % at 80 DEG C alkali cleaning 1 minute；F) with 20
In the nitric acid solution of weight % and 3 minutes；G) it after being cleaned with deionized water, is dried 10 minutes at 450 DEG C；
(2) matrix surface that step (1) obtains is preheated to 180 DEG C；
(3) the PFA powder of 3 parts by weight and the metallic aluminium powder of 1 parts by weight are mixed, and is carried out with obtained mixed powder
Plasma spraying processing, to form non-sticking lining (with a thickness of 180 μm, roughness is that Ra is 2.2 μm) on the upper surface of matrix,
Wherein, it is 80mm, spray voltage 80V, spraying current 500A, spray that the condition of plasma spraying processing, which includes: spray distance,
Applying distance is 150mm, powder feeding rate 50g/min, H2Flow is 5L/min, and Ar flow is 60L/min, and spray gun speed is
280mm/s。
Embodiment 4
(1) aluminum pot matrix is pre-processed, wherein pretreated method includes: a) oil removing 8 minutes at a temperature of 55 DEG C；
B) it is cleaned with deionized water；C) 100 DEG C of drying 5min；D) the brown steel sand for using 60-80 mesh, in the Jet Stream pressure of 0.6MPa
Under blasting treatment is carried out to aluminum pot matrix surface its surface roughness Ra is made to be 3 μm, then with air-flow by pot body matrix surface
Remaining powder particle is blown clean；E) with the NaOH solution of 40 weight % at 80 DEG C alkali cleaning 1 minute；F) with the nitre of 20 weight %
In acid solution and 3 minutes；G) it after being cleaned with deionized water, is dried 12 minutes at 300 DEG C；
(2) matrix surface that step (1) obtains is preheated to 150 DEG C；
(3) the PFA powder of 3 parts by weight and the metallic aluminium powder of 1 parts by weight are mixed, and is carried out with obtained mixed powder
Supersonic flame spraying processing, to form non-sticking lining on the upper surface of matrix, (with a thickness of 100 μm, roughness is that Ra is 1 μ
M), wherein the condition of supersonic flame spraying processing includes: that kerosene oil flow is 19L/min, oxygen flow 900L/min, nitrogen
Throughput is 4L/min, argon flow 8L/min, powder feeding rate 30g/min, spray distance 350mm.
Comparative example 2
Cookware is prepared according to the method for embodiment 4, the difference is that not using metal during preparing non-sticking lining
Aluminium powder, and directly non-sticking lining is formed using electrostatic spraying PFA powder.
Embodiment 5
(1) stainless-steel pan matrix is pre-processed, wherein pretreated method includes: a) oil removing 8 at a temperature of 55 DEG C
Minute；B) it is cleaned with deionized water；C) 100 DEG C of drying 5min；D) the brown steel sand for using 60-80 mesh, in the jet gas of 0.8MPa
Carrying out blasting treatment to stainless-steel pan matrix surface under flowing pressure makes its surface roughness Ra be 8 μm, then with air-flow by pot
The remaining powder particle of body matrix surface is blown clean；E) with the NaOH solution of 40 weight % at 80 DEG C alkali cleaning 1 minute；F) with 20
In the nitric acid solution of weight % and 3 minutes；G) it after being cleaned with deionized water, is dried 11 minutes at 375 DEG C；
(2) matrix surface that step (1) obtains is preheated to 100 DEG C；
(3) the PFA powder of 3 parts by weight and the metallic aluminium powder of 1 parts by weight are mixed, and is carried out with obtained mixed powder
Supersonic flame spraying processing, to form non-sticking lining on the upper surface of matrix, (with a thickness of 150 μm, roughness is that Ra is 0.8
μm), wherein the condition of supersonic flame spraying processing includes: that kerosene oil flow is 18L/min, oxygen flow 800L/min, nitrogen
Throughput is 2L/min, argon flow 5L/min, powder feeding rate 20g/min, spray distance 300mm.
Embodiment 6
(1) stainless-steel pan matrix is pre-processed, wherein pretreated method includes: a) oil removing 8 at a temperature of 55 DEG C
Minute；B) it is cleaned with deionized water；C) 100 DEG C of drying 5min；D) the brown steel sand for using 60-80 mesh, in the jet gas of 0.8MPa
Carrying out blasting treatment to stainless-steel pan matrix surface under flowing pressure makes its surface roughness Ra be 5 μm, then with air-flow by pot
The remaining powder particle of body matrix surface is blown clean；E) with the NaOH solution of 40 weight % at 80 DEG C alkali cleaning 1 minute；F) with 20
In the nitric acid solution of weight % and 3 minutes；G) it after being cleaned with deionized water, is dried 10 minutes at 450 DEG C；
(2) matrix surface that step (1) obtains is preheated to 180 DEG C；
(3) the PFA powder of 3 parts by weight and the metallic aluminium powder of 1 parts by weight are mixed, and is carried out with obtained mixed powder
Supersonic flame spraying processing, to form non-sticking lining on the upper surface of matrix, (with a thickness of 180 μm, roughness is that Ra is 0.5
μm), wherein supersonic flame spraying processing condition include: kerosene oil flow be 20L/min, oxygen flow 1000L/min,
Nitrogen flow is 5L/min, argon flow 10L/min, powder feeding rate 40g/min, spray distance 400mm.
Comparative example 3
Cookware is prepared according to the method for embodiment 1, the difference is that in step (3), with the alumina powder of identical weight
End (being purchased from Beijing Sang Yao Science and Technology Development Co., Ltd., average grain diameter is by 25 μm) replaces the mixed powder, and uses air
Air spraying method replaces plasma spraying method, and effective non-sticking lining as a result cannot be formed on matrix.
Comparative example 4
Cookware is prepared according to the method for embodiment 1, the difference is that in step (3), with the PFA powder of identical weight
Plasma spraying method is replaced instead of the mixed powder, and using air pressure spray coating method.
Comparative example 5
Cookware is prepared according to the method for embodiment 1, the difference is that in step (3), replaced using electrostatic spray etc.
Plasma spray method.
Test case
The relevant parameter and performance of the cookware of each embodiment and comparative example preparation are measured according to following methods.
1, it coating surface hardness: coating surface hardness: (is purchased from according to GB/T 6739-1996 film determination of pencil hardness method
Guangzhou Sheng Hua Industrial Co., Ltd., model BEVS 1301) measurement cookware surface covering pencil hardness.It the results are shown in Table 1.
2, non-sticking lining binding force coating binding force: is measured according to G9 8642-88.It the results are shown in Table 1.
3, Shenzhen Xin Hengsen trade Co., Ltd, model (moistened surface angle: are purchased from using contact angle measurement
XHSCAZ-2 contact angle after) measuring original contact angle and rubbing, measurement range are 0-180 °.It the results are shown in Table 1.
4, coating porosity: direct weighing method, i.e. coating porosity=(1- ρα/ ρ) × 100%, wherein ραFor spray-on coating
Apparent density；ρ is the real density of coating material.It the results are shown in Table 1.
5, corrosion resistance: the sodium chloride solution that concentration is 5 weight % is added into interior pot until interior pot inner wall maximum scale
At water level, interior pot be put into energization closing lid laser heating in corresponding stew boil 8 hours (every 2 hours amount of makeup water 1 time, by liquid level
It is maintained at position when on-test), it is a cycle that 80 DEG C, which keep the temperature 16 hours, visually inspects coating surface after each cycle test
There is the periodicity of the bad phenomenons such as blistering, salient point, the results are shown in Table 1 in changing condition, record coating.
6, it cooks durability: carrying out circulation and cook, according to meter Shui Liang needed for corresponding rice cooker, according to the corresponding mode of cooking of rice cooker
It is tested, is cooked primary for a circulation.It the results are shown in Table 2.
7, the scratch resistance of coating: the washing water for being 5 weight % with dish washing liquid compound concentration, 3M (7447C) scouring pad are born
Weight 2.5kgf, the one way that swings are 1 time, every 250 replacements scouring pad, check whether coating falls off either after scraping every time
No exposing substrate (to expose >=10 lines as termination test), and record abrasion resistance.It the results are shown in Table 2.
8, non-adhesion behavior
The non-adhesion behavior of the cookware prepared in above-described embodiment and comparative example is detected according to the method for GB/T2421-1998,
Specific test process is as follows: gently wiping inner surface of pot body with the soft cloth for speckling with vegetable oil, uses clear water after being cleaned with warm water plus detergent
It cleans and wipes dry, then sample is heated, measured with land surface pyrometer, inner surface of pot body temperature is at 150 DEG C, by a Fresh Egg
It is put into pot after broken shell, vegetable edible oil or other fat oils is not added, solidified substantially to albumen, with the not damaged taking-up of nonmetallic shovel
Then egg wipes inner surface of pot body with soft cloth, and is carried out continuously three times.If inner surface of pot body can wiped clean, for
Qualification shows non-stick preferable；If inner surface of pot body is unable to wiped clean, unqualified, shows non-stick poor or do not have
It is non-stick.It the results are shown in Table 2.
Table 1
Table 2
| It cooks durability | Scratch resistance | Non-adhesion behavior | |
| Embodiment 1 | 4000 times or more | 9000 times or more | It is qualified |
| Embodiment 2 | 4000 times or more | 9000 times or more | It is qualified |
| Embodiment 3 | 4000 times or more | 9000 times or more | It is qualified |
| Embodiment 4 | 4000 times or more | 9000 times or more | It is qualified |
| Embodiment 5 | 4000 times or more | 9000 times or more | It is qualified |
| Embodiment 6 | 4000 times or more | 9000 times or more | It is qualified |
| Comparative example 1 | 2000 times | 2000 times | It is qualified |
| Comparative example 2 | 2000 times | 2500 times | It is qualified |
| Comparative example 4 | 1200 times | 3500 times | It is qualified |
| Comparative example 5 | 2000 times | 3800 times | It is qualified |
Heating utensil of the present invention surface hardness with higher and coating it can be seen from the data of upper table 1 and 2
Binding force, and corrosion resistance and good, scraping and wiping resistance performance are good, durability of cooking is good.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (11)
1. a kind of heating utensil, which is characterized in that the heating utensil includes:
The substrate (1) being heated；And
The non-sticking lining (3) being formed on the substrate (1) upper surface；
Wherein, the non-sticking lining (3) is to pass through the coating that thermal spraying is formed by the mixture containing fluororesin and metallic aluminium, is applied
Contained essential element is Al, O, F and C in layer, and the porosity of the non-sticking lining (3) is 0.5-6%, the combination of coating and substrate
Power is 20-50MPa, and moistened surface angle is 100-150 °.
2. heating utensil according to claim 1, which is characterized in that the non-sticking lining (3) with a thickness of 20-200 μm,
Roughness is that Ra is 0.5-3 μm.
3. heating utensil according to claim 1 or 2, which is characterized in that described mixed containing fluororesin and metallic aluminium
It closes in object, the content of the fluororesin is 50-80 weight %, and the content of the metallic aluminium is 20-50 weight %.
4. heating utensil according to claim 3, which is characterized in that the fluororesin is PFA.
5. heating utensil according to claim 1 or 2, which is characterized in that the non-sticking lining (3) passes through plasma spraying
Method is formed；
Preferably, the porosity of the non-sticking lining (3) is 3-6%, and the binding force of coating and substrate is 20-40MPa.
6. heating utensil according to claim 1 or 2, which is characterized in that the non-sticking lining (3) passes through supersonic flame
Spray coating method is formed；
Preferably, the porosity of the non-sticking lining (3) is 0.5-3%, and the binding force of coating and substrate is 30-50MPa.
7. heating utensil according to claim 1 or 2, which is characterized in that the heating utensil is inner container of electric cooker, pressure
Pot liner, frying pan, baking tray or cooking machine.
8. a kind of prepare the method for heating utensil described in any one of claim 1-7, this method comprises: using fluorine is contained
The mixture of resin and metallic aluminium forms non-sticking lining (3) by hot spray process on substrate (1).
9. according to the method described in claim 8, it is characterized in that, the method also includes: before implementing thermal spraying, to institute
It states substrate (1) and carries out roughening treatment, so that it is 3-10 μm that the surface roughness of the substrate (1), which reaches Ra,.
10. method according to claim 8 or claim 9, which is characterized in that the hot spray process is plasma spraying, described etc.
The technological parameter of plasma spray includes: that spray distance is 80-120mm, spray voltage 50-80V, spraying current 300-
500A, spray distance 50-150mm, powder feeding rate 20-50g/min, H2Flow is 3-5L/min, and Ar flow is 50-60L/
Min, spray gun speed are 60-300mm/s.
11. method according to claim 8 or claim 9, which is characterized in that the hot spray process is supersonic flame spraying, institute
State supersonic flame spraying technological parameter include: kerosene oil flow be 18-20L/min, oxygen flow 800-1000L/min,
Nitrogen flow is 2-5L/min, argon flow 5-10L/min, powder feeding rate 20-40g/min, spray distance 300-
400mm。
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| CN112337773A (en) * | 2019-08-09 | 2021-02-09 | 佛山市顺德区美的电热电器制造有限公司 | Composite non-stick coating and preparation method thereof, cookware and cooking utensil |
| CN114052505A (en) * | 2021-12-17 | 2022-02-18 | 武汉苏泊尔炊具有限公司 | Non-stick cookware and method of making same |
| CN114052474A (en) * | 2021-10-13 | 2022-02-18 | 浙江南龙工贸有限公司 | Stainless steel aluminum copper composite light dual-purpose cookware with intelligent handle and manufacturing method thereof |
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