CN105852651A - Production process of casting iron coating-free stainless liner of electric cooker - Google Patents
Production process of casting iron coating-free stainless liner of electric cooker Download PDFInfo
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- CN105852651A CN105852651A CN201610382594.6A CN201610382594A CN105852651A CN 105852651 A CN105852651 A CN 105852651A CN 201610382594 A CN201610382594 A CN 201610382594A CN 105852651 A CN105852651 A CN 105852651A
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- electric cooker
- inner container
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- cast iron
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/34—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cookers (AREA)
Abstract
The invention relates to a production process of a casting iron coating-free stainless liner of an electric cooker. The production process of the casting iron coating-free stainless liner of the electric cooker is characterized by comprising the following steps: (1) feeding into a furnace; (2) inflating nitrogen gas; (3) starting a draught fan; (4) heating and nitriding; and (5) carrying out osmosis. A composite layer with the thickness of 100-250 microns is generated on each of the inner and outer surfaces of the prepared liner of the electric cooker, and the composite layer composed of a nitration layer and an oxidization layer. With the implementation of the production process, the prepared casting iron coating-free stainless liner of the electric cooker is simple in structure, has no coatings and is not rusted; rice is not stuck on the liner in a cooking process; and the casting iron coating-free stainless liner is convenient to wash and is safe and environmentally friendly.
Description
[technical field]
The present invention relates to electric cooker field, particularly to a kind of cast iron without the production technology of coating non-corrosive inner container of electric cooker.
[background technology]
Inner container of electric cooker knows that how many inner bags directly contact with food, and it is the key element determining electric cooker quality, and then inner bag is certainly
So the most just becoming various brands product carries out the emphasis of differential competition in the market.Electric cooker in market has an inner bag of many item:
Tao Jing inner bag, space black intracrystalline courage, black brilliant cumulative thickness, citrine inner bag, hard oxygen inner bag, stainless steel inner container etc..The most such
Several purpose inner bags, itself but key see that it uses the technique that what material is made and surface processes.Make electricity meal
The material of pot inner bag currently mainly has: aluminium, stainless steel, composite multi-layer material and pottery.Owing to Heat Transfer for Aluminum is good,
The rapid heat dissipation when electric cooker is incubated, needs constantly heating to maintain insulation, therefore to waste electric energy.Stainless steel inner container of electric cooker,
Can use sand casting and die cast, but sand casting mould process is complicated, can not reuse, and castability is relatively
Difference；The high cost of die cast, mainly stainless steel material are relatively costly, therefore, it is difficult to promote.Iron inner container of electric cooker
Owing to the heat resistance of cast iron is high, good heat insulating so that product reaches good energy-saving effect in insulating process.
In process, easily there is rust corrosion, particularly cast iron class workpiece in metal, corrosion rate quickly, in hot and humid season
Joint, often there is corrosion phenomena in surface of the work, therefore the anticorrosion rustless property of cast iron materials is particularly important.
Ammonia, is that one has intense stimulus smell.Ammonia is as a kind of important industrial chemicals, convenient for transport and storage, logical
Often the ammonia of gaseous state is obtained liquid ammonia by pressurization or cooling.Liquefied ammonia is soluble in water, forms ammonium radical ion NH after being dissolved in water4 +, hydrogen
Oxygen radical ion OH-, in the alkaline solution of alkalescence.Liquefied ammonia is industrially widely used, and has corrosivity and readily volatilized.
The condition that ironwork gets rusty is that iron contacts with oxygen, has water to participate in.So ironwork oil surface, mopping, film forming or
It is to stop and the contacting of oxygen that chromium plating etc. can prevent iron from getting rusty, and carrys out anti-oxidation and gets rusty.
Salt spray test is that a kind of manual simulation's salt mist environment condition mainly utilizing salt spray test equipment to be created is to examine product or gold
Belong to the environmental test of material corrosion resistance.The purpose of salt spray test is the resisting salt fog corrosion matter in order to examine product or metal material
Amount, and salt spray test result judges to pronounce product quality just, whether its result of determination holds water, and is correct measurement
Product or the key of metal salt fog resistance corrosion quality.
Documents below is obtained through retrieval:
Chinese patent: application number CN201320294414.0, denomination of invention: a kind of electric cooker cylinder iron inner bag and electric cooker, pluck
Want: a kind of electric cooker cylinder iron inner bag and electric cooker, including castiron inner bag body, the outer surface of this inner bag body bottom portion
Caving inward, its inner surface is plane, and the inner surface of this inner bag body is Surface heat-treatent layer, and this inner bag body outer surface is
The nitration case of nitrogen treatment and preferred thickness thereof.It is supporting that this cast iron inner bag is applicable to electric cooker, pressure cooker etc.；This cast iron inner bag
Service life is long, and manufacturing process is simple, advantage of lower cost, and more more energy efficient environmental protection than aluminum liner, overcomes existing electric cooker
Aluminum liner problem that human body is worked the mischief, it is to avoid the harm to human body of the aluminum liner non-sticking lining, be capable of mending iron simultaneously
Purpose, be adapted for popularization and application.Shortcoming: the nitride thickness formed after this inner container of electric cooker nitrogen treatment is the thinnest, anti-corruption
Degree of corrosion is the highest, and generates oxide layer, with not carrying out oil impregnation step, produces antibiosis rust technique.
[summary of the invention]
The purpose of the present invention is contemplated to overcome the deficiencies in the prior art, proposes a kind of cast iron without coating non-corrosive inner container of electric cooker
Production technology, solves current domestic inner container of electric cooker and commonly uses aluminum products or face coat, composite etc., Long-Time Service meeting
The diseases such as easy dementia, the pure pig iron in use can supplement human body institute with Iron Release ion without coating non-corrosive inner bag
The iron ion needed, improves memory, and the health making people is more healthy, more clever, uses the most more environmentally-friendly relieved.
The technical scheme is that a kind of cast iron production technology without coating non-corrosive inner container of electric cooker, it is characterized in that: cast iron
The production technology of the inner container of electric cooker of non-corrosive without coating comprises the following steps:
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, keeps furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 20-25
After hour, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: at 400 DEG C, inner container of electric cooker is carried out seeping at high temperature 2 after using food-grade oil product and crosslinking agent mixing little
Time, after inner container of electric cooker cools down, inner container of electric cooker inner surface and outer surface are carried out wiping, at 50 DEG C, dry 12 at baking oven
Hour, obtain inner container of electric cooker finished product.
In the present invention, as further illustrating, described circulating fan is axial fan.
In the present invention, as further illustrating, described food-grade oil product is calculated by weight as peanut oil 15-30 part, greatly
Soya-bean oil 10-20 part, corn oil 25-40 part, palm oil 10-50 part.
In the present invention, as further illustrating, described crosslinking agent is the one in ethylenediamine, ethylene glycol and phenylenediamine.
In the present invention, as further illustrating, described food-level edible oil and the part by weight of crosslinking agent are
100:0.01-0.05。
In the present invention, as further illustrating, described inner container of electric cooker finished product inner and outer surfaces all generates a layer thickness and is
The composite bed of 100-250 μm, described composite bed includes nitration case and oxide layer.
In the present invention, as further illustrating, the oily permeability of described inner container of electric cooker finished product is 50%-75%.
In the present invention, as further illustrating, described cast iron is without the step of the production technology of coating non-corrosive inner container of electric cooker
The most also include the pre-treatment step of inner container of electric cooker blank:
A, carry out machining according to drawing dimensional requirement and obtain inner container of electric cooker blank, casting place can not occur during processing
Pine, pore casting flaw；
The inner and outer surfaces of inner container of electric cooker blank is processed by shot blasting by B, use polishing machine, i.e. can obtain the electric cooker handled well
Inner bag.
In the present invention, as further illustrating, described inner container of electric cooker blank material is high duty pig iron casting.
In the present invention, as further illustrating, the surface roughness after described inner container of electric cooker blank Pao Chu Ricoh reaches 3.2
μm。
The method have the advantages that
1. cast iron uses cast iron to do a main body for inner bag, wide material sources, valency without the production technology of coating non-corrosive inner container of electric cooker
Lattice are cheap, can reduce cost of material.And cast iron in use can with Iron Release ion, supplement needed by human body iron from
Son, the health making people is more healthy, uses environmental protection, safety.
2. the method using twice intensification in the cast iron production technology without coating non-corrosive inner container of electric cooker is to make object
Being heated evenly, heating for the first time is only raised to 300 DEG C, stays for some time, and heating is raised to 560 DEG C the most again, then keeps permanent
Temperature, is directly warmed up to 560 DEG C of objects than disposably and is uniformly heated, and is also unlikely to the change of material occur because of heating up too fast
Shape, distortion.
3. a cast iron forms one without the inner container of electric cooker inner and outer surfaces that the production technology output of coating non-corrosive inner container of electric cooker is next
Layer composite bed, composite bed includes nitration case and oxide layer, has high-strength matrix corrosion resistance, wearability.Through ammonia at height
Under the conditions of temperature, under the catalytic condition of iron catalyst, be decomposed into nitrogen and hydrogen, nitrogen also after high-temperature process, nitrogen Elements Diffusion
Penetrate into cast iron depths, ferro element and nitrogen and there occurs reaction, generate Fe3N, improves the corrosion resistance of inner container of electric cooker.
Thereafter, ingress of air when, ferro element and oxygen react, and generate Fe3O4, owing to nitrogen treatment is at front, oxidation
Reason is rear, and therefore outer surface layer is Fe3O4, and endosexine is Fe3N.Nitridation Technology for Heating Processing can improve the hardness of steel-iron components,
Fe3O4Coefficient of friction can be reduced and improve wear resistance, improving wearability.
4. the inner container of electric cooker that a cast iron is produced without the production technology of coating non-corrosive inner container of electric cooker is through cross-linking modified food
The seeping at high temperature of grade oil product, further enhancing the rustless property of inner container of electric cooker.Under the high temperature conditions, the heat of edible oil is steady
Qualitative poor, easily it is oxidized to other materials, reduces serviceability.Under the high temperature conditions, edible oil and crosslinking agent can
Promptly infiltrate in the hole within cast iron, and the generation that reacts has the cross-linking products of network structure, makes the formation of cast iron
One layer by inner from outer fine and close diaphragm, completely cut off cast iron with extraneous contact, thus served antirust effect.The most not
Modified edible oil, cross-linking modified after edible oil there is more preferable heat endurance, film forming and solvent resistance, and consider
Having a series of space not of uniform size inside cast iron, the present invention uses different food greases and is in harmonious proportion, by food
By the difference of grease molecular size range to fill up the different spaces in inner container of electric cooker.
In sum, the technical scheme is that and utilize cast iron a kind of without the rustless inner container of electric cooker of coating for raw material making,
Provide the production technology making this inner container of electric cooker simultaneously.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the enlarged drawing of partial sectional view at the A of Fig. 1.Sequence number in figure: 1, inner bag；2, nitration case；3, oxide layer.
[detailed description of the invention]
Embodiment 1:
1. the pre-treatment of inner container of electric cooker blank
High duty pig iron casting inner container of electric cooker blank is selected to carry out machining according to drawing dimensional requirement, can not during processing
Casting Susong, pore casting flaw occur；Then show to be processed by shot blasting to inner container of electric cooker with polishing machine, make surface thick
Rugosity reaches 3.2, i.e. can get inner container of electric cooker.
2. the production technology of inner container of electric cooker
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, kept furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 20 hours
After, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: count peanut oil 15 parts by weight, soybean oil 10 parts, corn oil 25 parts, palm oil 50 parts and
0.01 part of crosslinking agent carries out seeping at high temperature 2 hours to inner container of electric cooker at 400 DEG C, to electric cooker after inner container of electric cooker cools down
Inner bag inner surface and outer surface carry out wiping, dry 12 hours at baking oven, obtain inner container of electric cooker finished product at 50 DEG C.
Embodiment 2:
1. the pre-treatment of inner container of electric cooker blank
High duty pig iron casting inner container of electric cooker blank is selected to carry out machining according to drawing dimensional requirement, can not during processing
Casting Susong, pore casting flaw occur；Then show to be processed by shot blasting to inner container of electric cooker with polishing machine, make surface thick
Rugosity reaches 3.2, i.e. can get inner container of electric cooker.
2. the production technology of inner container of electric cooker
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, kept furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 21 hours
After, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: count peanut oil 20 parts by weight, soybean oil 13 parts, corn oil 30 parts, palm oil 37 parts and
0.02 part of crosslinking agent carries out seeping at high temperature 2 hours to inner container of electric cooker at 400 DEG C, to electric cooker after inner container of electric cooker cools down
Inner bag inner surface and outer surface carry out wiping, dry 12 hours at baking oven, obtain inner container of electric cooker finished product at 50 DEG C.
Embodiment 3:
1. the pre-treatment of inner container of electric cooker blank
High duty pig iron casting inner container of electric cooker blank is selected to carry out machining according to drawing dimensional requirement, can not during processing
Casting Susong, pore casting flaw occur；Then show to be processed by shot blasting to inner container of electric cooker with polishing machine, make surface thick
Rugosity reaches 3.2, i.e. can get inner container of electric cooker.
2. the production technology of inner container of electric cooker
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, kept furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 22 hours
After, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: count peanut oil 25 parts by weight, soybean oil 16 parts, corn oil 35 parts, palm oil 24 parts and
0.03 part of crosslinking agent carries out seeping at high temperature 2 hours to inner container of electric cooker at 400 DEG C, to electric cooker after inner container of electric cooker cools down
Inner bag inner surface and outer surface carry out wiping, dry 12 hours at baking oven, obtain inner container of electric cooker finished product at 50 DEG C.
Embodiment 4:
1. the pre-treatment of inner container of electric cooker blank
High duty pig iron casting inner container of electric cooker blank is selected to carry out machining according to drawing dimensional requirement, can not during processing
Casting Susong, pore casting flaw occur；Then show to be processed by shot blasting to inner container of electric cooker with polishing machine, make surface thick
Rugosity reaches 3.2, i.e. can get inner container of electric cooker.
2. the production technology of inner container of electric cooker
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, kept furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 24 hours
After, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: count peanut oil 30 parts by weight, soybean oil 20 parts, corn oil 35 parts, palm oil 15 parts and
0.04 part of crosslinking agent carries out seeping at high temperature 2 hours to inner container of electric cooker at 400 DEG C, to electric cooker after inner container of electric cooker cools down
Inner bag inner surface and outer surface carry out wiping, dry 12 hours at baking oven, obtain inner container of electric cooker finished product at 50 DEG C.
Embodiment 5:
1. the pre-treatment of inner container of electric cooker blank
High duty pig iron casting inner container of electric cooker blank is selected to carry out machining according to drawing dimensional requirement, can not during processing
Casting Susong, pore casting flaw occur；Then show to be processed by shot blasting to inner container of electric cooker with polishing machine, make surface thick
Rugosity reaches 3.2, i.e. can get inner container of electric cooker.
2. the production technology of inner container of electric cooker
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, kept furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 25 hours
After, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: count peanut oil 30 parts by weight, soybean oil 20 parts, corn oil 40 parts, palm oil 10 parts and
0.05 part of crosslinking agent carries out seeping at high temperature 2 hours to inner container of electric cooker at 400 DEG C, to electric cooker after inner container of electric cooker cools down
Inner bag inner surface and outer surface carry out wiping, dry 12 hours at baking oven, obtain inner container of electric cooker finished product at 50 DEG C.
Comparative example 1
Inner container of electric cooker that above-described embodiment is prepared use routine techniques respectively to its nitride thickness, oxidated layer thickness and
Composite bed thickness detects, and tries with the inner container of electric cooker still not adding the infiltration of food-grade oil product according to embodiment 5 preparation
Testing contrast, comparison result is shown in Table 1.
Table 1
Table 1 result shows:
The measurement result of nitride thickness: the inner container of electric cooker < inner container of electric cooker < electricity of embodiment 3 of embodiment 2 of embodiment 1
Rice cooker inner bag < the inner container of electric cooker of the inner container of electric cooker=embodiment 5 of embodiment 4=do not add in the electric cooker that food-grade oil product permeates
Courage；
The measurement result of oxidated layer thickness: the inner container of electric cooker < inner container of electric cooker < electricity of embodiment 3 of embodiment 2 of embodiment 1
Rice cooker inner bag < the inner container of electric cooker of the inner container of electric cooker=embodiment 5 of embodiment 4=do not add in the electric cooker that food-grade oil product permeates
Courage；
The measurement result of composite bed thickness: the inner container of electric cooker < inner container of electric cooker < electricity of embodiment 3 of embodiment 2 of embodiment 1
Rice cooker inner bag < the inner container of electric cooker of the inner container of electric cooker=embodiment 5 of embodiment 4=do not add in the electric cooker that food-grade oil product permeates
Courage；
The measurement result of salt spray test: do not add the inner container of electric cooker < inner container of electric cooker=enforcement of embodiment 1 of food-grade oil product infiltration
Inner container of electric cooker < the inner container of electric cooker of embodiment 5 of the inner container of electric cooker=embodiment 4 of the inner container of electric cooker=embodiment 3 of example 2.
Comparative example 2
The inner container of electric cooker that prepared by above-described embodiment uses routine techniques carry out oil permeability test and be scanned Electronic Speculum and sweep
Retouching, carry out Experimental Comparison with the inner container of electric cooker still not adding crosslinking agent according to embodiment 5 preparation, comparison result is shown in Table 2.
Table 2
Table 2 result shows:
The result of ESEM shows: in the hole of the inner container of electric cooker not adding crosslinking agent infiltration, only fraction hole has been saturated
Liquid, but the hole having added the inner container of electric cooker of the embodiment of crosslinking agent has major part to be saturated fluid body；
Permeability arranges from small to large: do not add the inner container of electric cooker < inner container of electric cooker < electricity of embodiment 1 of embodiment 2 of crosslinking agent
Rice cooker inner bag < inner container of electric cooker < inner container of electric cooker < the inner container of electric cooker of embodiment 5 of embodiment 4 of embodiment 3.
In a kind of better embodiment of the present invention, embodiment 5
1. the pre-treatment of inner container of electric cooker blank
High duty pig iron casting inner container of electric cooker blank is selected to carry out machining according to drawing dimensional requirement, can not during processing
Casting Susong, pore casting flaw occur；Then show to be processed by shot blasting to inner container of electric cooker with polishing machine, make surface thick
Rugosity reaches 3.2, i.e. can get inner container of electric cooker.
2. the production technology of inner container of electric cooker
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, kept furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 25 hours
After, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: count peanut oil 30 parts by weight, soybean oil 20 parts, corn oil 40 parts, palm oil 10 parts and
0.05 part of crosslinking agent carries out seeping at high temperature 2 hours to inner container of electric cooker at 400 DEG C, to electric cooker after inner container of electric cooker cools down
Inner bag inner surface and outer surface carry out wiping, dry 12 hours at baking oven, obtain inner container of electric cooker finished product at 50 DEG C.
Described above is the detailed description for the preferable possible embodiments of the present invention, but embodiment is not limited to the special of the present invention
Profit application range, the equal change completed under the technical spirit suggested by all present invention or modification change, the present invention all should be belonged to
Contained the scope of the claims.
Claims (10)
1. cast iron is without a production technology for coating non-corrosive inner container of electric cooker, it is characterized in that: cast iron is without coating non-corrosive electricity meal
The production technology of pot inner bag comprises the following steps:
(1) stove is entered: at normal temperatures by the special movements and postures of actors of inner container of electric cooker blank, by the gap keeping 2cm between inner bag and inner bag
It is well placed, then puts stove into；
(2) inflated with nitrogen: inner container of electric cooker seals stove immediately after entering stove, then starts rotary-vane vaccum pump and vacuumizes
Processing to furnace pressure is-0.1Mpa, and being then filled with purity in stove is 99.99% nitrogen, is 0.12Mpa to furnace pressure.
(3) start blower fan: open circulating fan in stove, keep uniform gas flow；
(4) heat up, nitrogenize: temperature-rise period uses twice heating mode to carry out, carry out with the heating rates of 40 DEG C/min
Once heat up, after arriving 300 DEG C, be incubated 25 minutes, the most again carry out second time with the heating rate of 40 DEG C/min and heat up,
After arriving 560 DEG C of design temperatures, ammonia to the furnace pressure being passed through 99.99% is 0.3Mpa, and controlling charge flow rate is 0.05
L/min, by regulating the size of drain tap, keeps furnace pressure constant for 0.30Mpa, 560 DEG C of successive reactions 20-25
After hour, allow inner bag naturally cool to 400 DEG C of temperature with stove and come out of the stove；
(5) infiltration: at 400 DEG C, inner container of electric cooker is carried out seeping at high temperature 2 after using food-grade oil product and crosslinking agent mixing little
Time, after inner container of electric cooker cools down, inner container of electric cooker inner surface and outer surface are carried out wiping, at 50 DEG C, dry 12 at baking oven
Hour, obtain inner container of electric cooker finished product.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that:
Circulating fan described in step (3) is axial fan.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that:
Food-grade oil product described in step (5) is calculated by weight as peanut oil 15-30 part, soybean oil 10-20 part, corn oil
25-40 part and palm oil 10-50 part mix.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that:
Crosslinking agent described in step (5) is the one in ethylenediamine, ethylene glycol and phenylenediamine.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that:
The part by weight of the food-level edible oil described in step (5) and crosslinking agent is 100:0.01-0.05.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that: institute
Inner surface and the outer surface of stating inner container of electric cooker finished product are the composite bed that a layer thickness is 100-250 μm, described composite bed bag
Include nitration case and oxide layer.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that: institute
The permeability of the inner container of electric cooker finished product stated is 50%-75%.
A kind of cast iron the most according to claim 1, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that: also
Including the pre-treatment of inner container of electric cooker blank, specifically comprise the following steps that
A, carry out machining according to drawing dimensional requirement and obtain inner container of electric cooker blank, casting place can not occur during processing
Pine, pore casting flaw；
Inner surface and the outer surface of inner container of electric cooker blank are processed by shot blasting by B, use polishing machine, i.e. can obtain the electricity handled well
Rice cooker inner bag.
A kind of cast iron the most according to claim 8, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that:
Inner container of electric cooker blank described in step A is high duty pig iron casting.
A kind of cast iron the most according to claim 8, without the production technology of coating non-corrosive inner container of electric cooker, is characterized in that:
Surface roughness after the most described inner container of electric cooker blank Pao Chu Ricoh is 3.2 μm.
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| CN106580060A (en) * | 2017-01-06 | 2017-04-26 | 王勇添 | Pig-iron electric rice cooker liner and preparation method therefor |
| CN106618147A (en) * | 2016-10-24 | 2017-05-10 | 游世鉴 | Inner container for electric cooker based on electromagnetic heating |
| CN107348828A (en) * | 2017-04-05 | 2017-11-17 | 浙江苏泊尔家电制造有限公司 | Method for pot in the interior pot, cooking apparatus and manufacture of cooking apparatus |
| CN107485298A (en) * | 2017-10-09 | 2017-12-19 | 常州福隆工控设备有限公司 | A kind of preparation method of antibiosis rust irony electric cooker inner container |
| CN109124371A (en) * | 2018-07-06 | 2019-01-04 | 武汉安在厨具有限公司 | Rust-less kitchenware material, rust-less kitchenware and preparation method thereof |
| CN109303466A (en) * | 2017-07-28 | 2019-02-05 | 九阳股份有限公司 | Antirust cookware and its manufacturing method |
| CN110977344A (en) * | 2019-12-04 | 2020-04-10 | 佛山市顺德区远熠模塑电器有限公司 | Production process of grinding cavity of garbage disposer |
| CN112404352A (en) * | 2020-11-13 | 2021-02-26 | 广西陆川县威能达热能科技有限公司 | Casting process of health-care inner container of uncoated rustless cast iron electric cooker |
| CN114774839A (en) * | 2021-10-15 | 2022-07-22 | 谢喜 | Heat treatment equipment for iron casting rustless electric cooker inner container and manufacturing method |
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| CN109124371A (en) * | 2018-07-06 | 2019-01-04 | 武汉安在厨具有限公司 | Rust-less kitchenware material, rust-less kitchenware and preparation method thereof |
| CN110977344A (en) * | 2019-12-04 | 2020-04-10 | 佛山市顺德区远熠模塑电器有限公司 | Production process of grinding cavity of garbage disposer |
| CN112404352A (en) * | 2020-11-13 | 2021-02-26 | 广西陆川县威能达热能科技有限公司 | Casting process of health-care inner container of uncoated rustless cast iron electric cooker |
| CN114774839A (en) * | 2021-10-15 | 2022-07-22 | 谢喜 | Heat treatment equipment for iron casting rustless electric cooker inner container and manufacturing method |
| CN114774839B (en) * | 2021-10-15 | 2023-07-25 | 谢喜 | Heat treatment equipment for stainless electric cooker liner of iron casting and manufacturing method |
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