CN101015892B - Producing method of composite cooking-vessel and product thereof - Google Patents
Producing method of composite cooking-vessel and product thereof Download PDFInfo
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- CN101015892B CN101015892B CN2007100377120A CN200710037712A CN101015892B CN 101015892 B CN101015892 B CN 101015892B CN 2007100377120 A CN2007100377120 A CN 2007100377120A CN 200710037712 A CN200710037712 A CN 200710037712A CN 101015892 B CN101015892 B CN 101015892B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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- B23P2700/05—Cooking vessels
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Abstract
The invention provides a method for producing composite cooking tool, and relative method, for resolving the problems as low thermal efficiency, long cooking time and short service life. The inventive method comprises that A, producing body of cooling tool as a, material selection, cold rolling, b, washing, drying, c, roller pressing, d, drawing, B, returning bottom as a, washing, drying, b, thermally forging or solder welding, c, surface treatment. The inventive composite cooking tool comprises a body and a bottom plate, wherein the bottom plate has welded metal plate and metal sheets from inner to outer via thermal forging or solder welding, the body has two or three metal layers welded via thermal forging or solder welding, and the body and the bottom plate are welded together via thermal forging or solder welding. The invention has simple process, low cost, uniform heated and long service life.
Description
Technical field
The present invention relates to a kind of preparation method and goods thereof of cooking appliance; Relate in particular to a kind of preparation method and goods thereof that are applied to the composite cooking-vessel on the electromagnetic oven; Belong to the kitchen utensils technical field.
Background technology
Existing cooking appliance especially is applied in the cooking appliance on the electromagnetic oven, because the pot body of cooking appliance is adopted as aluminium usually or stainless steel is that material is made, the electromagnetic wave that the absorption electromagnetic oven sends is relatively less, defectives such as the thermal efficiency is low in use, power consumption is many to cause cooking appliance, and the cooking time is long.
In order to overcome these defectives, the someone has designed the cooking appliance that a kind of bottom is a composite construction, and it sets up the logical stronger stainless steel bed of material of magnetic energy power at the external side bottom of pot, thereby improves electromagnetic quantities received.Clearly, can be heated fast by such structure cooking appliance, the cooking time is shorter.But, it is aluminum that cooking appliance is generally body, and the body of stainless steel layer and above-mentioned aluminium cooking appliance is fixed together by welding, and cooking appliance can expand with heat and contract with cold when not being heated being heated, because material difference, stainless steel and aluminium internal stress under the effect of expanding with heat and contract with cold differs.It is inhomogeneous not only can to cause cooking appliance to be heated, and cooking appliance bottom individual layer might divide or produce the crack with the stainless steel bed of material, in the time of seriously even also can come off, causes cooking appliance normally to use.
For this reason, the patent No. provides a kind of " cooking appliance with heated base " for 93109890.4, its bottom is connected by hole, gap structure and the stainless steel bed of material, though enlarged the cooking appliance bottom to electromagnetic quantities received, the influence of not expanded with heat and contract with cold.But, the hole on it, gap structure complexity, production cost height.In addition, hole, gap structure bring concentrating of stress to cooking appliance easily, influence the service life of cooking appliance.The more important thing is: the body of this cooking appliance adopts single layer structure, and this structure is heated not rapid, evenly; Accumulation of heat is not lasting, can't satisfy the demand in market.
Summary of the invention
The object of the present invention is to provide preparation method of a kind of composite cooking-vessel and products thereof, make by this preparation method that to have composite sheet be that body adds the cooking appliance that coats bottom, this cooking appliance is heated more rapidly, accumulation of heat is lasting more, it is more even to be heated.
Technique scheme of the present invention is implemented by following technical problem: a kind of preparation method of composite cooking-vessel, and this preparation method may further comprise the steps:
The making of A, cooking appliance body:
A, selection, cold rolling: select aluminium and stainless steel for use; Then above-mentioned aluminium and stainless steel are become aluminium plate and stainless steel materials by cold rolling, wherein the thickness by cold rolling back aluminium is 1.0mm～6.0mm, stainless steel thickness be 0.3mm～1.5mm;
B, cleaning, oven dry: after aluminium plate that above-mentioned process is cold rolling and stainless steel materials are placed on and clean 5～30 minutes in the cleaning machine, under temperature is 40～75 ℃ condition, dry then;
C, roll-in: with above-mentioned through cleaning, aluminium plate and stainless steel materials after the oven dry position, be placed on to be placed on when being heated to 400 ℃～600 ℃ in the stove to be rolled into composite sheet in the roll squeezer;
D, stretching: with above-mentioned be drawn into the cooking appliance body through the composite sheet after the roll-in by pressing equipment after, carry out neat mouthful and cut edge;
B, the multiple end:
A, cleaning, oven dry: the cooking appliance body of above-mentioned making and the metallic plate, the sheet metal that are used for the multiple end are placed on after cleaning machine cleans 5～30 minutes, under temperature is 40～75 ℃ condition, dry then;
B, heat are forged or soldering: with above-mentioned through cleaning, cooking appliance body, metallic plate and sheet metal after the oven dry make metallic plate and sheet metal multiple successively in the bottom of cooking appliance body by the location, forge or the soldering aftershaping is the composite cooking-vessel semi-finished product through overheated then;
C, surface treatment: according to the product surface demand, with above-mentioned through overheated forge or soldering after the composite cooking-vessel semi-finished product obtain the composite cooking-vessel finished product after handling through polishing, oxidation or spraying method.
The present invention adopts metal material to be compounded to form the cooking appliance body and sets up the logical stronger sheet metal of magnetic energy power in its bottom, the electromagnetic energy that electric energy is changed effectively can be absorbed, and has not only improved electromagnetic receiving amount; And it can be converted into thermal energy transfer rapidly to whole cooking appliance; Improved the utilization rate of electric energy; And be provided with metallic plate between the bottom of sheet metal and cooking appliance body, thereby that the cooking appliance of making is heated is more even, accumulation of heat is more lasting.
In the preparation method of above-mentioned composite cooking-vessel, selected aluminium is a kind of in aluminium alloy or the fine aluminium in the selection process of steps A; Selected stainless steel is one or both in austenite, martensite or the ferritic stainless steel.
In the preparation method of above-mentioned composite cooking-vessel, the pressure of institute's employing roll squeezer is 300～1000 tons in the roll-in process of steps A.Adopt 300～1000 tons pressure can make firm the linking together of composite material of cooking appliance body; Pressure is lower than 300 tons can't make firm the linking together of composite material; Pressure makes metal material damage greater than 1000 tons easily, thereby has increased the defect rate of cooking appliance greatly, has increased production cost.
In the preparation method of above-mentioned composite cooking-vessel, the metallic plate described in the step B is a kind of in aluminium alloy or the fine aluminium, and its thickness is 1.5mm～8mm; The thickness of the metallic plate that the present invention adopts is at 1.5mm～8mm, if will make the heat storage performance of its composite cooking-vessel poor when being lower than 1.5mm, will make its composite cooking-vessel slow in firing rate at the beginning greater than 8mm, increased consumer's use cost.Described sheet metal is a kind of in austenite, martensite or the ferrite stainless steel disc, and its thickness is 0.5mm～1.5mm.The thickness of the sheet metal that the present invention adopts is at 0.5mm～1.5mm, if it will make its composite cooking-vessel heat radiation too fast when being lower than 0.5mm, it is inhomogeneous during greater than 1.5mm its composite cooking-vessel to be heated.
In the preparation method of above-mentioned composite cooking-vessel, the heat of step B forge or brazing process described in the heat detailed process of forging be: multiple successively being placed on behind the bottom of cooking appliance body in the stove or by heater of metallic plate, sheet metal is heated to 380～620 ℃, and the molded composite cooking-vessel semi-finished product that are are forged by 600～2500 tons forcing press heat in the heating back.The present invention adopts the heat mode of forging metallic plate, sheet metal can be answered these three layers of firm linking together in the bottom of cooking appliance body.When the pressure of forcing press is lower than 500 tons or/and heating does not reach 380 ℃ and can't make three layers of firm linking together to cooking appliance; And the pressure of working as forcing press is easy to make the bottom of metallic plate, sheet metal and cooking appliance body to damage greater than 2500 tons or/and to the cooking appliance heating above 620 ℃, thereby has increased the defect rate of cooking appliance greatly, has increased production cost.
In the preparation method of above-mentioned composite cooking-vessel, the heat of step B forge or brazing process described in the detailed process of soldering be: clean, metallic plate two sides after the oven dry evenly scribbles soldering flux, is placed in the bottom of cooking appliance body that to be 380～600 ℃ in temperature in the high frequency brazing machine be the composite cooking-vessel semi-finished product with its lead welding and shaping with metallic plate, sheet metal are multiple successively then again.The present invention adopts brazing mode also metallic plate, sheet metal can be answered well-set the linking together of this three-layer metal of the bottom of cooking appliance body.
As preferably, described soldering flux is a kind of among soldering flux AS-II, the soldering flux CU-I, and consumption is 0.1g～1g/cm
2Wherein soldering flux such as soldering flux AS-II, the soldering flux CU-I etc. of the present invention's employing have better binding ability with aluminium, stainless steel and other metal materials; Particularly soldering flux AS-II is aluminium and stainless comprehensive solder.
In addition, the present invention also provides a kind of composite cooking-vessel of being made by above-mentioned preparation method, this composite cooking-vessel comprises cooking appliance body and base plate, described base plate is from the inside to the outside by metallic plate with sheet metal forges by heat or soldering is combined with each other, described body is two-layer or the three-layer metal layer forges by compound heat or soldering is composited, and also forges by heat between body and the base plate or soldering is combined with each other.
In above-mentioned composite cooking-vessel, described sheet metal is a kind of in austenite, martensite or the ferrite stainless steel disc, described metallic plate is aluminium alloy plate or pure aluminum plate, described body is to be made up of internal layer and outer two-layer institute from the inside to the outside, its internal layer is austenite, martensite or ferritic stainless steel metal level, skin is aluminium alloy or pure aluminum metal layer, or its internal layer is aluminium alloy or pure aluminum metal layer, and skin is austenite, martensite or ferritic stainless steel metal level.
In above-mentioned composite cooking-vessel, described sheet metal is a kind of in austenite, martensite or the ferrite stainless steel disc, described metallic plate is aluminium alloy plate or pure aluminum plate, described body is to be made up of internal layer, interlayer and outer three layers of institute from the inside to the outside, its internal layer and skin are austenite, martensite or ferritic stainless steel metal level, and its interlayer is aluminium alloy or pure aluminum metal layer.
Therefore, the present invention has following characteristics:
1, the preparation method of composite cooking-vessel of the present invention, technological process is simple, and production cost is low;
2, the composite cooking-vessel of making by preparation method of the present invention adopts two-layer or the three-layer metal material is composited that cooking device is external to add the bulk strength that cladding can improve cooking appliance; can play protection more fully again; reduce the degree that the cooking appliance bottom is corroded, increased the service life of cooking appliance.
3, the composite cooking-vessel of making by preparation method of the present invention adopts two-layer or thereby the three-layer metal material external cladding that adds of cooking device that is composited makes that it is heated more rapidly, accumulation of heat is more lasting, and it is more even to be heated.
Description of drawings
Fig. 1 is that body is the cross-sectional view of two-layer composite cooking-vessel of the present invention;
Fig. 2 is the A part structure for amplifying schematic diagram among Fig. 1;
Fig. 3 is the B part structure for amplifying schematic diagram among Fig. 1;
Fig. 4 is that body is the cross-sectional view of three layers composite cooking-vessel of the present invention;
Fig. 5 is the C part structure for amplifying schematic diagram among Fig. 4;
Fig. 6 is the D part structure for amplifying schematic diagram among Fig. 4;
Among the figure: 1, body; 11, skin; 12, interlayer; 13, internal layer; 2, base plate; 21, sheet metal; 22, metallic plate.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail; But the present invention is not limited to these embodiment.
Embodiment 1
One: the making of two-layer composite cooking-vessel
The making of A, cooking appliance body:
A, selection, cold rolling: selecting model for use is 1050 aluminium alloy and martensitic stain less steel; Then two kinds of metal materials are carried out cold rolling one-tenth sheet metal by roll squeezer (model: RP170-110, Zhongxin Heavy Machinery Co make), the thickness by cold rolling back aluminum alloy plate materials is 5.0mm, the martensitic stainless steel material thickness be 1.5mm;
B, cleaning, oven dry: aluminium alloy that above-mentioned process is cold rolling and martensitic stain less steel are placed on and clean in the cleaning machine (manufacturing of the Zhaoqing second lathe Co., Ltd) after 5 minutes, dry under temperature is 40 ℃ condition then;
C, roll-in: pass through favour mash welder (model: WL-SP-150K through the sheet metal after cleaning, drying with above-mentioned, the manufacturing of Huizhou City China scholar welding equipment manufactory) is placed on behind the spot welding location when being heated to 450 ℃ in the continuous tunnel furnace (electromechanical equipment in plenty Manufacturing Co., Ltd in Shenzhen's makes) by being rolled into two-layer composite sheet in the roll squeezer (model: RP170-110, Zhongxin Heavy Machinery Co makes);
D, stretching: with above-mentioned be drawn into the cooking appliance body through the two-layer composite sheet after the roll-in by hydraulic press (model: YZ28G-350E, Foshan Kang Sida hydraulic press Co., Ltd makes) after, carry out neat mouthful and 80 tons of punch presses by Shearing machine for mouth of steel cylinder and cut edge;
B, the multiple end:
A, cleaning, oven dry: be 1050 aluminum alloy sheet with cooking appliance body, the thickness of above-mentioned making for the 2mm model as metallic plate, thickness be 1.5mm martensitic stain less steel sheet as sheet metal be placed on clean 10 minutes in the cleaning machine (manufacturing of the Zhaoqing second lathe Co., Ltd) after, under temperature is 40 ℃ condition, dry then;
B, heat are forged: with above-mentioned model is that 1050 aluminum alloy sheet, martensitic stain less steel sheet are by mash welder (model: WL-SP-150K, the manufacturing of Huizhou City China scholar welding equipment manufactory) carries out multiple successively behind the bottom of cooking appliance body, being placed in continuous tunnel furnace (electromechanical equipment in plenty Manufacturing Co., Ltd in Shenzhen's makes) or the 250KVA medium frequency equipment (manufacturing of Huizhou hundred Co., Ltds of emerging machinery plant) in spot welding location and be heated to 380 ℃, heat the back and forge the molded composite cooking-vessel semi-finished product that are by 1600 tons friction press (Qingdao Forging Press Machinery Group Co.'s manufacturing) heat;
C, surface treatment-polishing: the half-finished martensitic stain less steel of above-mentioned composite cooking-vessel after overheated forging is simultaneously passed through by obtaining the composite cooking-vessel finished product after polishing machine (manufacturing of the Zhaoqing second lathe Co., Ltd) polishing outside the abnormity of making.
As Fig. 1, Fig. 2 and shown in Figure 3, this two-layer composite cooking-vessel comprises body 1, body 1 has bottom and sidewall, the bottom outside of body 1 is fixed with metallic plate 22 and sheet metal 21, described metallic plate 22 and sheet metal 21 are combined with each other by the heat mode of forging with the bottom of body 1, it is that 1050 aluminium alloy is that material is made that described metallic plate 22 adopts the stronger model of the capacity of heat transmission, and described sheet metal 21 adopts that to have the stronger martensitic stain less steel of logical magnetic energy power be that material is made.
The making of one: three layer of composite cooking-vessel
The making of A, cooking appliance body:
A, selection, cold rolling: select fine aluminium and martensitic stain less steel and ferritic stainless steel for use; Then with three kinds of metal materials by the cold rolling one-tenth sheet metal of roll squeezer (model: RP170-110 roll squeezer, Zhongxin Heavy Machinery Co makes), the thickness by cold rolling back fine aluminium sheet material is 1.0mm, the martensitic stainless steel material thickness be 0.3mm; The ferrite stainless steel material thickness be 1.5mm;
B, cleaning, oven dry: fine aluminium sheet material, martensitic stainless steel material and the ferrite stainless steel material that above-mentioned process is cold rolling is placed on and cleans in (manufacturing of the Zhaoqing second lathe Co., Ltd) after 30 minutes, dries under temperature is 75 ℃ condition then;
C, spot welding, roll-in: pass through mash welder (model: WL-SP-150K through the sheet metal after cleaning, drying with above-mentioned, the manufacturing of Huizhou City China scholar welding equipment manufactory) is placed on after spot welding is located to be placed in the roll squeezer (model: RP170-110, Zhongxin Heavy Machinery Co makes) when being heated to 600 ℃ in the continuous tunnel furnace (electromechanical equipment in plenty Manufacturing Co., Ltd in Shenzhen's makes) and is rolled into three layers of composite sheet;
D, stretching: with above-mentioned be drawn into the cooking appliance body through three layers of composite sheet after the roll-in by hydraulic press (model: YZ28G-350E, Foshan Kang Sida hydraulic press Co., Ltd makes) after, carry out neat mouthful and 80 tons of punch presses by Shearing machine for mouth of steel cylinder and cut edge;
B, the multiple end:
A, cleaning, oven dry: with cooking appliance body, the thickness of above-mentioned making be 2.0mm fine aluminium sheet as metallic plate, thickness be 1.5mm ferrite stainless steel disc as outer sheet metal again be placed on clean 20 minutes in the cleaning machine (manufacturing of the Zhaoqing second lathe Co., Ltd) after, under temperature is 75 ℃ condition, dry then;
B, soldering: the fine aluminium sheet two sides after cleaning, drying evenly scribbles soldering flux soldering flux AS-II, and consumption is 0.1g～1.0g/cm
2Then by mash welder (model: WL-SP-150K, Huizhou City China scholar's welding equipment manufactory makes) the spot welding location make fine aluminium sheet, ferrite stainless steel disc successively solid be placed on again in the bottom of cooking appliance body that to be 450 ℃ in temperature in the high frequency brazing machine (model: DWHF-80-A1, the big bright company of Korea S makes) be the composite cooking-vessel semi-finished product with its lead welding and shaping.
C, surface treatment-polishing: obtain the composite cooking-vessel finished product after polishing machine outside simultaneously passing through the half-finished martensitic stain less steel of above-mentioned composite cooking-vessel after overheated forging by abnormity (manufacturing of the Zhaoqing second lathe Co., Ltd) polishing.
As Fig. 4, Fig. 5 and shown in Figure 6, these three layers of composite cooking-vessels comprise body 1, body 1 has bottom and sidewall, the outside of body 1 is fixed with metallic plate 22 and sheet metal 21, described metallic plate 22 and sheet metal 21 and body 1 are combined with each other by brazing mode, it is that material is made that described metallic plate 22 adopts the stronger fine aluminium of the capacity of heat transmission, and it is that material is made that described sheet metal 4 employings have the stronger ferritic stainless steel of logical magnetic energy power.
Comparative example 1
Adopting the individual layer model is the cooking appliance body that 304 stainless steel material is made, the bottom of cooking appliance be compounded with by brazing mode with ferritic stainless steel as outside answer the cooking appliance of the composite construction that metal negative makes.
Table 1 is the comparison of cooking appliance on performance of the composite construction of embodiment 1 two-layer composite cooking-vessel, 2 three layers of composite cooking device of embodiment and comparative example 1
Table 1: the cooking appliance performance of composite cooking-vessel of the present invention and comparative example 1 relatively
As can be seen from Table 1, this is two-layer or three layers of composite cooking-vessel adopts two-layer or the three-layer metal material is composited, and the cooking appliance body adds the bulk strength that cladding not only can improve cooking appliance, cooking appliance is played protection more fully, reduce the degree that the cooking appliance bottom is corroded, increased the service life of cooking appliance; And be heated more rapidly, accumulation of heat is more lasting, it is more even to be heated.
Specific embodiment described in the present invention only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although the present invention has been made detailed explanation and has quoted some instantiations as proof, to those skilled in the art, only otherwise leave that the spirit and scope of the present invention can be done various variations or correction is obvious.
Claims (10)
1. the preparation method of a composite cooking-vessel, this preparation method may further comprise the steps:
The making of A, cooking appliance body (1):
A, selection, cold rolling: select aluminium and stainless steel for use; Then above-mentioned aluminium and stainless steel are become aluminium plate and stainless steel materials by cold rolling, wherein the thickness by cold rolling back aluminium is 1.0mm～6.0mm, stainless steel thickness be 0.3mm～1.5mm;
B, cleaning, oven dry: after aluminium plate that above-mentioned process is cold rolling and stainless steel materials are placed on and clean 5～30 minutes in the cleaning machine, under temperature is 40～75 ℃ condition, dry then;
C, roll-in: with above-mentioned through cleaning, aluminium plate and stainless steel materials after the oven dry position, be placed on to be placed on when being heated to 400 ℃～600 ℃ in the stove to be rolled into composite sheet in the roll squeezer;
D, stretching: with above-mentioned be drawn into cooking appliance body (1) through the composite sheet after the roll-in by pressing equipment after, carry out neat mouthful and cut edge;
B, the multiple end:
A, cleaning, oven dry: with cooking appliance body (1), metallic plate (22) and the sheet metal (21) of above-mentioned making be placed on clean 5～30 minutes in the cleaning machine after, under temperature is 40～75 ℃ condition, dry then;
B, heat are forged or soldering: with above-mentioned through cleaning, cooking appliance body (1), metallic plate (22) and sheet metal (21) after the oven dry answer in the bottom of cooking appliance body (1) metallic plate (22) and sheet metal (21) by the location successively, forge or the soldering aftershaping is the composite cooking-vessel semi-finished product through overheated then;
C, surface treatment: according to the product surface demand, with above-mentioned through overheated forge or soldering after the composite cooking-vessel semi-finished product obtain the composite cooking-vessel finished product after handling through polishing, oxidation or spraying method.
2. the preparation method of composite cooking-vessel according to claim 1 is characterized in that: selected aluminium is a kind of in aluminium alloy or the fine aluminium in the selection process of steps A; Selected stainless steel is one or both in austenite, martensite or the ferritic stainless steel.
3. the preparation method of composite cooking-vessel according to claim 1 and 2, it is characterized in that: the pressure of institute's employing roll squeezer is 300～1000 tons in the roll-in process of steps A.
4. the preparation method of composite cooking-vessel according to claim 1 and 2 is characterized in that: a kind of in aluminium alloy or the fine aluminium of the metallic plate described in the step B (22), and its thickness is 1.5mm～8mm; Described sheet metal (21) is a kind of in austenite, martensite or the ferrite stainless steel disc, and its thickness is 0.5mm～1.5mm.
5. the preparation method of composite cooking-vessel according to claim 1 and 2, it is characterized in that: the heat of step B forge or brazing process described in the heat detailed process of forging be: multiple successively being placed on behind the bottom of cooking appliance body (1) in the stove or by heater of metallic plate (22) and sheet metal (21) sheet is heated to 380～620 ℃, and the molded composite cooking-vessel semi-finished product that are are forged by 600～2500 tons forcing press heat in the heating back.
6. the preparation method of composite cooking-vessel according to claim 1 and 2, it is characterized in that: the heat of step B forge or brazing process described in the detailed process of soldering be: clean, metallic plate (22) two sides after the oven dry evenly scribbles soldering flux, metallic plate (22) and sheet metal (21) are answered successively to be placed on again in the bottom of cooking appliance body (1) that to be 380～600 ℃ in temperature in the high frequency brazing machine be the composite cooking-vessel semi-finished product with its lead welding and shaping then.
7. the preparation method of composite cooking-vessel according to claim 6 is characterized in that: described soldering flux is a kind of among soldering flux AS-II, the soldering flux CU-I, and consumption is 0.1g～1g/cm
2
8. composite cooking-vessel that preparation method as claimed in claim 1 is made, it is characterized in that: this composite cooking-vessel comprises cooking appliance body (1) and base plate (2), described base plate (2) is from the inside to the outside by metallic plate (22) with sheet metal (21) forges by heat or soldering is combined with each other, described body (1) is two-layer or the three-layer metal layer forges by compound heat or soldering is composited, and also forges by heat between body (1) and the base plate (2) or soldering is combined with each other.
9. composite cooking-vessel according to claim 8, it is characterized in that: described sheet metal is an austenite, a kind of in martensite or the ferrite stainless steel disc, described metallic plate (22) is aluminium alloy plate or pure aluminum plate, described body (1) is to be made up of internal layer (13) and outer (11) two-layer institute from the inside to the outside, its internal layer (13) is an austenite, martensite or ferritic stainless steel metal level, outer (11) are aluminium alloy or pure aluminum metal layer, or its internal layer (13) is aluminium alloy or pure aluminum metal layer, and outer (11) are austenite, martensite or ferritic stainless steel metal level.
10. composite cooking-vessel according to claim 8, it is characterized in that: a kind of in austenite, martensite or the ferrite stainless steel disc of described sheet metal (21), described metallic plate (22) is aluminium alloy plate or pure aluminum plate, described body (1) is to be made up of internal layer (13), interlayer (12) and outer (11) three layers of institute from the inside to the outside, its internal layer (13) and outer (11) are austenite, martensite or ferritic stainless steel metal level, and its interlayer (12) is aluminium alloy or pure aluminum metal layer.
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| CN2728360Y (en) * | 2004-08-04 | 2005-09-28 | 佛山市南海冠益不锈钢制品有限公司 | Electric cooker inner container made of multilayer composite metal plate material |
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|---|---|
| CN101015892A (en) | 2007-08-15 |
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