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Bottom covering sheet and preparation method thereof

A technology of negative film and bottom plate, which is applied in the direction of special materials for cooking utensils, etc., can solve problems such as falling off, loose stainless steel plates, and affecting the use of aluminum pots, so as to reduce the gap between thermal expansion and cold contraction, save nickel metal or nickel alloy, The effect of strengthening the ability to prevent oxidation

Inactive Publication Date: 2018-09-07
ZHEJIANG COOKER KING COOKER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing aluminum pan cannot be used on the induction cooker because it does not have the function of magnetic conduction. It must be compounded with a magnetic conductor at the bottom to achieve the heating effect, that is, the bottom plate came into being.
The cladding film is the magnetizer compounded at the bottom of the pot body. The commonly used cladding film is made of stainless steel plate. This kind of steel plate is cold-pressed or hot-forged on the bottom surface of the aluminum pot. Since the expansion coefficient of aluminum and steel is almost twice the difference, When the bottom of the pan is heated above 300°C, the length or area of ​​the aluminum alloy pan body and the stainless steel plate vary greatly in the part far from the center, which is very easy to cause damage to the joint between the aluminum alloy pan body and the steel plate. Due to repeated thermal expansion and contraction during repeated use, the stainless steel plate will loosen or even fall off from the pot body, which seriously affects the use of aluminum pots

Method used

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  • Bottom covering sheet and preparation method thereof
  • Bottom covering sheet and preparation method thereof
  • Bottom covering sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, a negative-covering sheet includes a circular bottom plate 1, a perforation 3 is provided in the center of the circular bottom plate 1, and a plurality of buffer holes 2 are evenly distributed between the perforation 3 and the edge of the bottom plate 1, as figure 2 As shown, the edge of each buffer hole 2 protrudes to one side of the vertical bottom plate 1 to form a hole shoulder 201, and the hole shoulder 201 is convenient for inserting the bottom sheet into the bottom of the pot when it is attached to the bottom of the pot, so that the bottom sheet and the bottom of the pot are tightly bonded together . The buffer hole 2 is set so that when the expansion and contraction of the base plate and the bottom of the pot body are inconsistent when heated, the inconsistent deformation can be alleviated by the expansion and contraction of the buffer hole 2, and the expansion and contraction of the base plate can also be eased by the perforation 3 , s...

Embodiment 2

[0038] like figure 2 As shown, in addition to the circular bottom plate 1 , the perforated hole 3 and the buffer hole 2 , the bottom-covering sheet is provided with a plurality of outwardly opening buffer grooves 4 at intervals in the middle of the circular bottom plate 1 . The opening of the buffer groove 4 is outward, that is, a gap is formed on the edge of the negative film, so that the expansion and contraction of the edge of the negative film can be converted into the expansion and contraction of the gap, and the expansion and contraction of the negative film can be alleviated by the existence of the buffer groove 4, thereby making it easier The gap between thermal expansion and contraction between the aluminum alloy pan body and the cladding film is greatly reduced, and the defect of the arch in the middle of the integral cladding film can be completely eliminated, and the combination between the aluminum alloy pan body and the cladding film can be enhanced. Adhesion. ...

Embodiment 3

[0047] A negative film, comprising the following components by weight: C: 0.08 parts, Mn: 10 parts; Si: 4.2 parts; P: 0.017 parts; S: 0.017 parts; Cr: 15 parts; Ti: 0.42 parts; Mo: 0.7 parts; N: 0.35 parts; Zr: 0.22 parts, and the balance is iron.

[0048] A preparation method of a negative-coated film, comprising the steps of:

[0049] Step 1, taking each raw material according to weight components;

[0050] Step 2, putting the weighed raw materials into a vacuum induction furnace for smelting in turn, and blowing nitrogen gas into the molten steel after completely melting into molten steel;

[0051] Step 3, pouring the molten steel obtained in Step 2 into a mold, and casting to obtain a stainless steel workpiece;

[0052] Step 4: Take out the stainless steel workpiece formed in step 3 and perform quenching treatment; the quenching is to heat the stainless steel workpiece to 1000°C and then spray the emulsion, and the process lasts for 0.65 hours.

[0053] Step 5: Temper t...

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Abstract

The invention relates to a bottom covering sheet, which comprises a round bottom plate, wherein a through hole is arranged in the middle of the round bottom plate, a plurality of buffer holes are uniformly distributed between the through hole and the edge of the round bottom plate, the edge of the buffer hole projects toward one surface perpendicular to the bottom covering sheet to form a hole shoulder, and the bottom covering sheet comprises the following components by weight: 0.07-0.10 part of C, 9-12 parts of Mn, 4.0-5.2 parts of Si, 0.015-0.03 part of P, 0.015-0.025 part of S, 14-17 partsof Cr, 0.40-0.50 part of Ti, 0.5-1.0 part of Mo, 0.3-0.5 part of N, 0.2-0.4 part of Zr, and the balance of iron. According to the present invention, the bottom covering sheet has advantages of good corrosion resistance, good high-temperature resistance and good oxidation resistance, can be closely bonded to the bottom of the pan, cannot loosen and shed, has the ensured flatness, and cannot bend and deform.

Description

technical field [0001] The invention relates to the technical field of alloy materials, more specifically, it relates to a back-covering sheet and a preparation method thereof. Background technique [0002] Aluminum pot is a kind of pot that is widely used in family kitchens. It has the following characteristics: 1. Good plasticity, smooth surface, convenient production and processing; 2. Good heat transfer effect and high thermal efficiency; 3. Light specific gravity, the specific gravity of aluminum It is only 2.7. Therefore, under the premise of the same weight, the thickness of the aluminum pot is much thicker than that of the iron pot and the stainless steel pot, generally about 2 to 6 mm; The parts in contact will not generate local high temperature, less oil fume, environmental protection and energy saving; because of the above characteristics, it is very popular among consumers. [0003] With the development of society and the advancement of science and technology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/34C22C38/28C22C38/22C21D1/18A47J36/02
Inventor 王丽君王鹏俞慧娜
Owner ZHEJIANG COOKER KING COOKER
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