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A magnetically permeable coating with dense structure and its preparation method

A coating and magnetic conductivity technology, applied in the direction of magnetic objects, magnetic materials, electric/magnetic/electromagnetic heating, etc., can solve the problems of decreased electromagnetic heating eddy current effect, decreased block compactness, decreased heating power, etc., to improve the conductivity. Magnetic coating bonding force and electromagnetic heating power, not easy to fall off, strong bonding force

Active Publication Date: 2020-04-24
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two processes cannot solve the problem of the high-position double-bottomed stainless steel plate of the pot body, and the electromagnetic heating power is relatively small.
Especially for the latter riveting process, when the iron plate (or 430 stainless steel) composite process is carried out on the aluminum pot bottom, it is necessary to open multiple holes on the iron plate (or 430 stainless steel), but this will reduce the compactness of the block. The density of the cutting magnetic induction line decreases, resulting in a decrease in the eddy current effect of its electromagnetic heating, and a corresponding decrease in heating power

Method used

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  • A magnetically permeable coating with dense structure and its preparation method
  • A magnetically permeable coating with dense structure and its preparation method

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preparation example Construction

[0053] The invention also discloses a method for preparing a magnetic conductive coating with a dense structure, which comprises the following steps: cold spraying the magnetic conductive metal powder on the surface of the structure to be sprayed by using a working gas.

[0054] The working gas is one or more of air, helium and nitrogen. The spray pressure of the cold spray is 1-3.5Mpa. The spray temperature of the cold spray is 573-1273K. The gas velocity of the cold spraying is 1~2.4m 3 / min. The conveying speed of the cold sprayed magnetic conductive powder is 5-15kg / h. The spray distance of the cold spray is 10-50 mm. The power consumption of the cold spraying is 15-55kW. The magnetically permeable metal is selected from Fe, Ni, Co, Fe-Si, stainless steel, or a mixture of several. The powder particle size of the magnetically conductive metal is 1-50 μm. The thickness of the magnetic conductive coating is 0.1-0.6 mm.

[0055] Further, the above process conditions ma...

Embodiment 1

[0063] A pot body includes a pot body and a magnetic conductive coating, the magnetic conductive coating is located on the outer surface of the pot body. The material of the pot body is aluminum alloy.

[0064] The magnetic conductive coating is prepared on the pot body by the cold spraying process, which includes the following steps:

[0065] 1. Degreasing and degreasing the outer surface of the pot body to be sprayed;

[0066] 2. Cold spray the magnetically conductive metal powder on the outer surface of the pot body through the working gas, and the magnetically conductive metal powder forms a magnetically conductive coating on the surface of the pot body. The specific process parameters are:

[0067] (1) The magnetic conductive powder is selected from Fe powder with a purity of 99.0-99.8%, and the powder particle size is 10-20 μm; the working gas is high-purity nitrogen, the purity of nitrogen is 99.99%, and the spraying distance is 25-30mm; spraying temperature ( That is...

Embodiment 2

[0070] A pot body includes a pot body and a magnetic conductive coating, the magnetic conductive coating is located on the outer surface of the pot body. The material of the pot body is 304 stainless steel.

[0071] The magnetic conductive coating is prepared on the pot body by the cold spraying process, which includes the following steps:

[0072] 1. Use a masking jig to cover the position where the outer surface of the pot body to be sprayed does not need to be sprayed;

[0073] 2. Cold-spray the magnetically conductive metal powder on the surface of the pot body through the working gas, and the magnetically conductive metal powder forms a magnetically conductive coating on the surface of the pot body. The specific process parameters are:

[0074] (1) The magnetic conductive powder is selected from Fe powder with a purity of 99.0-99.8%, and the powder particle size is 10-20 μm; the working gas is high-purity nitrogen, the purity of nitrogen is 99.99%, and the spraying dista...

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Abstract

The invention relates to a densely structured magnetically permeable coating and a preparation method thereof. A magnetically permeable coating with a dense structure is applied as a layered coating on the surface of a base material. The magnetically permeable coating is made by a cold spraying process, and the porosity of the magnetically permeable coating is 0.05-0.25%. The magnetically conductive coating of the present invention has the characteristics of high density, strong binding force, and is not easy to fall off, and has a porosity of 0.05 to 0.25%, which has the beneficial effect of improving the binding force of the magnetically conductive coating and electromagnetic heating power, which is lower than this range , it will lead to the problem of difficulty in the implementation of the process; if it is higher than this range, it will lead to the problem of the decrease of the bonding force of the magnetic permeable coating and the electromagnetic heating power. The invention also relates to a preparation method of a magnetically conductive coating with a dense structure, as well as a pot body and a cooking utensil with the magnetically conductive coating.

Description

technical field [0001] The invention relates to the technical field of cooking utensils, in particular to a magnetic conductive coating with a dense structure and a preparation method thereof. Background technique [0002] Aluminum alloy, 304 stainless steel and other materials are widely used in household appliances, but the electromagnetic heating function of these non-magnetic or weakly magnetically conductive pots is not ideal. For example, aluminum IH heating pressure cooker or frying pan, etc., the traditional process part adopts hot pressing brazing or riveting to prepare a layer of magnetically conductive 430 stainless steel sheet at the bottom of the base pot. However, these two processes cannot solve the problem of the high-position double bottom stainless steel plate of the pot body, and the electromagnetic heating power is small. Especially in the latter riveting process, when the iron plate (or 430 stainless steel) composite process is performed on the bottom o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04A47J36/02
CPCA47J36/02C23C24/04H01F1/015H05B6/1245Y10S220/912
Inventor 李康曹达华李洪伟杨玲李兴航周虎
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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