Magnetic conducting coating with compact structure and preparation method thereof

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

Active Publication Date: 2017-08-25
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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  • Description
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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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  • Magnetic conducting coating with compact structure and preparation method thereof
  • Magnetic conducting coating with compact structure and preparation method thereof
  • Magnetic conducting coating with compact structure and preparation method thereof

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preparation example Construction

[0052] The invention also discloses a preparation method of a magnetically conductive coating with a dense structure, which includes the following steps: cold spraying the powder of the magnetically conductive metal on the surface of the structure to be sprayed through the working gas.

[0053] The working gas is one or more of air, helium and nitrogen. The injection pressure of the cold spraying is 1-3.5Mpa. The spraying temperature of the cold spraying is 573-1273K. The gas velocity of the cold spraying is 1~2.4m 3 / min. The conveying speed of the magnetically conductive powder for cold spraying is 5-15 kg / h. The spraying distance of the cold spraying is 10-50 mm. The power consumption of the cold spraying is 15-55kW. The magnetically permeable metal is selected from one or a mixture of Fe, Ni, Co, Fe-Si, and stainless steel. The particle size of the magnetically permeable metal powder is 1-50 μm. The thickness of the magnetically permeable coating is 0.1-0.6 mm.

[...

Embodiment 1

[0062] A pot body includes a pot body and a magnetically conductive coating, and the magnetically conductive coating is located on the outer surface of the pot body. The material of the pot body is aluminum alloy.

[0063] Utilize the cold spray process to prepare the magnetically conductive coating on the pot body, including the following steps:

[0064] 1. Degrease and degrease the outer surface of the pot body to be sprayed;

[0065] 2. The powder of the magnetically conductive metal is cold-sprayed on the outer surface of the pot body through the working gas, and the powder of the magnetically conductive metal forms a magnetically conductive coating on the surface of the pot body. The specific process parameters are:

[0066] (1) The magnetically 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 adopts high-purity nitrogen, and the purity of nitrogen is 99.99%, and the spraying distance is 2...

Embodiment 2

[0069] A pot body includes a pot body and a magnetically conductive coating, and the magnetically conductive coating is located on the outer surface of the pot body. The material of the pot body is 304 stainless steel.

[0070] Utilize the cold spray process to prepare the magnetically conductive coating on the pot body, including the following steps:

[0071] 1. On the outer surface of the pot body to be sprayed, the position that does not need to be sprayed is shielded with a shielding fixture;

[0072] 2. The powder of the magnetically conductive metal is cold-sprayed on the surface of the pot body through the working gas, and the powder of the magnetically conductive metal forms a magnetically conductive coating on the surface of the pot body. The specific process parameters are:

[0073] (1) The magnetically 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 adopts high-purity nitrogen, and ...

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Abstract

The invention relates to a magnetic conducting coating with a compact structure and a preparation method thereof. The magnetic conducting coating with the compact structure is applied on the surface of a base material as a layered coating, the magnetic conducting coating is prepared through a cold spray process, and the porosity of the magnetic conducting coating ranges from 0.05% to 0.25%. The magnetic conducting coating has the characteristics of being high in compactness, strong in binding force and not easy to fall off, the porosity ranges from 0.05% to 0.25%, and the magnetic conducting coating has the beneficial effect of improving the binding force of the magnetic conducting coating and the electromagnetic heating power; if the porosity is lower than the range, the technological process is difficult to implement; and if the porosity is higher than the range, the bonding force of the magnetic conducting coating and the electromagnetic heating power are reduced. The invention further relates to the preparation method of the magnetic conducting coating with the compact structure, and relates to a pot body and a cooking utensil containing the magnetic conducting coating.

Description

technical field [0001] The invention relates to the technical field of pots, in particular to a magnetically conductive coating with a dense structure and a preparation method thereof. Background technique [0002] Materials such as aluminum alloy and 304 stainless steel are widely used in household electrical appliances, but the electromagnetic heating function of these non-magnetic or weakly magnetically permeable pots is not ideal. For example, for aluminum IH heating pressure cookers or frying pans, etc., the traditional process part uses hot-press brazing or riveting to prepare a layer of magnetically conductive 430 stainless steel sheet at the bottom of the base pan. But these two kinds of processes can't solve the problem of the high-position multiple-bottom stainless steel plate of the pot body, and its electromagnetic heating power is less. Especially for the latter riveting process, when the iron plate (or 430 stainless steel) composite process is carried out on t...

Claims

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Application Information

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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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