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Stainless iron pan acid-proof material, preparation method of stainless iron pan acid-proof material and stainless iron container

A technology of acid resistance and stainless iron, which is applied in the direction of special materials for cooking utensils, metal material coating process, superimposed layer plating, etc. It can solve the problems of pot body perforation, trachoma formation, and corrosion resistance, so as to reduce trachoma and perforation, excellent acid resistance

Inactive Publication Date: 2018-09-07
武汉安在厨具有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the nitrogen-treated real stainless iron pans on the market have poor acid resistance, and are not resistant to acidic foods with a pH value of less than 7, such as vinegar and sauerkraut, during cooking.
During use, the part of the inner surface of the pot that is in contact with food is prone to pitting corrosion to form sand holes, which eventually leads to perforation of the pot body
Moreover, at present, the surface structure of the base material before nitriding of iron pans cannot be uniform, and there will always be some defects, which makes the current true stainless iron pans more prone to blisters and perforations during use.

Method used

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  • Stainless iron pan acid-proof material, preparation method of stainless iron pan acid-proof material and stainless iron container
  • Stainless iron pan acid-proof material, preparation method of stainless iron pan acid-proof material and stainless iron container
  • Stainless iron pan acid-proof material, preparation method of stainless iron pan acid-proof material and stainless iron container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] The inner surface of the base layer of the pot body made of steel is sandblasted to increase the roughness of the inner surface of the pot body, and the Ra is 10um; the inner surface of the pot body is coated with a layer of 200um titanium and / or titanium alloy layer, thermal spraying adopts arc thermal spraying; the surface of the titanium or titanium alloy layer obtained by thermal spraying is polished to reduce the surface roughness of the pot body.

[0079] Carry out nitriding treatment on the pot body, the nitriding method is carried out according to the gas nitriding method, the method is as follows: use the well-type resistance furnace to process, place the product pot mouth downward on the special nitriding fixture, hoist it into the well-type nitriding furnace, Cover the furnace cover; vacuumize the nitriding furnace to a vacuum degree of 0.02MPa, then feed ammonia gas to make the pressure in the furnace reach a positive pressure of 0.001MPa, and keep feeding ...

Embodiment 2

[0083] The inner surface of the base layer of the pot body made of steel is sandblasted to increase the roughness of the inner surface of the pot body, and the Ra is 8um; the inner surface of the pot body is coated with a layer of 160um titanium and / or titanium alloy layer, thermal spraying adopts arc thermal spraying; the surface of the titanium or titanium alloy layer obtained by thermal spraying is polished to reduce the surface roughness of the pot body.

[0084] Carry out nitriding treatment on the pot body, the nitriding method is carried out according to the gas nitriding method, the method is as follows: use the well-type resistance furnace to process, place the product pot mouth downward on the special nitriding fixture, hoist it into the well-type nitriding furnace, Cover the furnace cover; vacuumize the nitriding furnace to a vacuum degree of 0.03MPa, then feed ammonia gas to make the pressure in the furnace reach a positive pressure of 0.001MPa, and keep feeding a...

Embodiment 3

[0088] The inner surface of the base layer of the pot body made of cast iron is sandblasted to increase the roughness of the inner surface of the pot body, and the Ra is 6um; the inner surface of the pot body is coated with a layer of 120um titanium and / or titanium alloy layer, flame thermal spraying is used for thermal spraying; the surface of the titanium or titanium alloy layer obtained by thermal spraying is polished to reduce the surface roughness of the inner pot.

[0089] Carry out nitriding treatment on the pot body, the nitriding method is carried out according to the gas nitriding method, the method is as follows: use the well-type resistance furnace to process, place the product pot mouth downward on the special nitriding fixture, hoist it into the well-type nitriding furnace, Cover the furnace cover; vacuumize the nitriding furnace to a vacuum degree of 0.04MPa, then feed ammonia gas to make the pressure in the furnace reach a positive pressure of 0.002MPa, and ke...

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Abstract

The invention belongs to the technical field of iron pan preparation, and particularly relates to a stainless iron pan acid-proof material, a preparation method of the stainless iron pan acid-proof material and a stainless iron container. The inner surface of a pan body is coated with a titanium nitride layer. The inner surface of the pan body is coated with titanium and / or titanium alloy layer through a thermal spraying method, and the pan body is subjected to nitriding treatment or nitrocarburizing treatment. According to the prepared stainless iron pan acid-proof material, the acid resistance of stainless iron pans subjected to nitriding treatment is improved, the problems of sand holes and punch holes in the application process of nitrided iron pans are reduced, and the influence of base material surface structure defects on the performance of iron pans is reduced.

Description

technical field [0001] The invention relates to the technical field of iron pan preparation, in particular to an acid-resistant material for a stainless iron pan, a preparation method thereof, and a stainless iron container. Background technique [0002] At present, there is a kind of real stainless iron pan that has been nitrided on the market. This type of iron pan is formed by cold stamping of low-carbon steel plate or cast iron. After the inner and outer surfaces are polished, they are nitrided and oxidized. Treated to prevent rust. [0003] However, the nitrogen-treated real stainless iron pans on the market have poor acid resistance, and are not resistant to the corrosion of acidic foods with a pH value of less than 7, such as vinegar and sauerkraut, during cooking. During use, pitting corrosion is prone to occur on the part of the inner surface of the pot that is in contact with food, forming trachoma, which eventually leads to perforation of the pot body. Moreover,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/129C23C4/131C23C4/134C23C8/24C23C8/30C23C28/00A47J36/04
CPCC23C4/06A47J36/04C23C4/129C23C4/131C23C4/134C23C8/24C23C8/30C23C28/345
Inventor 黄恩点
Owner 武汉安在厨具有限公司
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