Double-sided iron nitride and titanium coating meltallizing spraying process

Abstract

The invention discloses a double-sided iron nitride and titanium coating meltallizing and spraying process which comprises the following steps: 1) preparing a composite material, 2) stamping and nitriding, 3) polishing and cleaning, 4) preparing a coating, 5) meltallizing and spraying, 6) polishing and checking, stacking low-carbon steel materials on two sides of 3003 aluminum to prepare the composite material, and then carrying out 530 DEG C high-temperature nitriding treatment on the composite material to improve the anti-rust performance of the material. Then, in order to prevent heavy metal from being separated out in the using process of a finished product of the iron nitride composite material, after the composite material is formed, a titanium metal coating material is sprayed to the inner surface of the composite material through a plasma meltallizing spraying technology, and a titanium metal coating is formed; by utilizing the characteristics of good heat resistance, excellent biocompatibility and the like of titanium metal, the high temperature resistance, corrosion resistance and the like of the composite material are effectively improved through the process, the use performance of a finished product is improved, and heavy metal precipitation of the finished product is prevented.

Description

Technical Field

[0001] The invention relates to a double-sided iron nitride and titanium coating melt spraying process. Background Art

[0002] Kitchen utensils, especially pots, are prone to sticking during use, so a non-stick coating needs to be adhered to the surface of the pot to improve the use effect of the pot. However, conventional non-stick coatings are not wear-resistant and can be easily scratched by metals. The non-stick coating is easily damaged, and the temperature must be paid attention to at all times during use. The coating is prone to decomposition under high temperature conditions and produces toxic substances. Alternatively, heavy metals may be precipitated from the composite materials used to produce the pot during use, allowing the toxic and harmful substances to be incorporated into food and consumed by the human body, causing physical harm to the user and affecting health. Summary of the invention

[0003] The present invention mainly solves the technical problems existing in the prior art, thereby providing a double-sided iron nitride and titanium coating melt spraying process that effectively improves the high temperature resistance and corrosion resistance of the finished product, ensures the use effect and performance of the finished product, effectively guarantees the use stability of the product, and increases the safety and health of users.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] A double-sided iron nitride and titanium coating melt spraying process comprises the following steps:

[0006] 1) Preparation of composite materials: First, clean both sides of 3003 aluminum, then stack low-carbon steel materials on the two sides of the cleaned 3003 aluminum, and weld the edges. After welding, input it into liquid nitrogen for cooling and rolling, and then send it out of liquid nitrogen until it cools to room temperature and then perform secondary rolling to make a composite material;

[0007] 2) Stamping nitriding: First, the composite material in step 1 is placed in a mold for stamping and forming. After forming, it is introduced into an acid solution for pickling to remove impurities, and then placed in a nitriding furnace for preliminary heating and purification. The heating temperature is 100°C-150°C, and the temperature is kept for 15 minutes. The nitriding furnace is then heated to 500°C-550°C for high temperature treatment and kept for 30 minutes to allow nitrogen to react chemically with the surface of the composite material to form a dense and hardened nitrided layer, and then an oxidation treatment is performed to produce a finished product with an oxide film;

[0008] 3) Polishing and cleaning: Use diamond abrasives to polish the surface of the prepared product through a ball mill, and then introduce the polished product into a cleaning machine for surface cleaning to remove grease and attachments on the surface of the product;

[0009] 4) Coating preparation: using powder metallurgy technology to use titanium metal as a spray base material, adding titanium metal coating composed of β-Ti, Co3Ti, CrTi4 and in-situ self-generated TiC phase, and then obtaining coating powder through a screening machine, and sintering and densification treatment of the coating powder to obtain the titanium metal coating to be sprayed;

[0010] 5) Melt spraying: The titanium metal coating prepared in step 4 is heated to a semi-molten state by a plasma arc heat source to form melted or softened fine particles, and then the fine particles are sprayed onto the surface of the finished product after cleaning in step 3 by a plasma spray gun, so that a strong and dense titanium metal coating is formed on the surface of the finished product;

[0011] 6) Polishing inspection: The finished product sprayed with titanium metal coating in step 5 is fixed in a polishing machine, and polished by a flap wheel in the polishing machine. After polishing, it is cleaned by an ultrasonic cleaning machine and then placed on a test bench for surface and sieve hole inspection.

[0012] The pickling solution in step 2 is a sulfuric acid solution with a concentration of 10%-15%, and the soaking time is 60min-90min.

[0013] The coating powder screened by the screening machine in step 4 is placed in a heating furnace, kept at a temperature of 650° C.-750° C. for 60 minutes, and then slowly cooled to room temperature to complete sintering and densification treatment.

[0014] The polishing speed of the flap wheel in the polishing machine in step 6 is 35r / min, and the particle size of the flap wheel is: 36#-40#.

[0015] The beneficial effects of the present invention are as follows: the double-sided iron nitride and titanium coating melt spraying process realizes the preparation of a double-sided iron nitride composite material, and through the characteristics of titanium metal such as low density, high strength, high specific strength, and excellent corrosion resistance, the titanium metal coating material is sprayed on the inner surface of the composite material through plasma melt spraying technology to form a titanium metal coating, so that the titanium metal coating and the iron nitride composite material are combined with each other, effectively improving the high temperature resistance and corrosion resistance of the finished product, ensuring the use effect and performance of the finished product, and also avoiding the toxic and harmful components that may be produced by conventional coatings due to high temperature, preventing the precipitation of heavy metals that may occur during use, effectively ensuring the stability of product use, and increasing the safety and health of users. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of this patent.

[0017] A double-sided iron nitride and titanium coating melt spraying process comprises the following steps:

[0018] 1) Preparation of composite materials: First, clean both sides of 3003 aluminum, then stack low-carbon steel materials on the two sides of the cleaned 3003 aluminum, and weld the edges. After welding, input it into liquid nitrogen for cooling and rolling, and then send it out of liquid nitrogen until it cools to room temperature and then roll it for a second time to make a composite material, so that the low-carbon steel can be firmly attached to the two sides of the rust-proof aluminum. Not only the low-carbon steel ensures the surface strength of the composite material, but also the sandwich design of the rust-proof aluminum ensures the thermal conductivity of the composite material, thereby improving the use effect;

[0019] 2) Stamping nitriding: First, the composite material in step 1 is placed in a mold for stamping molding, and after molding, it is introduced into an acidic solution for pickling to remove impurities. The pickling solution is a sulfuric acid solution with a concentration of 10%-15%, and the soaking time is 60min-90min. Then, it is placed in a nitriding furnace for preliminary heating and purification. The heating temperature is 100℃-150℃, and the temperature is kept for 15min. Then, the nitriding furnace is further heated to 500℃-550℃ for high-temperature treatment, and the temperature is kept for 30min to allow the nitrogen element to react chemically with the surface of the composite material to generate a dense and hardened nitride layer, and then an oxidation treatment is performed to produce a finished product with an oxide film. The stains or foreign matter that may be attached to the surface of the composite material are effectively removed by pickling and preheating, and its surface is purified. Then, the nitrogen element is chemically reacted with the surface of the composite material through high-temperature treatment, so as to produce a dense hardened layer on the surface of the composite material, and further improve the corrosion resistance and wear resistance of the composite material;

[0020] 3) Polishing and cleaning: Use diamond abrasive to polish the surface of the prepared product through a ball mill, and then introduce the polished product into a cleaning machine for surface cleaning to remove grease and attachments on the surface of the product. Through polishing and cleaning, possible complicated foreign matter in the previous operation of the composite material is removed again, ensuring the compactness and firmness of the subsequent coating spraying;

[0021] 4) Coating preparation: Powder metallurgy technology is used to take titanium metal as the spray base material, and titanium metal coating composed of β-Ti, Co3Ti, CrTi4 and in-situ self-generated TiC phase is added, and then the coating powder is obtained by a sieving machine. The coating powder screened by the sieving machine is placed in a heating furnace, kept at a temperature of 650°C-750°C for 60 minutes, and then slowly cooled to room temperature to complete sintering and densification treatment to obtain the titanium metal coating to be sprayed, so that the titanium metal coating can be more firmly adhered after spraying, and the stability of the titanium metal coating powder after spraying is effectively improved;

[0022] 5) Melt spraying: The titanium metal coating prepared in step 4 is heated to a semi-molten state by a plasma arc heat source to form melted or softened fine particles, and then the fine particles are sprayed onto the surface of the finished product after cleaning in step 3 by a plasma spray gun, so that a strong and dense titanium metal coating is formed on the surface of the finished product, which effectively utilizes the heat resistance and excellent biocompatibility of titanium metal, improves the performance of the finished product, and prevents the precipitation of heavy metals in the finished product;

[0023] 6) Polishing inspection: fix the finished product sprayed with titanium metal coating in step 5 into the polishing machine, and polish the surface of the finished product with the flap wheel of the polishing machine. The polishing speed of the flap wheel is 35r / min, and the particle size of the flap wheel is: 36#-40#. Polishing is performed with the flap wheel in the polishing machine. After polishing, it is cleaned with an ultrasonic cleaning machine and then placed on the inspection table for surface and sieve inspection. The polishing process ensures the use effect of the surface coating of the finished product, improves the aesthetics of the finished product, and improves its performance.

[0024] The beneficial effects of the present invention are as follows: the double-sided iron nitride and titanium coating melt spraying process realizes the preparation of a double-sided iron nitride composite material, and through the characteristics of titanium metal such as low density, high strength, high specific strength, and excellent corrosion resistance, the titanium metal coating material is sprayed on the inner surface of the composite material through plasma melt spraying technology to form a titanium metal coating, so that the titanium metal coating and the iron nitride composite material are combined with each other, effectively improving the high temperature resistance and corrosion resistance of the finished product, ensuring the use effect and performance of the finished product, and also avoiding the toxic and harmful components that may be produced by conventional coatings due to high temperature, preventing the precipitation of heavy metals that may occur during use, effectively ensuring the stability of product use, and increasing the safety and health of users.

[0025] What has been described above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be conceived without creative work should be included in the protection scope of the present invention.

Claims

1. A double-sided iron nitride and titanium coating melt spraying process, characterized in that: The steps include: 1) Preparation of composite materials: First, clean both sides of 3003 aluminum, then stack low-carbon steel materials on the two sides of the cleaned 3003 aluminum, and weld the edges. After welding, input it into liquid nitrogen for cooling and rolling, and then send it out of liquid nitrogen until it cools to room temperature and then perform secondary rolling to make a composite material; 2) Stamping nitriding: First, the composite material in step 1 is placed in a mold for stamping and forming. After forming, it is introduced into an acid solution for pickling to remove impurities, and then placed in a nitriding furnace for preliminary heating and purification. The heating temperature is 100°C-150°C, and the temperature is kept for 15 minutes. The nitriding furnace is then heated to 500°C-550°C for high temperature treatment and kept for 30 minutes to allow nitrogen to react chemically with the surface of the composite material to form a dense and hardened nitrided layer, and then an oxidation treatment is performed to produce a finished product with an oxide film; 3) Polishing and cleaning: Use diamond abrasives to polish the surface of the prepared product through a ball mill, and then introduce the polished product into a cleaning machine for surface cleaning to remove grease and attachments on the surface of the product; 4) Coating preparation: using powder metallurgy technology to use titanium metal as a spray base material, adding titanium metal coating composed of β-Ti, Co3Ti, CrTi4 and in-situ self-generated TiC phase, and then obtaining coating powder through a screening machine, and sintering and densification treatment of the coating powder to obtain the titanium metal coating to be sprayed; 5) Melt spraying: The titanium metal coating prepared in step 4 is heated to a semi-molten state by a plasma arc heat source to form melted or softened fine particles, and then the fine particles are sprayed onto the surface of the finished product after cleaning in step 3 by a plasma spray gun, so that a strong and dense titanium metal coating is formed on the surface of the finished product; 6) Polishing inspection: The finished product sprayed with titanium metal coating in step 5 is fixed in a polishing machine, and polished by a flap wheel in the polishing machine. After polishing, it is cleaned by an ultrasonic cleaning machine and then placed on a test bench for surface and sieve hole inspection.

2. A double-sided iron nitride and titanium coating melt spraying process according to claim 1, characterized in that: The pickling solution in step 2 is a sulfuric acid solution with a concentration of 10%-15%, and the soaking time is 60min-90min.

3. A double-sided iron nitride and titanium coating melt spraying process according to claim 1, characterized in that: The coating powder screened by the screening machine in step 4 is placed in a heating furnace, kept at a temperature of 650° C.-750° C. for 60 minutes, and then slowly cooled to room temperature to complete sintering and densification treatment.

4. A double-sided iron nitride and titanium coating melt spraying process according to claim 1, characterized in that: The polishing speed of the flap wheel in the polishing machine in step 6 is 35r / min, and the particle size of the flap wheel is: 36#-40#.