A double-sided nitrided iron and titanium coating fusion spraying process

Abstract

The application discloses a double-sided nitrogenized iron and titanium coating melting spraying process, which comprises the following steps: 1) composite material preparation, 2) stamping nitrogenization, 3) polishing and cleaning, 4) coating preparation, 5) melting spraying, 6) polishing and checking, low-carbon steel material is stacked on both sides of 3003 aluminum to form a composite material, the composite material is subjected to high-temperature nitrogenization treatment at 530 DEG C to increase the rust-proof performance of the material, and the preparation of the double-sided nitrogenized iron composite material is realized, then, in order to prevent the heavy metal release of the nitrogenized iron composite material product during use, after the composite material is formed, titanium metal coating material is sprayed on the inner surface of the composite material by means of plasma melting spraying technology to form a titanium metal coating, and the titanium metal coating has the characteristics of good heat resistance and excellent biological compatibility, so that the high-temperature resistance, corrosion resistance and other abilities of the composite material are effectively improved by the process, the use performance of the product is improved, and the heavy metal release of the product is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to a double-sided nitrided iron and titanium coating melt spraying process. BACKGROUND

[0002] Kitchen utensils, especially pots, are prone to sticking during use, so it is necessary to adhere a non-stick coating to the surface of the pot to improve the use effect of the pot. However, conventional non-stick coatings are not resistant to wear and are easily scratched by metal, which can damage the non-stick coating. In addition, attention must be paid to the temperature during use, as the coating can easily decompose at high temperatures, producing toxic substances. Alternatively, the composite material used to produce the pot can release heavy metals during use, causing toxic and harmful substances to be incorporated into food and ingested by the human body, causing physical harm and affecting health. SUMMARY

[0003] The present application mainly solves the technical problems existing in the prior art, thereby providing a double-sided nitrided iron 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 protects the use stability of the product, and increases the safety and health of the user.

[0004] To solve the above problems, the present application adopts the following technical scheme:

[0005] A double-sided nitrided iron and titanium coating melt spraying process, comprising the following steps:

[0006] 1) Composite material preparation: first clean both sides of the 3003 aluminum, then stack low-carbon steel materials on both sides of the cleaned 3003 aluminum, and weld the edges. After welding, input into liquid nitrogen for cooling and rolling, then send out of the liquid nitrogen until cooled to room temperature for secondary rolling to form a composite material;

[0007] 2) Punch nitriding: first put the composite material in step 1 into a mold for punch forming, then introduce into an acid solution for pickling to remove impurities, and then put into a nitriding furnace for preliminary heating and purification. The heating temperature is 100-150 DEG C, and the holding time is 15 min. Then continue to heat the nitriding furnace to 500-550 DEG C for high-temperature treatment, and hold for 30 min. Let the nitrogen element react with the surface of the composite material to form a dense hardened nitrided layer, and then perform oxidation treatment to produce a finished product with an oxidation film;

[0008] 3) Polishing and cleaning: use diamond abrasive to polish the surface of the prepared finished product by ball mill, then introduce the polished finished product into a cleaning machine for surface cleaning to remove oil and attachments on the surface of the finished product;

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

[0010] 5) Melting spraying: heating the titanium metal coating prepared in step 4 to a semi-molten state through a plasma arc heat source, then forming fine particles that are melted or softened, and then spraying the fine particles to the surface of the product after cleaning in step 3 through a plasma spray gun to form a layer of solid and dense titanium metal coating on the surface of the product;

[0011] 6) Polishing inspection: fixing the product with the titanium metal coating sprayed in step 5 to a polishing machine, polishing through a thousand-leaf wheel in the polishing machine, cleaning through an ultrasonic cleaning machine after polishing, and then placing on an inspection table for surface and mesh inspection.

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

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

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

[0015] The double-sided nitrided iron and titanium coating melting spraying process realizes the preparation of double-sided nitrided iron composite material, and through the characteristics of titanium metal such as small density, high strength, large specific strength and excellent corrosion resistance, titanium metal coating material is sprayed on the inner surface of the composite material through plasma melting spraying technology to form a titanium metal coating, so that the titanium metal coating and the nitrided iron 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 avoiding the toxic and harmful components that may be produced by the conventional coating due to high temperature, preventing the release of heavy metals that may occur during use, effectively ensuring the use stability of the product, and increasing the safety and health of the user. DETAILED DESCRIPTION

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

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

[0018] 1) Composite material preparation: first clean both sides of 3003 aluminum, then stack low carbon steel material on both sides of the cleaned 3003 aluminum, and weld the edges, then input into liquid nitrogen for cooling and rolling, then take out from the liquid nitrogen until cooled to room temperature for secondary rolling to make the composite material, so that the low carbon steel can be firmly attached to both sides of the rust-proof aluminum, not only ensuring the surface use strength of the composite material through the low carbon steel, but also ensuring the heat conduction performance of the composite material through the sandwich design of the rust-proof aluminum, improving the use effect;

[0019] 2) Punch nitriding: first put the composite material in step 1 into a mold for punch forming, then introduce into an acid solution for pickling to remove impurities, the pickling solution is a 10%-15% sulfuric acid solution, the soaking time is 60-90 min, then put into a nitriding furnace for preliminary heating and purification, the heating temperature is 100-150℃, and the temperature is kept for 15 min, then continue to heat the nitriding furnace to 500-550℃ for high temperature treatment, keep the temperature for 30 min, let the nitrogen element react with the surface of the composite material to form a dense hardened nitriding layer, then perform oxidation treatment to produce a finished product with an oxidation film, the acid pickling, preheating effectively removes the stains or foreign matter that may be attached to the surface of the composite material, purifies the surface, and then the high temperature treatment allows the nitrogen element to react with the surface of the composite material to produce a dense hardened layer on the surface of the composite material, further improving the corrosion resistance and wear resistance of the composite material;

[0020] 3) Polishing and cleaning: the prepared finished product is polished on the surface by a ball mill with diamond abrasive, then the polished finished product is introduced into a cleaning machine for surface cleaning to remove oil and attachments on the surface of the finished product, and the polishing and cleaning again remove the complex foreign matter that may be present on the composite material in the previous operation, ensuring the tightness and firmness of the subsequent coating spraying;

[0021] 4) Coating preparation: using powder metallurgy technology to take titanium metal as the spraying base material, adding titanium metal coating composed of beta-Ti, Co3Ti, CrTi4 and in-situ self-birth TiC phase, and then obtaining the coating powder through a screening machine, placing the screened coating powder in a heating furnace, keeping the temperature at 650-750 DEG C for 60 min, slowly cooling to room temperature to complete sintering and densification treatment, and obtaining the titanium metal coating to be sprayed, so that the titanium metal coating can be more firmly pasted after spraying, and the stability of the titanium metal coating powder after spraying is effectively improved;

[0022] 5) Melting spraying: heating the titanium metal coating prepared in step 4 to a semi-molten state through a plasma arc heat source, forming fine particles that are melted or softened, and then spraying the fine particles to the surface of the product after cleaning in step 3 through a plasma spray gun, so that a firm and dense titanium metal coating is formed on the surface of the product, the heat-resistant performance, excellent biocompatibility and other characteristics of titanium metal are effectively utilized, the use performance of the product is improved, and heavy metal precipitation of the product is prevented;

[0023] 6) Polishing inspection: fixing the product with the titanium metal coating sprayed in step 5 to a polishing machine, polishing the surface of the product through the polishing machine, the polishing speed of the polishing machine is 35 r / min, the granularity of the polishing machine is 36#-40#, polishing the product through the polishing machine, cleaning the product through an ultrasonic cleaning machine after polishing, and then placing the product on an inspection table for surface and mesh inspection, the polishing process ensures the use effect of the surface coating of the product, improves the appearance of the product, and improves the use performance of the product.

[0024] The beneficial effects of the present application are: the double-sided nitrided iron and titanium coating melting spraying process realizes the preparation of double-sided nitrided iron composite material, and through the characteristics of small density, high strength, large specific strength and excellent corrosion resistance of titanium metal, the titanium metal coating material is sprayed on the inner surface of the composite material through the plasma melting spraying technology, a titanium metal coating is formed, the titanium metal coating and the nitrided iron composite material are combined with each other, the high temperature resistance and corrosion resistance of the finished product are effectively improved, the use effect and use performance of the finished product are ensured, the toxic and harmful components that may be produced by the conventional coating due to high temperature are avoided, heavy metal precipitation that may occur during use is prevented, the use stability of the product is effectively ensured, and the use safety and health of the user are increased.

[0025] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements without creative labor should be covered in the protection scope of the present application.

Claims

1. A dual-sided nitrided iron and titanium coating fusion spray process characterized by, It comprises the following steps: 1) composite material preparation: first clean both sides of 3003 aluminum, then stack low-carbon steel material on both sides of the cleaned 3003 aluminum, weld the edges, input into liquid nitrogen for cooling and rolling, then take out from the liquid nitrogen until cooled to room temperature, and then perform secondary rolling to make the composite material; 2) stamping nitriding: first put the composite material in step 1 into a mold for stamping forming, then introduce into an acidic solution for pickling to remove impurities, then put into a nitriding furnace for preliminary heating and purification, the heating temperature is 100-150℃, and the holding time is 15 min, then continue heating the nitriding furnace to 500-550℃ for high-temperature treatment, and the holding time is 30 min, so that the nitrogen element reacts with the surface of the composite material to form a dense hardened nitriding layer, and then perform oxidation treatment to produce a finished product with an oxidation film; 3) polishing and cleaning: use diamond abrasive to polish the surface of the prepared finished product by a ball mill, then introduce the polished finished product into a cleaning machine for surface cleaning to remove oil and attachments on the surface of the finished product; 4) coating preparation: use powder metallurgy technology to prepare a titanium metal coating by adding β-Ti, Co3Ti, CrTi4 and in-situ TiC phase as the titanium metal coating, then pass through a screening machine to obtain coating powder, and perform sintering and densification treatment on the coating powder to obtain the titanium metal coating to be sprayed; 5) melt spraying: heat the titanium metal coating prepared in step 4 to a semi-molten state by a plasma arc heat source to form fine particles, then spray the fine particles to the surface of the finished product cleaned in step 3 by a plasma spray gun to form a solid and dense titanium metal coating on the surface of the finished product; 6) polishing and inspection: fix the finished product with the titanium metal coating sprayed in step 5 to a polishing machine, polish by the thousand-leaf wheel in the polishing machine, clean by an ultrasonic cleaning machine after polishing, and then place on an inspection table for surface and mesh inspection.

2. A process for double sided nitrided iron and titanium coating by fusion spraying as claimed in claim 1 wherein: The pickling solution in step 2 is a sulfuric acid solution with a concentration of 10%-15%, and the soaking time is 60-90 min.

3. A process for double sided nitrided iron and titanium coating by fusion spraying as claimed in claim 1 wherein: The coating powder screened by the screening machine in step 4 is placed in a heating furnace, and the sintering and densification treatment is completed by slowly cooling to room temperature at a temperature of 650-750℃ for 60 min.

4. A process for duplex nitrided iron and titanium coating by fusion spraying as claimed in claim 1 wherein: The polishing speed of the thousand-leaf wheel in the polishing machine in step 6 is 35 r / min, and the particle size of the thousand-leaf wheel is 36-40#.