Stainless steel production process, stainless steel material and applications having a surface with a texture

Abstract

This invention discloses a production process, materials, and applications for stainless steel with textured surfaces, belonging to the field of stainless steel surface treatment technology. The process includes the following steps: after degreasing and cleaning, the stainless steel sheet undergoes a brightening treatment using a grinding fluid; wire drawing; embossing the stainless steel sheet using an embossing machine to create patterns on the surface; passivation treatment; slitting and cutting the stainless steel coil; and preparing a wear-resistant coating on the surface of the part blank. The stainless steel parts obtained by this invention have embossed patterns on their surface, resulting in an aesthetically pleasing appearance. Even after the wear-resistant coating is applied, the embossed patterns remain, further improving corrosion resistance and wear resistance. Simultaneously, the stainless steel parts are less reflective, making them ideal for manufacturing automotive interior speaker grilles. This enhances the overall design of the vehicle interior, improves audio quality, and reduces the risk of glare from interior lights, thus increasing safety.

Description

Technical Field

[0001] This invention relates to the field of stainless steel surface treatment technology, specifically to stainless steel production processes, stainless steel materials, and applications with textured surfaces. Background Technology

[0002] Currently, stainless steel production technology is relatively mature, and the production of stainless steel parts generally includes processes such as polishing, wire drawing, passivation, and stamping. Some textured stainless steel parts have also appeared on the market.

[0003] For example, invention disclosure CN101733613A discloses a method for manufacturing a stainless steel cabinet with a textured surface. It is made of textured steel and protected by a transparent varnish.

[0004] However, due to the high requirements for appearance and corrosion and wear resistance of stainless steel parts such as automotive interior speaker grilles, transparent paint is difficult to meet these requirements. Furthermore, using transparent paint cannot solve the safety hazard caused by glare from automotive interior speaker grilles. Additionally, the surface treatment methods for textured stainless steel parts also need further improvement.

[0005] Based on this, the present invention designs a stainless steel production process, stainless steel material and application with textured surface to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a stainless steel production process with textured surface, stainless steel materials, and applications.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The manufacturing process for stainless steel with textured surfaces includes the following steps: I. Selection of Stainless Steel Sheets; 2. After degreasing and cleaning, the stainless steel plate is polished with grinding fluid. 3. After cleaning, stainless steel plates are brushed using a rolling mill. 4. Embossing is performed on stainless steel sheets using an embossing machine to create patterns and designs on the surface of the stainless steel sheets. 5. The stainless steel plate is then immersed in a passivating agent for passivation treatment; 6. Use a stainless steel slitting and leveling blanking device to slitting and blanking the stainless steel coils, and cut the stainless steel coils to obtain part blanks. 8. Prepare a wear-resistant coating with a thickness of 40~65μm on the surface of the part blank, specifically as follows: (1) The wear-resistant coating is composed of Ti, Mo, Nb, Zr, Cr and Fe, wherein the Ti content is not less than 5% and the Cr content is not less than 15%; (2) Preheat the automotive interior speaker grille blank at 200~320℃ for 20~35min, and then cool it to 120~180℃; (3) A wear-resistant coating is generated on the surface of the part blank using a vacuum evaporation equipment.

[0008] Going a step further, choose 304 or 201 stainless steel 2Nb sheet.

[0009] Furthermore, the grinding fluid comprises the following raw materials in weight percentages: 4.3-8% diisooctyl phosphate, 1.6-3% monoethanolamine benzoate, 2.3-4% n-butanol, 22-28% phosphoric acid, 25-35% sulfuric acid, and the balance being ethanol.

[0010] Furthermore, the light-brightening parameters are: temperature 50~62℃, voltage 22~31V, and time 25~30s.

[0011] Furthermore, in step three, the stainless steel plate is immersed in a passivating agent at 35~40℃ and left to stand for 1~3 minutes.

[0012] Furthermore, step seven involves using an etching process to etch a mesh pattern at the designed location on the part blank.

[0013] Furthermore, the passivating agent comprises the following raw materials in weight percentages: 16-20.8% quaternary ammonium salt, 13-20.5% triazole derivative, 6-7.3% sodium fluorozirconate, 4-5.8% p-dimethylaminobenzaldehyde, 5-7.1% disodium EDTA, 8.2-10.4% 6-aminopurine phosphate, with the balance being water.

[0014] Furthermore, the wear-resistant coating has the following weight percentages: Ti 7%, Mo 0.5%, Nb 1.5%, Zr 25%, Cr 35%, with the balance being Fe.

[0015] To better achieve the objectives of this invention, this invention also provides a stainless steel material prepared by a stainless steel production process with a textured surface.

[0016] To better achieve the objectives of this invention, the present invention also provides an application of stainless steel material in the preparation of automotive interior speaker grilles.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: The stainless steel sheet of this invention is degreased and cleaned, then its surface is brightened with grinding fluid, and then its surface is wire-drawn using a rolling mill. After that, the stainless steel sheet is immersed in a passivating agent for passivation treatment. The stainless steel sheet is then embossed using an embossing machine to form patterns on its surface. After etching out the mesh shape, it is stamped using a forming mold to obtain the automotive interior speaker grille blank. After preheating and cooling the blank, a wear-resistant coating is formed on the surface of the blank using a vacuum evaporation device.

[0018] The stainless steel parts obtained by this invention have embossed patterns on their surface, giving them an aesthetically pleasing appearance. Even after a wear-resistant coating is applied to the surface, the embossed patterns remain, further enhancing corrosion resistance and wear resistance. In addition, the stainless steel parts are less prone to glare. When used to manufacture speaker grilles for automotive interiors, they can improve the overall design of the vehicle's interior, enhance the quality of the in-car audio system, and reduce the risk of glare from interior lights, resulting in higher safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a flowchart illustrating the production process of the textured stainless steel of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0022] After degreasing and cleaning, the 304 stainless steel 2Nb sheet is brightened using a grinding fluid (4.3% diisooctyl phosphate, 3% monoethanolamine benzoate, 2.3% n-butanol, 28% phosphoric acid, 25% sulfuric acid, and the balance ethanol) at 62℃, 22V, and 30s. The sheet is then cleaned and its surface is brushed using a rolling mill. Embossing is then performed to create patterns on the surface of the stainless steel sheet; honeycomb, willow leaf, and millet grain patterns can be created according to customer requirements. Finally, the stainless steel sheet is immersed in a passivating agent (20.8% quaternary ammonium salt) at 35℃. The stainless steel coil was placed in a solution containing 13% triazole derivatives, 7.3% sodium fluorozirconate, 4% p-dimethylaminobenzaldehyde, 7.1% disodium EDTA, 8.2% 6-aminopurine phosphate, and the balance being water for 3 minutes. The stainless steel coil was then slit and cut using a stainless steel slitting and leveling device to obtain the part blank. A mesh pattern was etched at the designed location on the part blank using an etching process to obtain the automotive interior speaker grille blank. The automotive interior speaker grille blank was preheated at 200℃ for 35 minutes, and then cooled to 120℃. A wear-resistant coating (Ti 7%, Mo 0.5%, Nb 1.5%, Zr 25%, Cr 35%, balance Fe, thickness 40μm) was formed on the surface of the part blank using a vacuum evaporation device. Example

[0023] After degreasing and cleaning, 201 stainless steel 2Nb sheets are brightened using a grinding fluid (8% diisooctyl phosphate, 1.6% monoethanolamine benzoate, 4% n-butanol, 22% phosphoric acid, 35% sulfuric acid, and the remainder ethanol) at 50℃, 31V, and 25s. The sheets are then cleaned and brushed using a rolling mill. Embossing is then applied to create patterns on the surface; honeycomb, willow leaf, and millet grain patterns can be created according to customer requirements. Finally, the sheets are immersed in a passivating agent (16% quaternary ammonium salt, 16% trimethylolpropionate, 16% thiocyanate, 16% methyl methacrylate ... The stainless steel coil was placed in a solution containing 20.5% azole derivatives, 6% sodium fluorozirconate, 5.8% p-dimethylaminobenzaldehyde, 5% disodium EDTA, 10.4% 6-aminopurine phosphate, and the balance being water for 1 minute. The stainless steel coil was then slit and cut using a stainless steel slitting and leveling device to obtain part blanks. Mesh patterns were etched at the designed locations on the part blanks using an etching process to obtain automotive interior speaker grille blanks. The automotive interior speaker grille blanks were preheated at 320℃ for 20 minutes, then cooled to 180℃. A wear-resistant coating (Ti 5.2%, Mo 0.5%, Nb 1.5%, Zr 25%, Cr 15.3%, balance Fe, thickness 65μm) was formed on the surface of the part blanks using a vacuum evaporation device. Example

[0024] After degreasing and cleaning, the 304 stainless steel 2Nb sheet is brightened using a grinding fluid (5.6% diisooctyl phosphate, 1.8% monoethanolamine benzoate, 2.9% n-butanol, 26.3% phosphoric acid, 29.5% sulfuric acid, with the balance being ethanol) at 53℃, 26V, and 29s. The sheet is then cleaned and its surface is brushed using a rolling mill. Embossing is then performed to create patterns on the surface of the stainless steel sheet; honeycomb, willow leaf, and millet grain patterns can be created according to customer requirements. Finally, the stainless steel sheet is immersed in a passivating agent (quaternary ammonium salt 19) at 34℃. The stainless steel coil was placed in a solution containing 14% triazole derivatives, 7.1% sodium fluorozirconate, 5.2% p-dimethylaminobenzaldehyde, 6.3% disodium EDTA, 8.8% 6-aminopurine phosphate, and the balance being water for 2 minutes. The stainless steel coil was then slit and cut using a stainless steel slitting and leveling device to obtain the part blank. A mesh pattern was etched at the designed location on the part blank using an etching process to obtain the automotive interior speaker grille blank. The automotive interior speaker grille blank was preheated at 262℃ for 25 minutes, and then cooled to 160℃. A wear-resistant coating (Ti 8.9%, Mo 0.5%, Nb 1.5%, Zr 25%, Cr 32%, balance being Fe, thickness 50μm) was formed on the surface of the part blank using a vacuum evaporation device.

[0025] Comparative Example 1 Unlike Example 3, the wear-resistant coating consists of Ti 2.9%, Mo 0.6%, Nb 1.8%, Zr 25.4%, Cr 12.6%, with the balance being Fe, and a thickness of 50 μm.

[0026] Comparative Example 2 Unlike Example 3, the automotive interior speaker grille blank was preheated at 300°C for 25 minutes and then cooled to 100°C.

[0027] Test Experiment The parts from Examples 1-3 and Comparative Examples 1-2 were subjected to salt spray tests (GNb / T 10125-2021) and acid resistance (70℃, 0.5mol / L H2SO4 + 2ppm HF) and alkali resistance (60℃, 0.1mol / L NaOH) tests. The results are shown in the table below.

[0028] Salt spray (immersion in 3.5wt% saline solution for 1000 hours) No peeling corrosion was observed. No peeling corrosion was observed. Peeling corrosion occurred <![CDATA[Corrosion current (acid resistance) μA / cm 2 > 0.55 2.58 4.81 <![CDATA[Corrosion current (alkali resistance) μA / cm 2 > 0.47 1.83 0.78 The stainless steel sheet of this invention is degreased and cleaned, then its surface is brightened with grinding fluid, and then its surface is wire-drawn using a rolling mill. After that, the stainless steel sheet is immersed in a passivating agent for passivation treatment. The stainless steel sheet is then embossed using an embossing machine to form patterns on its surface. After etching out the mesh shape, it is stamped using a forming mold to obtain the automotive interior speaker grille blank. After preheating and cooling the blank, a wear-resistant coating is formed on the surface of the blank using a vacuum evaporation device.

[0029] The stainless steel parts obtained by this invention have embossed patterns on their surface, giving them an aesthetically pleasing appearance. Even after a wear-resistant coating is applied to the surface, the embossed patterns remain, further enhancing corrosion resistance and wear resistance. In addition, the stainless steel parts are less prone to glare. When used to manufacture speaker grilles for automotive interiors, they can improve the overall design of the vehicle's interior, enhance the quality of the in-car audio system, and reduce the risk of glare from interior lights, resulting in higher safety.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A process for the production of stainless steel having a surface with a grain, characterized in that, Includes the following steps: I. Selection of Stainless Steel Sheets; 2. After degreasing and cleaning, the stainless steel plate is polished with grinding fluid.

3. After cleaning, stainless steel plates are brushed using a rolling mill.

4. Embossing is performed on stainless steel sheets using an embossing machine to create patterns and designs on the surface of the stainless steel sheets.

5. The stainless steel plate is then immersed in a passivating agent for passivation treatment; 6. Use a stainless steel slitting and leveling blanking device to slitting and blanking the stainless steel coils, and cut the stainless steel coils to obtain part blanks.

8. Prepare a wear-resistant coating with a thickness of 40~65μm on the surface of the part blank, specifically as follows: (1) The wear-resistant coating is composed of Ti, Mo, Nb, Zr, Cr and Fe, wherein the Ti content is not less than 5% and the Cr content is not less than 15%; (2) Preheat the part blank at 200~320℃ for 20~35min, and then cool it to 120~180℃; (3) A wear-resistant coating is generated on the surface of the part blank using a vacuum evaporation equipment.

2. The process for producing a surface-textured stainless steel according to claim 1, characterized in that, Choose 304 or 201 stainless steel sheets.

3. The process for producing a surface-textured stainless steel according to claim 2, wherein The grinding fluid comprises the following raw materials in weight percentages: 4.3-8% diisooctyl phosphate, 1.6-3% monoethanolamine benzoate, 2.3-4% n-butanol, 22-28% phosphoric acid, 25-35% sulfuric acid, and the balance being ethanol.

4. The process for producing a surface-textured stainless steel according to claim 3, characterized in that, The parameters for the brightening process are: temperature 50~62℃, voltage 22~31V, and time 25~30s.

5. The process for producing a surface-textured stainless steel according to claim 4, characterized in that, In step three, the stainless steel plate is immersed in a passivating agent at 35~40℃ and left to stand for 1~3 minutes.

6. The stainless steel production process with textured surface according to claim 5, characterized in that, It also includes step seven, which involves using an etching process to etch a mesh shape at the designed location on the part blank.

7. The process for producing a surface-textured stainless steel according to claim 6, wherein The passivating agent comprises the following raw materials in weight percentages: 16-20.8% quaternary ammonium salt, 13-20.5% triazole derivative, 6-7.3% sodium fluorozirconate, 4-5.8% p-dimethylaminobenzaldehyde, 5-7.1% disodium EDTA, 8.2-10.4% 6-aminopurine phosphate, with the balance being water.

8. The process for producing a surface-textured stainless steel according to claim 7, wherein The wear-resistant coating has the following weight percentages: Ti 7%, Mo 0.5%, Nb 1.5%, Zr 25%, Cr 35%, with the balance being Fe.

9. A stainless steel material prepared by the stainless steel production process with textured surface according to claim 8.

10. The application of the stainless steel material according to claim 9 in the preparation of automotive interior speaker grilles.

Images