Method for processing a metal surface microtexture based on a mask plate biojet

Abstract

The present invention belongs to the technical field of functional surface processing, and specifically discloses a method for processing a metal surface microtexture based on a mask blank biojet, including: (1) microbial culture: increasing the number of microbial communities and microbial activity so that the concentration of highly oxidizing ions in the culture solution reaches a desired setting; (2) mask plate production: designing and producing a mask plate according to the requirements of the microtexture; (3) pre-treating the surface of the workpiece; (4) processing the microtexture; and (5) re-oxidizing the culture solution. The present invention can selectively remove the surface material of the workpiece by combining the mask plate technology and the high-precision servo control system, realize the processing of the texture pattern of the irregular workpiece, and has high applicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional surface processing, and specifically relates to a method for processing a metal surface microtexture based on a mask plate biojet.

Background Art

[0002] Surface texture means that a pattern having geometric shapes and dimensions and regularly arranged is processed on the surface of a material. Surface texture can effectively improve the wear resistance, optical properties, biocompatibility, adhesion and peeling properties, lubrication properties, heat dissipation properties, etc. of the material. Surfaces with microtextures are widely applied to base parts, implants, medical devices, optical components, heat exchange devices, and have prospects for important applications in national strategic industries such as aerospace, energy transportation, and medical rehabilitation.

[0003] Surface texture processing techniques are mainly divided into additive forming, subtractive forming, and forced forming. Additive forming of texture mainly improves the properties of the material surface by regularly adding materials to the material surface by means such as coating, sputtering, spraying, deposition, and casting, and processing micro protrusions on the material surface. Subtractive forming of texture mainly slightly removes the material surface by means such as mechanical cutting, high energy beam processing, chemical etching, electrical discharge machining, and electrochemical machining, and processes fine grooves, dimples, bio patterns, etc. on the material surface to improve the surface performance. Forced forming of texture uses plastic deformation of the material under external restraint to produce large-area microtextures. Conventional surface texture processing techniques have problems such as high equipment costs, high processing costs, difficulty in controlling the form of micronano patterns, and complex processes in the process of processing patterns from several microns to dozens of microns. Therefore, it is quite necessary to develop a new processing method to solve the above problems.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention is to overcome the drawbacks of the prior art and provide a method for processing a metal surface microtexture based on a mask plate biojet.

Means for Solving the Problems

[0005] In order to achieve the above object, one of the technical forms of the present invention is a method for processing a metal surface microtexture based on a mask plate biojet. Specifically, (1) Microbial culture: A step of increasing the number of microbial communities and the activity of microorganisms by performing expansion culture so as to provide a culture environment for the growth and proliferation of microorganisms, and increasing the concentration of oxidizing ions in the culture solution. (2) Mask plate production: A step of designing a mask pattern according to the shape and arrangement of the micro-nano structure to be processed and producing a mask plate. (3) Pretreatment: A step of pretreating the surface of the workpiece. (4) Microtexture processing: According to the specific form of the micro-nano structure to be processed, adjusting the spatial position among the culture solution nozzle, the mask plate, and the workpiece, and adjusting process parameters such as the injection speed and injection angle, which are the key points of the processing of the deformed curved surface and the deformed microtexture. A culture solution having a high oxidizing ion concentration passes through the mask plate and is injected onto the surface of the workpiece, reacts sufficiently, and the exposed surface of the workpiece is eroded and removed by the oxidizing ions, thereby forming a microtexture surface. (5) Re-oxidation of the culture solution: After erosion, the culture solution is converted into a low-oxidizing solution, the low-oxidizing solution is transported to the microbial culture container, and is re-oxidized into a high-oxidizing solution by microorganisms.

[0006] In the culture of microorganisms, a culture environment is constructed according to environmental factors such as oxygen, pH, nutrients, and temperature for the growth or metabolism of microorganisms, a raw material to be converted is provided, the number of microbial communities is increased by performing expansion culture, and the activity of microorganisms and the concentration of high-oxidizing ions in the solution are increased.

[0007] Furthermore, the microorganism used in the step (1) has an erosion effect on metals. The microorganism directly produces ions or is involved in ion conversion, including but not limited to Thiobacillus ferrooxidans and Thiobacillus thiooxidans.

[0008] Furthermore, during the culturing process in the step (1), by monitoring the relevant parameters characterizing the microorganism conversion efficiency, such as the number of microorganisms and the concentration of products, the microorganisms are made highly active. When the activity of the microorganisms is low, means can be adopted to gradually increase the microorganism activity according to different culture solution volume levels.

[0009] In the processing process of the microtexture, material removal is carried out by the oxidative solution coming into sufficient contact with the metal to react. Since the low-oxidation solution generated by the material removal needs to be oxidized to a high-oxidation solution by the action of microorganisms, in the experiment, it is necessary to ensure that the microorganisms have high activity. Usually, the bacterial strain is stored at low temperature in a refrigerator. The bacterial strain has low activity under low-temperature conditions, and it is necessary to increase the microorganism activity by stepwise culturing. The microorganism activity is determined by the conversion efficiency per unit time. In this method, by using a color reaction to measure the amount of products and reactants per unit volume after the action of microorganisms, the microorganism activity is characterized.

[0010] Furthermore, the culture solution in the step (1) is rich in highly oxidative ions. The culture solution involved in the microtexture processing may be a high-oxidation solution containing microorganisms or a high-oxidation solution not containing microorganisms.

[0011] The mask plate has a penetrating texture pattern, and a highly oxidative solution with a certain kinetic energy passes through the mask blank and comes into sufficient contact with the material on the surface of the workpiece to react.

[0012] Furthermore, the shape of the microtexture pattern in the step (2) is circular, square, rectangular, or other desired shapes.

[0013] Furthermore, the dimensions of the microtexture pattern in step (2) are designed on a millimeter scale, a micrometer scale, or a nanometer scale according to requirements.

[0014] Furthermore, the mask plates used in steps (2) and (4) are made of materials that are not eroded by highly oxidizing solutions, and plastics, rubbers, ceramics, corrosion-resistant metals, etc. are preferred.

[0015] Furthermore, the mask plate in step (2) can obtain a desired shape by various current suitable processing methods, including but not limited to lasers, etching, high-energy beams, water jets, machining, etc.

[0016] Furthermore, the main components of the workpiece in steps (3) and (4) are erodible by highly oxidizing solutions, including but not limited to pure metal materials, metal alloy materials, metal sintered materials, etc. with lower oxidizability than trivalent iron ions such as iron, cobalt, copper, tin, etc.

[0017] Furthermore, the pretreatment of the surface of the workpiece in step (3) includes, but is not limited to, rust removal, degreasing, polishing, various cleaning, etc. for the purpose of removing surface residues and obtaining a clean and dry surface.

[0018] According to the processing requirements and the constraints of the processing environment, by appropriately adjusting the relative positions of the nozzle, the mask plate, and the workpiece and the process parameters, it is ensured that the flow field of the highly oxidizing solution passing through the mask plate is below the processing dimensions of the workpiece surface microtexture, and material removal in the exposed area is realized.

[0019] Furthermore, in the step (4), after the culture solution contacts the material surface through the mask plate, a substitution reaction occurs between the highly oxidizing ions in the culture solution and the metal element or metal oxide on the surface to be processed. The metal element or oxide on the surface is oxidized into metal ions and dissolved in the solution, realizing the removal of the metal material. Also, the highly oxidizing culture solution involved in the removal of the material is converted into a low-oxidizing culture solution.

[0020] Furthermore, the cross-section of the nozzle outlet in the step (4) is one of a circle, a square, and a rectangle, or is another specific shape designed according to the requirements of the workpiece surface microtexture.

[0021] Furthermore, in the step (4), by adjusting the outlet speed of the nozzle, the collision speed at which the highly oxidizing solution passes through the mask blank and reaches the workpiece is controlled, realizing the adjustment of the processing efficiency and processing accuracy of the microtexture on the workpiece surface.

[0022] Furthermore, in the step (4), by adjusting the injection angle, the collision pressure at which the highly oxidizing solution collides with the workpiece surface can be adjusted. Due to the pressure difference of the solution, different micro-nano scale texture surfaces can be obtained.

[0023] Furthermore, in the step (4), by controlling the relative position between the nozzle and the workpiece, microtexture processing for the entire surface or a part of the workpiece is realized. The low-oxidation solution is transported to the microbial culture container through the pipeline, and the oxidation process from the low-oxidation solution to the high-oxidation solution is accelerated by utilizing the microbial characteristics. After the solution is restored to a high oxidation degree, it continues to participate in the processing of the microtexture, realizing the continuous cycle of the entire processing process.

Advantages of the Invention

[0024] The advantages of the present invention compared with the prior art are as follows. 1. The present invention utilizes the metabolic characteristics of microorganisms to ensure the high oxygenation property of the culture solution, introduces jet technology to improve the removal efficiency of the surface material of the workpiece, and this method has the characteristics of being environmentally friendly and having low power consumption. 2. In the process of processing microtextures on the material surface, the present invention adopts a low-energy removal means to reduce the damage to the texture surface, improve the mechanical performance of the surface texture, and bring great benefits to the improvement of component performance and the extension of service life. 3. The present invention can realize the processing of the micro-nano structure of the deformed workpiece by selectively removing the surface material of the workpiece by combining the mask plate technology and the high-precision servo control system, and has high applicability.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0026] To make the object, technical mode, and advantages of the present invention clearer, the present invention will be described in more detail below with reference to the attached drawings and specific examples, but the protection scope of the present invention is not limited to these examples. The same reference signs in this specification represent the same elements throughout, and similar reference signs represent similar elements.

[0027] In the description of the present invention, the positions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "bottom", "inside", "outside", etc. should be understood to be based on the positions or positional relationships shown in the perspective view of the drawings. This is merely for the convenience of explaining the present invention and simplifying the description, and does not explicitly or implicitly imply that the device or element mentioned must have a specific position, be configured and operated at a specific position. Therefore, it should not be understood as limiting the present invention.

[0028] <Example 1> The processing method of the metal surface microtexture based on the mask plate biojet includes the following steps.

[0029] 1. Microbial culture The microorganism used in the example is Thiobacillus ferrooxidans. Since the activity of the cryopreserved bacterial strain is low, if it is directly involved in the texture processing, the processing efficiency will decrease. When conducting experiments, in order to ensure high activity when the microorganism is involved in the reaction, the microbial activity is increased step by step at different culture solution volume levels (set to 100 ml, 500 ml, 2000 ml, and 10000 ml respectively). The components of the medium solution include 3 g / L of ammonium sulfate, 0.5 g / L of magnesium sulfate heptahydrate, 0.1 g / L of dipotassium hydrogen phosphate, 0.01 g / L of potassium nitrate tetrahydrate, and 24.83 g / L of ferrous sulfate heptahydrate. The pH of the medium is adjusted to 1.8 with dilute sulfuric acid. Inoculate the Thiobacillus ferrooxidans bacterial strain into the culture solution, inject oxygen gas, and culture at a temperature of 30 °C for 20 hours, and the shaking rotation speed is 180 rpm. Utilize the microbial action to convert Fe 2+ to Fe 3+ , measure the relative contents of Fe 2+ and Fe 3+ in the medium to judge the microbial activity, and the Fe 3+ -rich solution after the oxidation is completed participates in the processing of the surface microtexture as a highly oxidizing solution. Due to the microbial action, the content of Fe 2+ in the solution is almost zero, and most of the iron ions are Fe 3+exists in the form of Fe 2+ and Fe 3+ Based on the color development characteristics in different solutions of Fe and Fe, it is judged whether it has been completely converted by titration method.

[0030] 2. Mask treatment As shown in FIGS. 1-2, the fine pattern of the mask 6 is an empirically designed matrix hole. Circular holes with a diameter of 50 μm are processed in a 9×9 matrix on a 301 stainless steel thin plate using a micronano laser cutting technique, and are adhered to the copper sample 8 by mechanical chuck means.

[0031] 3. Pretreatment of the workpiece Taking copper as the workpiece, a sample with a diameter φ = 15 mm and a thickness h = 3 mm is taken from a copper plate, inserted into resin, and the sample is lapped, polished, etc. using a polishing machine. After passing through the cleaning and drying processes, a flat and clean copper block sample 8 is obtained.

[0032] 4. Microtexture processing As shown in FIGS. 1-2, in this embodiment, the pressure of the culture solution is increased using the pressurizing device 3 as the injection power source, and the highly oxidizing culture solution in the culture tank 2 is transported to the nozzle 5 through the jet pipeline 4, and the highly oxidizing culture solution ejected from the outlet of the nozzle 5 passes through the mask plate 6 and reacts with the exposed surface of the copper sample 8. By adjusting the posture of the chuck stage 11, microtexture processing of the entire surface of the workpiece can be realized, and removal of the surface material of the copper block can be realized. The culture solution involved in the reaction is converted into a low-oxidizing solution and returns to the liquid storage tank 7. In this microtexture processing by bioget, the cross-section of the nozzle outlet is a circle with a diameter of 12 mm, the distance d between the nozzle outlet and the mask plate is 5 mm, the flow rate is 0.14 L / s, the axis of the nozzle is perpendicular to the plane of the mask plate, that is, α = 90°, θ = 90°. After etching for 5 minutes, microtexture is processed on the surface of the copper sample 8.

[0033] 5. Re-oxidation of the culture solution by microbial metabolic characteristics As shown in Fig. 1, the low-oxidation solution in the liquid storage tank 7 returns to the microbial reaction vessel 1 via the reflux pipeline 9 and the pump 10, and is re-oxidized from the low-oxidation solution to the high-oxidation solution according to the microbial characteristics and stored in the culture tank 2, realizing the recycling of the culture solution.

[0034] <Example 2> 1. Microbial culture The microorganism used in the example is Thiobacillus ferrooxidans. Since the activity of the low-temperature-preserved bacterial strain is low, if it is directly involved in the texture processing, the processing efficiency will decrease. When conducting experiments, in order to ensure high activity when the microorganism is involved in the reaction, the microbial activity is increased step by step at different culture solution volume levels (set to 100 ml, 500 ml, 2000 ml, and 10000 ml respectively). The components of the medium solution include 3 g / L of ammonium sulfate, 0.5 g / L of magnesium sulfate heptahydrate, 0.1 g / L of dipotassium hydrogen phosphate, 0.01 g / L of potassium nitrate tetrahydrate, and 24.83 g / L of ferrous sulfate heptahydrate. The pH of the medium is adjusted to 1.8 with dilute sulfuric acid. Inoculate the Thiobacillus ferrooxidans bacterial strain into the culture solution, inject oxygen gas, and culture at a temperature of 30 °C for 20 hours, with the shaking rotation speed being 180 rpm. Utilize the microbial action to convert Fe 2+ to Fe 3+ , measure the relative contents of Fe 2+ and Fe 3+ in the medium to judge the microbial activity, and the Fe 3+ -rich solution after the oxidation is completed participates in the processing of the surface microtexture as a high-oxidation solution. Due to the microbial action, the content of Fe 2+ in the solution becomes almost 0, and most of the iron ions exist in the form of Fe 3+ . Based on the color development characteristics of different solutions of Fe 2+ and Fe 3+ , judge whether it is completely converted by titration.

[0035] 2. Mask treatment As shown in Fig. 1-2, the fine pattern of the mask 6 is an empirically designed matrix hole. Circular holes with a diameter of 50 μm are machined in a 301 stainless steel thin plate in a 9×9 matrix using a micronano laser cutting technique, and are adhered to the copper sample 8 by mechanical chucking means.

[0036] 3. Pretreatment of the workpiece Taking copper as the workpiece, a sample with a diameter φ = 15 mm and a thickness h = 3 mm is taken from a copper plate and inserted into a resin. The sample is lapped, polished, etc. using a polishing machine, and through the cleaning and drying processes, a flat and clean copper block sample 8 is obtained.

[0037] 4. Microtexture processing As shown in Figs. 1-2, in this embodiment, the pressure of the culture solution is increased using the pressurizing device 3 as an injection power source. The highly oxidizing culture solution in the culture tank 2 is transported to the nozzle 5 through the jet pipeline 4, and the highly oxidizing culture solution ejected from the outlet of the nozzle 5 passes through the mask plate 6 and reacts with the exposed surface of the copper sample 8. By adjusting the posture of the chuck stage 11, microtexture processing of the entire workpiece surface can be realized, and removal of the surface material of the copper block can be achieved. The culture solution involved in the reaction is converted into a low-oxidizing solution and returns to the liquid storage tank 7. In this microtexture processing by the biojet, the cross-section of the nozzle outlet is a circle with a diameter of 12 mm, the distance d between the nozzle outlet and the mask plate is 5 mm, the flow rate is 0.17 L / s, the axis of the nozzle is perpendicular to the plane of the mask plate, that is, α = 90°, θ = 90°. After etching for 5 minutes, microtextures are processed on the surface of the copper sample 8.

[0038] 5. Re-oxidation of the culture solution by microbial metabolic characteristics As shown in Fig. 1, the low-oxidizing solution in the liquid storage tank 7 returns to the microbial reaction vessel 1 through the reflux pipeline 9 and the pump 10, and is re-oxidized from the low-oxidizing solution to a high-oxidizing solution by microbial characteristics and stored in the culture tank 2, realizing the recycling of the culture solution.

[0039] <Example 3> 1. Microbial culture The microorganism used in the example is Thiobacillus ferrooxidans. Since the activity of the cryopreserved bacterial strain is low, if it is directly involved in the texture processing, the processing efficiency will decrease. When conducting experiments, in order to ensure high activity when the microorganism is involved in the reaction, the microorganism activity is increased step by step at different culture solution volume levels (set to 100 ml, 500 ml, 2000 ml, and 10000 ml respectively). The components of the medium solution include 3 g / L of ammonium sulfate, 0.5 g / L of magnesium sulfate heptahydrate, 0.1 g / L of dipotassium hydrogen phosphate, 0.01 g / L of potassium nitrate tetrahydrate, and 24.83 g / L of ferrous sulfate heptahydrate. The pH of the medium is adjusted to 1.8 with dilute sulfuric acid. Inoculate the Thiobacillus ferrooxidans bacterial strain into the culture solution, inject oxygen gas, and culture at a temperature of 30 °C for 20 hours, with the shaking rotation speed set to 180 rpm. Utilize the microorganism action to convert Fe 2+ to Fe 3+ , measure the relative contents of Fe 2+ and Fe 3+ in the medium to judge the microorganism activity. The Fe 3+ -rich solution after the oxidation is completed participates in the processing of the surface microtexture as a highly oxidizing solution. Due to the microorganism action, the content of Fe 2+ in the solution becomes almost 0, and most of the iron ions exist in the form of Fe 3+ . Based on the color development characteristics of different solutions of Fe 2+ and Fe 3+ , determine whether it has been completely converted by titration.

[0040] 2. Mask treatment As shown in Figure 1-2, the fine pattern of the mask 6 is an empirically designed matrix hole. Use the micronano laser cutting technology to process circular holes with a diameter of 100 μm in a 9×9 matrix on a 301 stainless steel thin plate, and adhere it to the copper sample 8 by mechanical chuck means.

[0041] 3. Pretreatment of the parts to be processed Using copper as the workpiece, a sample with a diameter φ = 15 mm and a thickness h = 3 mm is taken from a copper plate, inserted into resin, and the sample is lapped, polished, etc. using a polishing machine. After going through the cleaning and drying processes, a flat and clean copper block sample 8 is obtained.

[0042] 4. Microtexture processing As shown in FIGS. 1 to 2, in this embodiment, the pressurizing device 3 is used as an injection power source to increase the pressure of the culture solution. The highly oxidizing culture solution in the culture tank 2 is transported to the nozzle 5 through the jet pipeline 4, and the highly oxidizing culture solution ejected from the outlet of the nozzle 5 passes through the mask plate 6 and reacts with the exposed surface of the copper sample 8. By adjusting the posture of the chuck stage 11, microtexture processing of the entire surface of the workpiece can be realized, and removal of the surface material of the copper block can be realized. The culture solution involved in the reaction is converted into a low-oxidizing solution and returns to the liquid storage tank 7. In this microtexture processing by biojet, the cross-section of the nozzle outlet is a circle with a diameter of 12 mm, the distance d between the nozzle outlet and the mask plate is 5 mm, the flow rate is 0.14 L / s, the axis of the nozzle is perpendicular to the plane of the mask plate, that is, α = 90° and θ = 90°. After etching for 5 minutes, microtextures are processed on the surface of the copper sample 8.

[0043] 5. Re-oxidation of the culture solution by microbial metabolic characteristics As shown in FIG. 1, the low-oxidizing solution in the liquid storage tank 7 returns to the microbial reaction vessel 1 through the reflux pipeline 9 and the pump 10, and is re-oxidized from the low-oxidizing solution to a highly oxidizing solution by microbial characteristics and stored in the culture tank 2, realizing the recycling of the culture solution.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can change the technical forms described in the above embodiments or equivalently substitute some of the technical features. It is obvious that any modification, equivalent substitution, improvement, etc. within the idea and principle of the present invention are included in the protection scope of the present invention.

Industrial applicability

[0045] The present invention belongs to the technical field of mechanical surface processing. Specifically, it discloses a method for processing a metal surface microtexture based on a mask plate biojet, including: (1) Microbial culture: increasing the number of microbial communities and microbial activity so that the concentration of highly oxidizing ions in the culture solution reaches a desired setting; (2) Mask plate production: designing and manufacturing a mask plate according to the requirements of the microtexture; (3) Pretreating the surface of the workpiece; (4) Processing the microtexture; and (5) Re-oxidizing the culture solution. The present invention combines mask plate technology and a high-precision servo control system to selectively remove the surface material of the workpiece, realizing the processing of the texture pattern of a deformed workpiece, with high applicability and industrial availability.

Explanation of Signs

[0046] 1 Microbial reaction vessel 2 Culture tank 3 Pressurizing device 4 Jet pipeline 5 Nozzle 6 Mask plate 7 Liquid storage tank 8 Copper sample 9 Return pipeline 10 Pump 11 Chuck stage

Claims

1. (1) Microbial cultivation: A culture medium containing oxidizing ions and / or oxidized ions provides a culture environment for the growth and proliferation of microorganisms, and the number of microbial communities and the activity of the microorganisms are increased by expanding the culture medium, thereby increasing the concentration of oxidizing ions in the culture medium; (2) mask plate preparation: designing a mask pattern according to the shape and arrangement of the micro-nano structure to be processed, and preparing a mask plate; (3) Pretreatment: Pretreatment of the workpiece surface; (4) Micro-texture processing: according to the specific form of the micro-nano structure to be processed, adjust the spatial positions among the culture solution nozzle, the mask plate and the workpiece, and adjust the spraying speed and spraying angle so that the culture solution is sprayed onto the workpiece surface through the mask plate, and the workpiece surface is eroded and removed to form a micro-textured surface; (5) Reoxidation of the culture solution by microorganisms: A method for processing a metal surface microtexture based on a mask plate biojet, comprising the steps of: transporting the culture solution after the erosion in step (4) to step (1) microbial culture, and reoxidizing it into a highly oxidizing solution by the microorganisms.

2. The method for processing a metal surface microtexture according to claim 1, characterized in that the microorganisms used in step (1) have a corrosive effect on metals, directly produce ions, or are involved in ion conversion, and the microorganisms include Thiobacillus ferrooxidans and Thiobacillus thiooxidans.

3. The method for processing a metal surface microtexture according to claim 1, characterized in that in step (1), the number of microorganisms or the concentration of their products are monitored to increase the activity of the microorganisms involved in the texturing process.

4. The oxidizing ion in step (1) is Fe ３＋ and the oxidizable ion is Fe ２＋ 2. The method for forming a microtexture on a metal surface according to claim 1,

5. The method for processing a metal surface microtexture according to claim 1, characterized in that the pattern shape of the microtexture in step (2) is one of a circle, a square, a rectangle or any other desired shape, and the pattern dimension of the microtexture is designed to be on the millimeter scale, micrometer scale or nanoscale as desired.

6. 2. The method for processing a metal surface microtexture according to claim 1, wherein the mask plate in steps (2) and (4) is made of a material that is not attacked by an oxidizing solution and has a mask pattern penetrating therethrough.

7. 2. The method for processing a metal surface micro-texture according to claim 1, wherein the processing method of the mask plate in step (2) includes laser, etching, high-energy beam, water jet, and mechanical processing.

8. The method for processing a metal surface microtexture according to claim 1, characterized in that the main components of the workpiece in steps (3) and (4) are erodible in an oxidizing solution, and the workpiece includes pure metal materials, metal alloy materials, and metal sintered materials that are less oxidizable than iron, cobalt, copper, tin, and trivalent iron ions.

9. 2. The method for processing a micro-texture on a metal surface according to claim 1, wherein the pretreatment of the workpiece surface in step (3) includes removing rust, degreasing, polishing, and various cleaning processes.

10. The method for processing metal surface microtexture as described in claim 1, characterized in that the cross section of the nozzle outlet in step (4) is either circular, square, rectangular, or other special shape designed according to the requirements of the microtexture of the workpiece surface.

11. The method for processing a metal surface micro-texture as described in claim 1, characterized in that in step (4), the nozzle outlet speed is adjusted to control the collision speed at which the oxidizing solution passes through the mask plate and reaches the workpiece, the spray angle is adjusted to adjust the pressure at which the oxidizing solution collides with the workpiece surface, and the relative position between the nozzle and the workpiece is controlled to realize micro-texture processing on the entire surface or part of the workpiece.

Images