WO2018129872A1

WO2018129872A1 - Stainless steel and plastic combined member, and processing method therefor

Info

Publication number: WO2018129872A1
Application number: PCT/CN2017/090624
Authority: WO
Inventors: 张法亮; 董晓佳; 王成; 张孟军; 刘鸿章; 唐红平; 刘利强
Original assignee: 歌尔股份有限公司
Priority date: 2017-01-16
Filing date: 2017-06-28
Publication date: 2018-07-19
Also published as: CN106917061B; CN106917061A

Abstract

A stainless steel and plastic combined member, and a processing method therefor. The stainless steel and plastic combined member comprises a stainless steel substrate (1). Honeycomb pores (11) are formed on the surface of the stainless steel substrate (1). An oxide film is formed on the surfaces of the honeycomb pores (11) by means of a 120-10 minute-high temperature oxidation treatment at a temperature of 110-450ºC. The oxide film at least comprises two of an iron oxide, a chromic oxide, and a nickel oxide. A plastic material (2) is formed on the stainless steel substrate (1) by means of injection molding. The plastic material (2) is embedded into the honeycomb pores (11). The oxide film implements a good heat insulation effects and improves the combining force between the stainless steel substrate (1) and the plastic material (2).

Description

Combination of stainless steel and plastic and processing method thereof

Technical field

The invention relates to the technical field of material processing, in particular to a joint of stainless steel and plastic and a processing method thereof.

Background technique

With the gradual development of materials technology, more and more products use metal and plastic composite forms to form the product structure. This structural design can achieve rich functional effects. For example, in the case where the appearance of the product is required to exhibit metal features and the internal structure needs to be reduced in weight and material cost, a metal-plastic composite design can be used.

Traditional combinations of metal and plastic include adhesive bonding, snap-fit or rivet attachment. However, the conventional composite method has defects such as low composite reliability and a need to increase the fixed connection mechanism. With the development of technology, a composite method of injection molding plastic on a metal surface has appeared in the prior art. In the plastic injection molding process, the plastic is directly injection molded on the metal material using the metal material as a substrate. However, the bonding force between metal and plastic is limited, there is a risk of falling off between the two, and the composite reliability is difficult to improve.

Therefore, it is necessary to improve the composite process of metal and plastic materials, improve the structural reliability of the material composite, or simplify the structure of the finished product, and reduce the addition of additional components to the product.

Summary of the invention

It is an object of the present invention to provide a new technical solution for the composite of stainless steel and plastic.

According to a first aspect of the present invention, there is provided a joint of stainless steel and plastic, the joint comprising a stainless steel substrate having a honeycomb-shaped pore formed on a surface thereof, after 110-450 degrees Celsius, 120 -10 minutes of high temperature oxidation treatment, the honeycomb pores of the table An oxide film is formed on the surface, the oxide film comprising at least two of iron oxide, chromium oxide or nickel oxide, and the stainless steel substrate is injection-molded with a plastic material, and the plastic material is embedded in the honeycomb In the pores.

Optionally, the oxide film comprises at least iron oxide and chromium oxide.

Optionally, the high temperature oxidation treatment has a temperature in the range of 200-300 degrees Celsius and a treatment time of 90-30 minutes.

Alternatively, the plastic material is made of at least one of a polyphenylene sulfide resin, a polybutylene terephthalate resin, a polyamide, a polycarbonate, and a polyolefin.

Optionally, the honeycomb pores have an average pore diameter ranging from 10 to 150 nm, and the honeycomb pores extend from the surface of the stainless steel substrate to the inside with an average depth ranging from 10 to 200 nm.

Optionally, the oxide film has a thickness ranging from 1 to 20 nm. Further optionally, the oxide film has a thickness ranging from 10 to 20 nm.

Optionally, a surface of the oxide film is adsorbed by a layer of a pore-forming agent, wherein the pore-treating agent is terephthalic acid, ethylenediaminetetraacetic acid, p-nitrobenzenesulfonic acid, water-soluble amino acid, ethylenediamine, and three At least one of ethanolamine, ammonia, ethyl chloride, and epichlorohydrin.

Optionally, the plastic material is doped with a filler material, and the filler material is at least one of nylon fiber, carbon fiber, glass fiber, aramid fiber, calcium carbonate, magnesium carbonate, silicon dioxide, and clay. The percentage of the filler material in the plastic material ranges from 5 to 40% by weight.

The invention also provides a method for processing a combination of stainless steel and plastic, comprising: providing a stainless steel substrate; etching the stainless steel substrate to form a honeycomb pore on the surface of the stainless steel substrate; Performing a high temperature oxidation treatment to form an oxide film on the surface of the stainless steel substrate, the oxide film including at least two of iron oxide, chromium oxide or nickel oxide, and the temperature range of the high temperature oxidation treatment is 110- 450 degrees Celsius, processing time is 120-10 minutes; plastic material is injection molded on the surface of the stainless steel substrate, and a part of the structure of the plastic material is embedded in the honeycomb pores to form an integrated combination of stainless steel and plastic.

Optionally, the oxide film comprises at least iron oxide and chromium oxide.

Optionally, the temperature range of the high temperature oxidation treatment is 200-300 ° C, and the processing time is 90-30 minutes.

Optionally, the volume content of oxygen in the high temperature oxidation treatment atmosphere is ≥99%.

Optionally, after the high temperature oxidation treatment, the honeycomb pores are subjected to a boring treatment, and the stainless steel substrate is introduced into the pore former, the porphyrin is terephthalic acid, ethylenediaminetetraacetic acid, p-nitro At least one of benzenesulfonic acid, water-soluble amino acid, ethylenediamine, triethanolamine, aqueous ammonia, ethyl chloride, and epichlorohydrin.

Optionally, the etching process is chemical etching, and the stainless steel substrate is immersed in a chemical etching solution of 30-90 degrees Celsius for 10-120 minutes, and the chemical etching solution is sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, boric acid, formic acid. At least one of propionic acid, butyric acid, alginic acid, oxalic acid, citric acid, and caprolactam.

Optionally, the etching process is electrochemical etching, and the stainless steel substrate is used as an anode, and the region where the honeycomb pores are to be formed is electrochemically etched, and the electrochemical etching voltage ranges from 5 to 60 V, and the duration is 10-100 minutes.

The inventors of the present invention have found that in the prior art, although there are technical solutions for injection-molding some metal materials with plastic materials, there is no improvement in the prior art for the composite manner of stainless steel and plastic materials. A technical solution with high reliability. Therefore, the technical task to be achieved by the present invention or the technical problem to be solved is not thought of or expected by those skilled in the art, so the present invention is a new technical solution.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The accompanying drawings, which are incorporated in FIG

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a joint of stainless steel and plastic provided by the present invention.

2 is a schematic view showing the topographical features of the honeycomb pores provided in an embodiment of the present invention.

3 is a schematic view showing the surface structure of a stainless steel substrate provided by the present invention.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but the techniques, methods and apparatus should be considered as part of the specification, where appropriate.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

The present invention provides a combination of stainless steel and plastic that includes a stainless steel substrate and an injection molded plastic. As shown in FIG. 1, a honeycomb-like pore 11 is formed on the surface of the stainless steel substrate 1, and the honeycomb-shaped pores 11 have a nano-scale pore structure. Alternatively, the honeycomb pores 11 may be formed only in a region on the stainless steel substrate 1 where the plastic material 2 needs to be injection molded. Alternatively, the honeycomb pores 11 may be formed on the entire surface of the stainless steel substrate 1. Specifically, an oxide film is formed on the surface of the honeycomb pores 11, and the oxide film is formed by high temperature oxidation treatment. The stainless steel substrate 1 may be placed in a heat treatment apparatus and heat-treated at a temperature of 110-450 degrees Celsius for 120-10 minutes, and specifically, may be heat-treated for 120-90 minutes in a temperature range of 110-200 degrees Celsius. The heat treatment is carried out for 90 to 30 minutes in a temperature range of 200 to 300 ° C, and heat treatment is carried out for 30 to 10 minutes in a temperature range of 300 to 450 ° C to form an oxide film on at least the surface of the honeycomb pores 11. The above specific temperature and time settings are only exemplary, and it is usually necessary to obtain an ideal oxide film, temperature and time. Generally, there is an inverse trend, but this is not inevitable. According to the specific situation, if the quality requirement of the oxide film is lowered, the temperature and time may not need to be set under this trend, for example, at 110 degrees Celsius. , only heat for 10-30 minutes. The oxide film mainly includes at least two of iron oxides, chromium oxides, or nickel oxides, and may include, for example, iron oxides and chromium oxides, or may include iron oxides, chromium oxides, nickel oxides, and the like. The thickness and composition of the oxide film can be adjusted by adjusting the temperature and time of the heat treatment, and the above specific temperature and time are preferred embodiments of the present invention to achieve the technical effect. A plastic material 2 is injection-molded on the surface of the stainless steel substrate 1, and the plastic material 2 is injection molded on a region of the stainless steel substrate 1 having the honeycomb pores 11. On the contact surface of the plastic material 2 with the stainless steel substrate 1, a plastic material 2 is embedded in the honeycomb pores 11.

The joint of stainless steel and plastic provided by the invention has the following technical effects. First, the volume of the oxide film formed by the high temperature oxidation treatment is expanded, and the surface forms a fine uneven surface, which increases the surface roughness of the honeycomb pores in the honeycomb shape. The combination of the stainless steel substrate and the plastic material is further improved on the basis of the fine holes.

Second, the oxide film formed by the high temperature oxidation treatment is formed by in-situ oxidative growth from the surface of the stainless steel substrate. The oxide film is dense and thick, and the oxide film has a stronger bonding force with the stainless steel substrate. Therefore, the stainless steel substrate and the plastic material are not easily separated and damaged during the drawing or shearing process. In particular, the oxide film grown by in-situ oxidation has a distinct and stronger bonding force with respect to the oxide layer formed by impregnation and drying using an acid solution or a salt solution containing metal ions. This oxide film is more physically and chemically bonded to the stainless steel substrate. Moreover, the oxide film of the present invention has a denser structure and stronger corrosion resistance than the above-mentioned conventional oxide film. This structural feature ensures the reliability of plastic material injection on the oxide film, and prevents corrosion cracking, mechanical fracture, and the like. .

When the injection molding process is performed, the oxide film can reduce the heat loss of the plastic material and reduce the heat of the plastic material from being lost from one side of the stainless steel substrate. This effect delays the time for solidification and crystallization of the plastic material, so that the plastic material can be more fully filled in the honeycomb pores, and the bottom of the honeycomb pores can also be well filled. In this way, the stainless steel substrate and the plastic material can exhibit better airtightness and the connection reliability is higher. In particular, the thermal conductivity of ferric oxide The rate is low, and the thermal conductivity of ferrous oxide is relatively high. Among them, the thermal conductivity of stainless steel is 16.3 W/m·K at 400 ° C, and the thermal conductivity of ferric oxide is 5.1 W/m·K. The thermal conductivity of ferrous oxide is 15.0 W/m·K. For iron oxides, the oxidation by high temperature oxidation treatment is more sufficient. After high temperature oxidation treatment, the content of ferric oxide is greatly increased, and the content of ferrous oxide is greatly reduced. In addition, since chromium is active in iron, high-temperature oxidation accelerates the metal reaction rate, and the chromium oxide film is denser. At 400 ° C, the thermal conductivity of chromium oxide is about 10 W/m·K. The above is one of the reasons why the oxide film of the present invention has a good heat insulating effect.

The conventional oxide film of the steel material is mainly a natural oxide film of iron, or a manganese oxide, a zinc phosphorus oxide, etc., and the oxide film has a large thermal conductivity and cannot function as a heat insulator. Among them, for stainless steel materials, the stainless steel material after chemical etching is preferentially corroded by the active element of chromium, so the natural oxide film of stainless steel also includes a loose, extremely thin chromium oxide. This oxide layer is susceptible to damage from external environments and mechanical contact. If a plastic material is directly injected onto the oxide layer, other metal atoms such as metal iron are continuously precipitated to form a loose oxide film. This oxide film not only does not function as a heat insulator, but also does not have an anti-corrosion effect, which affects the bonding reliability of the plastic material.

In one embodiment of the present invention, by adjusting the conditions of the high temperature oxidation treatment and combining the energy spectrum analysis, the Fe, Cr, Ni, and O elements are mainly present in the oxide film, wherein the Ni element content is low. Therefore, the oxide film mainly has a small thermal conductivity of iron oxide and chromium oxide, and exhibits superior heat insulation effect.

On the other hand, since the bonding member provided by the present invention has the above-described technical effects, in the present invention, the pore diameter of the honeycomb pores can be appropriately reduced, and the bonding force between the stainless steel substrate and the plastic material can be ensured. By reducing the pore size of the honeycomb pores, the corresponding pore forming process is also simplified, thereby resulting in simplification of the process flow and reduction in time cost. After the pore size of the honeycomb pores is lowered, the pores are more evenly distributed and the pore quality is higher. Fig. 2 shows the morphology of the honeycomb pores on the surface of the stainless steel substrate after high-temperature oxidation treatment, and the honeycomb pores are uniformly distributed.

In particular, in a preferred embodiment of the present invention, the high temperature oxidation treatment for forming an oxide film can be carried out in an atmosphere having an oxygen volume content of 75% to 100%, preferably a volume content of oxygen ≥ 99%, at a high oxygen pressure. In the atmosphere, the iron element is further oxidized sufficiently to form trioxane. The iron is further oxidized to further accelerate the oxidation of chromium or nickel to form a dense oxide film. The material and thickness of the oxide film can be controlled by adjusting the oxygen content in the atmosphere of the high temperature oxidation treatment. The above parameters can be adjusted according to the performance requirements of the bonding member, which is not limited by the present invention.

In addition, the oxide film of the present invention is formed by high-temperature oxidation treatment, which can improve the adsorption and filling effect of the plastic material during injection molding, and make the plastic material more fully and reliably adsorbed into the honeycomb pores. The main reason is that the high temperature oxidation process, the oxide interface which has been generated with the oxygen atom of molecular oxygen reduction reaction occurs, forming a large amount of O ₂ ^- active ion. The formation and aggregation of such active ions on the surface of the oxide film is more conducive to the subsequent adsorption of humectants and plastics. This technical effect does not exist on the natural oxide film or the oxide film formed by acid-base oxidation in the prior art, and is a technical effect unmatched by the conventional oxide film.

In particular, the surface of the oxide film may be adsorbed with a pore former. The pore-penetrating agent can improve the surface characteristics of the oxide film, so that the plastic material can smoothly flow into the honeycomb pores during the injection molding process. The treatment method of the oxide film of the present invention can improve the adsorption of the pore-forming agent on the oxide film. Optionally, the pore-treating agent is terephthalic acid, ethylenediaminetetraacetic acid, p-nitrobenzenesulfonic acid, water-soluble amino acid, ethylenediamine, triethanolamine, ammonia, ethyl chloride, epichlorohydrin. At least one of them.

Optionally, the oxide film may have a thickness ranging from 1 to 20 nm, and the thickness of the oxide film may be adjusted by adjusting conditions such as temperature, time, and atmosphere of the high temperature oxidation treatment.

Alternatively, the plastic material may be made of at least one of a polyphenylene sulfide resin, a polybutylene terephthalate resin, a polyamide, a polycarbonate, and a polyolefin. These materials can be combined to form a high-hardness crystalline resin composition in which the composition can be crystallized and solidified in the honeycomb pores after cooling.

Alternatively, the honeycomb pores may have an average pore diameter ranging from 10 to 150 nm, and the honeycomb pores may extend from the surface of the stainless steel substrate to an inner depth ranging from 10 to 200 nm. The above structural features can be adjusted by controlling the pore forming process. Optionally, the honeycomb pores have an average pore size of 50-100 nm, and the corrosion resistance and crack prevention effect of the plastic material and the stainless steel are optimal when the thickness of the oxide film ranges from 10 to 20 nm.

In particular, the plastic material may also be doped with a filling material, and the filling material is At least one of nylon fiber, carbon fiber, glass fiber, aramid fiber, calcium carbonate, magnesium carbonate, silicon dioxide, and clay, wherein the filler material accounts for a mass percentage of the plastic material in the range of 5 - 40wt%. The filler material may be doped in the plastic material prior to the injection molding process.

The coefficient of linear expansion of stainless steel is 1.5×10 ^-5 /°C, while the coefficient of linear expansion of plastic materials is 6-8×10 ^-5 /°C. The coefficient of linear expansion between stainless steel and plastic materials is not conducive to the curing of plastic materials. process. Therefore, it is necessary to modify the plastic material to reduce the coefficient of linear expansion of the plastic material. For example, the glass fiber material has a linear expansion coefficient of only 3.8 × 10 ^-5 / ° C, and a material such as glass fiber can be blended in the plastic material so that the linear expansion coefficient of the plastic material composition is as close as possible to the stainless steel.

The present invention also provides a method for processing a combination of stainless steel and plastic. First, a stainless steel substrate is provided, and the stainless steel substrate is etched to form honeycomb pores on the surface of the stainless steel substrate; The stainless steel substrate is subjected to a high temperature oxidation treatment to form an oxide film on the surface of the stainless steel substrate, the oxide film including at least two of iron oxide, chromium oxide or nickel oxide, for example, iron oxide and chromium may be contained. An oxide, or may comprise iron oxide, chromium oxide, nickel oxide, etc., said high temperature oxidation treatment temperature range of 110-450 degrees Celsius, treatment time of 120-10 minutes; finally, on the stainless steel substrate The plastic material is surface-molded so that a part of the structure of the plastic material is embedded in the honeycomb pores to form an integrated combination of stainless steel and plastic. The combination of stainless steel and plastic provided by the present invention can be prepared by the processing method provided by the present invention.

In a preferred embodiment of the present invention, the high temperature oxidation treatment is performed by heat treatment for 90 to 30 minutes in a temperature range of 200 to 300 degrees Celsius, and the quality of the oxide film formed is good.

Alternatively, after the high temperature oxidation treatment, the stainless steel substrate may be subjected to a boring treatment, the stainless steel substrate is immersed in the porogen, and the stainless steel substrate is taken out after immersion for a certain period of time. The reaming treatment can improve the surface characteristics of the oxide film, so that the plastic material can be better filled into the honeycomb pores in the subsequent injection molding process, and the plastic material is solidified and embedded in the honeycomb pores. The pore-treating agent may be at least one of terephthalic acid, ethylenediaminetetraacetic acid, p-nitrobenzenesulfonic acid, water-soluble amino acid, ethylenediamine, triethanolamine, ammonia, ethyl chloride, and epichlorohydrin. Kind. After the stainless steel substrate is taken out from the porogen, it can be dried naturally or washed. The pore-penetrating agent uniformly attached to the oxide layer can physically and chemically react with the plastic material in the injection molding process, so that the plastic material accelerates into the honeycomb-like pores, and the bonding force between the plastic and the stainless steel member is remarkably improved.

Alternatively, the high temperature oxidation treatment for forming the oxide film may be carried out in an atmosphere having an oxygen volume content of from 75% to 100%, preferably a volume content of oxygen of ≥99%, and further may be carried out under a pure oxygen atmosphere. The material and thickness of the oxide film can be controlled by adjusting the oxygen content in the atmosphere of the high temperature oxidation treatment. The above parameters can be adjusted according to the performance requirements of the bonding member, which is not limited by the present invention.

The step of pretreatment may also be included prior to etching the stainless steel substrate. Alternatively, the degreasing and degreasing treatment of the stainless steel substrate may be performed in advance. The stainless steel substrate was soaked in a stainless steel cleaning agent at 35-80 ° C for 60-600 s, and then washed in pure water having a conductivity of less than 20 us/cm for 60 s. The stainless steel cleaning agent is an acid, a base or an organic solvent of 100 to 300 g/L.

Alternatively, the surface layer of the stainless steel substrate can also be subjected to de-natural oxide treatment. The degreased stainless steel substrate is immersed in a 40-80 ° C removal solution for about 60 s, then placed in a neutralizing solution for about 60 s, and then washed in pure water. The membrane removing solution is an alkaline solution of 5-10 vol.% sodium hydroxide or potassium hydroxide, and the neutralizing liquid is 100-300 g/L of dilute nitric acid and sulfuric acid liquid and neutralizing alkali residue on the stainless steel substrate. Solution. Its main purpose is to remove the natural oxide film formed on the surface of the stainless steel substrate, and to eliminate the adverse effect of the uneven oxide film on the etching process.

The etching treatment of the stainless steel substrate may be performed by chemical etching or electrochemical etching. The present invention does not limit this, and a specific etching treatment may be selected according to the structure and performance requirements of the honeycomb pores.

For chemical etching, the stainless steel substrate may be immersed in a chemical etching solution of 30-90 degrees Celsius for 10-120 minutes, and the chemical etching solution is sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, boric acid, formic acid, propionic acid, butyric acid, At least one of alginic acid, oxalic acid, citric acid, and caprolactam. Alternatively, the entire etching process to form a hole may include a plurality of different chemical etching steps to control the pore-forming effect of the pore size, distribution, and the like of the honeycomb pores.

For electrochemical etching, the stainless steel substrate can be used as an anode to electrochemically etch a region where the honeycomb pores are to be formed, and the electrochemical etching voltage ranges from 5 to 60 V for a duration of 10 to 100 minutes.

In particular, it is also possible to employ chemical etching and electrochemical etching, respectively, in different steps of the entire etching process. This etching method can obtain richer pore-forming control effects. For example, chemical etching can be used to form pores with larger pore diameters, and then electrochemical etching etching is used to form honeycomb pores having smaller pore diameters.

While the invention has been described in detail with reference to the preferred embodiments of the present invention, it is understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A joint of stainless steel and plastic, characterized in that the joint comprises a stainless steel substrate, and the surface of the stainless steel substrate is formed with honeycomb pores, which are oxidized at a high temperature of 110-450 degrees Celsius for 120-10 minutes. Processing, an oxide film is formed on a surface of the honeycomb pore, the oxide film comprising at least two of iron oxide, chromium oxide or nickel oxide, and the stainless steel substrate is injection-molded with a plastic material, The plastic material is embedded in the honeycomb pores.
The combination of stainless steel and plastic according to claim 1, wherein said oxide film comprises at least iron oxide and chromium oxide.
The combination of stainless steel and plastic according to claim 1 or 2, wherein the high temperature oxidation treatment has a temperature in the range of 200 to 300 degrees Celsius and a treatment time of 90 to 30 minutes.
A combination of stainless steel and plastic according to any one of claims 1 to 3, wherein the plastic material is made of polyphenylene sulfide resin, polybutylene terephthalate resin, polyamide, polycarbonate, and Made of at least one material in the polyolefin.
The combination of stainless steel and plastic according to any one of claims 1 to 4, wherein the honeycomb pores have an average pore diameter ranging from 10 to 150 nm, and the honeycomb pores are from the surface of the stainless steel substrate. The average depth extending into the interior ranges from 10 to 200 nm.
A combination of stainless steel and plastic according to any one of claims 1 to 5, wherein the oxide film has a thickness ranging from 1 to 20 nm.
The combination of stainless steel and plastic according to any one of claims 1 to 6, wherein a surface of the oxide film is adsorbed with a layer of a pore-forming agent, and the pore-piercing agent is terephthalic acid or ethylenediamine. At least one of tetraacetic acid, p-nitrobenzenesulfonic acid, water-soluble amino acid, ethylenediamine, triethanolamine, aqueous ammonia, ethyl chloride, and epichlorohydrin.
The combination of stainless steel and plastic according to any one of claims 1 to 7, wherein the plastic material is doped with a filler material, which is nylon fiber, carbon fiber, glass fiber, aromatic poly At least one of an amide fiber, a calcium carbonate, a magnesium carbonate, a silica, and a clay, the percentage by mass of the filler material in the plastic material is 5-40% by weight.
A method for processing a combination of stainless steel and plastic, characterized in that a stainless steel substrate is provided; an etching process is performed on the stainless steel substrate, and honeycomb pores are formed on the surface of the stainless steel substrate; and the stainless steel substrate is subjected to high temperature oxidation. Processing, forming an oxide film on the surface of the stainless steel substrate, the oxide film comprising at least two of iron oxide, chromium oxide or nickel oxide, and the temperature range of the high temperature oxidation treatment is 110-450 degrees Celsius, The treatment time is 120-10 minutes; the plastic material is injection molded on the surface of the stainless steel substrate, and a partial structure of the plastic material is embedded in the honeycomb pores to form an integrated combination of stainless steel and plastic.
The processing method according to claim 9, wherein the oxide film comprises at least iron oxide and chromium oxide.
The processing method according to claim 9 or 10, wherein the high temperature oxidation treatment has a temperature in the range of 200 to 300 ° C and a treatment time of 90 to 30 minutes.
The processing method according to any one of claims 9 to 11, characterized in that the volume content of oxygen in the atmosphere of the high temperature oxidation treatment is ≥ 99%.
The processing method according to any one of claims 9 to 12, characterized in that after the high-temperature oxidation treatment, the honeycomb pores are subjected to a boring treatment, and the stainless steel substrate is introduced into the pore-forming agent, the pore-piercing agent It is at least one of terephthalic acid, ethylenediaminetetraacetic acid, p-nitrobenzenesulfonic acid, water-soluble amino acid, ethylenediamine, triethanolamine, ammonia, ethyl chloride, and epichlorohydrin.
The processing method according to any one of claims 9 to 13, wherein the etching treatment is chemical etching, and the stainless steel substrate is immersed in a chemical etching solution of 30-90 degrees Celsius for 10 to 120 minutes, chemical etching. The liquid is at least one of sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, boric acid, formic acid, propionic acid, butyric acid, alginic acid, oxalic acid, citric acid, and caprolactam.
The processing method according to any one of claims 9 to 14, wherein the etching treatment is electrochemical etching, and the stainless steel substrate is used as an anode to electrochemically etch a region where the honeycomb pores are to be formed. The electrochemical etching has a voltage range of 5-60 V and a duration of 10-100 minutes.