CN111748763A - Method for enhancing adsorption capacity of stainless steel by magnet, supporting device and electronic equipment - Google Patents
Method for enhancing adsorption capacity of stainless steel by magnet, supporting device and electronic equipment Download PDFInfo
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- CN111748763A CN111748763A CN201910233248.5A CN201910233248A CN111748763A CN 111748763 A CN111748763 A CN 111748763A CN 201910233248 A CN201910233248 A CN 201910233248A CN 111748763 A CN111748763 A CN 111748763A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Mechanical Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The application provides a method for enhancing the adsorption capacity of stainless steel by a magnet, a supporting device and electronic equipment, wherein the method for enhancing the adsorption capacity of the stainless steel by the magnet comprises the following steps: providing an austenitic stainless steel blank, the austenitic stainless steel blank having a first magnetic property; and processing the austenitic stainless steel blank to form at least part of a magnetic attraction piece, wherein the processed blank has a second magnetism, and the second magnetism is larger than the first magnetism. By the method, the capability of the austenitic stainless steel to be adsorbed by the magnet can be improved, and the austenitic stainless steel is more flexible to apply.
Description
Technical Field
The application relates to the technical field of machinery, in particular to a method for enhancing the adsorption capacity of stainless steel by a magnet, a supporting device and electronic equipment.
Background
With the development of the form of electronic equipment, the electronic equipment needs to be adsorbed by a magnet, the existing austenitic stainless steel has weak adsorption capacity by the magnet, and the adsorption capacity of martensite and ferrite stainless steel is too strong, so that the requirement for adjusting the adsorption capacity of the magnet for adsorbing the stainless steel is met.
Disclosure of Invention
The application provides a method for enhancing the adsorption capacity of stainless steel by a magnet. The method for enhancing the adsorption capacity of the stainless steel by the magnet comprises the following steps:
providing an austenitic stainless steel blank, the austenitic stainless steel blank having a first magnetic property;
and processing the austenitic stainless steel blank to form at least part of a magnetic attraction piece, wherein the processed blank has a second magnetism, and the second magnetism is larger than the first magnetism.
The method for enhancing the magnet adsorption capacity of the stainless steel provided by the embodiment of the application comprises the steps of providing an austenitic stainless steel blank, wherein the austenitic stainless steel blank has first magnetism; and then processing the austenitic stainless steel blank to form at least part of the magnetic attraction piece, wherein the processed blank has a second magnetism, and the second magnetism is larger than the first magnetism. Through processing the austenitic stainless steel, the second magnetism of the processed blank is larger than the first magnetism of the austenitic stainless steel blank which is originally provided, so that the capacity of increasing the adsorption of the austenitic stainless steel blank by a magnet is achieved, and the use requirement of the stainless steel on products is further met.
The embodiment of the application further provides a supporting device, the supporting device comprises a base and a support, the base is connected with the support in a rotating mode, magnets are arranged on the base, the support can be adsorbed by the magnets to enable the support to cover the base, the support is made of stainless steel, and the support is processed by a method for enhancing the adsorption capacity of the stainless steel by the magnets according to any embodiment.
The embodiment of the application further provides electronic equipment, the electronic equipment comprises a screen and the supporting device provided by any one of the above embodiments, and when the support rotates relative to the base to form a turnover angle, the support can support the screen.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for enhancing the attraction capacity of stainless steel to a magnet according to an embodiment of the present application.
Fig. 2 is a partial flowchart corresponding to step S200 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 3 is a partial flowchart corresponding to step S210 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 4 is a partial flowchart corresponding to step S220 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 5 is a partial flowchart corresponding to step S200 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 6 is a partial flowchart corresponding to step S240 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 7 is a partial flowchart corresponding to step S240 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 8 is a partial flowchart corresponding to step S200 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 9 is a partial flowchart corresponding to step S200 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 10 is a partial flowchart corresponding to step S280 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 11 is a partial flowchart corresponding to step S200 of the method for enhancing the attraction capability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 12 is a partial flowchart corresponding to step S203 of the method for enhancing the attraction ability of the stainless steel to the magnet according to the embodiment of the present application.
Fig. 13 is a schematic structural view of a support device in a buckling state according to an embodiment of the present application.
Fig. 14 is a schematic structural diagram of a support device provided in an embodiment of the present application in an inverted state.
Fig. 15 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive effort based on the embodiments in the present application are within the scope of protection of the present application.
Referring to fig. 1, in one embodiment, the method for enhancing the attraction force of the stainless steel to the magnet includes, but is not limited to, steps S100 and S200, and the steps S100 and S200 are described in detail below.
S100: an austenitic stainless steel blank is provided, the austenitic stainless steel blank having a first magnetic property.
S200: and processing the austenitic stainless steel blank to form at least part of a magnetic attraction piece, wherein the processed blank has a second magnetism, and the second magnetism is larger than the first magnetism.
Among them, austenitic stainless steel is stainless steel having an austenitic structure at normal temperature. The steel has a stable austenitic structure when it contains about 18% Cr, about 8% to 25% Ni, and about 0.1% C. Austenitic stainless steel is non-magnetic, has high toughness and plasticity.
Wherein, magnetism refers to the property that an object is attracted or repelled by an external magnetic field. In the present application, magnetic properties refer to the ability to be attracted to a magnet.
Stainless steel is mainly classified into three major groups: austenitic stainless steels (200, 304 series), ferritic stainless steels (405, 403), martensitic stainless steels (410). The austenitic stainless steel has high nickel content and no magnetism, and cannot be adsorbed by a magnet. The ferrite stainless steel band has magnetism, can lead magnetism, can be adsorbed by magnet. The martensitic stainless steel has high chromium content and magnetism and can be adsorbed by a magnet. The 304 stainless steel is not stable and generally has no magnetism, but the microstructure can also change through cold processing in the smelting process, the former austenite can gradually transform to martensite, the longer the processing time is, the larger the deformation is, the more the martensite transformation is, the stainless steel can generate weak magnetism and can be adsorbed by a magnet.
When an austenitic stainless steel blank is processed, a stainless steel blank with a part of austenite components is transformed into a stainless steel blank with martensite components, and the magnetism of martensite is stronger than that of austenite, so that after the stainless steel with austenite components is transformed into the stainless steel with martensite components, the magnetism of the processed blank is increased, namely, the second magnetism of the processed blank is larger than the first magnetism of the austenitic stainless steel blank in the initial state.
The method for enhancing the magnet adsorption capacity of the stainless steel provided by the embodiment of the application comprises the steps of providing an austenitic stainless steel blank, wherein the austenitic stainless steel blank has first magnetism; and then processing the austenitic stainless steel blank to form at least part of the magnetic attraction piece, wherein the processed blank has a second magnetism, and the second magnetism is larger than the first magnetism. Through processing the austenitic stainless steel, the second magnetism of the processed blank is larger than the first magnetism of the austenitic stainless steel blank which is originally provided, so that the capacity of increasing the adsorption of the austenitic stainless steel blank by a magnet is achieved, and the use requirement of the stainless steel on products is further met.
With continued reference to fig. 2, in one possible implementation, the "S200: the processing of the austenitic stainless steel blank "includes, but is not limited to, steps S210, S220, and S230, and the details regarding steps S210, S220, and S230 are described below.
S210: an austenitic stainless steel blank is heat treated to obtain a first blank.
S220: and nitriding the first blank to obtain a second blank.
S230: and carrying out surface treatment on the second blank to obtain a third blank.
Wherein, the heat treatment refers to a metal hot working process for obtaining expected structure and performance by heating, insulating and cooling the material in a solid state. The nitriding treatment refers to a chemical heat treatment process for making nitrogen atoms penetrate into the surface layer of a workpiece in a certain medium at a certain temperature. The product after nitriding treatment has the characteristics of excellent wear resistance, fatigue resistance, corrosion resistance and high temperature resistance. The surface treatment is a process of artificially forming a surface layer having mechanical, physical and chemical properties different from those of the second blank on the surface of the second blank. The purpose of the surface treatment is to meet the requirements of corrosion resistance, wear resistance, decoration or other special functions of the product.
The heat treatment process of the austenitic stainless steel blank specifically comprises the following steps: the austenitic stainless steel blank is heated to 1050-. Meanwhile, in order to eliminate the internal stress of the blank, high-temperature tempering treatment is adopted, the tempering treatment temperature is 660-700 ℃, the tempering treatment time is 2 hours, and finally natural cooling is carried out at room temperature.
Wherein the nitriding treatment is mainly to treat the nitride so that nitrogen atoms in the nitride penetrate into the first blank to obtain a second blank.
The specific process of the nitriding treatment is as follows: in a well-type nitriding furnace, the uniformity of the furnace temperature is adjusted to +/-5 ℃, and a gas circulating device is arranged in the furnace. And (3) adopting ammonia gas as a penetrating agent, and exhausting air in the furnace by adopting ammonia gas after the first blank is put into the furnace. And when the ammonia gas decomposition rate is close to zero measured at the temperature lower than 200 ℃, raising the furnace temperature to the nitriding temperature of 510-. 4-6 hours after the nitriding lasts for enough time, ammonia gas can be continuously introduced to maintain the positive pressure in the furnace to cool along with the furnace, when the temperature of the furnace is reduced to be less than or equal to 150 ℃, the blank can be taken out by stopping supplying ammonia gas, and the rapid cooling is avoided to prevent the deformation of parts. After nitriding treatment, the thickness of the magnetic attraction layer is tested by adopting a metallographic method, and when the thickness is within the range of 0.2-0.5 mm, the magnetic performance requirement of the product is met.
The surface treatment of the second blank may be a physical vapor deposition treatment of the second blank, where the physical vapor deposition is a process of transferring atoms or molecules from a source to the surface of the second blank by using a physical process to realize substance transfer. It has the function of enabling certain particles with special properties (high strength, wear resistance, heat dissipation, corrosion resistance and the like) to be sprayed on the second blank with lower properties, so that the third blank with better properties can be obtained. The basic method of physical vapor deposition: vacuum evaporation, sputtering, ion plating (hollow cathode ion plating, hot cathode ion plating, arc ion plating, active reactive ion plating, radio frequency ion plating, direct current discharge ion plating).
It should be noted that the first blank, the second blank, … …, the nth blank, etc. mentioned in the present application are names of staged products obtained by processing the blanks, and do not indicate that N blanks are generated.
With continued reference to fig. 3, in one possible implementation, the "S210: the austenitic stainless steel blank is heat treated to obtain the first blank member "including, but not limited to, steps S211, S212, S213, and S214, as described below with respect to steps S211, S212, S213, and S214.
S211: and (4) preheating and heat-preserving the austenitic stainless steel blank.
S212: and quenching the austenitic stainless steel blank subjected to preheating and heat preservation treatment to obtain a fourth blank.
S213: tempering the fourth blank to obtain a fifth blank.
S214: naturally cooling the fifth blank.
The temperature for preheating the austenitic stainless steel blank can be 1050-.
The quenching is a heat treatment process in which an austenitic stainless steel blank is heated and then cooled in a suitable manner to obtain a martensitic structure. The most common are water-cooling quenching, oil-cooling quenching, air-cooling quenching, etc. Tempering refers to a metal heat treatment process in which the quenched fourth blank is reheated to a temperature lower than the lower critical temperature Ac1 (the starting temperature of pearlite transformation to austenite during heating), and cooled in a medium such as air, water, oil, or the like after holding for a certain period of time. Or heating the quenched fourth blank to a proper temperature, keeping the temperature for a plurality of times, and then slowly or rapidly cooling. Generally to reduce or eliminate internal stresses in the quenched fourth blank, or to reduce its hardness and strength to improve its ductility or toughness. The quenched fourth blank should be tempered in time, and the required mechanical properties can be obtained through the cooperation of quenching and tempering. Natural cooling is cooling at room temperature. The so-called room temperature is 25 ℃.
With continued reference to fig. 4, in one possible implementation, the "S220: the nitriding process is performed on the first blank to obtain the second blank ", including but not limited to steps S221, S222, S223 and S224, which are described below with respect to steps S221, S222, S223 and S224.
S221: and carrying out sand blasting on the first blank to remove oxides on the surface of the first blank.
S222: and carrying out anhydrous ammonium chloride treatment on the first blank after the surface oxide is removed so as to form an oxide film on the surface of the first blank.
S223: and putting ammonia gas and the first blank with the oxide film into a reaction furnace together for heating and heat preservation treatment, so that nitrogen atoms decomposed from the ammonia gas penetrate into the first blank to obtain a sixth blank.
S224: and cooling the sixth blank.
The sand blasting process adopts compressed air as power to form a high-speed spraying beam to spray spraying materials (copper ore sand, quartz sand, carborundum, iron sand and sea sand) to the surface of the first blank to be processed at a high speed, so that the appearance or the shape of the surface of the first blank is changed. Due to the impact and cutting action of the abrasive on the surface of the first blank, the surface of the first blank obtains certain cleanliness and different roughness, the mechanical property of the surface of the first blank is improved, and the oxide on the surface of the first blank can be removed, so that the preparation is provided for the subsequent nitriding treatment process. Specifically, in the embodiment, quartz sand or iron sand of 70-200 meshes is used, and the surface of the first blank is sprayed under the action of 0.2-0.5MPa of sand blasting pressure to remove the surface oxide of the first blank.
The anhydrous ammonium chloride treatment refers to a process of scattering anhydrous ammonium chloride in a nitriding box during production, and reducing the oxide on the surface of the first blank by hydrogen chloride decomposed from the ammonium chloride during heating.
With continued reference to fig. 5, in one possible implementation, the "S200: processing the austenitic stainless steel blank to form at least a portion of the magnetically attractive element "includes, but is not limited to, step S240, which is described below with respect to step S240.
S240: and carrying out plating treatment on the austenitic stainless steel blank, wherein the plating layer forms the magnetic part.
The plating layer can be formed by chemical reaction or electroplating. The coating is a martensite component, has strong magnetism and can be adsorbed by a magnet.
With continued reference to fig. 6, in one possible implementation, the "S240: the austenitic stainless steel blank is subjected to a plating process, the plating layer forming the magnetically attractive element "includes, but is not limited to, step S241, which is described below with respect to step S241.
S241: and immersing the austenitic stainless steel blank into a mixed solution prepared from nickel sulfate, sodium dihydrogen hypophosphite, sodium acetate and boric acid, so that nickel ions in the solution are deposited on the surface of the austenitic stainless steel blank to form a nickel coating.
In this embodiment, the plating layer is formed by a chemical reaction. Specifically, a layer of nickel is deposited on the surface of an austenitic stainless steel blank by the action of oxidation and reduction without using an external current, and is used for improving the corrosion resistance and the wear resistance of the austenitic stainless steel blank, and increasing the luster and the appearance. The bright nickel plating suitable for small tubular parts or parts with complex shapes is adopted, and polishing treatment is not needed. The austenitic stainless steel blank is immersed in a mixed solution prepared by nickel sulfate, sodium dihydrogen hypophosphite, sodium acetate and boric acid, and changes under certain acidity and temperature, nickel ions in the solution are reduced into atoms by the sodium dihydrogen hypophosphite and deposited on the surface of the workpiece, and a fine and bright nickel coating is formed. The austenitic stainless steel blank may be directly nickel plated. In order to ensure that the magnetism of the processed austenitic stainless steel billet piece meets the product requirement, the thickness of a plating layer formed by nickel plating is 0.05-1.0 mm.
Furthermore, the strength of magnetism in the chemical nickel plating layer depends on the phosphorus content and the heat treatment temperature, and the phosphorus content of the weak-magnetism plating layer is 8 percent; the phosphorus content of the completely non-magnetic phosphorus is more than 11.4 percent; only the coating with the phosphorus content of less than 8 percent has magnetism; the strength of the magnetism can be improved by heat treatment, and the following heat treatment parameters are: the heat treatment is carried out at the temperature of 300 ℃ and 400 ℃, the coating structure is changed from amorphous to microcrystalline under the protection of a vacuum environment or inert atmosphere for 0.5 to 2 hours, and the coating performance can be improved.
With continued reference to fig. 7, in one possible implementation, the "S240: the austenitic stainless steel blank is subjected to a plating process, the plating forming the magnetically attractive element "includes, but is not limited to, step S242, which is described below with respect to step S242.
S242: and (3) carrying out nickel electroplating treatment on the austenitic stainless steel blank so that partial nickel ions are deposited on the surface of the austenitic stainless steel blank to form a nickel coating.
In this embodiment mode, the plating layer is formed by nickel electroplating. Specifically, a layer of nickel is deposited on the surface of an austenitic stainless steel blank by means of electrochemical action. Can be used as surface coating and chrome plating primer, prevent corrosion, increase wear resistance and luster, and beautify appearance. The phosphorus content is below 8 percent, and the thickness is 0.05-1.0 mm, so that the magnetic use requirement can be met. In addition, the magnetic properties can be improved by overheating treatment, with the following heat treatment parameters: heat treatment at 400 ℃ at 300 ℃ for 0.5-2 hours under the protection of vacuum environment or inert atmosphere.
With continued reference to fig. 8, in one possible implementation, the "S200: processing the austenitic stainless steel blank to form at least a partially magnetically attractive element "includes, but is not limited to, steps S250 and S260, described below with respect to steps S250 and S260.
S250: and heating and carrying out heat preservation treatment on the austenitic stainless steel blank to obtain a seventh blank.
S260: quenching the seventh blank member to transform a portion of austenite in the austenitic stainless steel blank member into martensite.
Specifically, in the present embodiment, the heat treatment process specifically includes: heating a stainless steel 304 sample to 1050-.
With continued reference to fig. 9, in one possible implementation, the "S200: processing the austenitic stainless steel blank to form at least a portion of the magnetically attractive element "includes, but is not limited to, steps S270 and S280, described below with respect to steps S270 and S280.
S270: and heating and carrying out heat preservation treatment on the austenitic stainless steel blank to obtain a seventh blank.
S280: and cooling the seventh blank, wherein the cooling time length is less than a preset time length, so that part of austenite in the austenitic stainless steel blank is converted into martensite.
Specifically, in the present embodiment, the heat treatment process specifically includes: heating a stainless steel 304 sample to 1050-.
With continued reference to fig. 10, in one possible implementation, the "S280: cooling the seventh blank member, and making the cooling time length less than the preset time length "includes, but is not limited to, step S281, which is described below with respect to step S281.
S281: the seventh blank is left at normal temperature and subjected to a blowing treatment.
With continued reference to fig. 11, in one possible implementation, the "S200: cooling the seventh blank in such a manner that the cooling time is less than the preset time "includes, but is not limited to, steps S201, S202, and S203, which are described below with respect to steps S201, S202, and S203.
S201: the austenitic stainless steel blank is subjected to a press process to obtain an eighth blank member.
S202: and carrying out sand blasting on the eighth blank to remove oxides on the surface of the eighth blank.
S203: forging the eighth blank after removing the surface oxide to generate phase transformation of the eighth blank.
The stamping process is a forming method in which an external force is applied to a plate, a strip, a pipe, a profile, or the like by means of a press and a die to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) having a desired shape and size.
Wherein, the process of sand blasting is as follows: and (3) spraying the surface of the eighth blank by using 70-200 meshes of quartz sand or iron sand under the action of 0.2-0.5MPa of sand blasting pressure to remove the surface oxide of the eighth blank.
The forging treatment is a processing method for obtaining a forging with certain mechanical property, certain shape and size by applying pressure to a metal blank by using a forging machine to generate plastic deformation, and one of two main components of forging (forging and stamping) is adopted. The defects of casting-state looseness and the like generated in the smelting process of metal can be eliminated through forging, the microstructure is optimized, and the mechanical property of the forging is generally superior to that of a casting made of the same material.
With continued reference to fig. 12, in one possible implementation, the "S203: the forging process "performed on the eighth blank after the surface oxide is removed includes, but is not limited to, steps S204 and S205, which are described below with respect to steps S204 and S205.
S204: forging the eighth blank after removing the surface oxide with a first forging die to change a dimension of the eighth blank from a first dimension to a second dimension, wherein the first dimension is greater than the second dimension.
S205: and forging the eighth blank forged by the first forging die by using a second forging die so as to change the size of the eighth blank from the second size to a preset size, wherein the preset size is the size of the eighth blank meeting the product requirement.
The first size refers to the original thickness of the stainless steel material, the first forging amount is 3 mm to 2.2 mm and the second forging amount is 2.2 mm to the actual required size of the product by adjusting the first forging die and the second forging die under the action of a 60-ton forging press, wherein the assumed thickness is 3 mm. Through forging many times, can improve the metallographic structure of eighth blank, help obtaining the good comprehensive properties of blank.
With continued reference to fig. 13 and 14, a supporting device 10 is further provided in an embodiment of the present application, where the supporting device 10 includes a base 100 and a bracket 200 rotatably connected to each other, a magnet 150 is disposed on the base 100, the bracket 200 can be attracted by the magnet 150 to cover the base 100 with the bracket 200, the bracket 200 is made of a stainless steel material, and the bracket 200 is processed by the method provided in any of the above embodiments to enhance the attraction ability of the magnet 150 to the stainless steel.
The bracket 200 is made of stainless steel, and because the austenitic stainless steel is relatively weak in ability of being adsorbed by the magnet 150, if the bracket 200 is directly formed by processing the austenitic stainless steel, the bracket 200 may be detached from the magnet 150, and normal use of the support device 10 cannot be satisfied. The martensitic stainless steel and the ferritic stainless steel have strong adsorption ability by the magnet 150, and if the martensitic stainless steel and the ferritic stainless steel are directly processed to form the bracket 200, the bracket 200 may be firmly adsorbed by the magnet 150, which is not favorable for the turning action of the bracket 200 relative to the base 100, and also cannot meet the normal use requirement of the supporting device 10. Therefore, in the present application, the austenitic stainless steel is treated to enhance the ability of being attracted by the magnet 150, and the bracket 200 formed by the above process has good attraction performance by the magnet 150 and adjustable magnetic strength.
In a possible embodiment, the bracket 200 includes a support and an adsorbing member, the adsorbing member is made of stainless steel, and the adsorbing member is manufactured after the above process is performed, so that the adsorbing member has good performance of being adsorbed by the magnet 150, and the magnetic strength can be adjusted.
Further, the base 100 includes a first side wall 101 and a second side wall 102 disposed opposite to each other, the bracket 200 is rotatably connected to the base 100 by a rotating shaft 160, the rotating shaft 160 is located at a side adjacent to the first side wall 101, and the magnet 150 is located at the second side wall 102.
When the shaft 160 is located adjacent to the first sidewall 101 of the base 100 and the magnet 150 is located adjacent to the second sidewall 102 of the base 100, the attraction of the magnet 150 to the rack 200 has the largest moment, and at this time, the rack 200 can be attracted by the magnet 150 with a smaller magnetic force.
With reference to fig. 15, an electronic device 1 is further provided in an embodiment of the present application, where the electronic device 1 includes a screen 20 and the supporting device 10 provided in any of the above embodiments, and when the stand 200 rotates relative to the base 100 to form a turning angle α, the stand 200 can support the screen 20.
The electronic device may be any device having communication and storage functions. For example: the system comprises intelligent equipment with a network function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like.
Specifically, the electronic device 1 in the present application is a split type electronic device, and includes a supporting device 10 and a screen 20, and when a stand 200 of the supporting device 10 forms a turning angle α with respect to a base 100, the stand 200 can form a support for the screen 20. The support device 10 further includes a controller for controlling related functions of the screen 200, such as controlling the volume, and controlling the bright and dark screens of the screen 200.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (15)
1. A method for enhancing the attraction ability of stainless steel to a magnet, comprising:
providing an austenitic stainless steel blank, the austenitic stainless steel blank having a first magnetic property;
and processing the austenitic stainless steel blank to form at least part of a magnetic attraction piece, wherein the processed blank has a second magnetism, and the second magnetism is larger than the first magnetism.
2. The method of enhancing the attraction of stainless steel to a magnet according to claim 1, wherein said "treating the austenitic stainless steel blank" comprises:
heat treating an austenitic stainless steel blank to obtain a first blank;
nitriding the first blank to obtain a second blank;
and carrying out surface treatment on the second blank to obtain a third blank.
3. The method of enhancing the attraction of stainless steel to a magnet according to claim 2, wherein heat treating the austenitic stainless steel blank to obtain the first blank comprises:
preheating and heat-preserving austenitic stainless steel blanks;
quenching the austenitic stainless steel blank subjected to preheating and heat preservation treatment to obtain a fourth blank;
tempering the fourth blank to obtain a fifth blank;
naturally cooling the fifth blank.
4. The method for enhancing the attraction force of stainless steel to a magnet according to claim 2, wherein the step of nitriding the first blank to obtain the second blank comprises:
performing sand blasting on the first blank to remove oxides on the surface of the first blank;
carrying out anhydrous ammonium chloride treatment on the first blank after the surface oxide is removed so as to form an oxide film on the surface of the first blank;
placing ammonia gas and the first blank with the oxide film in a reaction furnace together for heating and heat preservation treatment so that nitrogen atoms decomposed from the ammonia gas penetrate into the first blank to obtain a sixth blank;
and cooling the sixth blank.
5. The method of claim 1, wherein processing the austenitic stainless steel blank to form at least a portion of the magnetically attractive element comprises:
and carrying out plating treatment on the austenitic stainless steel blank, wherein the plating layer forms the magnetic part.
6. The method of enhancing the attraction of stainless steel to a magnet according to claim 5, wherein the "plating the austenitic stainless steel blank" comprises:
and immersing the austenitic stainless steel blank into a mixed solution prepared from nickel sulfate, sodium dihydrogen hypophosphite, sodium acetate and boric acid, so that nickel ions in the solution are deposited on the surface of the austenitic stainless steel blank to form a nickel coating.
7. The method of enhancing the attraction of stainless steel to a magnet according to claim 5, wherein the "plating the austenitic stainless steel blank" comprises:
and (3) carrying out nickel electroplating treatment on the austenitic stainless steel blank so that partial nickel ions are deposited on the surface of the austenitic stainless steel blank to form a nickel coating.
8. The method of claim 1, wherein processing the austenitic stainless steel blank to form at least a portion of the magnetically attractive element comprises:
heating and heat-preserving the austenitic stainless steel blank to obtain a seventh blank;
quenching the seventh blank member to transform a portion of austenite in the austenitic stainless steel blank member into martensite.
9. The method of claim 1, wherein processing the austenitic stainless steel blank to form at least a portion of the magnetically attractive element comprises:
heating and heat-preserving the austenitic stainless steel blank to obtain a seventh blank;
and cooling the seventh blank, wherein the cooling time length is less than a preset time length, so that part of austenite in the austenitic stainless steel blank is converted into martensite.
10. The method of enhancing stainless steel attraction by a magnet of claim 9, wherein said cooling the seventh blank for a cooling time period less than a predetermined time period comprises:
the seventh blank is left at normal temperature and subjected to a blowing treatment.
11. The method of claim 1, wherein processing the austenitic stainless steel blank to form at least a portion of the magnetically attractive element comprises:
stamping the austenitic stainless steel blank to obtain an eighth blank;
performing sand blasting on the eighth blank to remove oxides on the surface of the eighth blank;
forging the eighth blank after removing the surface oxide to generate phase transformation of the eighth blank.
12. The method of enhancing the attraction force of stainless steel to a magnet according to claim 11, wherein said forging the eighth blank after removing the surface oxide comprises:
forging the eighth blank after removing the surface oxide with a first forging die to change the size of the eighth blank from a first size to a second size, wherein the first size is larger than the second size;
and forging the eighth blank forged by the first forging die by using a second forging die so as to change the size of the eighth blank from the second size to a preset size, wherein the preset size is the size of the eighth blank meeting the product requirement.
13. A support device, comprising a base and a bracket which are rotatably connected, wherein the base is provided with a magnet, the bracket can be attracted by the magnet to enable the bracket to cover the base, the bracket is made of stainless steel, and the bracket is treated by the method for enhancing the attraction capability of the stainless steel to the magnet according to any one of claims 1 to 12.
14. The support device of claim 13, wherein the base includes a first side wall and a second side wall opposite to each other, the bracket is rotatably connected to the base by a rotating shaft, the rotating shaft is located at a side adjacent to the first side wall, and the magnet is located at the second side wall.
15. An electronic device comprising a screen and a support device according to any of claims 13-14, wherein the support device is configured to support the screen when the stand is rotated relative to the base to form a flip angle.
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