CN113386414A - Composite aluminum alloy plate as electronic product shell and manufacturing method thereof - Google Patents
Composite aluminum alloy plate as electronic product shell and manufacturing method thereof Download PDFInfo
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- CN113386414A CN113386414A CN202010169544.6A CN202010169544A CN113386414A CN 113386414 A CN113386414 A CN 113386414A CN 202010169544 A CN202010169544 A CN 202010169544A CN 113386414 A CN113386414 A CN 113386414A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/04—Metal casings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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Abstract
The utility model provides a compound aluminum alloy plate as electronic product shell and manufacturing method thereof, compound aluminum alloy plate's structure including mutually superpose first kind aluminum alloy plate and second kind aluminum alloy plate that compound is in the same place, thereby wherein first kind aluminum alloy plate and second kind aluminum alloy plate superpose compound aluminium alloy plate that has three layer construction mutually through hot rolling technology, then pass through cold rolling technology with compound aluminum alloy plate by thick to thin rolling to required thickness, become compound aluminum alloy plate that has good stamping formability through T quenching and tempering technology and anodic oxidation treatment process again, wherein first kind aluminum alloy plate and second kind aluminum alloy plate select different series's aluminum alloy material for use, first kind aluminum alloy plate is as compound aluminum alloy plate's intermediate level in order to provide the required mechanical strength of electronic product shell, second kind aluminum alloy plate is suitable for anodic oxidation and dyeing to handle as compound aluminum alloy plate's skin in order to satisfy the outward appearance of electronic product shell And (5) beautifying requirements.
Description
Technical Field
The application relates to the field of aluminum alloy, in particular to a composite aluminum alloy plate serving as an electronic product shell and a manufacturing method thereof.
Background
Electronic products using aluminum alloy shells are visible everywhere in daily life and work, taking a smart phone as an example, a smart phone body is generally made of aluminum alloy materials, known aluminum alloy materials are respectively expressed by different aluminum alloy numbers (or called brands) according to different formulas, and the aluminum alloy materials with different aluminum alloy numbers have different mechanical strengths and characteristics. According to the mechanical strength, the pure aluminum strength of the aluminum alloy No. 1XXX is the lowest, and the aluminum-zinc-magnesium alloy of the 7XXX is the highest. The aluminum alloy number described herein is an aluminum alloy number, abbreviated as AA number, implemented by The american aluminum Association.
The shell made of aluminum alloy is usually subjected to surface anodic treatment based on the requirements of attractiveness and corrosion resistance, and is used for coloring the mobile phone body (shell), and the surface anodic treatment of the aluminum alloy material is to form an oxide film on the metal surface under the action of current, so that the shell is rich in color, attractive in color, good in electrical insulation property, hard and wear-resistant, and extremely high in corrosion resistance. According to the dyeing performance of various anodic oxide films, only the oxide film obtained by sulfuric acid anodic oxidation is most suitable for dyeing; other anode oxidation films such as oxalic acid and porcelain (micro-arc oxidation) can color, but the interference color is serious; chromic acid anodic oxide film or hard oxide film can not be colored, and sulfuric acid anodic oxidation is the best at present to achieve the purpose of coloring by anodic oxidation. Different grades of aluminium alloys have different compositions, heat treatment processes and corresponding working morphologies, and therefore they have different anodic oxidation characteristics, respectively.
Aluminum alloys of 5XXX and 6XXX series are preferable if the oxide film is required to be colorless and transparent after oxidation, and may be colored after oxidation. The 5XXX series aluminum alloy is also called "aluminum magnesium alloy", which is an aluminum alloy series having a wide range of applications, and has good corrosion resistance and good weldability. The series of aluminum alloys can be anodized, and if the magnesium content is higher, the brightness is not enough.
Stamping is a common basic means in the processing of aluminum alloy shells, the aluminum shells of various products can be obtained by combining processes such as stamping, numerical control processing and the like, and only or more than pure stamping is needed for completing part of the aluminum shells of the products. The stamping forming is a rolled plate with high production efficiency and excellent direct use performance, and has great market advantages and wide development prospect. However, the 7XXX series aluminum alloy material with higher mechanical strength has poorer appearance quality after anode surface treatment and poor stamping forming performance, and is not suitable for manufacturing the shell of an electronic product by adopting a stamping process; the housing made of 5XXX or 6XXX aluminum alloy is suitable for anode surface treatment and subsequent dyeing treatment to obtain excellent appearance, but the housing made of 5XXX or 6XXX aluminum alloy has weak mechanical strength.
For example, the housing of the famous smart phone product iPhone6 manufactured by apple inc is easy to bend and even break due to the 6XXX series aluminum alloy material. In order to solve the problem, the iPhone6s smart phone uses a 7XXX aluminum alloy material to make the housing, but the anode oxidation property of the housing made of the 7XXX aluminum alloy material is weaker than that of the housing made of the 6XXX aluminum alloy material, so that the oxide layer formed on the surface of the phone body is thinner, and the corrosion resistance is also poorer.
Disclosure of Invention
In view of solving the above-mentioned problems, a primary object of the present invention is to provide a composite aluminum alloy sheet for an electronic product housing and a method for manufacturing the same.
In order to solve the above problems of the known aluminum alloy housing, the composite aluminum alloy plate as the housing of the electronic product of the present application has a structure including: the first aluminum alloy plate and the second aluminum alloy plate are mutually overlapped and compounded together, the first aluminum alloy plate and the second aluminum alloy plate are made of aluminum alloy materials of different series, the aluminum alloy material selected for the first aluminum alloy plate contains any one of 6 XXX-8 XXX series aluminum alloys, the aluminum alloy material selected for the second aluminum alloy plate contains any one of 1 XXX-5 XXX series aluminum alloys, the first aluminum alloy plate and the second aluminum alloy plate are mutually overlapped and compounded through a hot rolling process to form the composite aluminum alloy plate with a three-layer structure, the composite aluminum alloy plate is rolled to the required thickness from thick to thin through a cold rolling process and then is subjected to a T tempering treatment process to a stable state, the first aluminum alloy plate is used as an intermediate layer of the composite aluminum alloy plate, the second aluminum alloy plate is used as an outer layer of the composite aluminum alloy plate, and the thickness ratio of the intermediate layer to the outer layer is (1-9): an outer side surface of a second aluminum alloy sheet as an outer layer of the composite aluminum alloy sheet has an anodized aluminum layer formed by an anodizing process.
One aspect of the present application provides a method for manufacturing a composite aluminum alloy sheet for an electronic product case, including the steps of:
preparing materials, namely preparing a first aluminum alloy plate and a second aluminum alloy plate, wherein the first aluminum alloy plate is made of an aluminum alloy material containing any one of 6 XXX-8 XXX series aluminum alloys, and the second aluminum alloy plate is made of an aluminum alloy material containing any one of 1 XXX-5 XXX series aluminum alloys;
hot rolling, namely overlapping and compounding a first aluminum alloy plate and a second aluminum alloy plate into a composite aluminum alloy plate with a three-layer structure by a hot rolling process, wherein the first aluminum alloy plate is used as a middle layer of the composite aluminum alloy plate, and the second aluminum alloy plate is used as an outer layer of the composite aluminum alloy plate;
and a cold rolling step, namely rolling the composite aluminum alloy plate from thick to thin to the required thickness by a cold rolling process, wherein the thickness ratio of the middle layer to the outer layer is (1-9): 1;
t thermal refining step, comprising: carrying out T thermal refining treatment on the composite aluminum alloy plate manufactured by the hot rolling process and the cold rolling process to a stable state; and
and an anodic oxidation treatment step of forming an anodic aluminum oxide layer on the outer side surface of the second aluminum alloy plate serving as the outer layer of the composite aluminum alloy plate by an anodic oxidation treatment process.
The composite aluminum alloy plate serving as the electronic product shell and the manufacturing method thereof have the advantages that the thickness of the composite aluminum alloy plate is 0.1-6.0 mm, the total elongation of the composite aluminum alloy plate is 5-25%, the tensile strength of the middle layer is 300-550 Mpa, and the tensile strength of the outer layer is 100-150 Mpa.
The composite aluminum alloy plate serving as the electronic product shell and the manufacturing method thereof are provided, the first aluminum alloy plate is a 7075 aluminum alloy plate, the second aluminum alloy plate is a 5052 aluminum alloy plate, the thickness of the composite aluminum alloy plate is 0.1-6.0 mm, the total elongation of the composite aluminum alloy plate is 5-25%, the tensile strength of the middle layer is 300-550 Mpa, and the tensile strength of the outer layer is 100-150 Mpa.
The application is an embodiment of a composite aluminum alloy plate for an electronic product shell and a manufacturing method thereof, wherein the T thermal refining process is T6 thermal refining, and the T6 thermal refining sequentially comprises the following steps: and carrying out solutionizing treatment on the composite aluminum alloy plate rolled by the hot rolling process and the cold rolling process at 480-520 ℃, and carrying out aging treatment on the composite aluminum alloy plate subjected to the solutionizing treatment at 110-130 ℃ for 24 hours.
The composite aluminum alloy plate serving as the shell of the electronic product and the embodiment of the manufacturing method thereof are characterized in that the thickness ratio of the middle layer to the outer layer is (1-2): 1.
one aspect of the present application provides a method for manufacturing an electronic product housing, including the following steps:
preparing materials, namely preparing a first aluminum alloy plate and a second aluminum alloy plate, wherein the first aluminum alloy plate is made of an aluminum alloy material containing any one of 6 XXX-8 XXX series aluminum alloys, and the second aluminum alloy plate is made of an aluminum alloy material containing any one of 1 XXX-5 XXX series aluminum alloys;
hot rolling, namely overlapping and compounding a first aluminum alloy plate and a second aluminum alloy plate into a composite aluminum alloy plate with a three-layer structure by a hot rolling process, wherein the first aluminum alloy plate is used as a middle layer of the composite aluminum alloy plate, and the second aluminum alloy plate is used as an outer layer of the composite aluminum alloy plate;
and a cold rolling step, namely rolling the composite aluminum alloy plate from thick to thin to the required thickness by a cold rolling process, wherein the thickness ratio of the middle layer to the outer layer is (1-9): 1;
a press forming and heat treatment stabilizing step, comprising: forming the composite aluminum alloy plate subjected to the cold rolling step into an electronic product shell by a T quenching and tempering process and a stamping process; and
and an anodic oxidation treatment step of forming an anodic aluminum oxide layer on the outer side surface of the second aluminum alloy sheet as the outer layer of the composite aluminum alloy sheet by an anodic oxidation treatment process.
In an embodiment of the method for manufacturing an electronic product housing, the T thermal refining process in the step of stamping and stabilizing heat treatment is T6 thermal refining, and the T6 thermal refining sequentially includes: and carrying out solutionizing treatment on the composite aluminum alloy plate rolled by the hot rolling process and the cold rolling process at 480-520 ℃, and carrying out aging treatment on the composite aluminum alloy plate subjected to the solutionizing treatment at 110-130 ℃ for 24 hours.
In one embodiment of the method for manufacturing an electronic product housing, the step of stamping and stabilizing heat treatment comprises: the composite aluminum alloy plate after the cold rolling step is maintained in a solutionizing state of a T6 quenching and tempering process, is firstly formed into an electronic product shell through a stamping process, and then is subjected to aging treatment to be in a stable state.
In one embodiment of the method for manufacturing an electronic product housing, the step of stamping and stabilizing heat treatment comprises: the composite aluminum alloy plate after the cold rolling step is firstly subjected to T6 thermal refining treatment to be in a stable state, and then is formed into the electronic product shell through a stamping process.
The method has the beneficial effects that different series of aluminum alloy materials are selected as the first aluminum alloy plate and the second aluminum alloy plate, the first aluminum alloy plate and the second aluminum alloy plate are compounded into the composite aluminum alloy plate with the three-layer structure through a hot rolling process, the composite aluminum alloy plate is rolled to the required thickness through a cold rolling process, and the composite aluminum alloy plate with the three-layer structure has the properties of internal softness and external hardness through a T quenching and tempering process, so that the composite aluminum alloy plate with the excellent tensile strength and elongation are obtained; the first aluminum alloy plate is used as the middle layer of the composite aluminum alloy plate to provide mechanical strength required by the shell of the electronic product, and the second aluminum alloy plate is used as the outer layer of the composite aluminum alloy plate and is suitable for anodic oxidation and dyeing treatment to meet the requirement of beautifying the appearance of the shell of the electronic product.
On the other hand, the composite aluminum alloy plate is used for manufacturing the shell of the electronic product, so that the problem that the shell made of an aluminum alloy material is difficult to have good stamping forming performance and dyeing treatment is solved, the quality of the right-angle side formed by the aluminum alloy shell through a stamping process is improved, the problem that the right-angle side is not easy to form by the high-strength aluminum alloy shell through the stamping process is solved, and the sufficient bending-resistant mechanical strength is maintained; on the other hand, the composite aluminum alloy plate as the electronic product shell is suitable for anodic oxidation treatment in appearance, can obtain excellent appearance quality and be easily dyed by anodic oxidation treatment, has the surface hardness reaching 6XXX series aluminum alloy hardness, and has the characteristics of excellent chemical stability, insulating property, high temperature resistance, wear resistance and the like.
Other features and embodiments of the present application will be described in detail below with reference to the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic cross-sectional view of a composite aluminum alloy plate used as a housing of an electronic product;
FIG. 2 is a schematic flow chart showing the steps of the method for manufacturing a composite aluminum alloy sheet for an electronic product housing according to the present invention;
fig. 3 is a schematic flow chart illustrating steps of a method for manufacturing an electronic product housing according to the present application.
Description of the symbols
10 first aluminum alloy plate 20 second aluminum alloy plate
21 anodic aluminum oxide layer P composite aluminum alloy plate
S1-1 preparation step S1-2 hot rolling step
S1-3 Cold Rolling step S1-4T thermal refining step
S1-5 anodizing step S2-1 Material preparation step
S2-2 Hot Rolling step S2-3 Cold Rolling step
S2-4 stamping forming and heat treatment stabilizing step
S2-5 anodizing treatment step
Detailed Description
The positional relationship described in the following embodiments includes: the top, bottom, left and right, unless otherwise indicated, are based on the orientation of the elements in the drawings.
Please refer to fig. 1, which is a schematic cross-sectional view of a composite aluminum alloy plate used as a housing of an electronic product. The structure of this application as compound aluminum alloy plate of electronic product shell includes: the first aluminum alloy plate 10 and the second aluminum alloy plate 20 are mutually overlapped and compounded together, the first aluminum alloy plate 10 and the second aluminum alloy plate 20 are made of aluminum alloy materials of different series, the aluminum alloy material selected for the first aluminum alloy plate 10 comprises any one of 6 XXX-8 XXX series aluminum alloys, the aluminum alloy material selected for the second aluminum alloy plate 20 comprises any one of 1 XXX-5 XXX series aluminum alloys, the first aluminum alloy plate 10 and the second aluminum alloy plate 20 are mutually overlapped and compounded into a composite aluminum alloy plate P with a three-layer structure through a hot rolling process, the composite aluminum alloy plate P is then rolled to the required thickness from thick to thin through a cold rolling process, and then is subjected to a T tempering process to a stable state, the first aluminum alloy plate 10 is used as a middle layer of the composite aluminum alloy plate P, and the second aluminum alloy plate 20 is used as an outer layer of the composite aluminum alloy plate P, the thickness ratio of the middle layer to the outer layer is (1-9): 1, the outer side surface of the second aluminum alloy sheet 20 as the outer layer of the composite aluminum alloy sheet P has an anodized aluminum layer 21 formed by an anodizing process.
Referring to fig. 2, a schematic flow chart of steps of an embodiment of a method for manufacturing a composite aluminum alloy sheet for an electronic product housing according to the present application includes the following steps:
s1-1, a material preparing step, wherein a first aluminum alloy plate 10 and a second aluminum alloy plate 20 are prepared, the first aluminum alloy plate 10 is made of any one of 6 XXX-8 XXX series aluminum alloys, and the second aluminum alloy plate 20 is made of any one of 1 XXX-5 XXX series aluminum alloys;
s1-2, hot rolling, namely overlapping and compounding the first aluminum alloy plate 10 and the second aluminum alloy plate 20 into a composite aluminum alloy plate P with a three-layer structure through a hot rolling process, wherein the first aluminum alloy plate 10 serves as a middle layer of the composite aluminum alloy plate P, and the second aluminum alloy plate 20 serves as an outer layer of the composite aluminum alloy plate P;
s1-3, a cold rolling step, namely, rolling the composite aluminum alloy plate P from thick to thin to the required thickness through a cold rolling process, wherein the thickness ratio of the middle layer to the outer layer is (1-9): 1;
s1-4.T thermal refining step, comprising: the composite aluminum alloy plate P manufactured by a hot rolling process and a cold rolling process is subjected to a T hardening and tempering treatment process to be in a stable state; and
and S1-5, an anodizing process of forming an anodized aluminum layer 21 on an outer surface of the second aluminum alloy sheet 20 as an outer layer of the composite aluminum alloy sheet P by an anodizing process.
The hardness of 1 XXX-5 XXX series aluminum alloy is relatively smaller than 6 XXX-8 XXX series aluminum alloy, different series aluminum alloy materials are selected as a first aluminum alloy plate 10 and a second aluminum alloy plate 20, the first aluminum alloy plate 10 and the second aluminum alloy plate 20 are compounded into a composite aluminum alloy plate P with a three-layer structure through a hot rolling process, the composite aluminum alloy plate P is rolled to the required thickness through a cold rolling process, the composite aluminum alloy plate P can finish primary hardening through hot rolling and cold rolling processes, and the mechanical property of the composite aluminum alloy plate P with the three-layer structure reaches a stable state through a T quenching and tempering process, so that the composite aluminum alloy plate P has the properties of soft inside and hard outside, and excellent tensile strength and elongation are obtained. As a preferred embodiment of the present application, the thickness of the composite aluminum alloy plate P is 0.1-6.0 mm, the total elongation of the composite aluminum alloy plate P is 5-25%, the tensile strength of the middle layer is 300-550 MPa, and the tensile strength of the outer layer is 100-150 MPa. The first aluminum alloy plate 10 is used as a middle layer of the composite aluminum alloy plate P, any one of 6 XXX-8 XXX series aluminum alloys can provide mechanical strength required by the shell of an electronic product, the second aluminum alloy plate 20 is used as an outer layer of the composite aluminum alloy plate P, and any one of 1 XXX-5 XXX series aluminum alloys is selected as the second aluminum alloy plate 20, so that the composite aluminum alloy plate P is suitable for anodic oxidation and dyeing treatment to meet the requirement of beautifying the appearance of the shell of the electronic product.
As a further preferred embodiment of the present application, the first aluminum alloy plate 10 is a 7075 aluminum alloy plate, the second aluminum alloy plate 20 is a 5052 aluminum alloy plate, the 5052 aluminum alloy plate can obtain excellent appearance quality through anodic oxidation treatment and is easy to dye, the surface hardness can reach 6XXX series aluminum alloy hardness, and the aluminum alloy plate has the characteristics of excellent chemical stability, insulation, high temperature resistance, wear resistance and the like. The T quenching and tempering process is preferably T6 quenching and tempering, 7075 aluminum alloy plate is selected as the first aluminum alloy plate 10, and the T6 quenching and tempering sequentially comprises the following steps: the composite aluminum alloy plate P rolled by the hot rolling process and the cold rolling process is subjected to solutionizing treatment at 480-520 ℃, and the composite aluminum alloy plate P subjected to the solutionizing treatment is subjected to aging treatment at 110-130 ℃ for 24 hours.
As a preferred embodiment of the composite aluminum alloy plate of the electronic product shell and the manufacturing method thereof, the thickness ratio of the middle layer to the outer layer is (1-2): 1, the preferred thickness ratio of the middle layer to the outer layer is 1:1: 1. Use this kind of compound aluminum alloy plate P preparation electronic product shell, solved the tradition and used single aluminum alloy material preparation shell to be difficult to have good stamping forming performance and the problem of dyeing treatment concurrently, this application compound aluminum alloy plate P possesses soft outer hard performance in and possesses good stamping forming performance, has promoted the quality that aluminum alloy shell passes through the punching press technology shaping right angle limit, solves the difficult problem that forms the right angle limit through the punching press technology of high strength aluminum alloy shell. The 7075 aluminum alloy sheet was selected as the first aluminum alloy sheet 10 which is the intermediate layer of the composite aluminum alloy sheet P, and sufficient bending resistance and mechanical strength were provided.
Please refer to fig. 3, which is a schematic flowchart illustrating a process of an embodiment of a method for manufacturing an electronic product housing according to the present application, including the following steps:
s2-1, a material preparing step, wherein a first aluminum alloy plate 10 and a second aluminum alloy plate 20 are prepared, the first aluminum alloy plate 10 is made of any one of 6 XXX-8 XXX series aluminum alloys, and the second aluminum alloy plate 20 is made of any one of 1 XXX-5 XXX series aluminum alloys;
s2-2, hot rolling, namely overlapping and compounding the first aluminum alloy plate 10 and the second aluminum alloy plate 20 into a composite aluminum alloy plate P with a three-layer structure through a hot rolling process, wherein the first aluminum alloy plate 10 serves as a middle layer of the composite aluminum alloy plate P, and the second aluminum alloy plate 20 serves as an outer layer of the composite aluminum alloy plate P;
s2-3, a cold rolling step, namely, rolling the composite aluminum alloy plate P from thick to thin to the required thickness through a cold rolling process, wherein the thickness ratio of the middle layer to the outer layer is (1-9): 1;
s2-4, a stamping forming and heat treatment stabilizing step, comprising: forming the composite aluminum alloy plate P subjected to the cold rolling step into an electronic product shell through a T quenching and tempering process and a stamping process; and
and S2-5, an anodizing process of forming an anodized aluminum layer 21 on an outer surface of the second aluminum alloy sheet 20 as an outer layer of the composite aluminum alloy sheet P by an anodizing process.
In the preferred embodiment of the manufacturing method of the electronic product housing, the thickness of the composite aluminum alloy plate P is 0.1-6.0 mm, the total elongation of the composite aluminum alloy plate P is 5-25%, the tensile strength of the middle layer is 300-550 Mpa, and the tensile strength of the outer layer is 100-150 Mpa. Wherein the first aluminum alloy sheet 10 is 7075 aluminum alloy sheet and the second aluminum alloy sheet 20 is 5052 aluminum alloy sheet.
The preferred embodiment of the T-temper process of the stamping forming and heat treatment stabilizing step (S2-4) is T6 temper, wherein 7075 aluminum alloy plate is selected as the first aluminum alloy plate 10, and the T6 temper sequentially comprises: the composite aluminum alloy sheet P rolled by the hot rolling process and the cold rolling process is subjected to solutionizing treatment at 480 to 520 ℃, and the composite aluminum alloy sheet P subjected to the solutionizing treatment is subjected to aging treatment at 110 to 130 ℃ for 24 hours, so that the mechanical properties of the intermediate layer of the composite aluminum alloy sheet P after the aging treatment are stabilized, in other words, precipitation hardening (precipitation hardening) of the 7075 aluminum alloy sheet serving as the intermediate layer of the composite aluminum alloy sheet P can be stabilized.
As an embodiment of the method for manufacturing the electronic product housing of the present application, the stamping forming and heat treatment stabilizing step (S2-4) comprises: the composite aluminum alloy plate P after the cold rolling step is maintained in a solutionizing state of a T6 quenching and tempering process, is firstly formed into an electronic product shell through a stamping process, and then is subjected to aging treatment to be in a stable state. In other words, the first aluminum alloy sheet 10 in the intermediate layer of the composite aluminum alloy sheet P is formed into the electronic product housing by a stamping process, and then is aged to a stable state, so that the electronic product housing with stable mechanical properties can be obtained.
As an embodiment of the method for manufacturing the electronic product housing of the present application, the stamping forming and heat treatment stabilizing step (S2-4) comprises: the composite aluminum alloy plate P after the cold rolling step is firstly subjected to T6 thermal refining treatment to be in a stable state, and then is formed into an electronic product shell through a stamping process. In other words, the first aluminum alloy sheet 10 in the intermediate layer of the composite aluminum alloy sheet P is first aged to a stable state and then formed into the electronic product housing by a press process, so that the electronic product housing having stable mechanical properties can be obtained.
The above-described embodiments and/or implementations are only for illustrating the preferred embodiments and/or implementations of the technology of the present application, and are not intended to limit the implementations of the technology of the present application in any way, and those skilled in the art can make modifications or changes to other equivalent embodiments without departing from the scope of the technology disclosed in the present application, but should be construed as technology or implementations substantially the same as the present application.
Claims (16)
1. A composite aluminum alloy sheet for use as an outer case of an electronic product, comprising: the first aluminum alloy plate and the second aluminum alloy plate are mutually overlapped and compounded together, the first aluminum alloy plate and the second aluminum alloy plate are made of aluminum alloy materials of different series, the aluminum alloy material selected by the first aluminum alloy plate comprises any one of 6 XXX-8 XXX series aluminum alloys, the aluminum alloy material selected by the second aluminum alloy plate comprises any one of 1 XXX-5 XXX series aluminum alloys, the first aluminum alloy plate and the second aluminum alloy plate are mutually overlapped and compounded into the composite aluminum alloy plate with a three-layer structure through a hot rolling process, the composite aluminum alloy plate is then rolled to the required thickness from thick to thin through a cold rolling process and then is subjected to a T hardening and tempering process to a stable state, the first aluminum alloy plate is used as a middle layer of the composite aluminum alloy plate, and the second aluminum alloy plate is used as an outer layer of the composite aluminum alloy plate, the thickness ratio of the middle layer to the outer layer is (1-9): the outer surface of the second aluminum alloy sheet as the outer layer of the composite aluminum alloy sheet has an anodized aluminum layer formed by an anodizing process.
2. The aluminum alloy composite sheet as claimed in claim 1, wherein the aluminum alloy composite sheet has a thickness of 0.1-6.0 mm, a total elongation of 5-25%, a tensile strength of 300-550 Mpa in the middle layer, and a tensile strength of 100-150 Mpa in the outer layer.
3. The composite aluminum alloy sheet as claimed in claim 1, wherein the first aluminum alloy sheet is 7075 aluminum alloy sheet, the second aluminum alloy sheet is 5052 aluminum alloy sheet, the thickness of the composite aluminum alloy sheet is 0.1-6.0 mm, the total elongation of the composite aluminum alloy sheet is 5-25%, the tensile strength of the middle layer is 300-550 Mpa, and the tensile strength of the outer layer is 100-150 Mpa.
4. The aluminum alloy clad laminate as claimed in claim 3, wherein the T-temper process is a T6 temper, the T6 temper comprising in order: the composite aluminum alloy plate rolled by the hot rolling process and the cold rolling process is subjected to solutionizing treatment at 480-520 ℃, and the composite aluminum alloy plate subjected to the solutionizing treatment is subjected to aging treatment at 110-130 ℃ for 24 hours.
5. The composite aluminum alloy sheet as an electronic product casing as claimed in claim 2, wherein the thickness ratio of the intermediate layer to the outer layer is (1-2): 1.
6. a manufacturing method of a composite aluminum alloy plate used as an electronic product shell is characterized by comprising the following steps:
preparing materials, namely preparing a first aluminum alloy plate and a second aluminum alloy plate, wherein the first aluminum alloy plate is made of an aluminum alloy material containing any one of 6 XXX-8 XXX series aluminum alloys, and the second aluminum alloy plate is made of an aluminum alloy material containing any one of 1 XXX-5 XXX series aluminum alloys;
hot rolling, namely overlapping and compounding the first aluminum alloy plate and the second aluminum alloy plate into a composite aluminum alloy plate with a three-layer structure by a hot rolling process, wherein the first aluminum alloy plate is used as a middle layer of the composite aluminum alloy plate, and the second aluminum alloy plate is used as an outer layer of the composite aluminum alloy plate;
and a cold rolling step, namely rolling the composite aluminum alloy plate from thick to thin to the required thickness by a cold rolling process, wherein the thickness ratio of the middle layer to the outer layer is (1-9): 1;
t thermal refining step, comprising: the composite aluminum alloy plate manufactured by the hot rolling process and the cold rolling process is subjected to a T quenching and tempering treatment process to be in a stable state; and
and an anodic oxidation treatment step of forming an anodic aluminum oxide layer on the outer side surface of the second aluminum alloy sheet as the outer layer of the composite aluminum alloy sheet by an anodic oxidation treatment process.
7. The method of claim 6, wherein the composite aluminum alloy sheet has a thickness of 0.1-6.0 mm, a total elongation of 5-25%, a tensile strength of 300-550 MPa in the middle layer, and a tensile strength of 100-150 MPa in the outer layer.
8. The method of claim 6, wherein the first aluminum alloy plate is 7075 aluminum alloy plate, the second aluminum alloy plate is 5052 aluminum alloy plate, the thickness of the composite aluminum alloy plate is 0.1-6.0 mm, the total elongation of the composite aluminum alloy plate is 5-25%, the tensile strength of the middle layer is 300-550 MPa, and the tensile strength of the outer layer is 100-150 MPa.
9. The method of claim 8, wherein the T tempering process is T6 tempering, and the T6 tempering sequentially comprises: the composite aluminum alloy plate rolled by the hot rolling process and the cold rolling process is subjected to solutionizing treatment at 480-520 ℃, and the composite aluminum alloy plate subjected to the solutionizing treatment is subjected to aging treatment at 110-130 ℃ for 24 hours.
10. The method of manufacturing a composite aluminum alloy sheet for an electronic product casing as claimed in claim 7, wherein a thickness ratio of the intermediate layer to the outer layer is (1-2): 1.
11. a manufacturing method of an electronic product shell is characterized by comprising the following steps:
preparing materials, namely preparing a first aluminum alloy plate and a second aluminum alloy plate, wherein the first aluminum alloy plate is made of an aluminum alloy material containing any one of 6 XXX-8 XXX series aluminum alloys, and the second aluminum alloy plate is made of an aluminum alloy material containing any one of 1 XXX-5 XXX series aluminum alloys;
hot rolling, namely overlapping and compounding the first aluminum alloy plate and the second aluminum alloy plate into a composite aluminum alloy plate with a three-layer structure by a hot rolling process, wherein the first aluminum alloy plate is used as a middle layer of the composite aluminum alloy plate, and the second aluminum alloy plate is used as an outer layer of the composite aluminum alloy plate;
and a cold rolling step, namely rolling the composite aluminum alloy plate from thick to thin to the required thickness by a cold rolling process, wherein the thickness ratio of the middle layer to the outer layer is (1-9): 1;
a press forming and heat treatment stabilizing step, comprising: forming the composite aluminum alloy plate subjected to the cold rolling step into an electronic product shell by a T quenching and tempering process and a stamping process; and
and an anodic oxidation treatment step of forming an anodic aluminum oxide layer on the outer side surface of the second aluminum alloy sheet as the outer layer of the composite aluminum alloy sheet by an anodic oxidation treatment process.
12. The method of claim 11, wherein the composite aluminum alloy plate has a thickness of 0.1-6.0 mm, a total elongation of 5-25%, the middle layer has a tensile strength of 300-550 Mpa, and the outer layer has a tensile strength of 100-150 Mpa.
13. The method of claim 11, wherein the first aluminum alloy plate is 7075 aluminum alloy plate, the second aluminum alloy plate is 5052 aluminum alloy plate, the composite aluminum alloy plate has a thickness of 0.1-6.0 mm, the composite aluminum alloy plate has a total elongation of 5-25%, the middle layer has a tensile strength of 300-550 Mpa, and the outer layer has a tensile strength of 100-150 Mpa.
14. The method of claim 13, wherein the T-temper is a T6 temper, the T6 temper comprising in sequence: the composite aluminum alloy plate rolled by the hot rolling process and the cold rolling process is subjected to solutionizing treatment at 480-520 ℃, and the composite aluminum alloy plate subjected to the solutionizing treatment is subjected to aging treatment at 110-130 ℃ for 24 hours.
15. The method of claim 14, wherein the stamping and thermal processing steps comprise: the composite aluminum alloy plate after the cold rolling step is maintained in a solutionizing state of the T6 quenching and tempering process, is firstly formed into an electronic product shell through the stamping process, and then is subjected to aging treatment to be in a stable state.
16. The method of claim 14, wherein the stamping and thermal processing steps comprise: the composite aluminum alloy plate after the cold rolling step is firstly subjected to the T6 thermal refining process to be in a stable state, and then is formed into the electronic product shell through the stamping process.
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| CN108396209A (en) * | 2018-04-17 | 2018-08-14 | 广西南南铝加工有限公司 | A kind of preparation method of 6xxx/7xxx Al alloy composites |
| CN108909138A (en) * | 2018-06-22 | 2018-11-30 | 广西南南铝加工有限公司 | A kind of preparation method of 1xxx/7xxx Al alloy composite |
| CN110756581A (en) * | 2019-10-24 | 2020-02-07 | 中铝瑞闽股份有限公司 | Hot rolling process of high-strength aluminum alloy for anodic oxidation |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108396209A (en) * | 2018-04-17 | 2018-08-14 | 广西南南铝加工有限公司 | A kind of preparation method of 6xxx/7xxx Al alloy composites |
| CN108909138A (en) * | 2018-06-22 | 2018-11-30 | 广西南南铝加工有限公司 | A kind of preparation method of 1xxx/7xxx Al alloy composite |
| CN110756581A (en) * | 2019-10-24 | 2020-02-07 | 中铝瑞闽股份有限公司 | Hot rolling process of high-strength aluminum alloy for anodic oxidation |
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