Preparation method and application of multi-layer metal composite board

Abstract

The invention relates to the technical field of preparation of multi-layer metal composite boards, in particular to a preparation method and application of a multi-layer metal composite board, which comprises the following steps: S1, material selection and edge cutting: selecting two layers of food-grade stainless steel boards and a layer of titanium board or aluminum board, cutting according to the required size after selection, and knurling one by one after cutting; s2, surface treatment; s3, modification treatment is conducted, specifically, the cleaned stainless steel plate is subjected to surface modification treatment, the components and the antibacterial effect of the surface of the stainless steel plate are changed, the surface modified stainless steel plate is obtained, and the surface modification treatment is surface nanocrystallization treatment; s4, stacking and assembling are conducted; s5, hot rolling compounding; s6, diffusion annealing; and S7, precise cold rolling. The antibacterial performance and the self-cleaning capability can be improved, and the uniformity and the stability of the material are improved; and high-precision forming and performance adjustment can be conducted on the material, the advantages of the material can be fully played, and a high-quality metal composite plate product is obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multilayer metal composite plate preparation, in particular to a preparation method of multilayer metal composite plate and application thereof. BACKGROUND

[0002] Metal composite plate is a kind of plate combined by two or more different metals through a specific process. The design purpose is to maintain the excellent performance of the original metal material (such as corrosion resistance, mechanical strength, etc.) while realizing resource saving and cost reduction.

[0003] However, the existing metal composite plate has poor antibacterial performance and self-cleaning ability during preparation, which will result in poor antibacterial effect and less than ideal self-cleaning ability when the metal composite plate is made into cooking utensils. Moreover, the existing metal composite plate will result in poor material uniformity and stability during preparation, so that the metal composite plate product cannot achieve the expected effect. SUMMARY

[0004] The present application aims to provide a preparation method of multilayer metal composite plate and application thereof to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a preparation method of multilayer metal composite plate and application thereof, comprising the following steps:

[0006] S1: selecting and cutting edges, selecting two layers of food-grade stainless steel plate and one layer of titanium plate or aluminum plate, and cutting according to the required size after selection, and then rolling each one after cutting;

[0007] S2: surface treatment, cleaning the stainless steel plate in S1 to remove the metal surface oxidation layer and oil stains, and then activating the aluminum plate;

[0008] S3: modification treatment, surface modification treatment is performed on the cleaned stainless steel plate to change the composition and antibacterial effect of the surface of the stainless steel plate, and a surface-modified stainless steel plate is obtained, wherein the surface modification treatment is surface nanocrystallization treatment;

[0009] S4: laminating and assembling, vacuum packaging the modified stainless steel plate and the titanium plate or aluminum plate after treatment; and then edge welding the vacuum packaged modified stainless steel plate and the titanium plate or aluminum plate;

[0010] S5: hot rolling and compounding, heating the modified stainless steel plate and the titanium plate or aluminum plate after welding in S4, and then rolling after heating;

[0011] S6: diffusion annealing, annealing the modified stainless steel plate and titanium plate or aluminum plate after rolling to improve or eliminate the component inhomogeneity temperature formed during rolling;

[0012] S7: precision cold rolling, annealing the modified stainless steel plate and titanium plate or aluminum plate after S6 to improve the flatness and surface finish of the plate, and stress relief annealing after rolling to obtain a multilayer metal composite plate.

[0013] Preferably, in S1, the food-grade stainless steel is one or any combination of 304 stainless steel, 316L stainless steel and 440 stainless steel; the thickness of the food-grade stainless steel is 0.2-0.5mm.

[0014] Preferably, in S1, the titanium plate is TA1 or any one of TA2 titanium plate, and the thickness of the aluminum plate or titanium plate is 1.5-3mm.

[0015] Preferably, in S2, the cleaning of the stainless steel plate uses alkaline degreasing agent or pickling; the aluminum layer of the activation treatment is anodized or chemically plated with nickel, and the thickness of the nickel plating is 2-5μm to prevent the formation of brittle phase at the aluminum-stainless steel interface at high temperature.

[0016] Preferably, in S3, the specific method of surface nanocrystallization treatment is to modify the surface of the stainless steel with nanoparticles to form a nanostructure on the surface of the stainless steel to improve the antibacterial performance and self-cleaning ability.

[0017] Preferably, in S4, the vacuum packaging is to stack the cleaned modified stainless steel plate and titanium plate or aluminum plate into a vacuum furnace and evacuate to ≤10 -3 Pa to avoid oxidation inclusions.

[0018] Preferably, in S4, the edge welding is to use electron beam or laser spot welding to fix the relative position between the layers to prevent misalignment during subsequent rolling.

[0019] Preferably, in S5, the hot rolling composite uses gradient temperature control, the stainless steel layer is controlled at 800-950℃, and the aluminum layer is controlled at ≤400℃; in S6, the annealing temperature is 550-650℃, and the annealing time is 1-3 hours.

[0020] Preferably, in S7, the rolling pressure of the precision cold rolling is 300-600MPa; the deformation amount is achieved by multi-pass rolling: 50-70%; and the rolling speed is 0.5-2m / s.

[0021] The application also provides an application of the multilayer metal composite plate, which is used in the preparation of cooking utensils.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention obtains a surface-modified stainless steel plate by modifying the surface of the stainless steel plate to change the surface composition and antibacterial effect of the stainless steel plate. Specifically, the surface modification is carried out through surface nano-processing, and the specific method of surface nano-processing is to modify the stainless steel surface with nanoparticles to form a nanostructure on the stainless steel surface. Compared with the existing technology, this can improve the antibacterial performance and self-cleaning ability.

[0024] The present invention uses a combination of hot rolling composite, diffusion annealing and precision cold rolling. Among them, the high temperature and pressure of hot rolling composite are used to achieve metal bonding, which can process thicker materials and different types of metal combinations. Diffusion annealing can improve material defects after hot rolling and improve the uniformity and stability of the material. Precision cold rolling can perform high-precision molding and performance adjustment on the material, which can give full play to its advantages and obtain high-quality metal composite plate products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Flowchart of the present invention. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] The present application provides a preparation method of a multi-layer metal composite plate and an application structure thereof, as shown in Figure 1 The preparation method comprises the following steps:

[0032] S1: selecting and cutting edges, selecting two layers of food-grade stainless steel plate and a layer of titanium plate or aluminum plate, and selecting and cutting according to the required size after selection, and then rolling each one after cutting.

[0033] Specifically, in S1, the food-grade stainless steel is one or any combination of 304 stainless steel, 316L stainless steel and 440 stainless steel; the thickness of the food-grade stainless steel is 0.2-0.5mm; in S1, the titanium plate is TA1 or any one of TA2 titanium plate, and the thickness of the aluminum plate or titanium plate is 1.5-3mm.

[0034] S2: surface treatment, cleaning the stainless steel plate in S1 to remove the metal surface oxide layer and oil stains, and then activating the aluminum plate, wherein the cleaning of the stainless steel plate adopts alkaline degreasing agent or pickling; the activated aluminum layer is anodized or chemically plated with nickel, and the thickness of the nickel plating is 2-5μm, so as to prevent the generation of brittle phase at the aluminum-stainless steel interface under high temperature.

[0035] S3: modification treatment, surface modification treatment is performed on the cleaned stainless steel plate to change the composition and antibacterial effect of the surface of the stainless steel plate, and a surface-modified stainless steel plate is obtained, wherein the surface modification treatment is surface nanocrystallization treatment.

[0036] Further, the specific method of surface nanocrystallization treatment is to modify the surface of stainless steel by nanoparticles to form a nanostructure on the surface of the stainless steel to improve the antibacterial performance and self-cleaning ability, and the nanoparticle modification can be silica nanoparticles.

[0037] S4: laminating the group blank, vacuum packaging the modified stainless steel plate and the titanium plate or the aluminum plate after treatment; then edge welding the vacuum packaged modified stainless steel plate and the titanium plate or the aluminum plate; the vacuum packaging is to place the cleaned modified stainless steel plate and the titanium plate or the aluminum plate into a vacuum furnace and draw to ≤10-3Pa to avoid oxidation inclusion; the edge welding is to use electron beam or laser spot welding to fix the relative position between layers to prevent dislocation during subsequent rolling.

[0038] S5: hot rolling compounding, heating the modified stainless steel plate and the titanium plate or the aluminum plate after welding in S4, and rolling after heating; wherein the hot rolling compounding adopts gradient temperature control, the stainless steel layer is controlled at 800-950℃; and the aluminum layer is controlled at ≤400℃.

[0039] S6: diffusion annealing, annealing the modified stainless steel plate and the titanium plate or the aluminum plate after rolling to improve or eliminate the component inhomogeneity temperature formed in the rolling process; wherein the annealing temperature is 550-650℃, and the annealing time is 1-3 hours.

[0040] S7: precision cold rolling, cold rolling the modified stainless steel plate and the titanium plate or the aluminum plate after annealing in S6 to improve the flatness and surface finish of the plate; the rolling pressure of the precision cold rolling is 300-600MPa; the deformation amount is achieved by multi-pass rolling: 50-70%; and the rolling speed is 0.5-2m / s; and after rolling, stress relief annealing is performed, thereby obtaining a multi-layer metal composite plate.

[0041] The application also provides an application of the multi-layer metal composite plate to the preparation of a cooking utensil.

[0042] Method steps: first, select two layers of food-grade stainless steel plates (one or any two combinations of 304 stainless steel, 316L stainless steel and 440 stainless steel) with a thickness of 0.2-0.5mm and one layer of titanium plate or aluminum plate with a thickness of 1.5-3mm, select and cut according to the required size after selection, and then roll one by one after cutting.

[0043] In the specific rolling, first, select the pattern type according to the needs, select straight grain wheel, mesh wheel or customized wheel; second, select mechanical rolling or cold stamping or numerical control machining for rolling operation according to the needs; then, polish and remove the burrs after rolling to ensure comfortable feel; finally, surface treatment: electroplating, sandblasting, oxidation or spraying to enhance corrosion resistance and aesthetics.

[0044] Secondly, the stainless steel plate is cleaned to remove the metal surface oxide layer and oil stains, and the aluminum plate is activated, wherein the cleaning of the stainless steel plate adopts alkaline degreasing agent or pickling; the aluminum layer is activated by anodic oxidation or chemical nickel plating, and the thickness of the nickel plating is 2-5 μm to prevent the generation of brittle phase at the aluminum-stainless steel interface under high temperature.

[0045] Thirdly, the cleaned stainless steel plate is subjected to surface modification treatment to change the composition and antibacterial effect of the surface of the stainless steel plate, and a surface-modified stainless steel plate is obtained, wherein the surface modification treatment is surface nanocrystallization treatment; the specific method of the surface nanocrystallization treatment is to modify the surface of the stainless steel by nanoparticles to form a nanostructure on the surface of the stainless steel to improve the antibacterial performance and self-cleaning ability.

[0046] Subsequently, the treated modified stainless steel plate and the titanium plate or aluminum plate are vacuum packaged; and then the vacuum packaged modified stainless steel plate and the titanium plate or aluminum plate are edge welded, wherein the vacuum packaging is to stack the cleaned modified stainless steel plate and the titanium plate or aluminum plate in a vacuum furnace and draw to ≤10-3 Pa to avoid oxidation inclusions; and the edge welding is to fix the relative position between the layers by electron beam or laser spot welding to prevent misplacement during subsequent rolling.

[0047] After that, the welded modified stainless steel plate and the titanium plate or aluminum plate are heated and then rolled, and gradient temperature control is adopted in the rolling, with the stainless steel layer controlled at 800-950 ℃ and the aluminum layer controlled at ≤400 ℃; then, the rolled modified stainless steel plate and the titanium plate or aluminum plate are annealed at an annealing temperature of 550-650 ℃ and for an annealing time of 1-3 hours to improve or eliminate the composition inhomogeneity temperature formed in the rolling process.

[0048] Finally, the annealed modified stainless steel plate and the titanium plate or aluminum plate are cold-rolled to improve the flatness and surface finish of the plate, wherein the rolling pressure of the precision cold rolling is 300-600 MPa; the deformation amount is achieved by multi-pass rolling at 50-70%; and the rolling speed is 0.5-2 m / s, and then stress relief annealing is performed after rolling to obtain a multilayer metal composite plate.

[0049] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A method for preparing a multi-layer metal composite plate, characterized in that: The steps include: S1: Material selection and trimming: select two layers of food-grade stainless steel plates and one layer of titanium plate or aluminum plate, cut them to the required size, and then knurl them one by one; S2: Surface treatment: clean the stainless steel plate in S1, remove the oxide layer and oil stains on the metal surface, and then activate the aluminum plate; S3: Modification treatment, performing surface modification treatment on the cleaned stainless steel plate to change the composition and antibacterial effect of the surface of the stainless steel plate to obtain a surface-modified stainless steel plate, wherein the surface modification treatment is surface nano-processing; S4: Laminating and assembling the blanks, vacuum-sealing the treated modified stainless steel plates and titanium plates or aluminum plates; and then edge-welding the vacuum-sealed modified stainless steel plates and titanium plates or aluminum plates; S5: hot rolling composite, heating the modified stainless steel plate and titanium plate or aluminum plate welded in S4, and rolling them after heating; S6: Diffusion annealing, annealing the modified stainless steel plate and titanium plate or aluminum plate after rolling to improve or eliminate the temperature of the composition unevenness formed during the rolling process; S7: Precision cold rolling, cold rolling the modified stainless steel plate annealed in S6 and the titanium plate or aluminum plate to improve the flatness and surface finish of the plate, and perform stress relief annealing after rolling to obtain a multi-layer metal composite plate.

2. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S1, the food-grade stainless steel is one or a combination of any two of 304 stainless steel, 316L stainless steel and 440 stainless steel; and the thickness of the food-grade stainless steel is 0.2-0.5 mm.

3. The method for preparing a multi-layer metal composite plate according to claim 5, wherein: In S1, the titanium plate is either TA1 or TA2 titanium plate, and the thickness of the aluminum plate or titanium plate is 1.5-3 mm.

4. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S2, the stainless steel plate is cleaned by alkaline degreasing agent or pickling; the activated aluminum layer is anodized or electrolessly nickel-plated with a nickel plating thickness of 2-5 μm to prevent the formation of brittle phases at the aluminum-stainless steel interface at high temperatures.

5. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S3, the specific method of the surface nano-treatment is to modify the stainless steel surface by nanoparticles so that the stainless steel surface forms a nanostructure to improve the antibacterial property and self-cleaning ability.

6. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S4, the vacuum packaging is to stack the cleaned modified stainless steel plate and the titanium plate or aluminum plate and put them into a vacuum furnace to ≤10 - 3 Pa, to avoid oxidation inclusions.

7. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S4, the edge welding is performed by electron beam or laser spot welding to fix the relative positions between layers to prevent misalignment during subsequent rolling.

8. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S5, the hot rolling composite adopts gradient temperature control, the stainless steel layer is controlled at 800-950°C; the aluminum layer is controlled at a temperature of ≤400°C; in S6, the annealing temperature is 550-650°C, and the annealing time is 1-3 hours.

9. The method for preparing a multi-layer metal composite plate according to claim 1, wherein: In S7, the rolling pressure of the precision cold rolling is 300-600 MPa; the deformation amount achieved by multiple rolling passes is 50-70%; Rolling speed: 0.5-2m / s.

10. An application of a composite sheet material prepared by the method for preparing a multi-layer metal composite sheet material according to claim 1, characterized in that: The multi-layer metal composite sheet is used in the preparation of cooking utensils.

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