Preparation method of composite steel plate with corrosion-resistant function

Abstract

The invention discloses a preparation method of a composite steel plate with an anti-corrosion function, and relates to the technical field of composite steel plate preparation, the composite steel plate comprises base layer steel, a first high-carbon stainless steel layer and an anti-corrosion coating, first reinforcing steel is arranged on one side of the base layer steel, and second reinforcing steel is arranged on the other side of the base layer steel; the first high-carbon stainless steel layer is connected to the other side of the first reinforcing steel, and the other side of the second reinforcing steel is connected with the second high-carbon stainless steel layer. Through the first reinforcing steel and the second reinforcing steel which are arranged on the two sides of the base layer steel, the strength of the whole composite steel plate can be effectively improved, and the situation that the composite steel plate is bent in the actual use process to affect actual use is avoided; meanwhile, the first high-carbon stainless steel layer and the second high-carbon stainless steel layer are arranged on the outer sides of the first reinforcing steel and the second reinforcing steel in a matched mode, so that the composite steel plate has a good corrosion-resistant effect, and the actual service life of the composite steel plate is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of composite steel plate preparation, and in particular to a method for preparing a composite steel plate with corrosion resistance. Background Art

[0002] Composite steel plate refers to a steel plate that is made of a single or multiple steel materials. For example, stainless steel composite steel plate is a steel plate that is made by combining stainless steel plate with ordinary steel plate (carbon structural steel, low alloy high strength structural steel, high quality carbon structural steel, etc.) by using processes such as explosion, rolling or explosion rolling. It has the characteristics of two different types of steel at the same time, with the corrosion resistance of stainless steel and the advantages of ordinary steel such as low price and good rigidity. Composite steel plate is to protect ordinary steel plate from rust. It can be formed by electroplating, gluing and spraying to cover the surface of the steel plate with a protective "coat".

[0003] The corrosion resistance of composite steel plates on the market is relatively poor. The actual composite steel plates are prone to corrosion over a long period of time, which poses a safety risk. At the same time, bubbles are prone to appear inside during the composite process, which affects the overall strength. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a composite steel plate with corrosion resistance so as to solve the problems mentioned in the above background technology that the composite steel plate has poor corrosion resistance, the actual composite steel plate is prone to corrosion over a long period of time and there is a safety risk, and bubbles are prone to appear inside during the composite process, affecting the overall strength.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a method for preparing a composite steel plate with corrosion resistance, comprising a base steel, a first high-carbon stainless steel layer and an anti-corrosion coating, wherein a first reinforcing steel is arranged on one side of the base steel, and a second reinforcing steel is arranged on the other side of the base steel, the first high-carbon stainless steel layer is connected to the other side of the first reinforcing steel, and the other side of the second reinforcing steel is connected to the second high-carbon stainless steel layer, the anti-corrosion coating is arranged on the other side of the first high-carbon stainless steel layer and the second high-carbon stainless steel layer, and the outer side of the anti-corrosion coating is covered with a PVC protective film.

[0006] Preferably, the first reinforcing steel and the second reinforcing steel are symmetrically distributed along the central axis of the base steel, and the thickness ratio between the first reinforcing steel, the second reinforcing steel and the base steel is 1:1:2.

[0007] Preferably, the first high-carbon stainless steel layer and the second high-carbon stainless steel layer are distributed in parallel with the base steel, and the first high-carbon stainless steel layer and the second high-carbon stainless steel layer are welded with the first reinforcement steel and the second reinforcement steel.

[0008] Preferably, the anti-corrosion coating is evenly distributed on the outside of the first high-carbon stainless steel layer and the second high-carbon stainless steel layer, and the PVC protective film is wrapped around the outside of the anti-corrosion coating.

[0009] Preferably, the production process of the composite steel plate with corrosion resistance mainly includes the following steps:

[0010] A. Welding reinforcement steel

[0011] The two sides of the base steel and one side of the first reinforcing steel and the second reinforcing steel are heated respectively, and then the first reinforcing steel and the second reinforcing steel are respectively welded to the two sides of the base steel by hot rolling process under high vacuum environment. Hot rolling welding under high vacuum environment can avoid the appearance of bubbles at the welding point;

[0012] B. Welding of rusted steel layer

[0013] The first reinforcing steel and the second reinforcing steel are heated on one side and the first high-carbon stainless steel layer and the second high-carbon stainless steel layer on one side respectively, and then the first reinforcing steel and the second reinforcing steel are welded to the first high-carbon stainless steel layer and the second high-carbon stainless steel layer by hot rolling in a high vacuum environment;

[0014] C. Anti-corrosion spraying

[0015] The welded composite steel plate is placed for cooling. When the temperature of the composite steel plate is consistent with room temperature, the outer surfaces of the first high-carbon stainless steel layer and the second high-carbon stainless steel layer are sprayed with an anti-corrosion coating.

[0016] D. Clean the film

[0017] The sprayed composite steel plate is air-dried. After the composite steel plate is air-dried, the dust remaining on the surface is cleaned to ensure the sealing between the PVC protective film and the first high-carbon stainless steel layer and the second high-carbon stainless steel layer.

[0018] Preferably, the first reinforcing steel and the second reinforcing steel in step A are made of high-strength steel plates, and the high-strength steel plates are specifically Q460 steel.

[0019] Preferably, the anti-corrosion coating used in the anti-corrosion spraying process of step C is specifically Xunxin NC550 nano-hydrophobic coating.

[0020] The present invention provides a method for preparing a composite steel plate with corrosion resistance, which has the following beneficial effects:

[0021] The present invention can effectively improve the strength of the entire composite steel plate by arranging the first reinforcing steel and the second reinforcing steel on both sides of the base steel, and avoid bending of the composite steel plate during actual use. At the same time, the first high-carbon stainless steel layer and the second high-carbon stainless steel layer arranged on the outside of the first reinforcing steel and the second reinforcing steel make the composite steel plate have a good corrosion resistance, thereby improving the actual service life of the composite steel plate; at the same time, by spraying an anti-corrosion coating on the outside of the first high-carbon stainless steel layer and the second high-carbon stainless steel layer, the anti-corrosion effect of the composite steel plate can be further improved, and the PVC protective film wrapped around the anti-corrosion coating can ensure the safety of the composite steel plate during actual transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic cross-sectional structure diagram of a method for preparing a composite steel plate with corrosion resistance according to the present invention;

[0023] Figure 2 A top view and half-section structure schematic diagram of a method for preparing a composite steel plate with corrosion resistance according to the present invention;

[0024] In the figure: 1. Base steel; 2. First reinforcing steel; 3. Second reinforcing steel; 4. First high-carbon stainless steel layer; 5. Second high-carbon stainless steel layer; 6. Anti-corrosion coating; 7. PVC protective film. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-2 The present invention provides a technical solution: a method for preparing a composite steel plate with corrosion resistance, comprising a base steel 1, a first reinforcing steel 2, a second reinforcing steel 3, a first high-carbon stainless steel layer 4, a second high-carbon stainless steel layer 5, an anti-corrosion coating 6 and a PVC protective film 7, wherein the first reinforcing steel 2 is arranged on one side of the base steel 1, and the second reinforcing steel 3 is arranged on the other side of the base steel 1, the first high-carbon stainless steel layer 4 is connected to the other side of the first reinforcing steel 2, the first reinforcing steel 2 and the second reinforcing steel 3 are symmetrically distributed along the central axis of the base steel 1, and the thickness ratio between the first reinforcing steel 2, the second reinforcing steel 3 and the base steel 1 is 1:1:2, the second high-carbon stainless steel layer 5 is connected to the other side of the second reinforcing steel 3, the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 are distributed in parallel with the base steel 1, and the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 are fused with the first reinforcing steel 2 and the second reinforcing steel 3, and the anti-corrosion coating 6 is arranged on the first high-carbon stainless steel layer 4 and the other side of the second high-carbon stainless steel layer 5, and the outer side of the anti-corrosion coating 6 is covered with a PVC protective film 7, the anti-corrosion coating 6 is evenly distributed on the outer sides of the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5, and the PVC protective film 7 is wrapped on the outer side of the anti-corrosion coating 6, the first reinforcing steel 2 and the second reinforcing steel 3 arranged on both sides of the base steel 1 can effectively improve the strength of the entire composite steel plate and avoid bending of the composite steel plate during actual use. At the same time, the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 arranged on the outer sides of the first reinforcing steel 2 and the second reinforcing steel 3 make the composite steel plate have a good corrosion resistance, thereby improving the actual service life of the composite steel plate. At the same time, by spraying the anti-corrosion coating 6 on the outer sides of the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5, the anti-corrosion effect of the composite steel plate can be further improved, and wrapping the PVC protective film 7 in the anti-corrosion coating 6 can ensure the safety of the composite steel plate during actual transportation.

[0029] The production process of the composite steel plate with corrosion resistance mainly includes the following steps:

[0030] A. Welding reinforcement steel

[0031] The two sides of the base steel 1 and one side of the first reinforcing steel 2 and the second reinforcing steel 3 are heated respectively, and then the first reinforcing steel 2 and the second reinforcing steel 3 are respectively welded to the two sides of the base steel 1 by hot rolling in a high vacuum environment. Hot rolling welding in a high vacuum environment can avoid the appearance of bubbles at the weld.

[0032] The first reinforcing steel 2 and the second reinforcing steel 3 of process A are made of high-strength steel plates, and the strength steel plates are specifically Q460 steel;

[0033] B. Welding of rusted steel layer

[0034] The first reinforcing steel 2 and the second reinforcing steel 3 are heated on one side and the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 on one side, and then the first reinforcing steel 2 and the second reinforcing steel 3 are welded to the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 by hot rolling in a high vacuum environment;

[0035] C. Anti-corrosion spraying

[0036] The welded composite steel plate is placed for cooling. When the temperature of the composite steel plate is consistent with room temperature, the outer surfaces of the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 are sprayed with an anti-corrosion coating 6.

[0037] The anti-corrosion coating 6 used in the anti-corrosion spraying process of step C is specifically Xunxin NC550 nano-hydrophobic coating;

[0038] D. Clean the film

[0039] The sprayed composite steel plate is air-dried. After the composite steel plate is air-dried, the dust remaining on the surface is cleaned to ensure the sealing between the PVC protective film 7 and the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5.

[0040] In summary, the preparation method of the composite steel plate with corrosion resistance function, when used, heats the two sides of the base steel 1 and the one side of the first reinforcing steel 2 and the second reinforcing steel 3 respectively, and then the first reinforcing steel 2 and the second reinforcing steel 3 are respectively welded to the two sides of the base steel 1 by a hot rolling process under a high vacuum environment. Hot rolling welding under a high vacuum environment can avoid the appearance of bubbles at the welding point, and then heats the one side of the first reinforcing steel 2 and the second reinforcing steel 3 and the one side of the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 respectively, and then the first reinforcing steel 2 and the second reinforcing steel 3 are respectively welded to the two sides of the base steel 1 by a hot rolling process under a high vacuum environment. The first reinforcing steel 2 and the second reinforcing steel 3 are welded with the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5, and then the welded composite steel plate is placed for cooling. When the temperature of the composite steel plate is consistent with room temperature, the outer surface of the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5 is sprayed with an anti-corrosion coating 6. Finally, the sprayed composite steel plate is air-dried. After the composite steel plate is air-dried, the dust remaining on its surface is cleaned to ensure the sealing between the PVC protective film 7 and the first high-carbon stainless steel layer 4 and the second high-carbon stainless steel layer 5.

[0041] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite steel plate with corrosion resistance, comprising a base steel (1), a first high carbon stainless steel layer (4) and an anti-corrosion coating (6), characterized in that: A first reinforcing steel (2) is arranged on one side of the base steel (1), and a second reinforcing steel (3) is arranged on the other side of the base steel (1); the first high-carbon stainless steel layer (4) is connected to the other side of the first reinforcing steel (2); the other side of the second reinforcing steel (3) is connected to the second high-carbon stainless steel layer (5); the anti-corrosion coating (6) is arranged on the other side of the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5), and the outer side of the anti-corrosion coating (6) is covered with a PVC protective film (7).

2. The corrosion-resistant composite steel plate according to claim 1, characterized in that: The first reinforcing steel (2) and the second reinforcing steel (3) are symmetrically distributed along the central axis of the base steel (1), and the thickness ratio between the first reinforcing steel (2), the second reinforcing steel (3) and the base steel (1) is 1:1:

2.

3. The corrosion-resistant composite steel plate according to claim 1, characterized in that: The first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5) are distributed in parallel with the base steel (1), and the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5) are fused with the first reinforcing steel (2) and the second reinforcing steel (3).

4. The corrosion-resistant composite steel plate according to claim 1, characterized in that: The anti-corrosion coating (6) is evenly distributed on the outer sides of the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5), and the PVC protective film (7) is wrapped around the outer side of the anti-corrosion coating (6).

5. The method for preparing a composite steel plate with corrosion resistance according to claim 1, characterized in that: The production process of the composite steel plate with corrosion resistance mainly includes the following steps: A. Welding reinforcement steel The two sides of the base steel (1) and one side of the first reinforcing steel (2) and the second reinforcing steel (3) are heated respectively, and then the first reinforcing steel (2) and the second reinforcing steel (3) are respectively welded to the two sides of the base steel (1) by a hot rolling process in a high vacuum environment. The hot rolling welding in a high vacuum environment can avoid the formation of bubbles at the welding point; B. Welding of rusted steel layer The first reinforcing steel (2) and the second reinforcing steel (3) are heated on one side and the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5) on one side respectively, and then the first reinforcing steel (2) and the second reinforcing steel (3) are welded to the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5) by hot rolling in a high vacuum environment; C. Anti-corrosion spraying The welded composite steel plate is placed for cooling, and when the temperature of the composite steel plate is consistent with room temperature, an anti-corrosion coating (6) is sprayed on the outer surfaces of the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5); D. Clean the film The sprayed composite steel plate is air-dried. After the composite steel plate is air-dried, the dust remaining on the surface is cleaned to ensure the sealing between the PVC protective film (7) and the first high-carbon stainless steel layer (4) and the second high-carbon stainless steel layer (5).

6. The method for preparing a composite steel plate with corrosion resistance according to claim 5, characterized in that: The first reinforcing steel (2) and the second reinforcing steel (3) in the step A are made of high-strength steel plates, and the high-strength steel plates are specifically Q460 steel.

7. The method for preparing a composite steel plate with corrosion resistance according to claim 5, characterized in that: The anti-corrosion coating (6) used in the anti-corrosion spraying process of step C is specifically Xunxin NC550 nano-hydrophobic coating.

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