Low-tin composite tinplate

Abstract

The utility model relates to the technical field of tinplate materials, in particular to a low-tin composite tinplate which comprises a main body, a top layer is fixedly connected to the bottom of the main body, and a bottom layer is fixedly connected to the bottom of the top layer. Alloys such as the chromium alloy layer, the nickel alloy layer, the hard alloy layer and the corrosion-resistant alloy layer are added into the tinplate to form the composite tinplate, the use amount of tin is reduced, chromium in alloy steel with high chromium content tends to enable carbides to be distributed in a dispersed and isolated mode, the strength of steel is obviously improved through chromium, and the service life of the composite tinplate is prolonged. Under the condition of the same strength and hardness, chromium steel has higher plasticity than carbon steel, nickel has good mechanical, physical and chemical properties, and proper elements are added, so that the oxidation resistance, corrosion resistance and high-temperature strength of the chromium steel can be improved, and some physical properties can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tinplate materials, in particular to a low-tin composite tinplate. Background Art

[0002] Tinplate is a sheet of iron with a layer of tin on the surface. It is not easy to rust and is also called tin-plated iron. This kind of coated steel plate has been called "tinplate" in China for a long time. Due to the shortage of metal tin materials, research on reducing the thickness of the tin-plated layer of tinplate has begun worldwide. Tinplate (commonly known as tinplate) refers to a steel plate with a thin layer of metal tin on the surface. Tinplate is a steel plate rolled from low carbon steel into a steel plate with a thickness of about 2mm. After pickling, cold rolling, electrolytic cleaning annealing, flattening, trimming, and then cleaning, electroplating, soft melting, passivation treatment, and oiling, it is sheared into a tin-plated sheet product. The tin used for tinplate is high-purity tin (Sn>99.8%). The tin layer can also be applied by hot dip plating. The tin layer of the tinplate obtained by this method is thicker and the amount of tin used is large. No purification treatment is required after tin plating. Tinplate is an iron sheet with a layer of tin on the surface. It is not easy to rust and is also called tin-plated iron. This type of coated steel plate was called "tinplate" in China for a long time. The name "tinplate" was not accurate, so it was renamed tinplate at the China Tinplate Conference in 1973, and the name "tinplate" was no longer used in official documents.

[0003] At present, the problems of rust and quality of physical and chemical indicators of coating film in the process of using tinplate are analyzed and solutions are proposed. Tinplate is exposed to the air for a long time, and the water vapor in the air can easily form dew points on the surface and edge of cold tinplate to form a primary battery, which accelerates the rust of its surface and edges, especially in the spring with heavy humidity in the south. After opening the package, dew points will accumulate on the surface of tinplate quickly. The longer the time, the easier it is for the tinplate to condense, which will undoubtedly affect the coating of the paint. High-temperature dry-drying tinplate is prone to rust. Therefore, a low-tin composite tinplate is needed to improve the above problems. Utility Model Content

[0004] In order to solve the problems of rust and quality of coating physical and chemical indicators of tinplate during use, the paper analyzes and proposes solutions. Tinplate is exposed to the air for a long time, and the water vapor in the air can easily form dew points on the surface and edge of the cold tinplate to form a primary battery, which accelerates the rust of its surface and edges, especially in the spring with heavy humidity in the south. After opening the package, dew points will accumulate on the surface of the tinplate quickly. The longer the time, the easier it is for the tinplate to condense, which will undoubtedly affect the coating of the paint. High-temperature dry-drying tinplate is prone to rust. The purpose of the utility model is to provide a low-tin composite tinplate to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A low-tin composite tinplate, comprising a main body, a top layer fixedly connected to the bottom of the main body, and a bottom layer fixedly connected to the bottom of the top layer;

[0007] The top layer includes a first tin-plated layer, a first stamped thin steel plate layer is fixedly connected to the bottom of the first tin-plated layer, a chromium alloy layer is fixedly connected to the bottom of the first stamped thin steel plate layer, a nickel alloy layer is fixedly connected to the bottom of the chromium alloy layer, a hard alloy layer is fixedly connected to the bottom of the nickel alloy layer, and a corrosion-resistant alloy layer is fixedly connected to the bottom of the hard alloy layer.

[0008] As a preferred solution of the utility model, the bottom layer includes a second tin-plated layer, and a second stamped thin steel plate layer is fixedly connected to the top of the second tin-plated layer.

[0009] As a preferred solution of the utility model, a high-temperature alloy layer is fixedly connected to the top of the second stamped thin steel plate layer, and a magnetic alloy layer is fixedly connected to the top of the high-temperature alloy layer.

[0010] As a preferred solution of the utility model, a memory alloy layer is fixedly connected to the top of the magnetic alloy layer, and the magnetic alloy layer and the memory alloy layer have the same size.

[0011] As a preferred solution of the utility model, the first tin-plated layer, the first stamped thin steel plate layer and the chromium alloy layer have the same size.

[0012] As a preferred solution of the utility model, the nickel alloy layer, the hard alloy layer and the corrosion-resistant alloy layer have the same size.

[0013] As a preferred solution of the present invention, the second tin-plated layer, the second stamped thin steel plate layer and the high-temperature alloy layer have the same size.

[0014] As a preferred solution of the utility model, the first tin-plated layer, the first stamped thin steel plate layer, the chromium alloy layer, the nickel alloy layer, the hard alloy layer and the corrosion-resistant alloy layer are tightly attached.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In the utility model, by adding alloys such as chromium alloy layer, nickel alloy layer, hard alloy layer and corrosion-resistant alloy layer into tinplate, the composite tinplate formed can reduce the usage of tin, and chromium has a tendency to disperse and isolate carbides in alloy steel with high chromium content, and chromium also significantly improves the strength of steel. Under the same strength and hardness conditions, chromium steel has higher plasticity than carbon steel, and nickel has good mechanical, physical and chemical properties. Adding suitable elements can improve its oxidation resistance, corrosion resistance, high temperature strength and improve certain physical properties.

[0017] 2. In the utility model, by adding alloy layers such as high-temperature alloy layer, magnetic alloy layer and memory alloy layer into the interior of tinplate, the high-temperature alloy layer will reduce the phase line temperature of the composite tinplate, increase the recrystallization temperature of the composite tinplate matrix, reduce the thermal diffusion coefficient, increase the resistance to thermal deformation, reduce plasticity, and make it less likely to deform, thereby increasing the service life of the composite tinplate product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0020] Figure 3 It is a schematic diagram of the top-level decomposition structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the bottom layer decomposition structure of the utility model.

[0022] In the figure: 1. main body; 2. top layer; 201. first tin-plated layer; 202. first stamped thin steel plate layer; 203. chromium alloy layer; 204. nickel alloy layer; 205. hard alloy layer; 206. corrosion-resistant alloy layer; 3. bottom layer; 301. second tin-plated layer; 302. second stamped thin steel plate layer; 303. high-temperature alloy layer; 304. magnetic alloy layer; 305. memory alloy layer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] Example: See Figure 1-Figure 4 The low-tin composite tinplate shown comprises a main body 1, a top layer 2 is fixedly connected to the bottom of the main body 1, and a bottom layer 3 is fixedly connected to the bottom of the top layer 2;

[0025] In this embodiment, refer to Figure 1 and Figure 3As shown, the top layer 2 includes a first tin-plated layer 201, a first stamped thin steel plate layer 202 is fixedly connected to the bottom of the first stamped thin steel plate layer 202, a chromium alloy layer 203 is fixedly connected to the bottom of the chromium alloy layer 203, a nickel alloy layer 204 is fixedly connected to the bottom of the nickel alloy layer 204, a hard alloy layer 205 is fixedly connected to the bottom of the hard alloy layer 205, and a corrosion-resistant alloy layer 206 is fixedly connected to the bottom of the hard alloy layer 205. The chromium alloy layer 203, the nickel alloy layer 204, the hard alloy layer 205, the corrosion-resistant alloy layer 206 and other alloys are added to the inside of the tinplate to form a composite tinplate and reduce the use of tin. In alloy steels with a high chromium content, chromium has a tendency to disperse and isolate carbides. Chromium also significantly improves the strength of steel. Under the same strength and hardness conditions, chromium steel has higher plasticity than carbon steel. Nickel has good mechanical, physical and chemical properties. Adding suitable elements can improve its oxidation resistance, corrosion resistance, high temperature strength and improve certain physical properties.

[0026] In this embodiment, refer to Figure 1 , Figure 2 and Figure 4 As shown, the bottom layer 3 includes a second tin-plated layer 301, a second stamped thin steel plate layer 302 is fixedly connected to the top of the second tin-plated layer 301, a high-temperature alloy layer 303 is fixedly connected to the top of the second stamped thin steel plate layer 302, a magnetic alloy layer 304 is fixedly connected to the top of the high-temperature alloy layer 303, a memory alloy layer 305 is fixedly connected to the top of the magnetic alloy layer 304, the magnetic alloy layer 304 has the same size as the memory alloy layer 305, the first tin-plated layer 201, the first stamped thin steel plate layer 202 and the chromium alloy layer 203 have the same size, the nickel alloy layer 204, the cemented carbide layer 205 and the corrosion-resistant alloy layer 206 have the same size, and the second The tin-plated layer 301, the second stamped thin steel plate layer 302 and the high-temperature alloy layer 303 have the same size, the first tin-plated layer 201, the first stamped thin steel plate layer 202, the chromium alloy layer 203, the nickel alloy layer 204, the cemented carbide layer 205 and the corrosion-resistant alloy layer 206 are closely fitted, and alloy layers such as the high-temperature alloy layer 303, the magnetic alloy layer 304 and the memory alloy layer 305 are added to the inside of the tinplate. The high-temperature alloy layer 303 will reduce the phase line temperature of the composite tinplate, increase the recrystallization temperature of the composite tinplate matrix, reduce the thermal diffusion coefficient, increase the resistance to thermal deformation, reduce plasticity, and is not easy to deform, thereby increasing the service life of the composite tinplate product.

[0027] In the present scheme, a low-tin composite tinplate is used by sequentially adding a chromium alloy layer 203, a nickel alloy layer 204, a hard alloy layer 205, a corrosion-resistant alloy layer 206, a high-temperature alloy layer 303, a magnetic alloy layer 304 and a memory alloy layer 305 between a first stamped thin steel plate layer 202 and a second stamped thin steel plate layer 302, and a first tin-plated layer 201 is added to the top of the first stamped thin steel plate layer 202, and a second tin-plated layer 301 is added to the bottom of the second stamped thin steel plate layer 302. After pickling, cold rolling, electrolytic cleaning annealing, flattening, edge trimming, cleaning, electroplating, soft melting, passivation treatment, and oiling, it can be sheared into a finished composite tinplate sheet.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-tin composite tinplate, comprising a main body (1), characterized in that: The bottom of the main body (1) is fixedly connected to a top layer (2), and the bottom of the top layer (2) is fixedly connected to a bottom layer (3); The top layer (2) comprises a first tin-plated layer (201), the bottom of the first tin-plated layer (201) is fixedly connected to a first stamped thin steel plate layer (202), the bottom of the first stamped thin steel plate layer (202) is fixedly connected to a chromium alloy layer (203), the bottom of the chromium alloy layer (203) is fixedly connected to a nickel alloy layer (204), the bottom of the nickel alloy layer (204) is fixedly connected to a hard alloy layer (205), and the bottom of the hard alloy layer (205) is fixedly connected to a corrosion-resistant alloy layer (206).

2. The low-tin composite tinplate according to claim 1, characterized in that: The bottom layer (3) comprises a second tin-plated layer (301), and a second stamped thin steel plate layer (302) is fixedly connected to the top of the second tin-plated layer (301).

3. The low-tin composite tinplate according to claim 2, characterized in that: A high-temperature alloy layer (303) is fixedly connected to the top of the second stamped thin steel plate layer (302), and a magnetic alloy layer (304) is fixedly connected to the top of the high-temperature alloy layer (303).

4. The low-tin composite tinplate according to claim 3, characterized in that: A memory alloy layer (305) is fixedly connected to the top of the magnetic alloy layer (304), and the magnetic alloy layer (304) and the memory alloy layer (305) have the same size.

5. The low-tin composite tinplate according to claim 1, characterized in that: The first tin-plated layer (201), the first stamped thin steel plate layer (202) and the chromium alloy layer (203) have the same size.

6. The low-tin composite tinplate according to claim 1, characterized in that: The nickel alloy layer (204), the hard alloy layer (205) and the corrosion-resistant alloy layer (206) have the same size.

7. The low-tin composite tinplate according to claim 3, characterized in that: The second tin-plated layer (301), the second stamped thin steel plate layer (302) and the high-temperature alloy layer (303) have the same size.

8. The low-tin composite tinplate according to claim 1, characterized in that: The first tin-plated layer (201), the first stamped thin steel plate layer (202), the chromium alloy layer (203), the nickel alloy layer (204), the hard alloy layer (205) and the corrosion-resistant alloy layer (206) are tightly attached.

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