Multi-layer high-strength stainless steel composite plate

Abstract

The utility model discloses a multi-layer high-strength stainless steel composite plate which comprises a base layer, a middle layer and a coating layer which are sequentially arranged, and the base layer, the middle layer and the coating layer are compounded through hot rolling. The middle layer comprises a corrosion-resistant layer, a special layer and a buffer layer, and the corrosion-resistant layer, the special layer and the buffer layer are compounded through explosion; the covering layer comprises a stainless steel layer and a reinforcing layer, and the stainless steel layer and the reinforcing layer are compounded through explosion; the peripheral edge of the joint between the base layer and the middle layer and the peripheral edge of the joint between the covering layer and the middle layer are sawtooth-shaped; the base layer and the covering layer are both made of steel, the overall strength is further enhanced, the special layer is arranged in the composite board to meet the special performance requirement, the buffer layer can better relieve impact of internal materials in the collision process, and the service life of the composite board is prolonged; the edges of the combined surfaces of the base layer, the covering layer and the middle layer are zigzag, so that the compactness can be improved during rolling, and the use effect of the composite board is better.

Description

Technical Field

[0001] This utility model specifically relates to a multi-layer high-strength stainless steel composite plate. Background Technology

[0002] Stainless steel composite panels are sheet materials that combine a base material and a cladding material. Their materials and thicknesses can be freely combined to meet the needs of different users. Stainless steel composite panels not only possess the corrosion resistance of stainless steel but also the good mechanical strength and processing performance of carbon steel, making them a new type of industrial product. They are widely used in industries such as petroleum, chemical, salt, water conservancy, and hydropower. As a resource-saving product, stainless steel composite panels reduce the consumption of precious metals and significantly lower project costs. They achieve a perfect combination of low cost and high performance, resulting in significant social benefits.

[0003] Currently, in some high-end manufacturing industries, the requirements for stainless steel composite plates are increasing, requiring them to reduce structural weight, improve structural strength, and have certain corrosion resistance. At present, most stainless steel composite plates are made of two layers of materials, which have the strength of stainless steel and the characteristics of another base material. However, in specific application scenarios, the characteristics of this type of stainless steel composite plate do not meet the application requirements, which can easily lead to safety hazards during use.

[0004] Therefore, it is necessary to invent a multi-layered high-strength stainless steel composite plate to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a multi-layer high-strength stainless steel composite plate with high strength characteristics.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer high-strength stainless steel composite plate, comprising a base layer, an intermediate layer and a cladding layer arranged sequentially, wherein the base layer, the intermediate layer and the cladding layer are all hot-rolled composites.

[0009] The intermediate layer includes a corrosion-resistant layer, a special layer, and a buffer layer, and the corrosion-resistant layer, the special layer, and the buffer layer are bonded together by explosive bonding.

[0010] The coating includes a stainless steel layer and a reinforcing layer, wherein the stainless steel layer and the reinforcing layer are bonded together by explosive bonding.

[0011] The edges of the junction between the base layer, the cladding layer, and the intermediate layer are serrated.

[0012] Preferably, the base layer is Q345B steel, which is a low-alloy high-strength steel, and its thickness is 70% of the overall thickness.

[0013] Preferably, the corrosion-resistant layer is a nickel-based alloy, and its thickness is 5% of the overall thickness.

[0014] Preferably, the special layer is a titanium-aluminum-vanadium alloy, and its thickness is 6.5% of the overall thickness.

[0015] Preferably, the buffer layer is a copper alloy, and its thickness is 2.5% of the overall thickness.

[0016] Preferably, the stainless steel layer is 316L stainless steel, and its thickness is 6% of the overall thickness.

[0017] Preferably, the reinforcing layer is duplex stainless steel 2205, and its thickness is 10% of the overall thickness.

[0018] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0019] 1. This utility model enhances the overall properties of stainless steel composite plates through multi-layer material composite, and the base layer and the cladding layer are both made of steel, which further enhances the overall strength. It has a special layer inside to meet special performance requirements, and the buffer layer can reduce the impact of internal materials during impact, thus extending the service life of the composite plate.

[0020] 2. In this utility model, the edges of the bonding surfaces between the base layer, the cladding layer, and the intermediate layer are serrated, which can improve the tightness during rolling and make the composite board perform better. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0024] Figure 3 This is a detailed structural diagram of the bonding surface between the base layer and the intermediate layer of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Base layer; 2. Intermediate layer; 21. Corrosion-resistant layer; 22. Special layer; 23. Buffer layer; 3. Covering layer; 31. Stainless steel layer; 32. Reinforcing layer. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figure 1-3 The multi-layer high-strength stainless steel composite plate shown includes a base layer 1, an intermediate layer 2 and a cladding layer 3 arranged sequentially, and the base layer 1, intermediate layer 2 and cladding layer 3 are all hot-rolled composites.

[0029] Specifically, the intermediate layer 2 includes a corrosion-resistant layer 21, a special layer 22, and a buffer layer 23, which are bonded together by explosive bonding.

[0030] Specifically, the cladding 3 includes a stainless steel layer 31 and a reinforcing layer 32, and the stainless steel layer 31 and the reinforcing layer 32 are bonded together by explosive bonding.

[0031] Reference Figure 3 The edges of the junction between the base layer 1, the cover layer 3 and the intermediate layer 2 are serrated.

[0032] In this embodiment, the rolling process is as follows: Each layer of material undergoes surface treatment to remove impurities such as oil and scale, ensuring a good bonding interface. Then, the layers are stacked in a predetermined order and heated to a suitable temperature with applied high rolling pressure, allowing the layers to bond tightly under high temperature and pressure. During rolling, parameters such as rolling speed and reduction must be carefully controlled to ensure the quality of the composite plate. Finally, the rolled composite plate undergoes annealing to eliminate internal stresses generated during rolling and improve the overall performance of the composite plate.

[0033] Specifically, the serrated joint surface helps to improve the bonding between layers, ensuring that there is no risk of layers falling off during use and avoiding quality problems.

[0034] Specifically, base layer 1 is made of Q345B steel, which is a low-alloy high-strength steel, and its thickness is 70% of the overall thickness.

[0035] In this embodiment, the main chemical composition of Q345B steel includes approximately 0.2% carbon, 1.0-1.6% manganese, and 0.5% silicon, along with small amounts of impurities such as phosphorus and sulfur. The presence of manganese improves the steel's strength and toughness, while silicon helps with deoxidation and enhances its strength. Its yield strength is generally around 345 MPa, and its tensile strength is between 470-630 MPa. It exhibits good elongation and can withstand large loads, making it a widely used structural steel in construction, machinery manufacturing, and other fields. In stainless steel composite plates, it serves as the base layer, bearing the main structural stress.

[0036] Specifically, the corrosion-resistant layer 21 is a nickel-based alloy, and its thickness is 5% of the overall thickness.

[0037] In this embodiment, nickel in the nickel-based alloy provides excellent corrosion resistance and high-temperature performance, chromium enhances oxidation resistance and corrosion resistance, molybdenum improves resistance to corrosive media such as chloride ions, and niobium strengthens the alloy. The overall alloy exhibits high yield strength and tensile strength while maintaining good mechanical properties at high temperatures. It demonstrates excellent corrosion resistance in corrosive environments, particularly complex environments such as acidic, alkaline, and seawater conditions. As an intermediate layer in stainless steel composite plates, it prevents element diffusion between the base layer and the cladding, improving the overall corrosion resistance and bonding stability of the composite plate.

[0038] Specifically, the special layer 22 is a titanium-aluminum-vanadium alloy, and its thickness is 6.5% of the overall thickness.

[0039] In this embodiment, aluminum in the titanium-aluminum-vanadium alloy plays a strengthening role, improving the alloy's strength and heat resistance; vanadium refines the grains, improving the alloy's toughness. It features low density and high strength. In stainless steel composite plates, the titanium alloy interlayer can reduce the weight of the composite plate due to its low density, while its good corrosion resistance and bonding properties with other materials help improve the composite plate's performance in special environments.

[0040] Specifically, the buffer layer 23 is made of copper alloy and its thickness is 2.5% of the overall thickness.

[0041] In this embodiment, the C11000 copper alloy exhibits excellent electrical conductivity. In composite board applications requiring conductivity, such as heat dissipation structures or electrical connection components in electronic devices, the copper alloy layer can provide an effective conductive path. For example, in the heat sink composite board of a large computer server, the copper alloy layer can rapidly conduct heat away and also serve as part of the electrical grounding. Besides conductivity, the C11000 copper alloy also possesses excellent thermal conductivity. This gives the composite board an advantage in heat dissipation; in the casing or heat dissipation structure of some heat-generating devices, the copper alloy layer can quickly transfer heat generated inside the device to the external environment, preventing overheating.

[0042] Specifically, in the composite panel structure, the copper alloy layer can achieve good bonding with the adjacent 304 stainless steel layer and the upper layer material. At the same time, the copper alloy is relatively soft, which can play a certain buffering role when the composite panel is subjected to external impact or thermal stress, reducing stress concentration caused by differences in thermal expansion coefficients between layers or external impact.

[0043] Specifically, stainless steel layer 31 is made of 316L stainless steel, and its thickness is 6% of the overall thickness.

[0044] In this embodiment, the stainless steel contains approximately 16-18% chromium, 10-14% nickel, and 2-3% molybdenum. Chromium is a key element for the corrosion resistance of stainless steel, forming a dense chromium oxide protective film; nickel improves the toughness and corrosion resistance of stainless steel; and molybdenum enhances its resistance to corrosive media such as chloride ions. The yield strength is generally around 205 MPa, and the tensile strength is between 520-720 MPa. It exhibits excellent corrosion resistance, particularly in marine and chemical environments containing corrosive media such as chloride ions, and can be used as a cladding to protect the base layer and intermediate layer of the composite panel from corrosion.

[0045] Specifically, the reinforcing layer 32 is duplex stainless steel 2205, and its thickness is 10% of the overall thickness.

[0046] In this embodiment, the duplex stainless steel 2205 contains approximately 22% chromium, 5.5% nickel, 3% molybdenum, and 0.17% nitrogen. The combination of chromium, nickel, and molybdenum provides excellent corrosion resistance, while nitrogen helps improve the strength and corrosion resistance of the stainless steel. Its yield strength can reach over 450 MPa, and its tensile strength is between 620 and 880 MPa. Its duplex structure gives it a good balance between strength and corrosion resistance, making it widely used in stainless steel composite cladding materials in environments requiring both high strength and corrosion resistance, such as petrochemicals and seawater desalination.

[0047] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-layer high-strength stainless steel composite plate, characterized in that: It includes a base layer (1), an intermediate layer (2) and a cover layer (3) arranged in sequence, wherein the base layer (1), the intermediate layer (2) and the cover layer (3) are all hot-rolled composites; The intermediate layer (2) includes a corrosion-resistant layer (21), a special layer (22), and a buffer layer (23), which are bonded together by explosive bonding. The cladding (3) includes a stainless steel layer (31) and a reinforcing layer (32), wherein the stainless steel layer (31) and the reinforcing layer (32) are bonded together by explosive bonding; The edges of the junction between the base layer (1) and the cover layer (3) and the intermediate layer (2) are serrated. The special layer (22) is a titanium-aluminum-vanadium alloy, and its thickness is 6.5% of the overall thickness.

2. The multi-layer high-strength stainless steel composite plate according to claim 1, characterized in that: The base layer (1) is Q345B steel, which is a low-alloy high-strength steel with a thickness of 70% of the overall thickness.

3. The multi-layer high-strength stainless steel composite plate according to claim 1, characterized in that: The corrosion-resistant layer (21) is a nickel-based alloy, and its thickness is 5% of the overall thickness.

4. The multi-layer high-strength stainless steel composite plate according to claim 1, characterized in that: The buffer layer (23) is a copper alloy, and its thickness is 2.5% of the overall thickness.

5. The multi-layer high-strength stainless steel composite plate according to claim 1, characterized in that: The stainless steel layer (31) is 316L stainless steel, and its thickness is 6% of the overall thickness.

6. The multi-layer high-strength stainless steel composite plate according to claim 1, characterized in that: The reinforcing layer (32) is duplex stainless steel 2205, and its thickness is 10% of the overall thickness.

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