A method for manufacturing a heat dissipation metal composite strip

Abstract

This application provides a method for manufacturing a heat-dissipating metal composite strip, comprising: providing a first metal layer and a second metal layer; providing a first heating device and a second heating device; heating the first metal layer to a first temperature in the first heating device, and heating the second metal layer to a second temperature in the second heating device; and bonding and extruding the first metal layer and the second metal layer. The manufacturing method of the heat-dissipating metal composite strip of this invention can precisely control the thickness of each metal layer in the metal composite strip and improve processing efficiency.

Description

Technical Field

[0001] This application relates to the field of metal processing technology, and in particular to a method for manufacturing a heat dissipation metal composite strip. Background Technology

[0002] This invention relates to the field of metal processing. In existing technologies, it is often necessary to press metal sheets of multiple materials into composite sheets to achieve better performance. However, it is usually impossible to precisely control the thickness ratio of each material after pressing. Especially in the 3C heat dissipation field, some current processes use two metal strips, A and B, to achieve ultra-thin copper layer composite metal strip manufacturing through controlled composite processes. This method of setting the electroplating layer is not only energy-intensive and inefficient, but also unsuitable for products with excessive thickness. Furthermore, existing pressing technologies cannot achieve precise control of the thickness ratio. Therefore, a method is needed that can both precisely control the thickness of each metal layer in the metal composite strip and improve processing efficiency. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a method for manufacturing a heat-dissipating metal composite strip, which can both precisely control the thickness of each metal layer in the metal composite strip and improve processing efficiency.

[0004] A method for manufacturing a heat-dissipating metal composite strip according to an embodiment of the present invention includes: providing a first metal layer and a second metal layer; providing a first heating device and a second heating device; heating the first metal layer to a first temperature in the first heating device, and heating the second metal layer to a second temperature in the second heating device; and bonding and extruding the first metal layer and the second metal layer.

[0005] According to an embodiment of the present invention, a method for manufacturing a heat-dissipating metal composite strip has at least the following beneficial effects: by using different heating devices, namely a first heating device and a second heating device, the first metal layer and the second metal layer can be heated to different temperatures, thereby enabling the first metal layer and the second metal layer to obtain controllable different elongations under specific pressure. That is, by adjusting the first temperature and the second temperature, the thickness ratio of the first metal layer and the second metal layer after bonding and extrusion can be controlled.

[0006] According to some embodiments of the present invention, the material of the first metal layer is stainless steel, the material of the second metal layer is copper, the first temperature is not less than 110°C and not more than 150°C, and the second temperature is not more than 750°C and not less than 450°C.

[0007] According to some embodiments of the present invention, before the first metal layer enters the first heating device, the side of the first metal layer facing the second metal layer is cleaned, and before the second metal layer enters the second heating device, the side of the second metal layer facing the first metal layer is cleaned.

[0008] According to some embodiments of the present invention, the manufacturing method of the heat dissipation metal composite strip further includes: providing a third metal layer and a third heating device, heating the third metal layer to a third temperature in the third heating device, and attaching the third metal layer to the side of the first metal layer opposite to the second metal layer and pressing it.

[0009] According to some embodiments of the present invention, the ambient temperature during the extrusion of the first metal layer and the second metal layer is a fourth temperature, the fourth temperature is not greater than the first temperature, and the difference between the fourth temperature and the first temperature does not exceed 100°C.

[0010] According to some embodiments of the present invention, a rolling device is provided, which is used to roll the first metal layer and the second metal layer when pressing the first metal layer and the second metal layer together. The rolling speed of the rolling device is not greater than 1.6 m / min and not less than 0.7 m / min.

[0011] According to some embodiments of the present invention, the total deformation of the first metal layer and the second metal layer before and after pressing is not greater than 60% and not less than 40%.

[0012] According to some embodiments of the present invention, the first metal layer enters the rolling device at a first speed, and the second metal layer enters the rolling device at a second speed, wherein the second speed is less than the first speed.

[0013] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of one embodiment of a heat dissipation metal composite strip of the present invention;

[0015] Figure 2 This is a schematic diagram of another embodiment of a heat dissipation metal composite strip of the present invention;

[0016] Figure 3 This is a schematic diagram of a method for manufacturing a heat-dissipating metal composite strip according to the present invention.

[0017] Icon labels:

[0018] 1. First metal layer; 2. Second metal layer; 3. Third metal layer; 4. Roller pressing device; 5. First feeding device; 6. First heating device; 7. Second feeding device; 8. Second heating device. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] In current technological fields, the rolling composite manufacturing method for metal composite strips utilizes the pressure generated during rolling to cause simultaneous plastic deformation of two or more metal plates, resulting in the surface metal layers cracking and exposing clean and activated metal, thereby forming a metallurgical bond between the plates. However, the thickness ratio between different metal layers in the metal composite strip is usually achieved directly by controlling the thickness of the metal plates before pressing, making it extremely inconvenient to adjust the metal ratio of the metal composite strip.

[0024] In some metal composite strip pressing processes, heating of the composite strip to be pressed is often included. This heating is typically done synchronously, with the temperatures of each metal layer essentially within the same range. High temperatures accelerate the diffusion rate of elements at the interface of the metal composite strip, enhancing the metallurgical bonding strength and the plastic deformation capacity of the metal, allowing the metal strip to better adhere and form during pressing. Therefore, current heating methods in metal composite strip pressing processes do not allow for controlling the deformation of different metal layers under the same pressure, thus making it impossible to adjust or control the thickness ratio during pressing. In contrast, the embodiments of this application control the deformation of the metal layers under extrusion pressure by controlling the temperature of different metal layers, achieving adjustment or control of the thickness ratio of different metal layers after bonding and extrusion during pressing. This control method is more flexible and convenient.

[0025] Reference Figure 1 and Figure 3A method for manufacturing a heat-dissipating metal composite strip according to a first aspect embodiment of the present invention includes: providing a first metal layer 1 and a second metal layer 2; providing a first heating device 6 and a second heating device 8; heating the first metal layer 1 to a first temperature in the first heating device 6, and heating the second metal layer 2 to a second temperature in the second heating device 8; and bonding and extruding the first metal layer 1 and the second metal layer 2. Under the same extrusion pressure, temperature differences in the metals will result in different amounts of deformation. When the metal is at a lower temperature, its molecular activity is weaker, and its resistance to deformation is stronger, so the amount of deformation is relatively smaller. Conversely, when the metal temperature rises, molecular activity increases, the material becomes relatively softer, and its resistance to deformation weakens, thus producing a larger amount of deformation under the same extrusion pressure. When bonding and extruding the first metal layer 1 and the second metal layer 2, the extrusion pressure on the first metal layer 1 and the second metal layer 2 is the same. However, in order to control the thickness ratio of the first metal layer 1 and the second metal layer 2 in forming the metal composite strip, it is necessary to control the amount of deformation of the first metal layer 1 and the second metal layer 2 under extrusion pressure. Therefore, before pressing the first metal layer 1 and the second metal layer 2 together, the first metal layer 1 is heated to a first temperature, and the second metal layer 2 is heated to a second temperature. This allows for controllable deformation of the first metal layer 1 and the second metal layer 2 when pressed simultaneously. For example, if a greater deformation of the first metal layer 1 is required, the first temperature can be increased or the second temperature can be decreased. Increasing the first temperature makes the first metal layer 1 softer when pressed, resulting in a larger deformation. Conversely, decreasing the second temperature makes the second metal layer 2 harder, resulting in a smaller deformation, which in turn allows for a larger deformation of the first metal layer 1. Therefore, by controlling the first and second temperatures, the thickness ratio between the first metal layer 1 and the second metal layer 2 in the metal composite strip can be controlled.

[0026] From a microscopic perspective, heating the first metal layer 1 and the second metal layer 2 intensifies the movement of atoms within them. This allows the first and second metal layers 1 and 2 to fuse with higher mass under relatively low pressure. It's important to note that during the pressing process, the side of the first metal layer 1 facing away from the second metal layer 2, and the side of the second metal layer 2 facing away from the first metal layer 1, are pressed together. This method ensures that the compressive force on both layers is the same. Therefore, the deformation of the first and second metal layers 1 cannot be adjusted by changing the compressive force, and the proportions of the individual metal layers in the composite strip cannot be adjusted by changing the pressure. In this embodiment, by heating the first metal layer 1 and the second metal layer 2 separately, the first metal layer 1 and the second metal layer 2 are at different temperatures during pressing. By adjusting the temperature of the first metal layer 1 and the second metal layer 2, the thickness of the first metal layer 1 and the second metal layer 2 under the same pressure during simultaneous pressing can be adjusted, thereby adjusting the thickness ratio of each metal layer in the metal composite strip.

[0027] According to some embodiments of the present invention, the material of the first metal layer 1 is stainless steel, and the material of the second metal layer 2 is copper. The first temperature is not less than 110°C and not more than 150°C, and the second temperature is not more than 750°C and not less than 450°C. The materials of each metal layer in the metal composite strip can be selected according to the characteristics required by the actual scenario. For example, when the metal composite strip requires both good support and good conductivity, the first metal layer 1 can be made of stainless steel, and the second metal layer 2 can be made of copper. Simultaneously, when stronger conductivity is required, the thickness ratio of the second metal layer 2 can be increased; when stronger support is required, the thickness ratio of the first metal layer 1 can be increased. The thickness ratio of the first metal layer 1 and the second metal layer 2 is controlled by adjusting the specific temperatures of the first and second metal layers. Furthermore, limiting the specific values ​​of the first and second temperatures avoids both low temperatures that make fusion difficult and excessively high temperatures that cause melting. For example, the first metal layer can be made of aluminum, and the second metal layer can be made of copper, etc. It is important to note that different metal materials can be selected for the first metal layer 1 and the second metal layer 2 depending on the application scenario. Furthermore, after selecting the metal materials, the thickness of the first metal layer 1 and the second metal layer 2 should be set according to the structural strength or conductivity requirements of the application scenario. Then, based on the thickness and hardness of the first metal layer 1, an appropriate temperature should be selected to determine the thickness of each metal layer in the heat dissipation composite metal strip.

[0028] According to some embodiments of the present invention, before the first metal layer 1 enters the first heating device 6, the side of the first metal layer 1 facing the second metal layer 2 is cleaned, and before the second metal layer 2 enters the second heating device 8, the side of the second metal layer 2 facing the first metal layer 1 is cleaned. This effectively prevents impurities on the surface of the first metal layer 1 and / or the second metal layer 2 (such as oxides, sulfides, etc., forming an isolation layer during the pressing process) from affecting the bonding strength after pressing. After cleaning, defects such as pits and scratches formed by impurities embedded in the surface of the composite strip during the pressing process can also be avoided, improving the mechanical properties of the metal composite strip and avoiding corrosion problems caused by impurities, thus extending its service life. In specific implementations, the surfaces of the first metal layer 1 and / or the second metal layer 2 can be cleaned using various cleaning methods such as high-pressure washing and grinding.

[0029] According to some embodiments of the present invention, with reference to Figure 2 The manufacturing method of the heat-dissipating metal composite strip also includes: providing a third metal layer 3 and a third heating device; heating the third metal layer 3 to a third temperature in the third heating device; and attaching the third metal layer 3 to the side of the first metal layer 1 facing away from the second metal layer 2 and pressing it. As needed, more metal layers can be provided to obtain composite metal strips with more diverse properties.

[0030] If the temperature of the first metal layer 1 and the second metal layer 2 drops too quickly during processing, it will cause the hardness of the first metal layer 1 and the second metal layer 2 to increase, resulting in the heat dissipation composite metal strip not being able to be pressed to the preset thickness, and causing a large deviation in the thickness ratio of the first metal layer 1 and the second metal layer 2 in the composite metal strip. Based on this, according to some embodiments of the present invention, the ambient temperature during the extrusion of the first metal layer 1 and the second metal layer 2 is a fourth temperature, which is not greater than the first temperature, and the difference between the fourth temperature and the first temperature does not exceed 100°C. By setting the fourth temperature, excessive heat loss after the first metal layer 1 and the second metal layer 2 are heated can be avoided. The fourth temperature does not exceed the lower of the first and second temperatures, i.e., it does not exceed the first temperature, thereby avoiding secondary heating of the first metal layer 1 or the second metal layer 2.

[0031] According to some embodiments of the present invention, a rolling device 4 is provided. When pressing the first metal layer 1 and the second metal layer 2, the rolling device 4 is used to roll the first metal layer 1 and the second metal layer 2. The rolling speed of the rolling device 4 is not greater than 1.6 m / min and not less than 0.7 m / min. Within this range, the rolling speed of the rolling device 4 can effectively avoid problems such as increased wear and uneven material deformation between the rolling device 4 and the metal composite strip caused by excessively high rolling speeds, and also avoid problems such as slippage or damage to the metal composite strip on the rolling device 4 caused by excessively slow rolling speeds, thus effectively improving the quality of the metal composite strip. Preferably, the rolling speed of the rolling device 4 is set to 1 m / min. This achieves both high product quality and high processing efficiency.

[0032] According to some embodiments of the present invention, the total deformation of the first metal layer 1 and the second metal layer 2 before and after pressing is not greater than 60% and not less than 40%. If the total deformation is too small, the fusion between the first metal layer 1 and the second metal layer 2 may be insufficient, while if the total deformation is too large, the metal composite strip may break. By controlling the total deformation after pressing within a suitable range, the first metal layer 1 and the second metal layer 2 can be fully fused together, and the risk of breakage can be reduced.

[0033] According to some embodiments of the present invention, the first metal layer 1 enters the rolling device 4 at a first speed, and the second metal layer 2 enters the rolling device 4 at a second speed, which is less than the first speed. While controlling the first temperature and the second temperature to adjust the thickness ratio of the first metal layer 1 and the second metal layer 2, the feeding speed, i.e., the first speed and the second speed, can also be adjusted according to the material ratio, so that the various metal layers of the metal composite strip are fused more uniformly.

[0034] According to an embodiment of the present invention, a metal composite strip processing device includes: a first feeding device 5 for releasing a first metal layer 1 at a first speed; a second feeding device 7 for releasing a second metal layer 2 at a second speed; a first heating device 6 disposed downstream of the first feeding device 5 for heating the first metal layer 1 released by the first feeding device 5 to a first temperature; a second heating device 8 disposed downstream of the second feeding device 7 for heating the second metal layer 2 released by the second feeding device 7 to a second temperature; and a rolling device 4 disposed downstream of the first heating device 6 and the second heating device 8 for rolling the heated first metal layer 1 and the heated second metal layer 2.

[0035] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A method for manufacturing a heat-dissipating metal composite strip, characterized in that, include: Provide a first metal layer and a second metal layer; Provide a first heating device and a second heating device; The first metal layer is heated to a first temperature in the first heating device, and the second metal layer is heated to a second temperature in the second heating device; The first metal layer and the second metal layer are bonded and extruded. The material of the first metal layer is stainless steel, and the material of the second metal layer is copper. The first temperature is not less than 110°C and not more than 150°C, and the second temperature is not more than 750°C and not less than 450°C. A rolling device is provided. When pressing the first metal layer and the second metal layer together, the rolling device is used to roll the first metal layer and the second metal layer. The rolling speed of the rolling device is not greater than 1.6 m / min and not less than 0.7 m / min. The manufacturing method of the heat dissipation metal composite strip further includes: providing a third metal layer and a third heating device, heating the third metal layer to a third temperature in the third heating device, and attaching the third metal layer to the side of the first metal layer facing away from the second metal layer and pressing it. The ambient temperature during the extrusion of the first metal layer and the second metal layer is a fourth temperature, which is not greater than the first temperature, and the difference between the fourth temperature and the first temperature is not more than 100°C. The total deformation of the first metal layer and the second metal layer before and after pressing is not greater than 60% and not less than 40%.

2. The method for manufacturing a heat-dissipating metal composite strip according to claim 1, characterized in that, The first metal layer enters the rolling device at a first speed, and the second metal layer enters the rolling device at a second speed, which is less than the first speed.

3. The method for manufacturing a heat-dissipating metal composite strip according to claim 1, characterized in that, Before the first metal layer enters the first heating device, the side of the first metal layer facing the second metal layer is cleaned, and before the second metal layer enters the second heating device, the side of the second metal layer facing the first metal layer is cleaned.

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