Steel-aluminum composite heating device
By designing a steel-aluminum composite heating device, the aluminum strip and steel strip are heated to a high-temperature semi-liquid and sufficient heat state, the existing liquid-cooled plates have been solved and the high strength of steel-aluminum composite materials has been achieved. and stability to ensure that the composite interface is not easy to layer.
Patent Information
- Application Number
- CN202420722099.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-08
AI Technical Summary
The existing liquid-cooled plates cannot meet the thermal management needs under high temperature conditions and lack high-strength steel-aluminum composite preheating equipment.
Design a steel-aluminum composite heating device, which is heated to a high-temperature semi-liquid and sufficient heat state through aluminum tape and steel tape respectively in the heating chamber. It adopts a reducing gas and a positive pressure environment, and combines an electromagnetic or resistive heating unit to ensure the aluminum tape and The strength and stability of steel strips during hot-rolling composite.
It realizes high strength and stability of steel and aluminum composite materials, prevents oxidation, ensures that the composite interface is not easy to delaminate, and improves thermal management performance.
Smart Images
Figure CN222211203U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steel-aluminum composite technology, in particular to a steel-aluminum composite heating device. Background Art
[0002] With the rapid development of new energy vehicles and energy storage industries, battery packs and battery groups are becoming heavier, larger, and charging time shorter, so higher requirements are placed on the thermal management of battery packs and battery groups. It is inevitable to use a liquid cooling plate structure for heat exchange. At present, the liquid cooling plate adopts aluminum alloy brazing process. When the brazing temperature exceeds 600℃, the strength and impact resistance of the liquid cooling plate cannot meet the requirements.
[0003] Steel and aluminum are both important basic metal materials, widely used in industrial, civil and other fields. Aluminum has good electrical and thermal conductivity, and steel has good temperature resistance and high strength. Steel-aluminum composite plates and strips combine the thermal conductivity, low-temperature welding and lightweight properties of aluminum with the high chemical stability, good high strength, impact resistance and high temperature resistance of steel. They have a wide range of uses, such as in automobiles, lithium battery packs, energy storage thermal management, etc.
[0004] At present, there is still a lack of preheating equipment for high-strength composite steel and aluminum, and it is necessary to develop a steel-aluminum composite heating device. Summary of the invention
[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a steel-aluminum composite heating device, by which the steel strip and the aluminum strip are heated separately to have sufficient heat and then hot-rolled for composite, so as to improve the composite strength.
[0006] In order to achieve the above-mentioned inventive object of the utility model, a steel-aluminum composite heating device is provided, comprising an aluminum strip heating chamber and a steel strip heating chamber which are distributed up and down;
[0007] The aluminum strip heating chamber is provided with a first heating unit and is filled with reducing gas. The aluminum strip heating chamber is under positive pressure. An aluminum strip inlet and an aluminum strip outlet are respectively provided at two ends of the aluminum strip heating chamber.
[0008] A second heating unit is arranged in the steel strip heating chamber and is filled with reducing gas. The steel strip heating chamber is under positive pressure. A steel strip inlet and a steel strip outlet are arranged at two ends of the steel strip heating chamber respectively.
[0009] Preferably, the length of the aluminum strip heating chamber is 20m-40m, and the length of the steel strip heating chamber is 20m-40m.
[0010] Preferably, the air pressure in the aluminum strip heating chamber is 10Pa-30Pa higher than the external air pressure, and the air pressure in the steel strip heating chamber is 10Pa-30Pa higher than the external air pressure.
[0011] Preferably, the first heating unit is an electromagnetic heating unit or a resistance heating unit, and the second heating unit is an electromagnetic heating unit or a resistance heating unit.
[0012] Preferably, the heights of the aluminum strip inlet and the aluminum strip outlet are both 2mm-8mm, and the heights of the steel strip inlet and the steel strip outlet are both 4mm-12mm.
[0013] Preferably, the temperature of the aluminum strip heating chamber is 270°C-430°C, and the temperature of the steel strip heating chamber is 350°C-680°C.
[0014] Preferably, a first graphite block and a second graphite block are respectively arranged on the upper and lower sides of the aluminum strip inlet, and a third graphite block and a fourth graphite block are respectively arranged on the upper and lower sides of the aluminum strip outlet.
[0015] Preferably, the first graphite block is provided with a first curved surface, the second graphite block is provided with a second curved surface, and the first curved surface and the second curved surface form a bell mouth;
[0016] The third graphite block is provided with a third curved surface, the fourth graphite block is provided with a fourth curved surface, and the third curved surface and the fourth curved surface form a bell mouth.
[0017] Preferably, a fifth graphite block and a sixth graphite block are respectively arranged on the upper and lower sides of the steel strip inlet, and a seventh graphite block and an eighth graphite block are respectively arranged on the upper and lower sides of the steel strip outlet.
[0018] Preferably, the fifth graphite block is provided with a fifth curved surface, the sixth graphite block is provided with a sixth curved surface, and the fifth curved surface and the sixth curved surface form a bell mouth;
[0019] The seventh graphite block is provided with a seventh curved surface, the eighth graphite block is provided with an eighth curved surface, and the seventh curved surface and the eighth curved surface form a bell mouth.
[0020] Through the above technical solution, the technical effects achieved are as follows:
[0021] (1) The aluminum strip is heated by the aluminum strip heating chamber, and the steel strip is heated by the steel strip heating chamber. After the heating is completed, hot rolling is performed. In view of the small unwinding tension of the aluminum strip, the aluminum strip heating chamber is arranged above the steel strip heating chamber to facilitate unwinding.
[0022] (2) The aluminum strip heating chamber and the steel strip heating chamber are respectively filled with reducing gas and positive pressure during the heating process, thereby preventing the aluminum strip and the steel strip from being oxidized; through the heating device of the utility model, the aluminum strip is in a high-temperature semi-liquid state, and the steel strip has sufficient heat, so that the composite interface of steel and aluminum is stable, the composite strength is large, and it is not easy to delaminate. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the steel-aluminum composite heating device of the utility model.
[0025] Among them, 1. aluminum strip heating chamber; 11. first heating unit; 12. aluminum strip inlet; 121. first graphite block; 122. second graphite block; 123. first arc surface; 124. second arc surface; 13. aluminum strip outlet; 131. third graphite block; 132. fourth graphite block; 133. third arc surface; 134. fourth arc surface; 2. steel strip heating chamber; 21. second heating unit; 22. steel strip inlet; 221. fifth graphite block; 222. sixth graphite block; 223. fifth arc surface; 224. sixth arc surface; 23. steel strip outlet; 231. seventh graphite block; 232. eighth graphite block; 233. seventh arc surface; 234. eighth arc surface; 3. aluminum strip; 4. steel strip. DETAILED DESCRIPTION
[0026] The technical solution of the present invention will be described in detail below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art fall within the scope defined by the claims attached to this application.
[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" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0028] Example 1
[0029] Steel-aluminum composite heating device, see Figure 1, including an aluminum strip heating chamber 1 and a steel strip heating chamber 2 which are distributed up and down, the aluminum strip 3 is heated by the aluminum strip heating chamber 1, and the steel strip 4 is heated by the steel strip heating chamber 2, and hot rolling is performed after the heating is completed. In view of the small unwinding tension of the aluminum strip 3, the aluminum strip heating chamber 1 is arranged above the steel strip heating chamber 2 for easy unwinding; in order to make the aluminum strip 3 and the steel strip 4 heated evenly and fully, the length of the aluminum strip heating chamber is 20m-40m, the temperature of the aluminum strip heating chamber is 270℃-430℃, the aluminum strip is heated to a high-temperature semi-liquid state, the length of the steel strip heating chamber is 20m-40m, the temperature of the steel strip heating chamber is 350℃-680℃, and the steel strip is heated to a sufficiently hot state; a first heating unit 11 is arranged in the aluminum strip heating chamber 1 and is filled with reducing gas, and the first heating unit 11 is an electromagnetic heating unit or a resistance heating unit The reducing gas is a mixed gas of nitrogen and hydrogen, wherein the proportion of hydrogen is 2%-6%. The aluminum strip heating chamber 1 is under positive pressure, and the air pressure in the aluminum strip heating chamber 1 is 10Pa-30Pa higher than the external air pressure. The positive pressure requires that the input amount of the reducing gas is slightly larger than the leakage amount. An aluminum strip inlet 12 and an aluminum strip outlet 13 are respectively arranged at both ends of the aluminum strip heating chamber 1; a second heating unit 21 is arranged in the steel strip heating chamber 2 and is filled with reducing gas. The second heating unit 21 is an electromagnetic heating unit or a resistance heating unit. The reducing gas is a mixed gas of nitrogen and hydrogen, wherein the proportion of hydrogen is 2%-6%. The steel strip heating chamber 2 is under positive pressure, and the air pressure in the steel strip heating chamber 2 is 10Pa-30Pa higher than the external air pressure. A steel strip inlet 22 and a steel strip outlet 23 are respectively arranged at both ends of the steel strip heating chamber 2.
[0030] See also Figure 1In order to reduce the leakage of reducing gas, the heights of the aluminum strip inlet 12 and the aluminum strip outlet 13 are both 2mm-8mm, the aluminum strip 3 passes through a gap with a height of 2mm-8mm, and the gap height is slightly greater than the thickness of the aluminum strip 3, and the heights of the steel strip inlet 22 and the steel strip outlet 23 are both 4mm-12mm, the steel strip 4 passes through a gap with a height of 4mm-12mm, and the gap height is slightly greater than the thickness of the steel strip 4. In order to reduce the leakage of reducing gas and facilitate the threading, the first graphite block 121 and the second graphite block 122 are respectively arranged on the upper and lower sides of the aluminum strip inlet 12, and the third graphite block 131 and the fourth graphite block 132 are respectively arranged on the upper and lower sides of the aluminum strip outlet 13. The first graphite block 121 is provided with a first curved surface 123, and the second graphite block 122 is provided with a second curved surface 124. The first curved surface 123 and the second curved surface 124 form a bell mouth. The third graphite block 131 is provided with a third curved surface 133, and the fourth graphite block 132 is provided with a fourth curved surface 134. The third curved surface 133 and the fourth curved surface 134 form a bell mouth. The aluminum strip 3 passes through the bell mouth, which is convenient and can reduce the leakage of reducing gas. Similarly, a fifth graphite block 221 and a sixth graphite block 222 are respectively arranged on the upper and lower sides of the steel strip inlet 22, and a seventh graphite block 231 and an eighth graphite block 232 are respectively arranged on the upper and lower sides of the steel strip outlet 23, the fifth graphite block 221 is provided with a fifth arc surface 223, the sixth graphite block 222 is provided with a sixth arc surface 224, the fifth arc surface 223 and the sixth arc surface 224 form a bell mouth, the seventh graphite block 231 is provided with a seventh arc surface 233, the eighth graphite block 232 is provided with an eighth arc surface 234, the seventh arc surface 233 and the eighth arc surface 234 form a bell mouth, and the steel strip 4 passes through the bell mouth, which is convenient and can reduce the leakage of reducing gas.
[0031] Through the above technical solution, the technical effects achieved by Example 1 are as follows:
[0032] (1) During the heating process, the aluminum strip heating chamber 1 and the steel strip heating chamber 2 are respectively filled with reducing gas and positive pressure to prevent the aluminum strip 3 and the steel strip 4 from being oxidized; through the heating device of Example 1, the aluminum strip 3 is in a high-temperature semi-liquid state, and the steel strip 4 has sufficient heat, so that the composite interface of steel and aluminum is stable, the composite strength is large, and it is not easy to delaminate.
[0033] (2) The aluminum belt 3 and the steel belt 4 are respectively inserted and exited through the bell mouth, which is convenient for threading and can reduce the leakage of reducing gas, thereby saving reducing gas.
Claims
1. Steel-aluminum composite heating device, characterized in that: It includes an aluminum strip heating chamber and a steel strip heating chamber which are distributed up and down; The aluminum strip heating chamber is provided with a first heating unit and is filled with reducing gas. The aluminum strip heating chamber is under positive pressure. An aluminum strip inlet and an aluminum strip outlet are provided at both ends of the aluminum strip heating chamber. A second heating unit is provided in the steel strip heating chamber and is filled with reducing gas. The steel strip heating chamber is under positive pressure. A steel strip inlet and a steel strip outlet are provided at both ends of the steel strip heating chamber.
2. The steel-aluminum composite heating device according to claim 1, characterized in that: The length of the aluminum strip heating chamber is 20m-40m, and the length of the steel strip heating chamber is 20m-40m.
3. The steel-aluminum composite heating device according to claim 1, characterized in that: The air pressure in the aluminum strip heating chamber is 10Pa-30Pa higher than the external air pressure, and the air pressure in the steel strip heating chamber is 10Pa-30Pa higher than the external air pressure.
4. The steel-aluminum composite heating device according to claim 1, characterized in that: The first heating unit is an electromagnetic heating unit or a resistance heating unit, and the second heating unit is an electromagnetic heating unit or a resistance heating unit.
5. The steel-aluminum composite heating device according to claim 1, characterized in that: The heights of the aluminum strip inlet and the aluminum strip outlet are both 2mm-8mm, and the heights of the steel strip inlet and the steel strip outlet are both 4mm-12mm.
6. The steel-aluminum composite heating device according to claim 1, characterized in that: The temperature of the aluminum strip heating chamber is 270°C-430°C, and the temperature of the steel strip heating chamber is 350°C-680°C.
7. The steel-aluminum composite heating device according to any one of claims 1 to 6, characterized in that: A first graphite block and a second graphite block are respectively arranged on the upper and lower sides of the aluminum strip inlet, and a third graphite block and a fourth graphite block are respectively arranged on the upper and lower sides of the aluminum strip outlet.
8. The steel-aluminum composite heating device according to claim 7, characterized in that: The first graphite block is provided with a first curved surface, the second graphite block is provided with a second curved surface, and the first curved surface and the second curved surface form a bell mouth; The third graphite block is provided with a third arc surface, the fourth graphite block is provided with a fourth arc surface, and the third arc surface and the fourth arc surface form a bell mouth.
9. The steel-aluminum composite heating device according to any one of claims 1 to 6, characterized in that: A fifth graphite block and a sixth graphite block are respectively arranged on the upper and lower sides of the steel strip inlet, and a seventh graphite block and an eighth graphite block are respectively arranged on the upper and lower sides of the steel strip outlet.
10. The steel-aluminum composite heating device according to claim 9, characterized in that: The fifth graphite block is provided with a fifth arc surface, the sixth graphite block is provided with a sixth arc surface, and the fifth arc surface and the sixth arc surface form a bell mouth; The seventh graphite block is provided with a seventh arc surface, the eighth graphite block is provided with an eighth arc surface, and the seventh arc surface and the eighth arc surface form a bell mouth.