An ultrathin high-performance 5G base station cooling plate and a manufacturing method thereof

Abstract

The application provides a kind of ultra-thin high-performance 5G base station cooling plate and its manufacturing method.The base plate component wt / % is:Si 0.1~0.2%, Fe 0.27~0.35%, Cu 0.5~0.6%, Mn 0.7~0.85%, Mg 0.05~0.15%, Ti 0.05~0.1%, Ni 0.03~0.07%, Cr 0.03~0.07%, the rest is Al;The runner plate component wt / % is:Si 0.1~0.15%, Fe 0.38~0.45%, Cu 0.08~0.12%, Ti 0.015~0.03%, the rest is Al.The process flow includes melting, homogenization annealing, roughing, nitrogen furnace annealing, thick shear cutting, twelve roll straightening, multi-stage polishing of pressing surface, runner plate spraying, drying, welding, preheating, low temperature warm rolling, continuous furnace annealing, blowing drum, shearing and stamping;Low-carbon short process casting and rolling+warm stacking process is used, the electrochemical potential of the composition is higher, and the corrosion resistance is obviously improved;The high-strength base plate is thinned by more than 20% to realize ultra-thin, while still having high flatness, easy to combine during stacking, low leakage rate during blowing, high and uniform surface hardness;High deformation resistance and burst pressure at room temperature, not easy to deform during high temperature baking.

Description

Technical Field

[0001] This article belongs to the technical field of heat exchanger cooling plates, specifically relating to an ultra-thin, high-performance 5G base station heat exchanger cooling plate and its manufacturing method. Background Technology

[0002] Since 2019, 5G technology has developed rapidly in China. As of the end of May 2022, 1.7 million 5G base stations had been built and put into operation nationwide, averaging more than 12 base stations per 10,000 people. 5G base stations introduce Massive MIMO technology, with a typical power consumption exceeding 3500W per base station, while 4G base stations mainly use 4T4R MIMO, with a typical power consumption of only around 1000W per base station. Because some of the electrical energy consumed during operation is converted into heat, the temperature inside the integrated base station cabinet continuously rises, significantly increasing the demand for heat dissipation. Inadequate AAU heat dissipation will lead to increased power consumption, posing a serious challenge to operators and a significant obstacle to the advancement of 5G construction. If the heat dissipation problem cannot be effectively solved, the deployment and long-term development of 5G will be negatively impacted.

[0003] Heat dissipation technologies have also evolved over time. Currently, the mainstream approach is through enclosed, natural heat dissipation products. The principle is that once the temperature stabilizes, all heat is first transferred to the outer casing, and then conducted to the air. From the casing's perspective, increased power consumption necessitates a more rational fin design to match the high power consumption of base stations. In terms of materials, lighter, thinner, stronger, more thermally conductive, and more corrosion-resistant materials are needed to support this technology, allowing two-phase flow products to be more widely used in base stations.

[0004] Current 5G base station cooling plates are mainly aluminum brazed composite plates. The substrate is primarily produced through semi-continuous casting and subsequent hot rolling, which has drawbacks such as high energy consumption, low yield, and long production processes. Furthermore, the aluminum alloy plates generally have low strength, requiring thicker specifications to compensate for performance deficiencies. The resulting thickness and weight of the cooling plates do not meet the requirements of lightweight, high heat transfer in new cooling plates, and they have been gradually phased out of the market. In addition, during use, numerous problems arise, including low performance leading to plate distortion and scrapping, poor forming uniformity causing stamping cracks, blow molding defects, low pressure resistance, low high-temperature resistance, and insufficient corrosion resistance and lifespan. Therefore, there is an urgent need to develop new high-performance alloyed plate materials through green, short-process, lower-carbon, and resource-saving production methods, and correspondingly develop ultra-thin, high-strength, and high-corrosion-resistant 5G cooling plate products to meet the demands of high-cooling applications in 5G in recent years. Summary of the Invention

[0005] To solve the above problems, the cooling plate is made by stacking and warm rolling the base plate and the flow channel plate, the total thickness is 0.6-0.8 mm, and the thickness ratio of the flow channel plate to the base plate is 2:3. The base plate has the following components (wt%): Si 0.1-0.2%, Fe 0.27-0.35%, Cu 0.5-0.6%, Mn 0.7-0.85%, Mg 0.05-0.15%, Zn <0.05%, Ti 0.05-0.1%, Ni 0.03-0.07%, Cr 0.03-0.07%, and the balance of Al. The flow channel plate has the following components (wt%): Si 0.1-0.15%, Fe 0.38-0.45%, Cu 0.08-0.12%, Ti 0.015-0.03%, and the balance of Al. In the application, the cooling base plate is in O state, the tensile strength is 135-160 MPa, the elongation is ≥20%, the surface hardness of the base plate is 35-45 HV, the surface hardness of the flow channel plate is 20 HV greater than that of the base plate, the burst pressure is greater than 4.5 MPa, the deformation pressure is greater than 2 MPa, and the base plate does not deform after being baked at 130°C for 0.5 h.

[0006] The application also provides a manufacturing method of the ultra-thin high-performance 5G base station cooling plate, which includes the following processes: melting and casting, homogenization annealing, rough and medium rolling, nitrogen furnace annealing, thick shearing and cutting, twelve-roller straightening, multi-stage polishing of the pressing surface, flow channel plate spraying, drying, welding, preheating, low-temperature warm rolling, continuous furnace annealing, air inflation and drum blowing, and shearing and stamping.

[0007] a. Melting and casting: the base plate and the flow channel plate are melted according to the components of the application, and then a Cu-containing cast-rolled high-alloy high-strength blank with a thickness of 8-9 mm is directly prepared by using an inclined continuous casting and rolling device, and the grain size is controlled to be 1 grade.

[0008] b. Homogenization annealing: temperature measurement is performed by using a high-temperature annealing furnace, the furnace gas is heated to full power, when the metal temperature reaches 585°C, the furnace gas temperature is changed to 590°C for 3-6 h, and then the furnace is discharged.

[0009] c. Rough and medium rolling: the base plate is cold-rolled to the finished product thickness specifications according to the following passes: 8-9 mm-6.8 mm-5.2 mm-4.0 mm-2.8 mm-1.8 mm-1.2±0.02 mm (oil control), and the flow channel plate is rolled to a thickness specification of 0.6±0.02 mm.

[0010] d. Nitrogen furnace annealing: the finished product is recrystallized annealed by using an N2 protection furnace, temperature measurement is performed, the furnace gas is heated to full power, the furnace gas temperature is 450°C for annealing, when the metal temperature reaches 375°C, the furnace gas temperature is changed to 380°C for 3-6 h, and then the furnace is discharged.

[0011] e. Thick shearing and cutting: the finished product is cut on a 1850 mm thick shearing machine according to the actual use width specifications, and the surface of the guide roller and the like needs to be cleaned with alcohol to ensure that there is no foreign matter and accumulated aluminum powder residue.

[0012] f, twelve-roller straightening; the substrate plate type is corrected through a 6+6 type straightening machine, and the flatness of the plate is improved.

[0013] g, multi-stage polishing of the pressing surface; the multi-stage polishing step of the pressing surface is carried out by using a three-stage polishing device of a grinding wheel + a steel brush + a sand belt to polish the Mg oxide layer in the outer layer to a light yellow color to eliminate the exposure of fresh metal.

[0014] h, flow channel plate spraying; graphite powder and other anti-rolling agents are sprayed on the surface of the flow channel plate, and trace boron nitride is added during spraying.

[0015] i, drying; the flow channel plate after spraying is subjected to low-temperature drying treatment at 80-100 DEG C;

[0016] j, welding; the flow channel plate and the substrate are stacked, and three points are spot welded at every group of piece width on both sides to pre-fix;

[0017] k, preheating; the stacked composite substrate is heated at 380-420 DEG C for 30 min;

[0018] l, low-temperature warm rolling; the total thickness of the stacked composite substrate is 1.4-1.8 mm, the rolling pass reduction is controlled to 50-65%, and the composite plate sheet is rolled to 0.6-0.8 mm ultra-thin thickness;

[0019] m, continuous furnace annealing; the continuous furnace annealing adopts an annealing furnace gas temperature of 400-420 DEG C;

[0020] n, blowing; the flow channel inlet of the flow channel plate is subjected to inflation treatment, nitrogen is used for pressure blowing until the flow channel is fully inflated;

[0021] o, shearing and stamping; the edge of the cooled plate after blowing is cut according to the size requirement and is subjected to flanging, punching and manufacturing.

[0022] Beneficial effects:

[0023] The 5G ultra-thin high-performance cooling plate of the application replaces the traditional semi-continuous ingot casting + hot rolling + hot stacking process by using a low-carbon green short-process continuous casting + warm stacking process, and avoids the shortcomings of high energy consumption, low yield and long production process.

[0024] Through the new high-copper high-manganese magnesium-containing high-alloying component design, the plate has a higher electrochemical potential, which is 70-120 mV / SCE higher than that of a conventional 3003 substrate, the salt spray simulation corrosion test shows that the corrosion pitting occurrence rate is reduced, the corrosion is more inclined to horizontal peeling corrosion compared with the direct longitudinal penetration after conventional pitting corrosion, and the corrosion penetration time is delayed by 9-15 days.

[0025] Meanwhile, the high-alloyed component design ensures high strength of the substrate, the tensile strength reaches 135-160 Mpa, and the elongation is greater than or equal to 20%, the higher tensile strength is sufficient to support the thickness reduction of more than 20% to realize ultra-thinning; through the process design of high-temperature casting and rolling blank homogenization annealing, the segregation and non-equilibrium solidification phase in the microstructure of the cast and rolled high-alloy blank can be fully dissolved and the microstructure and composition can be homogenized, the surface hardness of the substrate is 35-45 HV, the surface hardness of the runner plate is greater than the substrate by 20 HV, and the range of hardness values in each region is less than 1.5 HV, the surface hardness uniformity is much higher than that of hot-rolled materials, which ensures that the problems such as local orange peel cracking caused by uneven microstructure and performance in the subsequent deformation process do not occur;

[0026] The high strength of the cooling plate also ensures its excellent plate type and pressure resistance after rolling, the pressure combined surface is easy to combine during laminating, the leakage rate during blowing is 8-13% lower than that of conventional hot-rolled composite materials, the blasting pressure of the finished product is greater than 4.5 MPa, and the deformation pressure is greater than 2 MPa, completely avoiding defects such as distortion during use; due to the addition of elements such as Mg, Cr and Ni in the component design, under high temperature conditions, submicron-sized precipitated phases can be precipitated to pin the grain boundaries and dislocations, which is beneficial to improve the high-temperature performance of the material. The plate material does not deform after being baked at 130℃ for 0.5h, and can completely meet the actual application environment requirements of 5G. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A flow chart of a manufacturing method of an ultra-thin high-performance 5G base station cooling plate. DETAILED DESCRIPTION

[0028] In order to deepen the understanding of the present application, the present application will be further described in detail below in combination with examples and drawings, which are only used to explain the present application and do not constitute a limitation on the protection scope of the present application.

[0029] Example 1

[0030] An ultra-thin high-performance 5G base station cooling plate is produced according to the following steps:

[0031] Melting and casting: the corresponding substrate and runner plate are melted according to the component of the present application, the substrate component wt / % is: Si 0.152%, Fe 0.335%, Cu 0.56%, Mn 0.83%, Mg 0.12%, Ti 0.065%, Ni 0.048%, Cr 0.05%, and the balance is Al; the runner plate component wt / % is: Si 0.12%, Fe 0.41%, Cu 0.1%, Ti 0.018%, and the balance is Al. Then, a Cu-containing cast and rolled high-alloyed high-strength blank with a thickness of 8.7mm is directly prepared by an inclined continuous casting and rolling equipment, and the grain size is controlled to be 1 level.

[0032] Homogenization annealing: high temperature annealing furnace temperature production, furnace gas full power temperature, to the metal temperature reaches 585 ℃, change furnace gas temperature to 590 ℃ for 5h out of furnace.

[0033] Roughing: according to the following pass to cold rolling to finished thickness specification, base plate: 8.7mm-6.8mm-5.2mm-4.0mm-2.8mm-1.8mm-1.2 ±0.02 mm (oil control), flow channel plate rolling to 0.6 ±0.02 mm thickness specification.

[0034] Nitrogen furnace annealing: using N2 protection furnace for finished product recrystallization annealing, temperature measurement production, furnace gas full power temperature, to the furnace gas temperature 450 ℃, heat preservation, when the metal temperature reaches 375 ℃, change furnace gas temperature to 380 ℃ for 3h out of furnace.

[0035] Thick shear cutting: according to the actual use of width specification in 1850mm thick shear machine for finished product cutting, before cutting the surface of the guide roller needs to be cleaned with alcohol to ensure that there is no foreign matter and accumulation of aluminum powder residue.

[0036] Twelve roll straightening: through 6+6 type straightening machine for base plate type correction, improve the flatness of the plate.

[0037] Multi-stage polishing of the pressing surface: multi-stage polishing steps of the pressing surface, using three-stage polishing device of grinding wheel + steel brush + abrasive belt for polishing, polishing to the outer layer of light yellow Mg oxide layer to eliminate the fresh metal.

[0038] Flow channel plate spraying: spraying graphite powder and other anti-rack agents on the surface of the flow channel plate, adding trace boron nitride during spraying.

[0039] Drying: drying the flow channel plate at low temperature of 80-100℃ after spraying;

[0040] Welding: stacking the flow channel plate and the base plate, and spot welding three places every group of sheet width on both sides for pre-fixing;

[0041] Preheating: heating the stacked composite base plate at 390℃ for 30min;

[0042] Low temperature warm rolling: the total thickness of the stacked composite base plate is 1.6mm, the rolling reduction is controlled at 50%, and the composite plate sheet is rolled to 0.8mm ultra-thin thickness;

[0043] Continuous furnace annealing: the annealing furnace gas temperature is 415℃.

[0044] Air blowing: expanding the inlet of the flow channel, and using nitrogen to press and blow until the flow channel is fully inflated;

[0045] Shearing and stamping: The edges of the cooling plate after air blowing are cut according to the size requirements and then flanged, stamped and punched.

[0046] The ultra-thin, high-performance 5G base station cooling plate produced by this method replaces the traditional semi-continuous casting + hot rolling + hot slab rolling process with a low-carbon, green, and short-process continuous casting and rolling + warm slab rolling process. This avoids the high energy consumption of two high-temperature hot rolling processes, reduces the significant process losses from sawing the ingot head and tail and surface milling, and greatly shortens the production process by approximately 13 days. The cooling plate thickness is far lower than the current minimum thickness of 1.2mm for conventional liquid cooling plates, reaching an ultra-thin thickness of 0.8mm. The tensile strength reaches 156MPa, and the elongation is 21.1%. The electrochemical potential is 625mV / SCE, and the SWAAT simulated seawater salt spray corrosion penetration time is 32 days, which is excellent. It is produced in 12 days from conventional hot-rolled 3003 steel sheets; it has good shape and pressure resistance, and the pressing surfaces are easy to bond during stacking. The printing omission rate during blow molding is 9.3% lower than that of conventional hot-rolled composite materials. The finished product has a burst pressure of 4.75MPa and a deformation pressure of 2.3MPa in the pressure test. No substrate twisting defects were found after pressure testing. The surface hardness of the substrate is tested to be 43HV, and the surface hardness of the flow channel plate is 23HV. The hardness difference between the upper and lower surfaces is less than 1.5HV. The surface hardness uniformity is much higher than that of hot-rolled materials. No problems such as local orange peel cracking occurred during stamping. It does not deform after baking at 130℃ for 0.5h and can be fully adapted to the requirements of 5G practical application environment.

[0047] Example 2

[0048] An ultra-thin, high-performance 5G base station cooling plate is manufactured according to the following steps:

[0049] Melting and casting: The substrate and flow channel plate are melted according to the composition of this invention. The substrate composition (wt / %) is: Si 0.141%, Fe 0.311%, Cu 0.51%, Mn 0.72%, Mg 0.09%, Ti 0.055%, Ni 0.053%, Cr 0.04%, with the balance being Al; the flow channel plate composition (wt / %) is: Si 0.13%, Fe 0.39%, Cu 0.09%, Ti 0.020%, with the balance being Al. Then, a Cu-containing high-alloy high-strength billet with a thickness of 8.2 mm is directly produced using an inclined continuous casting and rolling equipment, with the grain size controlled at level 1.

[0050] Homogenization annealing: High-temperature annealing furnace is used for production. The furnace gas is heated to full power until the metal temperature reaches 585℃. Then the furnace gas temperature is reduced to 590℃ and held for 3 hours before being removed from the furnace.

[0051] Roughing and intermediate rolling: Cold rolling is performed in the following passes to the finished thickness specifications, substrate: 8.2mm—6.8mm—5.2mm—4.0mm—2.8mm—1.8mm—1.2mm ±0.02 mm (oil control), flow channel plate rolled to 0.6 mm.±0.02 mm thickness specification.

[0052] Nitrogen furnace annealing: product recrystallization annealing is carried out in a N2 protection furnace, temperature measurement production, furnace gas full power heating, to the furnace gas temperature 450℃, heat preservation, when the metal temperature reaches 375℃, change the furnace gas temperature to 380℃, heat preservation for 4h, and then take out the furnace.

[0053] Thick shearing: according to the actual use width specification, the finished product is cut on the 1850mm thick shearing machine. Before cutting, the surface of the guide roller needs to be wiped with alcohol to ensure that there is no foreign matter and accumulated aluminum powder residue.

[0054] Twelve roller straightening: the substrate plate type is corrected through a 6+6 type straightening machine to improve the flatness of the plate surface.

[0055] Multi-stage polishing of the pressing surface: the pressing surface is polished by a three-stage polishing device of grinding wheel+steel brush+sand belt. The polishing is performed until the outer layer of light yellow Mg oxide layer is eliminated to expose fresh metal.

[0056] Flow channel plate spraying: graphite powder and other anti-rolling agents are sprayed on the surface of the flow channel plate. Trace boron nitride is added during spraying.

[0057] Drying: the flow channel plate after spraying is subjected to low temperature drying treatment at 80-100℃;

[0058] Welding: the flow channel plate and the substrate are stacked, and three points are spot welded on every group of sheet width on both sides for pre-fixing;

[0059] Preheating: the stacked composite substrate is heated at 415℃ for 30min;

[0060] Low temperature warm rolling: the total thickness of the stacked composite substrate is 1.6mm, and the rolling pass reduction is controlled at 64%. The composite plate sheet is rolled to a thickness of 0.65mm.

[0061] Continuous furnace annealing: the annealing furnace gas temperature is 405℃.

[0062] Inflation and blowing: inflation treatment is carried out at the flow channel inlet, and nitrogen is used for pressure blowing until the flow channel is fully inflated.

[0063] Shearing and stamping: the edge of the cooled plate is cut according to the size requirements and edge turning, punching and manufacturing after inflation and blowing.

[0064] The ultra-thin high-performance 5G base station cooling plate prepared by the case method is prepared by a low-carbon green short-process continuous casting and rolling + warm stacking process instead of a traditional semi-continuous ingot casting + hot rolling + hot stacking process, avoids high energy consumption in two high-temperature hot rolling, reduces the process loss of sawing and surface milling of the head and tail of the ingot, and greatly shortens the production process by about 10 days; the thickness of the cooling plate is far lower than the thinnest level of 1.2 mm of the current conventional liquid cooling plate, reaches an ultra-thin thickness of 0.6 mm, the tensile strength reaches 148 MPa, the elongation rate is 23.5%, the electrochemical potential is 655 mV / SCE, the SWAAT simulated seawater salt spray corrosion penetration time is 29 days, which is better than that of the conventional hot-rolled 3003 plate of 9 days; the plate type and pressure resistance are good, the stacking pressure surface is easy to combine, the leakage rate during blowing is 8.3% lower than that of the conventional hot-rolled composite material, the finished product pressure test burst pressure is 4.62 MPa, the deformation pressure is 2.4 MPa, and no base plate distortion defect is found after pressure; the surface hardness of the base plate is 42 HV, the surface hardness of the runner plate is 22 HV, and the upper and lower area hardness value difference is less than 1.5 HV, the surface hardness uniformity is much higher than that of the hot-rolled material, and no local orange peel cracking occurs during stamping; no deformation occurs at 130°C high temperature baking for 0.5h, and it can completely meet the actual application environment requirements of 5G.

[0065] Comparative case 1:

[0066] The conventional 3003 composite 1060 alloy water cooling plate produced by the conventional semi-continuous casting and rolling method + hot rolling method + hot stacking method is selected, the finished product thickness specification is 1.2 mm, the state is O state, and the similar finished product is obtained by the steps of melting, sawing, milling, homogenizing annealing, preheating, hot rolling, rough rolling breakdown, medium rolling, finished product annealing, edge cutting, coating, double-layer plate fixing, high-temperature hot stacking, continuous furnace annealing, air blowing, shearing and stamping. The energy consumption of two high-temperature hot rolling is high, there is a huge process loss of sawing and surface milling of the head and tail of the ingot, and the production process is about 42 days; the liquid cooling plate is 1.2 mm, the tensile strength reaches 132 MPa, the elongation rate is 32.5%, the electrochemical potential is 690 mV / SCE, and the SWAAT simulated seawater salt spray corrosion penetration time is only 20 days; the plate type and pressure resistance are good, the stacking pressure surface is easy to combine, the leakage rate during blowing is higher, the finished product pressure test burst pressure is 4.13 MPa, the deformation pressure is 1.88 MPa, and one third of the base plate has a distortion defect after pressure; the surface hardness of the base plate is 36 HV, the surface hardness of the runner plate is 19.8 HV, and the upper and lower area hardness value difference is higher than 3 HV, the surface hardness uniformity is poor, and frequent cracking occurs during stamping; deformation occurs at 130°C high temperature baking for 0.5h.

[0067] As can be seen from the above implementation cases, under the alloy composition and process flow of the present application, according to the production of implementation cases 1 and 2, the 5G ultra-thin high-performance cooling plate of the present application replaces the traditional semi-continuous ingot casting + hot rolling + hot laminating process with a low-carbon green short process continuous casting and rolling + warm laminating process, avoiding the shortcomings of high energy consumption, low yield, and long production process; through the new high-copper high-manganese magnesium-containing high-alloying composition design, the plate has a higher electrochemical potential, which is 70-120 mV / SCE higher than that of the conventional 3003 substrate, the salt spray simulation corrosion test shows that the corrosion pitting occurrence rate is reduced, and the corrosion is more inclined to horizontal peeling corrosion compared with the direct longitudinal penetration after conventional pitting corrosion, and the corrosion penetration time is delayed by 9-15 days; at the same time, the high-alloying composition design ensures the high strength of the substrate, the tensile strength reaches 135-160 Mpa, and the elongation is greater than or equal to 20%, the higher tensile strength is sufficient to support the thickness reduction of more than 20% to realize ultra-thin; through the process design of high-temperature casting and rolling blank homogenization annealing, the segregation and non-equilibrium solidification phase in the casting and rolling high-alloy blank can be fully dissolved and the structure and composition can be homogenized, the test shows that the surface hardness of the substrate is 35-45 HV, the surface hardness of the runner plate is greater than that of the substrate by 20 HV, and the range of hardness values in each region is less than 1.5 HV, the surface hardness uniformity is much higher than that of hot-rolled materials, which ensures that the problems such as local orange peel cracking caused by uneven structure and performance in the subsequent deformation process do not occur; the high strength of the cooling plate also ensures its excellent pattern and pressure resistance after rolling, the pressing surface is easy to combine during laminating, and the leakage rate during blowing is 8-13% lower than that of conventional hot-rolled composite materials, the finished product pressure test burst pressure is greater than 4.5 MPa, and the deformation pressure is greater than 2 MPa, completely avoiding defects such as distortion during use; due to the addition of elements such as Mg, Cr and Ni in the composition design, under high temperature conditions, submicron-sized precipitates can be precipitated to pin the grain boundaries and dislocations, which is beneficial to improve the high temperature resistance of the material, the plate of the present application does not deform at 130℃ high temperature baking for 0.5h, and can completely meet the actual application environment requirements of 5G.

[0068] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An ultra-thin high-performance 5G base station cooling plate, the cooling plate comprising a base plate and a flow channel plate connected in a laminated manner, characterized in that, The aluminum composition of the substrate is: Si 0.1-0.2%, Fe 0.27-0.35%, Cu 0.5-0.6%, Mn 0.7-0.85%, Mg 0.05-0.15%, Ti 0.05-0.1%, Ni 0.03-0.07%, Cr 0.03-0.07%, wt / %, with the balance being Al; the aluminum composition of the flow channel plate is: Si 0.1-0.15%, Fe 0.38-0.45%, Cu 0.08-0.12%, Mn < 0.01%, Mg < 0.01%, Zn < 0.03%, Ti 0.015-0.03%, wt / %, with the balance being Al.

2. The ultra-thin high-performance 5G base station cooling plate according to claim 1, characterized in that, The total thickness of the cooling plate is 0.6-0.8 mm, and the ratio of the thickness of the flow channel plate to the substrate is 2:

3.

3. The ultra-thin high-performance 5G base station cooling plate according to claim 1, characterized in that, The substrate is in the O state, with a tensile strength of 135-160 MPa, an elongation of ≥20%, a surface hardness of 35-45 HV, and a surface hardness of the flow channel plate that is 20 HV greater than that of the substrate; the burst pressure is greater than 4.5 MPa, the deformation pressure is greater than 2 MPa, and it does not deform after being baked at 130℃ for 0.5 hours.

4. A manufacturing method of an ultra-thin high-performance 5G base station cooling plate, characterized by, The specific steps are as follows; a. Melting and casting; Melting the substrate and flow channel plate according to the composition of the substrate and flow channel plate as described in claim 1, and then directly producing a Cu-containing high-alloy high-strength billet with a thickness of 8-9 mm using an inclined continuous casting and rolling equipment, controlling the grain size to level 1. b. Homogenization annealing: High-temperature annealing furnace is used for production. The furnace gas is heated at full power until the metal temperature reaches 585℃. Then the furnace gas temperature is changed to 590℃ and held for 3-6 hours before being unloaded. c. Roughing and intermediate rolling: Cold rolling is performed in the following passes to the finished thickness specifications: base plate: 8~9mm—6.8mm—5.2mm—4.0mm—2.8mm—1.8mm—1.2±0.02mm, and the runner plate is rolled to a thickness specification of 0.6±0.02mm. d. Nitrogen furnace annealing: The finished product is recrystallized and annealed using an N2 protective furnace. Temperature measurement is used in production. The furnace gas is heated to full power and held at 450°C. When the metal temperature reaches 375°C, the furnace gas temperature is changed to 380°C and held for 3-6 hours before being unloaded. e. Thick shearing and slitting: The finished product is slitting on an 1850mm thick shearing machine according to the actual width specifications. Before slitting, the surfaces of the guide rollers and other surfaces need to be wiped with alcohol to ensure that there are no foreign objects or accumulated aluminum powder residues. f. Twelve-roll straightening; A 6+6 type straightening machine is used to straighten the substrate shape and improve the flatness of the substrate surface. g. Multi-stage grinding of the bonding surface: The multi-stage grinding of the bonding surface is carried out by using a three-stage grinding device of grinding wheel + steel brush + sanding belt until the outer light yellow Mg oxide layer is removed and the fresh metal is exposed. h. Flow channel plate spraying: Spray graphite powder and other rolling resistance agents onto the surface of the flow channel plate, and add a trace amount of boron nitride during spraying. i. Drying; After the spraying is completed, the flow channel plate is dried at a low temperature of 80-100℃. j. Welding: Stack the flow channel plate and the base plate together, and spot weld three points on both sides at intervals of one sheet width for pre-fixation; k. Preheating: Heat the laminated composite substrate at 380–420℃ for 30 minutes; l, low temperature warm rolling; the total thickness of the laminated composite substrate is 1.4-1.8 mm, one-pass reduction is controlled to be 50-65%, and the laminated composite substrate is rolled to a thickness of 0.6-0.8 mm; m, continuous furnace annealing; the annealing furnace gas temperature is 400-420℃; n, inflation and blowing; the inflation and blowing is performed at the inlet of the flow channel of the flow channel plate, nitrogen is used for inflation and blowing until the flow channel is fully inflated; o, shearing and stamping; the edge of the flow channel plate after inflation and blowing is sheared according to the size requirement and is subjected to flanging, stamping and punching.

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