6-series aluminum alloy water-cooling disc and manufacturing method thereof

Abstract

The invention discloses a 6-series aluminum alloy water-cooling disc and a manufacturing method thereof, the 6-series aluminum alloy water-cooling disc comprises a 6-series aluminum alloy water-cooling disc main body piece and a 5-series aluminum alloy water channel cover plate, a water channel is arranged on the water-cooling disc main body piece, a to-be-welded interface is arranged on the water channel, and the 5-series aluminum alloy water channel cover plate is arranged on the to-be-welded interface. And the 5-series aluminum alloy water channel cover plate covers the water channel and is welded with the interface to be welded into a whole through vacuum electron beams. According to the 6-series aluminum alloy water-cooling disc and the manufacturing method thereof, the 5-series aluminum alloy or 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water-cooling disc main body piece are directly welded through vacuum electron beams under the condition of not using additional filling soldering lugs, so that crystal cracks of welding seams are effectively inhibited, and the service life of the 6-series aluminum alloy water-cooling disc is prolonged. The 6-series aluminum alloy water-cooling disc manufactured through vacuum electron beam direct welding has qualified weld joints without cracks and air holes, and the risk of generating weld joint nail point defects is effectively reduced. And meanwhile, the pre-welding assembly process is simplified, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of water cooling plate technology, specifically to a 6-series aluminum alloy water cooling plate and its manufacturing method. Background Technology

[0002] Aluminum alloys have many advantages, such as low density, excellent mechanical properties, good processing performance and corrosion resistance, and are increasingly used in semiconductor equipment, defense industry, aerospace and other fields.

[0003] Among them, 6061 aluminum alloy, as a medium-strength heat-treatable aluminum alloy, possesses excellent machinability and hot working properties compared to other aluminum alloys. Furthermore, its strength and toughness are well-matched, and it exhibits excellent corrosion resistance and thermal conductivity, making 6061 aluminum alloy one of the most widely used aluminum alloy grades in industrial production. In the semiconductor equipment manufacturing industry, 6061 aluminum alloy is widely used in the manufacture of vacuum chamber cooling and heat dissipation components. To improve heat dissipation and cooling efficiency, equipment components typically require the addition of cooling water channel structures, such as... Figure 1 The water-cooled plate component shown has a complex cooling water channel trajectory and requires a large penetration depth, as well as high requirements for the cleanliness of the weld.

[0004] There are currently four main technical methods for welding aluminum alloys: (1) Argon arc welding (TIG / MIG) is used to weld the water channel cover and main body of the water cooling plate. Argon arc welding refers to welding under the protection of inert gas (argon) and using tungsten electrode (TIG) or welding wire itself (MIG) as the electrode to generate an arc. However, due to the concentrated arc and high heat input of argon arc welding, it is easy to cause local high temperature, resulting in deformation of parts (especially thin-walled or precision water channel structures), requiring additional straightening process. In addition, argon arc welding has a small penetration depth (less than 2mm for a single layer) and a wide weld (more than 6mm), which cannot meet the high-precision processing requirements of water cooling plates with large penetration depth and dense water channels. Furthermore, the sub-components need to be machined with a bevel structure before welding, which increases the processing difficulty.

[0005] (2) Laser welding (LBW): Laser welding is a welding method that uses a high-energy-density laser beam to irradiate the workpiece, causing the material to melt and form a weld. However, since aluminum alloys are highly reflective materials, they have a high reflectivity to lasers (especially lasers with wavelengths around 1 μm), requiring high power to initiate deep penetration welding. The welding process is prone to producing process porosity (due to the instability of pinholes) and metallurgical porosity, requiring extremely high standards for pre-welding cleaning and process parameter stability. Furthermore, the welding process takes place in an atmospheric environment, making it impossible to avoid oxidation of the welded parts and porosity caused by hydrogen absorption.

[0006] (3) Friction stir welding (FSW) refers to the use of a high-speed rotating stirring head to penetrate the butt joint of the workpiece. Through the frictional heat and intense plastic deformation between the stirring head shoulder and the workpiece, the materials achieve metallurgical bonding in a solid state below the melting point. However, when this welding method is completed, the stirring head will leave an unfilled hole (keyhole) after it is withdrawn. It is usually only suitable for butt and lap welds of straight lines or regular arcs. For complex waterway structures with three-dimensional curves and multiple intersections in space, the accessibility and movement trajectory of the stirring head become the main obstacles, and its flexibility is far inferior to that of fusion welding.

[0007] (4) Vacuum electron beam welding (EBW), through a high-precision CNC system, can meet the welding requirements of dense and complex trajectories, and the heat input can be quantitatively controlled, making it suitable for batch welding. Furthermore, it can operate in high vacuum (e.g., 10⁻⁻¹). 5 Welding is performed in an environment with atmospheric pollution (Pa), fundamentally avoiding metallurgical defects such as hydrogen porosity and oxide inclusions caused by atmospheric pollution, resulting in high weld purity. In summary, vacuum electron beam welding (EBW) can meet various requirements for welding cooling channels in aluminum alloy water-cooled plates. However, since 6061 is an Al-Mg-Si aluminum alloy containing Mg and Si elements, low-melting-point eutectics such as Al-Si or Mg2Si will form at the columnar crystal boundaries during weld metal crystallization. These liquid films cannot withstand the shrinkage stress during the welding process at the end of solidification (solid-liquid coexistence zone), easily leading to weld crystallization cracks.

[0008] Studies have shown that in aluminum alloy electron beam welds, crack defects are most likely to occur when the silicon content is around 1%. As the silicon content increases, the crack sensitivity of the weld decreases until cracks can be eliminated. This is because silicon can form a certain amount of Al-Si low-melting-point eutectic with aluminum, filling the grain boundary gaps and playing a "healing" role. This increases the fluidity of the liquid metal during solidification, thereby compensating for shrinkage stress.

[0009] The existing method for manufacturing 6-series aluminum alloy water cooling plates involves inserting 4-series aluminum alloy welding sheets between the water channel cover and the main body before welding. Figure 2 , Figure 3 As shown, by adding an Al-Si alloy (4-series, typically AlSi7, containing approximately 7% silicon) as an intermediate layer or weld spatter during welding, the overall silicon content in the molten pool can be significantly increased. This has two advantages: first, it dilutes the concentration of crack-promoting phases such as Mg2Si in the weld; second, it introduces a large amount of beneficial Al-Si eutectic structure, utilizing the good fluidity of the Al-Si eutectic to "heal" potential cracks.

[0010] However, the process of loading welding pieces before welding also has many problems in actual production. (1) For water-cooled plate structures with long welds and complex two-dimensional trajectory characteristics, the assembly gap between the water channel cover and the main body is required to be uniform, which puts a demanding requirement on machining. (2) Manually loading welding pieces requires a lot of time. According to statistics, the loading of welding pieces takes up 25% to 35% of the total time, which increases the time cost. (3) The purchase, processing and cleaning of welding pieces will increase the welding cost. Summary of the Invention

[0011] The purpose of this invention is to solve the problem of easy crystallization cracks in the weld seam during electron beam welding of 6-series aluminum alloy water cooling plates and the problems of time-consuming and costly loading of filler sheets in the existing process. The invention provides a 6-series aluminum alloy water cooling plate and its manufacturing method, which can effectively suppress weld crystallization cracks without the use of additional filler sheets, while simplifying the pre-welding assembly process, improving production efficiency and reducing production costs.

[0012] The technical solution adopted by this invention to achieve its objective is as follows: a 6-series aluminum alloy water-cooling plate, comprising a 6-series aluminum alloy water-cooling plate body and a 5-series aluminum alloy water channel cover plate. Water channels are provided on the water channels, and a welding interface is provided on the water channels. The 5-series aluminum alloy water channel cover plate is fitted onto the water channels and welded integrally with the welding interface using a vacuum electron beam. This 6-series aluminum alloy water-cooling plate achieves direct welding of the 5-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water-cooling plate body using a vacuum electron beam without the use of additional filler solder pads. Vacuum electron beam welding solves the problem of fabricating water-cooled plate structures with long welds and complex two-dimensional trajectories. Both Al-Mg and Al-Mg-Si alloys contain magnesium (Mg) as a major alloying element. Their differences in melting point, coefficient of thermal expansion, and other physical properties result in relatively small thermal stresses during welding, reducing mechanical factors and effectively suppressing weld crystallization cracks. Al-Mg water-cooled plates fabricated by direct vacuum electron beam welding produce qualified welds free of cracks and porosity, effectively reducing the risk of weld stud defects. Simultaneously, it simplifies pre-welding assembly processes, improves production efficiency, and reduces production costs.

[0013] Preferably, the 5-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate body are welded together with a penetration depth of 6-10 mm.

[0014] Preferably, the main body of the 6-series aluminum alloy water cooling plate is made of 6061 aluminum alloy, 6005 aluminum alloy, or 6063 aluminum alloy.

[0015] Preferably, the 5-series aluminum alloy waterway cover is made of 5052 aluminum alloy or 5083 aluminum alloy.

[0016] The technical solution adopted by this invention to achieve its second objective is: a method for manufacturing a 6-series aluminum alloy water-cooling plate, comprising the following steps: S1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water channels on the main body of the water cooling plate. Set the interface to be welded on the water channel 4. S2: Select 5-series aluminum alloy to make waterway covers that match the shape of the waterway; S3: Place the 5-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 5-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate main body with a penetration depth of 6~10mm using a vacuum electron beam. Among them, vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA; S4: A 6-series aluminum alloy water cooling plate was produced.

[0017] The manufacturing method of this 6-series aluminum alloy water-cooling plate involves directly welding the 5-series aluminum alloy water channel cover and the 6-series aluminum alloy water-cooling plate body using a vacuum electron beam without the use of additional filler metal. This method solves the problem of manufacturing water-cooling plate structures with long welds and complex two-dimensional trajectory characteristics, effectively suppressing weld crystallization cracks. The 6-series aluminum alloy water-cooling plate manufactured by direct vacuum electron beam welding has qualified welds without cracks or porosity, and effectively reduces the risk of weld spike defects. It also simplifies the pre-welding assembly process, improves production efficiency, and reduces production costs.

[0018] Another technical solution adopted by this invention to achieve its first objective is: a 6-series aluminum alloy water-cooling plate, comprising a 6-series aluminum alloy water-cooling plate body and a 3-series aluminum alloy water channel cover. Water channels are provided on the water-cooling plate body, and a welding interface is provided on the water channels. The 3-series aluminum alloy water channel cover is fitted onto the water channels and welded integrally with the welding interface using vacuum electron beam welding. In this 6-series aluminum alloy water-cooling plate, the water channel cover is made of 3-series aluminum alloy, which has similar physical properties to 6-series aluminum alloy and optimizes the weld chemical composition to avoid cracking. The 3-series aluminum alloy water channel cover and the 6-series aluminum alloy water-cooling plate body are directly welded using vacuum electron beam welding. This effectively suppresses weld crystallization cracks. The 6-series aluminum alloy water-cooling plate manufactured by direct vacuum electron beam welding has a qualified weld without cracks or porosity, and effectively reduces the risk of weld spike defects. It also simplifies the pre-welding assembly process, improves production efficiency, and reduces production costs.

[0019] Preferably, a welded structure with a penetration depth of 6-10 mm is formed between the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate body.

[0020] Preferably, the main body of the 6-series aluminum alloy water cooling plate is made of 6061 aluminum alloy, 6005 aluminum alloy, or 6063 aluminum alloy.

[0021] Preferably, the 3-series aluminum alloy waterway cover is made of 3003 aluminum alloy.

[0022] Another technical solution adopted by the present invention to achieve its second objective is: a method for manufacturing a 6-series aluminum alloy water-cooling plate, comprising the following steps: S1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water 4 on the main body of the water cooling plate, and set the interface to be welded on the water channel; S2: Select 3-series aluminum alloy material to make waterway covers that match the shape of the waterway; S3: Place the 3-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate body with a penetration depth of 6~10mm using a vacuum electron beam. Among them, vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA; S4: A 6-series aluminum alloy water cooling plate was produced.

[0023] The method for manufacturing this 6-series aluminum alloy water-cooling plate involves directly welding the 3-series aluminum alloy water channel cover and the 6-series aluminum alloy water-cooling plate body using a vacuum electron beam without the use of additional filler metal. This method solves the problem of manufacturing water-cooling plate structures with long welds and complex two-dimensional trajectory characteristics, effectively suppressing weld crystallization cracks. The 6-series aluminum alloy water-cooling plate manufactured by direct vacuum electron beam welding has qualified welds without cracks or porosity, and effectively reduces the risk of weld spike defects. It also simplifies the pre-welding assembly process, improves production efficiency, and reduces production costs.

[0024] The beneficial effects of this invention are as follows: The 6-series aluminum alloy water-cooling plate and its manufacturing method involve directly welding the 5-series or 3-series aluminum alloy water channel cover and the 6-series aluminum alloy water-cooling plate body using a vacuum electron beam without the use of additional filler metal sheets. This effectively suppresses weld crystallization cracks, resulting in a 6-series aluminum alloy water-cooling plate with qualified welds free of cracks and porosity, and effectively reduces the risk of weld stud defects. Simultaneously, it simplifies the pre-welding assembly process, improves production efficiency, and reduces production costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a water-cooled plate in the prior art.

[0026] Figure 2 This is an exploded view of a water-cooling plate in existing technology.

[0027] Figure 3 This is a cross-sectional view of a water-cooled plate in the existing technology.

[0028] Figure 4 This is a schematic diagram of the water-cooling plate in this invention.

[0029] Figure 5 This is an exploded view of the water-cooling plate in this invention.

[0030] Figure 6 This is a cross-sectional view of the water-cooling plate in this invention.

[0031] Figure 7 This is a schematic diagram of the weld seam of a water-cooled plate in the prior art.

[0032] Figure 8 This is a schematic diagram of the structure of the weld seam of the water-cooled plate in this invention.

[0033] In the diagram: 1. Water cooling plate; 2. Main body of water cooling plate; 3. Water channel cover; 4. Water channel; 5. Interface to be welded; 6. Welding sheet. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Components, methods, etc. not specifically described in the present invention all adopt common prior art.

[0035] Example 1: See Figures 4 to 6 A schematic diagram of the water-cooled plate structure in the application.

[0036] A 6-series aluminum alloy water cooling plate 1 includes a 6-series aluminum alloy water cooling plate body 2 and a 5-series aluminum alloy water channel cover 3.

[0037] The water-cooled plate main body 2 is provided with water channels 4, and the shape of the water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the water channel cover plate 3 and the water-cooled plate main body 2. The 5-series aluminum alloy water channel cover plate 3 is directly fitted onto the 6-series aluminum alloy water-cooled plate main body 2 for vacuum electron beam welding. A weld structure with a penetration depth of 6-10 mm is formed between the 5-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water-cooled plate main body. This results in a water-cooled plate 1 without cracks, porosity, or weld nail tip defects.

[0038] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the main body of the water cooling plate, and set the interface to be welded 5 on the water channels 4.

[0039] Step 2: Select 5-series aluminum alloy to make a waterway cover that matches the shape of the waterway.

[0040] Step 3: Place the 5-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 5-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate body with a penetration depth of 6~10mm using a vacuum electron beam. Vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA.

[0041] Step 4: Obtain a 6-series aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0042] The main body 2 of the 6-series aluminum alloy water cooling plate can be made of 6061 aluminum alloy, 6005 aluminum alloy, or 6063 aluminum alloy.

[0043] The 5-series aluminum alloy waterway cover 5 can be made of 5052 aluminum alloy, 5083 aluminum alloy, 5754 aluminum alloy, or 5005 aluminum alloy.

[0044] Example 2: In this embodiment, a 6-series aluminum alloy water-cooling plate 1 includes a 6-series aluminum alloy water-cooling plate body 2 and a 5-series aluminum alloy water channel cover 3. The 6-series aluminum alloy water-cooling plate body 2 is made of 6061 aluminum alloy, and the 5-series aluminum alloy water channel cover 3 is made of 5052 aluminum alloy.

[0045] The 6061 aluminum alloy water-cooling plate body 2 is provided with water channels 4, and the shape of the 5052 aluminum alloy water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the 5052 aluminum alloy water channel cover plate 3 and the 6061 aluminum alloy water-cooling plate body 2. The 5052 aluminum alloy water channel cover plate 3 is directly placed on the 6061 aluminum alloy water-cooling plate body 2 for vacuum electron beam welding. A weld structure with a 6mm penetration depth is formed between the 5052 aluminum alloy water channel cover plate and the 6061 aluminum alloy water-cooling plate body 2. This results in a water-cooling plate 1 without cracks, porosity, or weld nail tip defects.

[0046] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6061 aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the 6061 aluminum alloy water cooling plate main body 2, and set the interface to be welded 5 on the water channels 4.

[0047] Step 2: Select 5052 aluminum alloy to make a 5052 aluminum alloy waterway cover plate that matches the shape of the waterway.

[0048] Step 3: Place the 5052 aluminum alloy water channel cover plate on the interface to be welded in the water channel, and directly weld the 5052 aluminum alloy water channel cover plate and the 6061 aluminum alloy water cooling plate main body to a depth of 6mm using a vacuum electron beam.

[0049] The vacuum electron beam welding process uses a 70kV accelerating voltage, a 10mA defocusing current, a welding speed of 900mm / min, and a beam current of 20mA.

[0050] Step 4: Obtain a 6-series aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0051] Example 3: In this embodiment, a 6-series aluminum alloy water-cooling plate 1 includes a 6-series aluminum alloy water-cooling plate body 2 and a 5-series aluminum alloy water channel cover 3. The 6-series aluminum alloy water-cooling plate body 2 is made of 6061 aluminum alloy, and the 5-series aluminum alloy water channel cover 3 is made of 5052 aluminum alloy.

[0052] The 6061 aluminum alloy water-cooling plate body 2 is provided with water channels 4, and the shape of the 5052 aluminum alloy water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the 5052 aluminum alloy water channel cover plate 3 and the 6061 aluminum alloy water-cooling plate body 2. The 5052 aluminum alloy water channel cover plate 3 is directly placed on the 6061 aluminum alloy water-cooling plate body 2 for vacuum electron beam welding. An 8mm penetration weld structure is formed between the 5052 aluminum alloy water channel cover plate and the 6061 aluminum alloy water-cooling plate body 2. This results in a water-cooling plate 1 without cracks, porosity, or weld nail tip defects.

[0053] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6061 aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the 6061 aluminum alloy water cooling plate main body 2, and set the interface to be welded 5 on the water channels 4.

[0054] Step 2: Select 5052 aluminum alloy to make a 5052 aluminum alloy waterway cover plate that matches the shape of the waterway.

[0055] Step 3: Place the 5052 aluminum alloy water channel cover plate on the interface to be welded in the water channel, and weld the 5052 aluminum alloy water channel cover plate and the 6061 aluminum alloy water cooling plate main body directly with a penetration depth of 8mm using a vacuum electron beam.

[0056] The vacuum electron beam welding process uses a 90kV accelerating voltage, an upper defocusing voltage of 12.5mA, a welding speed of 1050mm / min, and a beam current of 30mA.

[0057] Step 4: Obtain a 6-series aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0058] Example 4: In this embodiment, a 6-series aluminum alloy water-cooling plate 1 includes a 6-series aluminum alloy water-cooling plate body 2 and a 5-series aluminum alloy water channel cover 3. The 6-series aluminum alloy water-cooling plate body 2 is made of 6061 aluminum alloy, and the 5-series aluminum alloy water channel cover 3 is made of 5052 aluminum alloy.

[0059] The 6061 aluminum alloy water-cooling plate body 2 is provided with water channels 4, and the shape of the 5052 aluminum alloy water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the 5052 aluminum alloy water channel cover plate 3 and the 6061 aluminum alloy water-cooling plate body 2. The 5052 aluminum alloy water channel cover plate 3 is directly placed on the 6061 aluminum alloy water-cooling plate body 2 for vacuum electron beam welding. A weld structure with a 10mm penetration depth is formed between the 5052 aluminum alloy water channel cover plate and the 6061 aluminum alloy water-cooling plate body 2. This results in a water-cooling plate 1 without cracks, porosity, or weld nail tip defects.

[0060] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6061 aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the 6061 aluminum alloy water cooling plate main body 2, and set the interface to be welded 5 on the water channels 4.

[0061] Step 2: Select 5052 aluminum alloy to make a 5052 aluminum alloy waterway cover plate that matches the shape of the waterway.

[0062] Step 3: Place the 5052 aluminum alloy water channel cover plate on the interface to be welded in the water channel, and weld the 5052 aluminum alloy water channel cover plate and the 6061 aluminum alloy water cooling plate main body directly with a 10mm penetration depth using a vacuum electron beam.

[0063] The vacuum electron beam welding process uses a 100kV accelerating voltage, a 15mA defocusing current, a welding speed of 1200mm / min, and a beam current of 40mA.

[0064] Step 4: Obtain a 6-series aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0065] Example 5: A 6-series aluminum alloy water cooling plate 1 includes a 6005 aluminum alloy water cooling plate body 2 and a 5052 aluminum alloy water channel cover 3.

[0066] The 6005 aluminum alloy water-cooling plate body 2 is provided with water channels 4, and the shape of the 5052 aluminum alloy water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the 5052 aluminum alloy water channel cover plate 3 and the 6005 aluminum alloy water-cooling plate body 2. The 5052 aluminum alloy water channel cover plate 3 is directly placed on the 6005 aluminum alloy water-cooling plate body 2 for vacuum electron beam welding. A weld structure with a penetration depth of 6-10 mm is formed between the 5-series aluminum alloy water channel cover plate and the 6005 aluminum alloy water-cooling plate body 2. This results in a water-cooling plate 1 without cracks, pores, or weld nail tip defects.

[0067] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6005 aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the main body of the water cooling plate, and set the interface to be welded 5 on the water channels 4.

[0068] Step 2: Select 5052 aluminum alloy material to make a waterway cover plate that matches the shape of the waterway.

[0069] Step 3: Place the 5052 aluminum alloy water channel cover plate on the interface to be welded in the water channel, and directly weld the 5052 aluminum alloy water channel cover plate and the 6005 aluminum alloy water cooling plate main body with a penetration depth of 6~10mm using a vacuum electron beam.

[0070] Vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA.

[0071] Step 4: Obtain a 6005 aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0072] Example 6: A 6-series aluminum alloy water cooling plate 1 includes a 6063 aluminum alloy water cooling plate body 2 and a 5052 aluminum alloy water channel cover 3.

[0073] The 6063 aluminum alloy water-cooling plate body 2 is provided with water channels 4, and the shape of the 5052 aluminum alloy water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the 5052 aluminum alloy water channel cover plate 3 and the 6063 aluminum alloy water-cooling plate body 2. The 5052 aluminum alloy water channel cover plate 3 is directly placed on the 6063 aluminum alloy water-cooling plate body 2 for vacuum electron beam welding. A weld structure with a penetration depth of 6-10 mm is formed between the 5-series aluminum alloy water channel cover plate and the 6063 aluminum alloy water-cooling plate body 2. This results in a water-cooling plate 1 without cracks, porosity, or weld nail tip defects.

[0074] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6063 aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the main body of the water cooling plate, and set the interface to be welded 5 on the water channels 4.

[0075] Step 2: Select 5052 aluminum alloy material to make a waterway cover plate that matches the shape of the waterway.

[0076] Step 3: Place the 5052 aluminum alloy water channel cover plate on the interface to be welded in the water channel, and directly weld the 5052 aluminum alloy water channel cover plate and the 6063 aluminum alloy water cooling plate main body with a penetration depth of 6~10mm using a vacuum electron beam.

[0077] Vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA.

[0078] Step 4: Obtain a 6063 aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0079] The 6-series aluminum alloy water-cooling plate and its manufacturing method described in the above embodiments replace the original 6-series water channel cover with a 5-series aluminum alloy. The weld seams are not pre-filled with 4-series aluminum alloy welding sheets; welding is performed directly, simplifying the assembly steps and saving time and costs. This effectively reduces the need for welding sheet filling during the welding of the water channel cover and base of the 6-series aluminum alloy water-cooling plate, saving time and raw material costs. It solves the problems of complex weld trajectories, long welds, and high penetration requirements in current 6-series aluminum alloy water-cooling plate structures, resulting in difficult manufacturing and poor weld quality.

[0080] Example 7: A 6-series aluminum alloy water cooling plate 1 includes a 6-series aluminum alloy water cooling plate body 2 and a 3-series aluminum alloy water channel cover 3.

[0081] The water-cooled plate main body 2 is provided with water channels 4, and the shape of the water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the water channel cover plate 3 and the water-cooled plate main body 2. The 3-series aluminum alloy water channel cover plate 3 is directly fitted onto the 6-series aluminum alloy water-cooled plate main body 2 for vacuum electron beam welding. A weld structure with a penetration depth of 6-10 mm is formed between the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water-cooled plate main body. This results in a water-cooled plate 1 without cracks, pores, or weld nail tip defects.

[0082] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the main body of the water cooling plate, and set the interface to be welded 5 on the water channels 4.

[0083] Step 2: Select 3-series aluminum alloy material to make waterway cover 3 that matches the shape of the waterway.

[0084] Step 3: Place the 3-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate main body with a penetration depth of 6~10mm using a vacuum electron beam.

[0085] Vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA.

[0086] Step 4: Obtain a 6-series aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0087] Example 8: A 6-series aluminum alloy water-cooling plate 1 includes a 6-series aluminum alloy water-cooling plate body 2 and a 3-series aluminum alloy water channel cover 3. In this embodiment, the water channel cover 3 is made of an aluminum alloy series with physical properties similar to 6-series aluminum alloys and which can optimize the chemical composition of the weld to avoid cracking, such as a 3-series (Al-Mn) aluminum alloy with a specific composition. The 3-series aluminum alloy water channel cover can be made of 3003 aluminum alloy.

[0088] The water-cooled plate main body 2 is provided with water channels 4, and the shape of the water channel cover plate 3 is consistent with the structure of the water channel 4. A welding interface 5 is provided on the water channel 4. No filler material is added at the welding interface 5 between the water channel cover plate 3 and the water-cooled plate main body 2. The 3-series aluminum alloy water channel cover plate 3 is directly fitted onto the 6-series aluminum alloy water-cooled plate main body 2 for vacuum electron beam welding. A weld structure with a penetration depth of 6-10 mm is formed between the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water-cooled plate main body. This results in a water-cooled plate 1 without cracks, pores, or weld nail tip defects.

[0089] A method for manufacturing a 6-series aluminum alloy water-cooling plate includes the following steps: Step 1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water channels 4 on the main body of the water cooling plate, and set the interface to be welded 5 on the water channels 4.

[0090] Step 2: Select 3-series aluminum alloy material to make waterway cover 3 that matches the shape of the waterway.

[0091] Step 3: Place the 3-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate main body with a penetration depth of 6~10mm using a vacuum electron beam.

[0092] Vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA.

[0093] Step 4: Obtain a 6-series aluminum alloy water cooling plate without cracks, pores, or weld nail tip defects.

[0094] The 6-series aluminum alloy water cooling plate and its manufacturing method shown in the above embodiments use 5-series or 3-series aluminum alloy to make the water channel cover plate, and place the 5-series or 3-series aluminum alloy water channel cover plate on the interface to be welded in the water channel. The 6-series aluminum alloy water cooling plate is directly welded to the main body of the water cooling plate by vacuum electron beam welding, thereby obtaining a qualified weld without cracks or pores, and reducing weld nail tip defects.

[0095] 3-series (Al-Mn), 5-series (Al-Mg), and 6-series (Al-Mg-Si) aluminum alloys all contain magnesium (Mg) as a major alloying element. This results in smaller differences in their physical properties, such as melting point and coefficient of thermal expansion, compared to pure aluminum or 2-series and 7-series alloys. Smaller differences in physical properties mean relatively lower thermal stress during welding (reducing mechanical factors). When using vacuum electron beam welding, by optimizing welding parameters, employing an accelerating voltage of 70kV–100kV, an over-defocusing voltage of 10–15mA, a welding speed of 900–1200mm / min, and a beam current of 20–40mA, welding of 5-series aluminum alloy water channel covers and 6-series aluminum alloy body parts with a penetration depth of 6–10mm can be achieved. Furthermore, without the use of 4-series filler metal, qualified welds without cracks or porosity can be obtained, and weld stud defects can be reduced (see [link to documentation]). Figure 8 ). Figure 7 This refers to the weld seam when filling filler sheets in the prior art.

[0096] The 6-series aluminum alloy water-cooling plate and its manufacturing method described in the above embodiments replace the original 6-series water channel cover with a 3-series aluminum alloy. The weld joints are not pre-filled with 4-series aluminum alloy welding pieces; welding is performed directly, simplifying the assembly steps and saving time and costs. This effectively reduces the need for filling welding pieces during the welding of the water channel cover and base of the 6-series aluminum alloy water-cooling plate, saving time and raw material costs. It solves the problems of complex weld trajectories, long welds, and high penetration requirements in current 6-series aluminum alloy water-cooling plate structures, resulting in difficult manufacturing and poor weld quality.

Claims

1. A 6-series aluminum alloy water-cooling plate, characterized in that: It includes a 6-series aluminum alloy water cooling plate main body (2) and a 5-series aluminum alloy water channel cover plate (3). The water cooling plate main body (2) is provided with water channels (4), and a welding interface (5) is provided on the water channels (4). The 5-series aluminum alloy water channel cover plate (3) covers the water channels (4) and is directly welded to the welding interface (5) by vacuum electron beam.

2. The 6-series aluminum alloy water-cooling plate according to claim 1, characterized in that: A welded structure with a penetration depth of 6~10mm is formed between the 5-series aluminum alloy water channel cover plate (3) and the 6-series aluminum alloy water cooling plate main body (2).

3. The 6-series aluminum alloy water-cooling plate according to claim 1 or 2, characterized in that: The main body (2) of the 6-series aluminum alloy water cooling plate is made of 6061 aluminum alloy, 6005 aluminum alloy or 6063 aluminum alloy.

4. The 6-series aluminum alloy water-cooling plate according to claim 1 or 2, characterized in that: The 5-series aluminum alloy waterway cover (5) is made of 5052 aluminum alloy or 5083 aluminum alloy.

5. A method for manufacturing a 6-series aluminum alloy water-cooling plate according to any one of claims 1 to 4, characterized in that: Includes the following steps: S1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water channels on the main body of the water cooling plate, and set the interface to be welded on the water channels; S2: Select 5-series aluminum alloy to make waterway covers that match the shape of the waterway; S3: Place the 5-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 5-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate main body with a penetration depth of 6~10mm using a vacuum electron beam. Among them, vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA; S4: A 6-series aluminum alloy water cooling plate was produced.

6. A 6-series aluminum alloy water-cooling pan, characterized in that: It includes a 6-series aluminum alloy water cooling plate main body (2) and a 3-series aluminum alloy water channel cover plate (3). The water cooling plate main body (2) is provided with water channels (4). A welding interface (5) is provided on the water channels (4). The 3-series aluminum alloy water channel cover plate (3) covers the water channels (4) and is directly welded to the welding interface (5) by vacuum electron beam.

7. The 6-series aluminum alloy water-cooling plate according to claim 6, characterized in that: A welded structure with a penetration depth of 6~10mm is formed between the 3-series aluminum alloy water channel cover plate (3) and the 6-series aluminum alloy water cooling plate main body (2).

8. The 6-series aluminum alloy water-cooling plate according to claim 6 or 7, characterized in that: The main body (2) of the 6-series aluminum alloy water cooling plate is made of 6061 aluminum alloy, 6005 aluminum alloy or 6063 aluminum alloy.

9. The 6-series aluminum alloy water-cooling plate according to claim 6 or 7, characterized in that: The 3-series aluminum alloy waterway cover (3) is made of 3003 aluminum alloy.

10. A method for manufacturing a 6-series aluminum alloy water-cooling plate according to any one of claims 6 to 9, characterized in that: Includes the following steps: S1: Select 6-series aluminum alloy to make the main body of the water cooling plate, and open water channels on the main body of the water cooling plate, and set the interface to be welded on the water channels; S2: Select 3-series aluminum alloy material to make waterway covers that match the shape of the waterway; S3: Place the 3-series aluminum alloy water channel cover plate on the interface to be welded of the water channel, and directly weld the 3-series aluminum alloy water channel cover plate and the 6-series aluminum alloy water cooling plate body with a penetration depth of 6~10mm using a vacuum electron beam. Among them, vacuum electron beam welding uses an accelerating voltage of 70kV to 100kV, an upper defocusing current of 10 to 15mA, a welding speed of 900 to 1200mm / min, and a beam current of 20 to 40mA; S4: A 6-series aluminum alloy water cooling plate was produced.

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