Aluminum alloy composite plate strip for water cooling plate
By reasonably controlling the content of silicon, iron and manganese in the water-cooled aluminum alloy composite plate tape, and adding strontium and rare earth elements, using intersecting electromagnetic field and ultrasonic processing technology, the problem of degradation of casting performance of aluminum alloy composite plate tape is solved, and the casting performance of aluminum alloy composite plate tape is improved Mechanical and thermal conductivity achieve mass production of high yield.
Patent Information
- Application Number
- CN202411098909.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2024-12-10
AI Technical Summary
The existing aluminum alloy composite plate strips of water-cooled plates have reduced casting performance due to the decrease in silicon content, which are relatively limited during rolling, which increases the difficulty of post-processing, and insufficient yield, which cannot meet production requirements.
By reasonably controlling the content of silicon, iron and manganese, and increasing strontium and rare earth elements, the intersecting electromagnetic field and ultrasonic treatment technology are used to optimize the casting and rolling process, and the mechanical properties and thermal conductivity of aluminum alloy composite plates are improved.
It improves the casting and rolling performance and thermal conductivity of aluminum alloy composite plate strips, reduces the process limitation during rolling, and has a yield rate of more than 90%, making it suitable for large-scale mass production.
Smart Images
Figure CN119101829A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of aluminum alloys, and in particular to an aluminum alloy composite plate strip for a water-cooled plate. Background Art
[0002] The water cooling plate is a device used to reduce the surface temperature of the heating element and cool the heating element. It is an important component of the water cooling system.
[0003] Aluminum alloy is an alloy with aluminum as the base and a certain amount of other alloying elements added. It is one of the light metal materials. In addition to the general properties of aluminum, aluminum alloy has some specific properties of alloys due to the different types and quantities of added alloying elements.
[0004] Aluminum alloy has good casting and rolling properties and plastic processing properties, good electrical and thermal conductivity, good corrosion resistance and weldability, so it can be used to make water-cooled plates.
[0005] The existing patent number is CN114606403A, and the patent name is Aluminum Alloy High Strength Water-Cooling Plate for New Energy Power Battery and Its Preparation Method. It records that the water-cooling plate is made of a composite plate, which is rolled and compounded by a core material and a skin material layer. The core material is made of raw materials including the following mass percentages: Si≤0.30%, Fe≤0.60%, Cu0.6-1.0%, Mn1.5-2.0%, Mg≤0.03%, Zn≤0.05%, Ti 0.05-0.2%, and the individual content of other elements is <0.05%, the total amount is <0.15%, and the balance is aluminum. The tensile strength of the water-cooling plate is 145-170MPa, the yield strength is 55-65MPa, the elongation is 20-25%, and the yield strength after welding is 55-70MP.
[0006] The existing water-cooled plate has a similar formula to the one recorded above. In order to improve the thermal conductivity of the aluminum alloy, the contents of silicon, iron and manganese are strictly controlled. However, due to the reduction in silicon content, its casting performance is greatly reduced, which makes its rolling more restricted and the difficulty of later processing increases. As a result, the yield rate of the produced aluminum alloy composite plate and strip is usually around 75%, which does not meet the production requirements. For this reason, we propose an aluminum alloy composite plate and strip for water-cooled plates. Summary of the invention
[0007] The main purpose of the present invention is to provide an aluminum alloy composite plate strip for a water-cooled plate, which can effectively solve the problems in the background technology.
[0008] To achieve the above object, the technical solution adopted by the present invention is:
[0009] An aluminum alloy composite plate strip for a water-cooled plate comprises the following components in parts by weight: 100-120 parts of aluminum, 2.00-4.00 parts of silicon, 0.20-0.60 parts of magnesium, 1.50-2.50 parts of copper, 0.20-0.80 parts of zinc, 2.10-4.50 parts of strontium, 0.10-0.40 parts of titanium and 0.25-0.35 parts of rare earth elements.
[0010] Preferably, an aluminum alloy composite strip for a water-cooled plate comprises the following components in parts by weight: 110 parts of aluminum, 2.80 parts of silicon, 0.42 parts of magnesium, 2.10 parts of copper, 0.45 parts of zinc, 3.20 parts of strontium, 0.20 parts of titanium and 0.28 parts of rare earth elements.
[0011] Preferably, the rare earth elements include praseodymium, cerium and lanthanum, and the ratio of praseodymium, cerium and yttrium in the rare earth elements is 2:1:1.
[0012] Preferably, the production process of the aluminum alloy composite strip for water-cooling plate comprises the following steps:
[0013] S1. Raw material processing: crush the raw materials and then weigh them according to the proportion;
[0014] S2, raw material smelting: high temperature smelting of the weighed raw materials;
[0015] S3, casting and rolling: casting and rolling the molten metal liquid into strips;
[0016] S4, continuous rolling: hot rolling and cold rolling of strip metal products in sequence;
[0017] S5. Heat treatment: heat-treating the rolled product to obtain an aluminum alloy composite plate or strip.
[0018] Preferably, smelting all raw materials in step S2 includes the following steps:
[0019] S21. Preheat the smelting furnace to 600°C, and add raw materials except rare earth elements into the smelting furnace for smelting:
[0020] S22, raising the temperature of the smelting furnace to 750-800°C, smelting for 1.5-2h, and applying an alternating electromagnetic field outside the smelting furnace during smelting;
[0021] S23, adding rare earth elements and refining for 20-40 minutes.
[0022] Preferably, in step S3, the furnace temperature is lowered to 600-650°C before casting and rolling to remove slag, and then the liquid metal is introduced into the casting and rolling equipment. The casting and rolling equipment is ultrasonically treated with an ultrasonic device before casting and rolling, with an ultrasonic power of 200-500W and an ultrasonic frequency of 50KHz±100Hz.
[0023] Preferably, the steps of continuous rolling in step S4 are as follows:
[0024] S41, heating the cast and rolled strip metal, and then sending it into a hot rolling mill for hot rolling;
[0025] S42, cold rolling the hot-rolled strip metal.
[0026] Preferably, the hot rolling in step S41 includes rough rolling and finish rolling, the rough rolling is performed 4-6 times, the total reduction rate of the rough rolling is 60-70%, the reduction rate of a single rolling is less than 20%, and as the number of rough rolling increases, the reduction rate during rolling gradually decreases, the finish rolling is performed 3-4 times, the total reduction rate of the finish rolling is 20-30%, the reduction rate of a single rolling is less than 10%, and as the number of finish rolling increases, the reduction rate during rolling gradually decreases.
[0027] Preferably, the number of cold rolling in step S42 is 2-3 times, and the reduction rate of each rolling is less than 10%, and the steel is rolled to the required thickness.
[0028] Preferably, the cold-rolled strip alloy is trimmed, roll-corrected and cut to length before the heat treatment in step S5, and the cut alloy is heated to 600° C. and kept warm for 16-18 hours during the heat treatment.
[0029] Compared with the prior art, the aluminum alloy composite plate strip for a water-cooled plate of the present invention has the following beneficial effects:
[0030] First, the present invention records an aluminum alloy composite strip for a water-cooled plate, which reasonably controls the contents of silicon, iron and manganese to ensure the casting and rolling performance of the aluminum alloy composite strip, so that the process is less restricted during rolling, and the rolling reduction rate is strictly constrained, so that the yield rate of the aluminum alloy composite strip reaches more than 90%, which is suitable for large-scale batch production and has good prospects for use.
[0031] Secondly, the present invention records an aluminum alloy composite plate and strip for a water-cooled plate, which has an increased strontium content and added rare elements. Strontium and rare elements can modify silicon, and the use of alternating electromagnetic fields and ultrasonic waves to treat the molten metal can eliminate bubbles and promote the modification of silicon, so that the eutectic silicon phase in the alloy is refined to a certain extent, thereby improving the mechanical properties and thermal conductivity of the aluminum alloy composite plate and strip, and has a good prospect for use. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 This is a flow chart of a production process of an aluminum alloy composite plate strip for a water-cooling plate of the present invention;
[0033] Figure 2 This is a microstructure diagram of the aluminum alloy recorded in Example 2 of a production process of an aluminum alloy composite plate strip for a water-cooled plate of the present invention. DETAILED DESCRIPTION
[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0035] Example 1
[0036] An aluminum alloy composite plate strip for a water-cooled plate comprises the following components in parts by weight: 100 parts of aluminum, 2.20 parts of silicon, 0.28 parts of magnesium, 1.60 parts of copper, 0.30 parts of zinc, 2.80 parts of strontium, 0.20 parts of titanium and 0.25 parts of rare earth elements.
[0037] Rare earth elements include praseodymium, cerium and lanthanum, and the ratio of praseodymium, cerium and yttrium in rare earth elements is 2:1:1.
[0038] The production process of aluminum alloy composite strip for water cooling plate includes the following steps:
[0039] S1. Raw material processing: crush the raw materials and then weigh them according to the proportion;
[0040] S2, raw material smelting: high temperature smelting of the weighed raw materials;
[0041] The smelting of all raw materials includes the following steps:
[0042] S21. Preheat the smelting furnace to 600°C, and add raw materials except rare earth elements into the smelting furnace for smelting:
[0043] S22, raising the temperature of the smelting furnace to 780°C, smelting for 2 hours, and applying an alternating electromagnetic field outside the smelting furnace during smelting;
[0044] S23, adding rare earth elements and refining for 30 minutes.
[0045] S3, casting and rolling: casting and rolling the molten metal liquid into strips;
[0046] Before casting and rolling, the furnace temperature is lowered to 640°C for slag removal, and then the liquid metal is introduced into the casting and rolling equipment. Before casting and rolling, the casting and rolling equipment uses ultrasonic equipment for ultrasonic treatment, with an ultrasonic power of 500W and an ultrasonic frequency of 50KHz±100Hz.
[0047] S4, continuous rolling: hot rolling and cold rolling of strip metal products in sequence;
[0048] The steps of continuous rolling in step S4 are as follows:
[0049] S41, heating the cast and rolled strip metal, and then sending it into a hot rolling mill for hot rolling;
[0050] S42, cold rolling the hot-rolled strip metal.
[0051] In step S41, the hot rolling includes rough rolling and finish rolling. The rough rolling is performed 5 times, and the total reduction rate of the rough rolling is 65%. The reduction rate of a single rolling is less than 20%. As the number of rough rolling increases, the reduction rate during rolling gradually decreases. The finish rolling is performed 4 times, and the total reduction rate of the finish rolling is 28%. The reduction rate of a single rolling is less than 10%. As the number of finish rolling increases, the reduction rate during rolling gradually decreases.
[0052] The number of cold rolling in step S42 is 2 times, and the reduction rate of each rolling is less than 10%, and the steel is rolled to the required thickness.
[0053] S5. Heat treatment: heat-treating the rolled product to obtain an aluminum alloy composite plate or strip.
[0054] In step S5, the cold-rolled strip alloy is trimmed, roll-corrected and cut to length before heat treatment. During heat treatment, the cut alloy is heated to 600° C. and kept warm for 18 hours.
[0055] Example 2
[0056] An aluminum alloy composite plate strip for a water-cooled plate comprises the following components in parts by weight: 110 parts of aluminum, 2.80 parts of silicon, 0.42 parts of magnesium, 2.10 parts of copper, 0.45 parts of zinc, 3.20 parts of strontium, 0.20 parts of titanium and 0.28 parts of rare earth elements.
[0057] Rare earth elements include praseodymium, cerium and lanthanum, and the ratio of praseodymium, cerium and yttrium in rare earth elements is 2:1:1.
[0058] The production process of aluminum alloy composite strip for water cooling plate includes the following steps:
[0059] S1. Raw material processing: crush the raw materials and then weigh them according to the proportion;
[0060] S2, raw material smelting: high temperature smelting of the weighed raw materials;
[0061] The smelting of all raw materials includes the following steps:
[0062] S21. Preheat the smelting furnace to 600°C, and add raw materials except rare earth elements into the smelting furnace for smelting:
[0063] S22, raising the temperature of the smelting furnace to 780°C, smelting for 2 hours, and applying an alternating electromagnetic field outside the smelting furnace during smelting;
[0064] S23, adding rare earth elements and refining for 30 minutes.
[0065] S3, casting and rolling: casting and rolling the molten metal liquid into strips;
[0066] Before casting and rolling, the furnace temperature is lowered to 640°C for slag removal, and then the liquid metal is introduced into the casting and rolling equipment. Before casting and rolling, the casting and rolling equipment uses ultrasonic equipment for ultrasonic treatment, with an ultrasonic power of 500W and an ultrasonic frequency of 50KHz±100Hz.
[0067] S4, continuous rolling: hot rolling and cold rolling of strip metal products in sequence;
[0068] The steps of continuous rolling in step S4 are as follows:
[0069] S41, heating the cast and rolled strip metal, and then sending it into a hot rolling mill for hot rolling;
[0070] S42, cold rolling the hot-rolled strip metal.
[0071] In step S41, the hot rolling includes rough rolling and finish rolling. The rough rolling is performed 5 times, and the total reduction rate of the rough rolling is 65%. The reduction rate of a single rolling is less than 20%. As the number of rough rolling increases, the reduction rate during rolling gradually decreases. The finish rolling is performed 4 times, and the total reduction rate of the finish rolling is 28%. The reduction rate of a single rolling is less than 10%. As the number of finish rolling increases, the reduction rate during rolling gradually decreases.
[0072] The number of cold rolling in step S42 is 2 times, and the reduction rate of each rolling is less than 10%, and the steel is rolled to the required thickness.
[0073] S5. Heat treatment: heat-treating the rolled product to obtain an aluminum alloy composite plate or strip.
[0074] In step S5, the cold-rolled strip alloy is trimmed, roll-corrected and cut to length before heat treatment. During heat treatment, the cut alloy is heated to 600° C. and kept warm for 18 hours.
[0075] Example 3
[0076] An aluminum alloy composite plate strip for a water-cooled plate comprises the following components in parts by weight: 120 parts of aluminum, 3.90 parts of silicon, 0.55 parts of magnesium, 2.30 parts of copper, 0.60 parts of zinc, 4.20 parts of strontium, 0.30 parts of titanium and 0.32 parts of rare earth elements.
[0077] Rare earth elements include praseodymium, cerium and lanthanum, and the ratio of praseodymium, cerium and yttrium in rare earth elements is 2:1:1.
[0078] The production process of aluminum alloy composite strip for water cooling plate includes the following steps:
[0079] S1. Raw material processing: crush the raw materials and then weigh them according to the proportion;
[0080] S2, raw material smelting: high temperature smelting of the weighed raw materials;
[0081] The smelting of all raw materials includes the following steps:
[0082] S21. Preheat the smelting furnace to 600°C, and add raw materials except rare earth elements into the smelting furnace for smelting:
[0083] S22, raising the temperature of the smelting furnace to 780°C, smelting for 2 hours, and applying an alternating electromagnetic field outside the smelting furnace during smelting;
[0084] S23, adding rare earth elements and refining for 30 minutes.
[0085] S3, casting and rolling: casting and rolling the molten metal liquid into strips;
[0086] Before casting and rolling, the furnace temperature is lowered to 640°C for slag removal, and then the liquid metal is introduced into the casting and rolling equipment. Before casting and rolling, the casting and rolling equipment uses ultrasonic equipment for ultrasonic treatment, with an ultrasonic power of 500W and an ultrasonic frequency of 50KHz±100Hz.
[0087] S4, continuous rolling: hot rolling and cold rolling of strip metal products in sequence;
[0088] The steps of continuous rolling in step S4 are as follows:
[0089] S41, heating the cast and rolled strip metal, and then sending it into a hot rolling mill for hot rolling;
[0090] S42, cold rolling the hot-rolled strip metal.
[0091] In step S41, the hot rolling includes rough rolling and finish rolling. The rough rolling is performed 5 times, and the total reduction rate of the rough rolling is 65%. The reduction rate of a single rolling is less than 20%. As the number of rough rolling increases, the reduction rate during rolling gradually decreases. The finish rolling is performed 4 times, and the total reduction rate of the finish rolling is 28%. The reduction rate of a single rolling is less than 10%. As the number of finish rolling increases, the reduction rate during rolling gradually decreases.
[0092] The number of cold rolling in step S42 is 2 times, and the reduction rate of each rolling is less than 10%, and the steel is rolled to the required thickness.
[0093] S5. Heat treatment: heat-treating the rolled product to obtain an aluminum alloy composite plate or strip.
[0094] In step S5, the cold-rolled strip alloy is trimmed, roll-corrected and cut to length before heat treatment. During heat treatment, the cut alloy is heated to 600° C. and kept warm for 18 hours.
[0095] The data recorded in the scheme with patent number CN114606403A is used as a comparative example, and the test results are shown in the following table;
[0096] Example 1 Example 2 Example 3 Comparative Example Tensile strength(MPa) 186 198 195 160 Elongation(%) 18.4 19.2 19.1％ 22％ Yield strength(MPa) 66 73 75 60 Thermal conductivity (W / (MK)) 200 212 216 191
[0097] Although the aluminum alloy material developed by the present invention is slightly inferior to the comparative example in terms of elongation, its other properties all exceed those of the comparative example, and it fully meets the requirements for producing water-cooled plates.
[0098] As can be seen from the above table, the performance of the solution in Example 2 is not much improved compared with the solution in Example 3, but there is a certain difference in cost. Therefore, the solution recorded in Example 2 is preferred.
[0099] When in use, it can reasonably control the content of silicon, iron and manganese, ensure the casting and rolling performance of the aluminum alloy composite plate and strip, make the process less restricted during rolling, strictly constrain the rolling reduction rate, so that the yield rate of the aluminum alloy composite plate and strip reaches more than 90%, which is suitable for large-scale batch production and has good prospects for use.
[0100] The present invention records an aluminum alloy composite plate strip for a water-cooled plate, which has an increased strontium content and added rare elements. Strontium and rare elements can modify silicon, and the use of alternating electromagnetic fields and ultrasonic waves to treat the metal melt can eliminate bubbles and promote the modification of silicon, so that the eutectic silicon phase in the alloy is refined to a certain extent, thereby improving the mechanical properties and thermal conductivity of the aluminum alloy composite plate strip, and has a good prospect for use.
[0101] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An aluminum alloy composite strip for a water-cooled plate, characterized in that: The invention comprises the following components in parts by weight: 100-120 parts of aluminum, 2.00-4.00 parts of silicon, 0.20-0.60 parts of magnesium, 1.50-2.50 parts of copper, 0.20-0.80 parts of zinc, 2.10-4.50 parts of strontium, 0.10-0.40 parts of titanium and 0.25-0.35 parts of rare earth elements.
2. The aluminum alloy composite plate strip for a water-cooled plate according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 110 parts of aluminum, 2.80 parts of silicon, 0.42 parts of magnesium, 2.10 parts of copper, 0.45 parts of zinc, 3.20 parts of strontium, 0.20 parts of titanium and 0.28 parts of rare earth elements.
3. The aluminum alloy composite plate strip for a water-cooled plate according to any one of claims 1-2, characterized in that: The rare earth elements include praseodymium, cerium and lanthanum, and the ratio of praseodymium, cerium and yttrium in the rare earth elements is 2:1:
1.
4. The aluminum alloy composite plate strip for a water-cooled plate according to claim 3, characterized in that: The production process of the aluminum alloy composite plate strip for water-cooling plate comprises the following steps: S1. Raw material processing: crush the raw materials and then weigh them according to the proportion; S2, raw material smelting: high temperature smelting of the weighed raw materials; S3, casting and rolling: casting and rolling the molten metal liquid into strips; S4, continuous rolling: hot rolling and cold rolling of strip metal products in sequence; S5. Heat treatment: heat-treating the rolled product to obtain an aluminum alloy composite plate or strip.
5. The aluminum alloy composite plate strip for a water-cooled plate according to claim 4, characterized in that: The smelting of all raw materials in step S2 includes the following steps: S21. Preheat the smelting furnace to 600°C, and add raw materials except rare earth elements into the smelting furnace for smelting: S22, raising the temperature of the smelting furnace to 750-800°C, smelting for 1.5-2h, and applying an alternating electromagnetic field outside the smelting furnace during smelting; S23, adding rare earth elements and refining for 20-40 minutes.
6. The aluminum alloy composite plate strip for a water-cooled plate according to claim 4, characterized in that: In step S3, the furnace temperature is lowered to 600-650°C to remove slag before casting and rolling, and then the metal liquid is introduced into the casting and rolling equipment. The casting and rolling equipment is ultrasonically treated with an ultrasonic device before casting and rolling, with an ultrasonic power of 200-500W and an ultrasonic frequency of 50KHz±100Hz.
7. The aluminum alloy composite plate strip for a water-cooled plate according to claim 4, characterized in that: The steps of continuous rolling in step S4 are as follows: S41, heating the cast and rolled strip metal, and then sending it into a hot rolling mill for hot rolling; S42, cold rolling the hot-rolled strip metal.
8. The aluminum alloy composite plate strip for a water-cooled plate according to claim 7, characterized in that: In step S41, the hot rolling includes rough rolling and finish rolling. The rough rolling is performed 4-6 times, and the total reduction rate of the rough rolling is 60-70%. The reduction rate of a single rolling is less than 20%. As the number of rough rolling increases, the reduction rate during rolling gradually decreases. The finish rolling is performed 3-4 times, and the total reduction rate of the finish rolling is 20-30%. The reduction rate of a single rolling is less than 10%. As the number of finish rolling increases, the reduction rate during rolling gradually decreases.
9. The aluminum alloy composite plate strip for a water-cooled plate according to claim 7, characterized in that: The number of cold rolling in step S42 is 2-3 times, and the reduction rate of each rolling is less than 10%, and the steel is rolled to the required thickness.
10. The aluminum alloy composite plate strip for a water-cooled plate according to claim 9, characterized in that: In step S5, the cold-rolled strip alloy is trimmed, roll-corrected and cut to length before heat treatment. During heat treatment, the cut alloy is heated to 600° C. and kept warm for 16-18 hours.