Magnesium-based composite material preparation device

Abstract

The magnesium-based composite material preparation device comprises a preparation smelting furnace, a heating component, a vacuum system, a stirring mechanism and a mold, and the preparation smelting furnace comprises a shell capable of being sealed and a crucible arranged in the shell; the heating part is used for heating the magnesium material ingot blank in the crucible to enable the magnesium material ingot blank to be liquefied to form magnesium melt; the vacuum system is used for forming a vacuum state in the preparation smelting furnace; the stirring mechanism is used for stirring the magnesium melt to form turbulent flow, and the turbulent flow can roll up the high-strength particles in the crucible and uniformly distribute the high-strength particles in the magnesium melt to form a magnesium-based composite material; a mold is disposed within the housing. According to the magnesium-based composite material preparation device, high-strength particles can be uniformly distributed in magnesium melt, so that the performance of the magnesium-based composite material is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of metal composite material preparation technology, specifically to a magnesium-based composite material preparation apparatus. Background Technology

[0002] Magnesium-based composites are made by using magnesium as the matrix and high-strength ceramics or dissimilar metals as reinforcements, combining the advantages of both. Their high strength and toughness are particularly prominent, making them promising for applications in aerospace, automotive, and other fields. Among these, high-strength particle-reinforced magnesium-based composites exhibit exceptional overall performance. However, the magnesium matrix and high-strength particle reinforcements are immiscible and have different densities. Therefore, the high-strength particles settle due to gravity during the preparation process, resulting in uneven distribution of the reinforcement in the resulting high-strength particle-reinforced magnesium-based composites. Ultimately, this leads to poor service performance, hindering further industrial applications.

[0003] Stir casting is a widely used method for preparing high-strength particle-reinforced magnesium matrix composites. However, traditional stirring devices and methods struggle to lift the settling, high-density, high-strength particles in the molten magnesium through laminar flow, and also fail to address the agglomeration problem of high-strength particles, ultimately leading to a decline in the overall mechanical properties of the composite material. Therefore, there is an urgent need to provide an effective device and method for improving the dispersion of high-strength particles in magnesium matrix composites. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a magnesium-based composite material preparation device that can make high-strength particles uniformly distributed in magnesium melt, thereby improving the performance of magnesium-based composite materials.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a magnesium-based composite material preparation apparatus, comprising:

[0006] A furnace for manufacturing; comprising a sealable outer shell and a crucible disposed within the outer shell;

[0007] A heating element is used to heat the magnesium ingot in the crucible to liquefy it and form a magnesium melt.

[0008] A vacuum system is used to create a vacuum state inside the preparation furnace;

[0009] A stirring mechanism is used to stir the magnesium melt to create turbulence, which can entrain high-strength particles in the crucible and distribute them uniformly within the magnesium melt to form a magnesium-based composite material; and

[0010] The mold is located inside the outer casing.

[0011] Furthermore, the stirring mechanism includes at least two stirring rods and a stirring driver connected to the stirring rods. The stirring rods are evenly arranged circumferentially relative to the central axis of the crucible and are inclined relative to the bottom of the crucible, and can extend into the crucible.

[0012] Furthermore, the angle between the stirring rod and the central axis of the crucible is greater than 0° and less than 30°.

[0013] Furthermore, it also includes a rotating mechanism, wherein the crucible is rotatably disposed within the outer casing, and the rotating mechanism is connected to the crucible for driving the crucible to rotate about an axis parallel to the ground.

[0014] Furthermore, the rotating mechanism includes a rotating power source and a tilting shaft. The tilting shaft is parallel to the ground and rotatably disposed inside the preparation furnace and connected to the crucible. The rotating power source is used to drive the tilting shaft to rotate, and when the tilting shaft rotates, it can drive the crucible to rotate.

[0015] Furthermore, the heating component includes a thermocouple and a heating module. The heating module is wrapped around the outer wall of the crucible, and the thermocouple can extend from the outer shell into the crucible to measure the temperature.

[0016] Furthermore, the outer shell includes a furnace body and a furnace cover, the furnace cover being able to seal and seal with the furnace body, and the furnace cover being provided with a second material hopper for adding material into the furnace body.

[0017] The beneficial effects of this utility model are:

[0018] In the above-mentioned magnesium-based composite material preparation device, magnesium material ingots are first placed in a crucible, and the vacuum system and heating components are started until the magnesium material ingot liquefies to form magnesium melt. Then, the stirring mechanism is started to stir the magnesium melt, causing the magnesium melt to generate multi-directional centrifugal force, thereby promoting the formation of turbulence in the magnesium melt. After the formation of turbulence, high-strength particles are added to the magnesium melt. The vertical component of the centrifugal force can resist gravity and keep the high-strength particles in a suspended state. Then, the mechanical stirring is maintained until the high-strength particles are evenly distributed in the magnesium melt to form a liquid magnesium-based composite material. Finally, the liquid magnesium-based composite material in the magnesium melt is poured into a mold until it solidifies into a solid magnesium-based composite material, which can then be removed.

[0019] The above-mentioned magnesium-based composite material preparation device can make high-strength particles uniformly distributed in the magnesium melt, thereby effectively improving the performance of magnesium-based composite materials. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of a magnesium-based composite material preparation apparatus provided in one embodiment of the present invention;

[0022] Figure 2 for Figure 1 The diagram shows an internal top view of the magnesium-based composite material preparation apparatus.

[0023] Figure 3 This is a schematic diagram of the centrifugal effect generated by the dual stirring rods during the preparation of the magnesium-based composite material.

[0024] Figure 4 Scanning electron microscope image of Ti particle-reinforced magnesium matrix composite material produced using this magnesium matrix composite material preparation apparatus;

[0025] Figure 5 Scanning electron microscope image of Ti particle-reinforced magnesium matrix composite material produced by a conventional magnesium matrix composite material preparation device;

[0026] Figure label:

[0027] 1. Stirring mechanism; 2. Thermocouple; 3. Magnesium melt; 4. Tilting shaft; 5. Second hopper; 6. Furnace cover; 7. Crucible; 8. Heating module; 9. External frame; 10. Rotary power source; 11. Furnace body; 12. Vacuum system; 13. Mold. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] Please see Figures 1 to 5 This utility model provides a magnesium-based composite material preparation device, including a preparation furnace, a heating component, a vacuum system 12, a stirring mechanism 1, and a mold 13.

[0030] Specifically, the preparation furnace includes a sealable outer shell and a crucible 7 disposed within the outer shell. A heating element is used to heat the magnesium ingot within the crucible 7, liquefying it to form magnesium melt 3. A vacuum system 12 is used to create a vacuum state within the preparation furnace. A stirring mechanism 1 is used to stir the magnesium melt 3 to create turbulence; this turbulence can lift and uniformly distribute high-strength particles in a precipitated state within the crucible 7 within the magnesium melt 3, forming a magnesium-based composite material.

[0031] In use, first place the magnesium material ingot in the crucible 7, start the vacuum system 12 and heating components until the magnesium material ingot liquefies to form magnesium melt 3, then start the stirring mechanism 1 to stir the magnesium melt 3, so that the magnesium melt 3 generates multi-directional centrifugal force, thereby causing the magnesium melt 3 to form turbulence. After the turbulence is formed, high-strength particles are added to the magnesium melt 3. The vertical component of the centrifugal force can resist gravity and keep the high-strength particles in a suspended state. Then maintain the mechanical stirring state until the high-strength particles are evenly distributed in the magnesium melt 3 to form a liquid magnesium-based composite material. Finally, pour the liquid magnesium-based composite material in the magnesium melt 3 into the mold 13 until it solidifies into a solid magnesium-based composite material and then remove it.

[0032] Using the aforementioned magnesium-based composite material preparation apparatus, high-strength particles can be uniformly distributed within the magnesium melt 3, thereby effectively improving the performance of the magnesium-based composite material (see reference). Figure 4 and Figure 5 ),

[0033] It should be noted that in this application, the magnesium material ingot is an AZ91 ingot, a solid containing 90% magnesium, 9% aluminum, and 1% zinc. The high-strength particles are Ti particles, solid with a purity of 99.9% and a particle size of 10 μm to 20 μm.

[0034] In this embodiment, the stirring mechanism 1 includes at least two stirring rods and a stirring driver connected to the stirring rods. The stirring rods are evenly arranged circumferentially relative to the central axis of the crucible 7 and are inclined relative to the bottom of the crucible 7, and can extend into the crucible 7. In specific implementations, the number of stirring rods can be 2, 3, 4, etc., and the angle between them and the central axis of the crucible 7 is greater than 0° and less than 30°.

[0035] For example, when there are two stirring rods arranged symmetrically on the left and right, with an angle of 15° between them and the central axis of crucible 7, the centrifugal force F generated by the left and right stirring rods will be... 左 and F 右 Decomposition yields the component force F that resists gravity. 左1 and F 右1 If its direction is vertically upward, it can create turbulence within the magnesium melt 3 (see...). Figure 3 ).

[0036] In this embodiment, the outer shell includes a furnace body 11 and a furnace cover 6. The furnace cover 6 can be sealed to the furnace body 11, and the furnace cover 6 is provided with a second material bin 5 for adding material into the furnace body 11.

[0037] When in use, the high-strength granules can be stored in the second hopper 5. When it is necessary to add material, they can be directly added to the crucible 7.

[0038] In this embodiment, the heating component includes a thermocouple 2 and a heating module 8. The heating module 8 is wrapped around the outer wall of the crucible 7, and the thermocouple 2 can extend from the outer shell into the crucible 7 to measure the temperature. In a specific implementation, the thermocouple 2 is mounted on the furnace cover 6 to achieve lifting and fixing. In addition, an external frame 9 is fitted over the heating module 8 to fix the heating module 8.

[0039] In a preferred embodiment, the device further includes a rotating mechanism. The crucible 7 is rotatably disposed within the outer casing. The rotating mechanism is connected to the crucible 7 and drives the crucible 7 to rotate about an axis parallel to the ground. This allows the liquid magnesium-based composite material inside the crucible 7 to be poured into the mold 13 for molding.

[0040] Specifically, the rotating mechanism includes a rotating power source 10 and a tilting shaft 4. The tilting shaft 4 is rotatably mounted parallel to the ground inside the preparation furnace and connected to the crucible 7. The rotating power source 10 drives the tilting shaft 4 to rotate, which in turn drives the crucible 7 to rotate. In specific implementations, the rotating power source 10 can be any mechanism capable of driving the tilting shaft 4 to rotate, such as a single drive servo motor, a pulley mechanism, a gear mechanism, etc.

[0041] The specific method of using the above-mentioned magnesium-based composite material preparation device is as follows:

[0042] First, pre-treat magnesium ingot blanks:

[0043] 1. Use 600-grit sandpaper to polish the surface of the magnesium ingot blank to remove oil stains, and then use 800-grit, 1000-grit, and 1200-grit sandpaper in sequence to polish to ensure that the surface of the magnesium ingot blank is smooth.

[0044] 2. Wipe and clean the surface of the magnesium ingot blank with anhydrous ethanol and blow it dry;

[0045] 3. Wipe and clean the surface of the magnesium ingot blank with acetone and blow it dry;

[0046] Second, the assembly and debugging of the device:

[0047] 1. Before assembly, the inner surface of crucible 7, the outer surface of stirring rod, the outer surface of thermocouple 2, and the second material bin 5 should be cleaned to ensure that there are no residues of materials, oxides, impurities, etc. from the previous batch.

[0048] 2. Enclose the crucible 7 within the heating module 8 and fix them together within the outer frame 9; connect the tilting shaft 4 to the rotary power source 10 to drive the tilting shaft 4; install the tilting shaft 4 on the inner wall of the furnace body 11 to allow the tilting shaft 4 to tilt freely within the furnace body 11; install the outer frame 9 on the tilting shaft 4 to allow the crucible 7, heating module 8, and outer frame 9 to tilt with the rotation of the tilting shaft 4; adjust the tilting limit to ensure that all the magnesium-based composite material in the crucible 7 is poured out after the tilting is complete; reset the tilting shaft 4 to ensure that the bottom surface of the crucible 7 is basically perpendicular to the direction of gravity; connect the stirring rod, thermocouple 2, and the second material... The bins 5 are installed in the corresponding slots of the furnace cover 6, so that the stirring rod, thermocouple 2, and second bin 5 are integrated with the furnace cover 6. The lowering and raising of the stirring rod are adjusted to ensure that the stirring rod does not interfere with each other and with the bottom and inner wall of the crucible 7 after it is lowered, and does not interfere with the tilting of the crucible 7, heating module 8, and outer frame 9 after it is raised. The insertion and withdrawal of the thermocouple 2 are adjusted to ensure that the thermocouple 2 does not interfere with the stirring rod after it is inserted, and does not interfere with the crucible 7, heating module 8, and outer frame 9 after it is withdrawn. The feeding process of the second bin 5 is adjusted to ensure that the high-strength particles in the second bin 5 can be smoothly fed into the crucible 7, and that the feeding process does not interfere with the thermocouple 2 and the stirring rod.

[0049] 3. After assembly, raise the stirring rod, pull out the thermocouple 2, reset the second material bin 5, and raise the furnace cover 6.

[0050] Third, composite material preparation

[0051] Magnesium ingots are placed in crucible 7, and Ti particles are placed in the second hopper 5; the furnace lid 6 is lowered to ensure a tight fit between the lid 6 and the furnace body 11; the vacuum system 12 is activated to reduce the pressure inside the furnace to 10. -3 Below Pa, high-purity argon gas is introduced to maintain the furnace pressure at 10. -3 Pa~10 -2 Pa, insert thermocouple 2 to heat heating module 8 to 800°C~850°C. After the magnesium material is completely liquefied, lower the stirring rod so that it extends into the magnesium melt 3. Operate the control system to keep the temperature of heating module 8 at 580°C~700°C and maintain the temperature. Turn on the stirring rod to stir the magnesium melt 3. After the magnesium melt 3 forms turbulence, add Ti particles and keep the stirring rod on to maintain mechanical stirring. After mechanical stirring is completed, turn off and raise the stirring rod, while rapidly raising the temperature to 750°C~800°C. Pull out thermocouple 2, turn off heating, and control the rotation power source 10 to rotate tilting shaft 4 to pour the Ti particle-reinforced magnesium matrix composite material in crucible 7 into mold 13. Reset tilting shaft 4, outer frame 9, heating module 8 and crucible 7 to complete casting.

[0052] Fourth: Remove the composite material

[0053] After casting, keep the furnace under heat and pressure for 1-2 hours, then close the vacuum system 12, fill the furnace with air to bring the pressure inside the furnace to atmospheric pressure, lift the furnace cover 6, and remove the mold 13 and the Ti particle reinforced magnesium matrix composite material. Open the mold 13, remove the Ti particle reinforced magnesium matrix composite material, and after the surface is smoothed, it can be put into use.

[0054] See also Figure 4 and Figure 5 As can be seen intuitively, the scanning electron microscope images of the Ti particle-reinforced AZ91-based composite material obtained by this device are as follows: Figure 4 As shown, scanning electron microscope images of Ti particle-reinforced AZ91-based composite materials prepared using the same material with conventional stirring apparatus and methods are as follows. Figure 5 As shown. Comparison Figure 4 and Figure 5 It can be seen that in the Ti particle-reinforced AZ91 magnesium matrix composite material obtained using this device and method, Ti particles are uniformly dispersed in the AZ91 matrix, while the Ti particle-reinforced AZ91 magnesium matrix composite material prepared using a conventional stirring device and method shows obvious Ti particle agglomeration.

[0055] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A magnesium-based composite material preparation apparatus, characterized in that, include: A furnace for manufacturing; comprising a sealable outer shell and a crucible disposed within the outer shell; A heating element is used to heat the magnesium ingot in the crucible to liquefy it and form a magnesium melt. A vacuum system is used to create a vacuum state inside the preparation furnace; A stirring mechanism is used to stir the magnesium melt to form turbulence, which can roll up the high-strength particles in the crucible and distribute them evenly in the magnesium melt to form a magnesium-based composite material. and The mold is located inside the outer casing.

2. The magnesium-based composite material preparation apparatus according to claim 1, characterized in that, The stirring mechanism includes at least two stirring rods and a stirring driver connected to the stirring rods. The stirring rods are evenly arranged circumferentially relative to the central axis of the crucible and are inclined relative to the bottom of the crucible, and can extend into the crucible.

3. The magnesium-based composite material preparation apparatus according to claim 2, characterized in that, The angle between the stirring rod and the central axis of the crucible is greater than 0° and less than 30°.

4. The magnesium-based composite material preparation apparatus according to claim 1, characterized in that, It also includes a rotating mechanism, in which the crucible is rotatably disposed within the outer casing, the rotating mechanism being connected to the crucible for driving the crucible to rotate about an axis parallel to the ground.

5. The magnesium-based composite material preparation apparatus according to claim 4, characterized in that, The rotating mechanism includes a rotating power source and a tilting shaft. The tilting shaft is parallel to the ground and rotatably disposed inside the preparation furnace and connected to the crucible. The rotating power source is used to drive the tilting shaft to rotate, and when the tilting shaft rotates, it can drive the crucible to rotate.

6. The magnesium-based composite material preparation apparatus according to claim 1, characterized in that, The heating component includes a thermocouple and a heating module. The heating module is wrapped around the outer wall of the crucible, and the thermocouple can extend from the outer shell into the crucible to measure the temperature.

7. The magnesium-based composite material preparation apparatus according to claim 1, characterized in that, The outer shell includes a furnace body and a furnace cover. The furnace cover can be sealed to the furnace body, and the furnace cover is provided with a second material hopper for adding material into the furnace body.

Images