A preparation device and preparation method of bimetallic composite material

Abstract

The present invention discloses a preparation device and preparation method of a bimetallic composite material. The present invention adopts solid-liquid composite casting to prepare the bimetallic composite material. After the bimetallic composite material is cast, the bimetallic composite material is pressurized and maintained by a pressure system, which effectively further improves the interface bonding strength of the bimetallic composite material; a casting method in which multiple systems are coordinated is adopted, so that the preparation of the bimetallic composite material is more efficient, simpler and easier to operate, and the safety hazards in the material preparation process are reduced; a movable pressure mold cavity base structure is adopted, which cooperates with the pressure system to achieve rapid demoulding of the bimetallic composite material and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of preparation of bimetallic composite materials, and specifically to a preparation device and a preparation method of a bimetallic material of solid-liquid composite casting. Background Art

[0002] With the continuous development of national high-tech, the performance requirements for materials are becoming more and more stringent. The performance of a single material is currently difficult to meet the requirements of certain fields. Therefore, bimetallic composite materials have become a research hotspot in recent years. Bimetallic composite materials have the excellent properties of two metal materials, making up for the shortcomings of single metal materials in terms of performance. They have a unique "complementary effect" and can improve the current situation of single materials being limited in application due to individual performance defects.

[0003] For the preparation of bimetallic composite materials, the existing preparation technologies mainly include solid-solid composite, solid-liquid composite and liquid-liquid composite. These technical methods generally have problems such as high production cost, low efficiency and uneven interface bonding strength. At present, the domestic preparation of bimetallic composite materials mainly adopts rolling composite technology, but this method has relatively low interface bonding strength, and the performance of the prepared products meets the requirements of cutting-edge fields such as aerospace; the production of bimetallic composite materials abroad is mainly based on the Noveli composite method independently developed by Noveli Company in the United States. This method solves the problem of relatively low interface bonding strength of bimetallic composite materials, but the cost of preparing bimetallic composite products is too high, and the control of temperature variables during the preparation process alone costs hundreds of millions of US dollars. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a device for preparing a bimetallic composite material.

[0005] The present invention adopts the following technical solutions:

[0006] A preparation device for a bimetallic composite material comprises a pressurizing system, a liquid metal heating system, a solid metal preheating system, a control system, a pressure mold cavity fixing plate, a pressure mold cavity fixing column, a device base, a movable pressure mold cavity base, a liquid metal guide groove a, a liquid metal guide groove b, and a liquid metal guide pipe.

[0007] The pressurizing system includes a press machine body and a pressure punch; the liquid metal heating system includes a liquid metal insulation chamber and a liquid metal heating base; and the solid metal preheating system includes a solid metal preheating cavity and a heating resistor.

[0008] The press body is located on the device base; the pressure punch is installed on the top of the press body and is coaxial with the solid metal preheating cavity; the liquid metal heating base is located above the device base; the liquid metal insulation chamber is located above the liquid metal heating base; the liquid metal guide groove a is located directly below the liquid metal insulation chamber and inside the liquid metal heating base; the liquid metal guide groove b is located inside the solid metal preheating cavity, and the two ends of the liquid metal guide groove b are tangent to the upper surface and the inner cavity wall of the solid metal preheating cavity respectively; the pressure cavity fixing plate is fixed to the solid metal preheating cavity; the pressure cavity fixing columns are respectively located around the pressure cavity fixing plate and fixed thereto, and the lower ends of the pressure cavity fixing columns are fixed to the device base; the heating resistor is located in the outer cavity of the solid metal preheating cavity; the two ends of the liquid metal guide pipe are respectively connected to the liquid metal guide groove a and the liquid metal guide groove b; the movable pressure cavity base is located directly below the solid metal preheating cavity; the control system is placed on the outer surface of the device base.

[0009] The method for preparing the bimetallic composite material using the above device is as follows:

[0010] Step 1: The control system is used to adjust the heating of the liquid metal heating base so that the liquid metal in the liquid metal insulation chamber is melted and kept warm at a certain temperature;

[0011] Step 2: Put the solid metal into the solid metal preheating cavity, heat the heating resistor in the solid metal preheating cavity through the control system, and set the insulation temperature;

[0012] Step 3: When the liquid metal in the liquid metal insulation chamber and the solid metal in the solid metal preheating cavity reach the predetermined preparation temperature, the control system is used to adjust the liquid metal guide groove a and the liquid metal guide groove b to an open state, so that the liquid metal is evenly poured on the surface of the solid metal through the liquid metal guide pipe. At the same time, the control system is used to adjust the pressure of the punch to press downward into the solid metal preheating cavity, and the pressure is stopped and maintained after the set pressure is reached;

[0013] Step 4: After the pressure holding is completed, the pressure punch is adjusted by the control system to exit the solid metal preheating die cavity;

[0014] Step 5: adjusting the movable pressure cavity base through the control system so that the lower end of the solid metal preheating cavity is in a base-free state;

[0015] Step six: The pressure punch is adjusted again through the control system so that the pressure punch pushes the bimetallic composite material out of the solid metal preheating film cavity to achieve demolding.

[0016] Step 7: The movable pressure cavity base is adjusted back to the initial position through the control system, and other systems are turned off, and the preparation of the bimetallic composite material is completed.

[0017] Compared with the prior art, the present invention has the following advantages and effects:

[0018] The present invention adopts solid-liquid composite casting to prepare bimetallic composite materials. After the casting of the bimetallic composite materials is completed, the bimetallic composite materials are pressurized and maintained by a pressure system, which effectively further improves the interface bonding strength of the bimetallic composite materials. The casting method using multiple systems in coordination makes the preparation of the bimetallic composite materials more efficient, simpler and easier to operate, and reduces the safety hazards in the material preparation process. The movable pressure mold cavity base structure is adopted, which cooperates with the pressure system to achieve rapid demolding of the bimetallic composite materials and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is the overall mechanical structure diagram of the invented device.

[0020] Figure 2 It is a cross-sectional mechanical structure diagram of the invented device.

[0021] Figure 3 This is a scanning electron microscope image of Example 1.

[0022] Figure 4 This is a scanning electron microscope image of Example 2. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to specific embodiments.

[0024] In the description of the present invention, it should be understood that the terms "outside", "inside", "front end", "top", "upper", "left", "right", "middle", "surrounding" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In the description of the present invention, the terms "installed", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0025] Example 1

[0026] like Figure 1 , Figure 2As shown, the present invention discloses a preparation device for a bimetallic composite material, which consists of four parts: a pressurizing system, a liquid metal heating system, a solid metal preheating system, and a control system. The pressurizing system mainly includes a press machine body 1 and a pressure punch 2; the liquid metal heating system mainly includes a liquid metal insulation chamber 7 and a liquid metal heating base 9; the solid metal preheating system mainly includes a solid metal preheating cavity 12 and a heating resistor 11. The device also includes a control system 13, a pressure cavity fixing plate 3, a pressure cavity fixing column 4, a device base 5, a movable pressure cavity base 10, a liquid metal guide groove a 8, a liquid metal guide groove b 14, and a liquid metal guide pipe 6.

[0027] The press body is located on the device base 5; the pressure punch 2 is installed on the top of the press body 1 and is coaxial with the solid metal preheating mold cavity 12; the liquid metal heating base 9 is located above the device base 5; the liquid metal insulation chamber 7 is located above the liquid metal heating base 9; the liquid metal guide groove a 8 is located directly below the liquid metal insulation chamber 7 and is inside the liquid metal heating base 9; the liquid metal guide groove b 14 is located inside the solid metal preheating mold cavity 12, and the ports of the liquid metal guide groove b are respectively tangent to the upper surface and the inner cavity wall of the solid metal preheating mold cavity 12; the pressure mold cavity fixing plate 3 is fixed together with the solid metal preheating mold cavity 12; the pressure mold cavity fixing columns 4 are respectively located around the pressure mold cavity fixing plate 3 and fixed thereto, and their lower ends are fixed to the device base 5; the heating resistor 11 is located in the outer cavity of the solid metal preheating mold cavity 12; the two ends of the liquid metal guide pipe 6 are respectively connected to the liquid metal guide groove a 8 and the liquid metal guide groove b movable pressure cavity base 10 is located directly below the solid metal preheating cavity 12; the control system 13 is placed on the outer surface of the device base 5.

[0028] The method for preparing the 7075 / 6061 aluminum alloy bimetallic composite material using the above device is achieved by the following steps:

[0029] Step 1: The control system 13 is used to adjust the heating of the liquid metal heating base 9 so that the 6061 aluminum alloy in the liquid metal insulation chamber 7 is melted and kept at 720° C.;

[0030] Step 2: Place the 7075 aluminum alloy substrate into the solid metal preheating cavity 12, heat the heating resistor 11 in the solid metal preheating cavity 12 through the control system 13, and set the insulation temperature to 450° C.

[0031] Step 3: When the 6061 aluminum alloy in the liquid metal insulation chamber 7 and the 7075 aluminum alloy substrate in the solid metal preheating cavity 12 reach the predetermined preparation temperature, the control system 13 is used to adjust the liquid metal guide groove a 8 and the liquid metal guide groove b14 to an open state, so that the 6061 aluminum alloy liquid is evenly poured on the surface of the 7075 aluminum alloy substrate through the liquid metal guide pipe 6, and the pouring amount of the 6061 aluminum alloy liquid is controlled to be one-fourth of the volume of the 7075 aluminum alloy substrate. At the same time, the pressure punch 2 is adjusted by the control system 13 to press downward into the solid metal preheating cavity 12, and the pressure is stopped when the pressure reaches 60Mpa and the pressure is maintained for 5 minutes;

[0032] Step 4: After the pressure holding is completed, the pressure punch 2 is adjusted by the control system 12 to exit the solid metal preheating cavity 12;

[0033] Step 5: adjusting the movable pressure mold cavity base 10 through the control system 12 so that the lower end of the solid metal preheating mold 12 is in a state without a base;

[0034] Step six: the pressure punch 2 is adjusted again through the control system 12 so that the pressure punch 2 pushes the 7075 / 6061 aluminum alloy bimetallic composite material out of the solid metal preheating film cavity 12 to achieve demolding.

[0035] Step 7: The movable pressure cavity base 10 is adjusted back to the initial position through the control system 12, and other systems are turned off, and the preparation of the 7075 / 6061 aluminum alloy bimetallic composite material is completed.

[0036] The obtained material was observed under a scanning electron microscope and it was found that the interface of the composite material was well bonded and there were no obvious defects. Figure 3 shown.

[0037] Example 2

[0038] like Figure 1 , Figure 2 As shown, the present invention discloses a preparation device for a bimetallic composite material, which consists of four parts: a pressurizing system, a liquid metal heating system, a solid metal preheating system, and a control system. The pressurizing system mainly includes a press machine body 1 and a pressure punch 2; the liquid metal heating system mainly includes a liquid metal insulation chamber 7 and a liquid metal heating base 9; the solid metal preheating system mainly includes a solid metal preheating cavity 12 and a heating resistor 11. The device also includes a control system 13, a pressure cavity fixing plate 3, a pressure cavity fixing column 4, a device base 5, a movable pressure cavity base 10, a liquid metal guide groove a 8, a liquid metal guide groove b 14, and a liquid metal guide pipe 6.

[0039] The press body is located on the device base 5; the pressure punch 2 is installed on the top of the press body 1 and is coaxial with the solid metal preheating mold cavity 12; the liquid metal heating base 9 is located above the device base 5; the liquid metal insulation chamber 7 is located above the liquid metal heating base 9; the liquid metal guide groove a 8 is located directly below the liquid metal insulation chamber 7 and is inside the liquid metal heating base 9; the liquid metal guide groove b 14 is located inside the solid metal preheating mold cavity 12, and the two ends of the liquid metal guide groove b 14 are tangent to the upper surface and the inner cavity wall of the solid metal preheating mold cavity 12 respectively; the pressure mold fixing plate 3 is fixed to the solid metal preheating mold cavity 12; the pressure mold cavity fixing columns 4 are respectively located around the pressure mold cavity fixing plate 3 and fixed thereto, and their lower ends are fixed to the device base 5; the heating resistor 11 is located in the outer cavity of the solid metal preheating mold cavity 12; the two ends of the liquid metal guide pipe 6 are respectively at the liquid metal guide groove a 8 and the liquid metal guide groove b movable pressure cavity base 10 is located directly below the solid metal preheating cavity 12; the control system 13 is placed on the outer surface of the device base 5.

[0040] The method for preparing the Al / Cu bimetallic composite material using the above device is achieved by the following steps:

[0041] Step 1: The control system 13 is used to adjust the heating of the liquid metal heating base 9 so that the pure aluminum in the liquid metal insulation chamber 7 is melted and kept at 700° C.;

[0042] Step 2: Place the pure copper substrate into the solid metal pressure mold cavity 12, heat the heating resistor 11 in the solid metal mold cavity 12 through the control system 13, and set the insulation temperature to 400° C.;

[0043] Step 3: When the pure aluminum in the liquid metal insulation chamber 7 and the pure copper substrate in the solid metal preheating cavity 12 reach the predetermined preparation temperature, the control system 13 is used to adjust the liquid metal guide groove a 8 and the liquid metal guide groove b 14 to an open state, so that the pure aluminum liquid is evenly poured on the surface of the pure copper substrate through the liquid metal guide tube 6, and the amount of pure aluminum liquid poured is controlled to be one-fourth of the volume of the pure copper substrate. At the same time, the pressure punch 2 is adjusted by the control system 13 to press downward into the solid metal preheating cavity 12, and the pressure is stopped when the pressure reaches 55Mpa and the pressure is maintained for 6 minutes;

[0044] Step 4: After the pressure holding is completed, the pressure punch 2 is adjusted by the control system 12 to exit the solid metal preheating cavity 12;

[0045] Step 5: adjusting the movable pressure mold cavity base 10 through the control system 12 so that the lower end of the solid metal preheating mold 12 is in a state without a base;

[0046] Step six: the pressure punch 2 is adjusted again through the control system 12 so that the pressure punch 2 pushes the Al / Cu bimetallic composite material out of the solid metal preheating film cavity 12 to achieve demolding.

[0047] Step 7: The movable pressure mold cavity base 10 is adjusted back to the initial position through the control system 12, and other systems are turned off, and the preparation of the Al / Cu bimetallic composite material is completed.

[0048] The obtained material was observed under a scanning electron microscope and it was found that the interface of the composite material was well bonded and had no obvious defects. Figure 4 shown.

[0049] The bimetallic composite material prepared in the above example was subjected to a shear strength test using a room temperature tensile testing machine for metal materials of model GB / T228-2010, wherein the tensile rate was 1 mm / min. The test results are shown in Table 1.

[0050] Table 1 Ultimate shear strength of different embodiments

[0051] name Ultimate shear strength(Mpa) Example 1 82 Example 2 64

[0052] The bimetallic composite material prepared in the above example was subjected to microhardness test using a fully automatic microhardness tester model FM-ARS900, where the test load was 100g and the duration was 15s. The measurement results are shown in Table 2, where the experimental data shown above must be measured 7 times and the average value is taken as the final experimental value. It can be seen that the hardness of the composite material prepared by this device is significantly improved.

[0053] Table 2 Microhardness of different examples

[0054]

[0055]

[0056] As can be seen from the above-mentioned embodiments, the device of the present invention can be used to prepare a bimetallic composite material with good interface bonding strength.

[0057] The implementation methods of the present invention are not limited to the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention should be considered as equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A preparation device for a bimetallic composite material, characterized in that: The device includes a pressurizing system, a liquid metal heating system, a solid metal preheating system, a control system, a pressure mold cavity fixing plate, a pressure mold cavity fixing column, a device base, a movable pressure mold cavity base, a liquid metal guide groove a, a liquid metal guide groove b, and a liquid metal guide pipe; The pressurizing system includes a press body and a pressure punch; the liquid metal heating system includes a liquid metal insulation chamber and a liquid metal heating base; the solid metal preheating system includes a solid metal preheating cavity and a heating resistor; The press body is located on the device base; the pressure punch is installed on the top of the press body and is coaxial with the solid metal preheating cavity; the liquid metal heating base is located above the device base; the liquid metal insulation chamber is located above the liquid metal heating base; the liquid metal guide groove a is located directly below the liquid metal insulation chamber and inside the liquid metal heating base; the liquid metal guide groove b is located inside the solid metal preheating cavity, and the two ends of the liquid metal guide groove b are tangent to the upper surface and the inner cavity wall of the solid metal preheating cavity respectively; the pressure cavity fixing plate is fixed to the solid metal preheating cavity; the pressure cavity fixing columns are respectively located around the pressure cavity fixing plate and fixed thereto, and the lower ends of the pressure cavity fixing columns are fixed to the device base; the heating resistor is located in the outer cavity of the solid metal preheating cavity; the two ends of the liquid metal guide pipe are respectively connected to the liquid metal guide groove a and the liquid metal guide groove b; the movable pressure cavity base is located directly below the solid metal preheating cavity; the control system is placed on the outer surface of the device base.

2. A method for preparing a bimetallic composite material using the device as claimed in claim 1, characterized in that: The specific steps are as follows: Step 1: The control system is used to adjust the heating of the liquid metal heating base so that the liquid metal in the liquid metal insulation chamber is melted and kept warm at a certain temperature; Step 2: Put the solid metal into the solid metal preheating cavity, heat the heating resistor in the solid metal preheating cavity through the control system, and set the insulation temperature; Step 3: When the liquid metal in the liquid metal insulation chamber and the solid metal in the solid metal preheating film cavity reach the predetermined preparation temperature, the liquid metal guide groove a and the liquid metal guide groove b are adjusted to an open state through the control system, so that the liquid metal is evenly poured on the surface of the solid metal through the liquid metal guide pipe. At the same time, the pressure punch is adjusted by the control system to press downward into the solid metal preheating mold cavity, and the pressure is stopped and maintained after the set pressure is reached; Step 4: After the pressure holding is completed, the pressure punch is adjusted by the control system to exit the solid metal preheating die cavity; Step 5: adjusting the movable pressure cavity base through the control system so that the lower end of the solid metal preheating cavity is in a base-free state; Step 6: The pressure punch is adjusted again through the control system so that the pressure punch pushes the bimetallic composite material out of the solid metal preheating film cavity to achieve demolding; Step 7: The movable pressure cavity base is adjusted back to the initial position through the control system, and other systems are turned off, and the preparation of the bimetallic composite material is completed.

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