Simple device and method for measuring aluminum melting loss resistance of metal material

Abstract

The invention relates to a simple device and method for measuring aluminum melting loss resistance of a metal material, and belongs to the field of experimental equipment.The simple device comprises a box-type furnace and a motor, the motor is inversely arranged over the box-type furnace, a crucible, a sample holder and a metal hook are arranged in the box-type furnace from bottom to top, and the bottom of the sample holder capable of containing a plurality of standard samples is located on the inner side of the crucible; a vertically arranged metal hook is connected with the top of the sample rack, a metal support is connected between a rotating shaft of the motor and the top of the metal hook, and the metal support penetrates through the top of the box-type furnace. According to the invention, simple equipment components are designed, and the overall structure of the equipment is simplified, so that the purpose of testing under general laboratory conditions is achieved. According to the method, the accuracy is considered while the equipment is simplified, the aluminum melting loss resistance of two samples can be tested in the same test, and the accuracy of a test result is improved by adopting a comparison test and comparing the aluminum melting loss resistance of different materials under the same condition.

Description

Technical Field

[0001] The present invention designs a simple device for measuring the aluminum melting loss resistance of metal materials. The core of the invention is to provide a simple device for measuring the aluminum melting loss resistance of metal materials that can be built and used in an ordinary laboratory, and belongs to the field of experimental equipment. Background Art

[0002] The aluminum melting resistance of metal materials is one of the important indicators for evaluating their use as aluminum alloy die-casting mold materials. The high temperature environment in the aluminum alloy die-casting process places strict requirements on mold materials, among which the aluminum melting resistance directly affects the service life of the mold and the quality of the casting. However, traditional metal aluminum melting resistance test equipment usually has problems such as complex structure, high requirements for the experimental environment, and expensive equipment costs. These limitations make it difficult for many ordinary laboratories and small factories to afford the cost and technical difficulty of purchasing and building a complete test system.

[0003] At present, the high cost and high technical requirements of metal aluminum melting resistance test equipment have become a bottleneck restricting the development of related fields. For many small and medium-sized enterprises, the high threshold of traditional equipment makes it impossible for them to conduct efficient and comprehensive material performance evaluation. This not only affects the research efficiency of the laboratory, but also limits the company's technological innovation and product improvement in the field of aluminum alloy die casting. Therefore, simplifying the design of existing test equipment, reducing costs and reducing operational difficulty have become technical challenges that need to be solved urgently.

[0004] Therefore, this field urgently needs a simpler, more economical and efficient device that can accurately and quickly measure the aluminum melting loss resistance of metal materials. This new device should not only have high test accuracy and reliability, but also have low cost and simpler operation mode, so that it can be widely used in laboratories and production plants of different sizes, thereby promoting the further development of aluminum alloy die-casting technology. Summary of the invention

[0005] The purpose of the present invention is to develop a type of aluminum melting loss resistance testing equipment which is simple in equipment, easy to build and can also accurately test the aluminum melting loss resistance of metal materials, thereby realizing aluminum melting loss resistance testing under simple conditions.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a simple device for measuring the aluminum melting loss resistance of metal materials, including a box-type furnace and a motor, wherein the motor is inverted directly above the box-type furnace, and a crucible, a sample rack and a metal hook are arranged inside the box-type furnace from bottom to top, and the bottom of the sample rack for placing multiple standard samples is located inside the crucible, and the vertically arranged metal hook is connected to the top of the sample rack, and a metal bracket is connected between the rotating shaft of the motor and the top of the metal hook, and the metal bracket passes through the top of the box-type furnace.

[0007] Preferably, a plurality of hooks are provided at the bottom of the metal hook, and a connection structure corresponding to the number of hooks is provided at the top of the sample rack.

[0008] Preferably, a bracket fixing device is provided above the box-type furnace, and the metal bracket passes through the bracket fixing device.

[0009] Preferably, the rotating shaft of the motor, the metal bracket and the through hole of the bracket fixing device are in the same straight line.

[0010] Preferably, an exhaust hole is provided on the top of the box-type furnace.

[0011] Preferably, the standard sample is in the shape of a cylinder, and a through hole is provided on one side.

[0012] Preferably, the sample holder is provided with a metal wire for connecting to a through hole of the standard sample.

[0013] Preferably, the motor speed is 200r / min.

[0014] Preferably, the metal bracket, the metal hook and the sample rack are made of metal materials with high strength and good high temperature performance.

[0015] The technical solution of the present invention also provides a simple device and method for measuring the aluminum melting loss resistance of metal materials. The simple device for measuring the aluminum melting loss resistance of metal materials comprises the following steps:

[0016] Step 1, making and installing the standard sample;

[0017] Step 2: assemble the equipment;

[0018] Step 3, preparing aluminum liquid;

[0019] Step 4: Conduct the experiment;

[0020] Step 5: Sample processing and quality measurement.

[0021] Compared with the existing equipment, the present invention has the following beneficial effects:

[0022] 1. Compared with the existing metal aluminum melting resistance performance test equipment, the present invention simplifies the overall structure of the equipment by designing simple equipment components to achieve the purpose of testing under general laboratory conditions. While simplifying the equipment, accuracy is taken into account. The aluminum melting resistance performance of two samples can be tested in the same test. By using comparative testing, the aluminum melting resistance performance of different materials under the same conditions is compared to improve the accuracy of the test results.

[0023] 2. The simple, easy-to-build and relatively accurate equipment designed by the present invention for testing the aluminum melting resistance of metal materials provides a design basis for further developing and improving the testing equipment for this experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the assembly of equipment components in a simple device and method for measuring the aluminum melting loss resistance of metal materials according to the present invention;

[0025] Figure 2 It is a structural schematic diagram of a motor in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0026] Figure 3 It is a structural schematic diagram of a metal bracket in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0027] Figure 4 It is a structural schematic diagram of a bracket fixing device in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0028] Figure 5 It is a structural schematic diagram of a metal hook in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0029] Figure 6 It is a structural schematic diagram of a sample holder in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0030] Figure 7 It is a structural schematic diagram of a crucible in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0031] Figure 8 It is a structural schematic diagram of a standard sample in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0032] Fig. 9 It is a structural schematic diagram of placing a standard sample on a sample rack in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0033] Fig.10 A schematic diagram of the weight loss of a standard sample before and after an experiment in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention;

[0034] Fig.11 The optical microscope metallographic diagram of the metal-aluminum transition layer of a standard sample in a simple device and method for measuring the aluminum melting loss resistance of a metal material according to the present invention.

[0035] Figure numerals: 1. motor; 2. metal bracket; 3. bracket fixing device; 4. metal hook; 5. sample rack; 6. crucible; 7. standard sample; 8. box furnace; 9. exhaust hole. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The embodiment of the present invention discloses an anti-aluminum melting loss test device composed of simple components. The components of the device include: a motor 1, a metal bracket 2, a bracket fixing device 3, a metal hook 4, a sample rack 5, a crucible 6, a box furnace 8, etc. The various components of the equipment meet specific design standards and are operated according to standardized experimental procedures. By using the equipment and experimental methods, after the metal sample is specifically treated, its weight loss change caused by aluminum liquid erosion in the aluminum melting loss experiment and the morphology of the metal-aluminum transition layer can be measured, thereby evaluating the aluminum melting loss resistance of the metal material. The experimental equipment and its design standards belong to the field of experimental equipment, and aim to provide a simple and effective testing method for the research of aluminum alloy die-casting mold materials. The schematic diagram and important dimensions of the relevant components can be referred to Figures 2 to 9 .

[0038] The specific functions of each component are as follows:

[0039] 1. Motor 1: Motor 1 is used to drive the metal bracket 2, the metal hook 4 and the sample holder 5 to rotate at a constant speed, so that the metal sample rotates at a constant speed in the molten aluminum liquid, so that the aluminum liquid continuously impacts the surface of the metal sample.

[0040] 2. Metal bracket 2: The metal bracket 2 connects the motor 1 and the metal hook 4, and plays the role of connecting and transmitting the rotational force.

[0041] 3. Metal hook 4: Two hooks are provided at the bottom of the metal hook 4 for hanging the sample rack 5 to ensure that the sample rack 5 remains stably suspended during the experiment.

[0042] 4. Sample rack 5: The sample rack 5 is used to hang two test metal samples, so that a comparative experiment of different materials can be carried out simultaneously under the same conditions. Two connecting structures for connecting hooks are arranged on the top of the sample rack 5.

[0043] 5. Bracket fixing device 3: This device is used to fix the metal bracket 2, limit its non-axial shaking during rotation, and ensure that the metal sample is more stable during the rotation process.

[0044] 6. Crucible 6: Crucible 6 is a container for molten aluminum liquid, which contains the aluminum liquid and provides enough space for the metal sample to be immersed.

[0045] 7. Box furnace 8: Box furnace 8 is used to provide a high temperature experimental environment to ensure that the aluminum liquid is maintained in a proper molten state.

[0046] In order to ensure the normal assembly of the equipment and the smooth progress of the experiment, each component needs to meet the following requirements:

[0047] 1. Box-type furnace 8: The top of the box-type furnace 8 should have an exhaust hole 9, and the insulation material on the top of the furnace should have a hole of appropriate size so that the metal bracket 2 can extend from the top of the box-type furnace 8 into the furnace.

[0048] 2. Motor 1: Since the motor 1 needs to be installed upside down on the top of the box furnace 8, its size should be appropriate to avoid affecting the installation space by being too large. The motor 1 should be small and have a suitable speed. Too fast a speed may cause aluminum liquid to splash, and too slow a speed will make the metal sample unable to overcome the resistance of aluminum liquid to rotate. In this embodiment, after repeated tests and adjustments, the optimal speed was finally determined to be 200r / min.

[0049] 3. Metal bracket 2, metal hook 4 and sample holder 5: These components should be made of high-strength metal materials with good high-temperature performance to ensure that they will not deform too much in a high-temperature experimental environment.

[0050] 4. Bracket fixing device 3: A small hole with a diameter slightly larger than that of the metal bracket 2 should be opened on the device. During assembly, the metal bracket 2 is passed through the small hole to fix the rotating axis of the metal bracket 2.

[0051] 5. Crucible 6: The diameter of the crucible 6 should be large enough to ensure that the metal sample does not contact the crucible 6 when the sample holder 5 rotates. The depth of the crucible 6 should also be sufficient to ensure that the metal sample can fully contact the molten aluminum liquid to perform an effective aluminum melting loss resistance test.

[0052] Through the above design, the present invention provides a simple-structured, low-cost aluminum melting resistance testing device, which can meet the needs of laboratories and small factories, and is conducive to more extensive research and testing of the aluminum melting resistance performance of metal materials.

[0053] Furthermore, the present invention discloses a method for using a simple device for measuring the aluminum melting loss resistance of metal materials, and the specific steps are as follows:

[0054] Step 1: Make and install standard sample 7

[0055] First, select metal sample A and metal sample B and make two standard samples 7 respectively. The specification of standard sample 7 is a cylinder with a diameter of 10mm and a height of 55mm, and a circular through hole on one side. Before clamping, use an analytical balance to weigh the mass of each standard sample 7 separately, and record its initial mass for subsequent evaluation of the weight loss of the sample in the experiment. After the weighing is completed, insert the standard sample 7 into the circular hole of the sample holder 5 of the equipment, and connect the sample holder 5 to the through hole of the standard sample 7 with a wire to ensure that the sample is firmly installed. The dimensions of the standard sample 7 and the schematic diagram of its installation process can be seen in Figure 8 , Fig. 9 .

[0056] Step 2: Equipment Assembly

[0057] Assemble the equipment in the following order: first install the motor 1, and fix the metal bracket 2 on the rotating head of the motor 1. Next, extend the metal bracket 2 into the furnace through the exhaust hole 9 of the box furnace 8, and fix the motor 1 above the exhaust hole 9. Then, build the bracket fixture 3 above the exhaust hole 9 so that the rotating shaft of the motor 1, the metal bracket 2 and the through hole on the bracket fixture 3 are on the same straight line. At this time, pass the metal bracket 2 through the through hole of the bracket fixture 3, and after it is fixed, use iron wire to connect the metal hook 4 and the metal bracket 2. Finally, place the crucible 6 under the metal hook 4. The schematic diagram after the equipment is assembled can be seen in Figure 1 .

[0058] Step 3: Prepare the aluminum liquid required for the experiment

[0059] According to the experimental requirements, calculate the required amount of aluminum liquid so that the aluminum liquid level is about 10mm below the mouth of the crucible 6. According to the calculation results, put the required weight of aluminum ingot into the crucible 6. Then adjust the height of the metal hook 4 so that after the sample holder 5 is hung, about 30mm of the standard sample is immersed in the aluminum liquid. After the equipment height adjustment is completed, set the heating program of the box furnace 8: heat from room temperature (RT) to 700℃, and then keep warm for 8 hours or more. After the setting is completed, close the furnace door and start heating. When the temperature of the box furnace 8 reaches 700℃ and maintains the temperature for 4 hours, the aluminum liquid will be completely melted.

[0060] Step 4: Conduct the experiment

[0061] At this time, open the furnace door and quickly hang the sample rack 5, so that the standard sample is immersed in the molten aluminum liquid. Then start the motor 1 and close the furnace door. Keep the temperature in the furnace at 700℃, so that the standard sample is partially immersed in the aluminum liquid and rotates for 4 hours. After the experiment, immediately take out the standard sample together with the sample rack 5 and air cool it.

[0062] Step 5: Sample processing and quality measurement

[0063] After standard sample A and standard sample B have been cooled, remove the samples and place them in a saturated sodium hydroxide solution to dissolve the aluminum attached to the sample surface. After the solution is completely dissolved and no bubbles are generated on the sample surface, take out the sample, wash it and dry it. Use an analytical balance to weigh the mass of the standard sample after the experiment and compare it with the mass before the experiment to calculate the weight loss of the sample caused by aluminum melting loss. For example, the mass of standard sample A before the experiment was 34.41g, the mass after the experiment was 26.25g, and the weight loss was 8.16g; the mass of standard sample B before the experiment was 33.61g, the mass after the experiment was 28.59g, and the weight loss was 6.02g; it can be preliminarily judged that the aluminum melting loss resistance of metal B is better than that of metal A. In addition, the cross section of some standard sample 7 can be cut to observe the metal-aluminum transition layer caused by aluminum melting loss, so as to further evaluate the metal's aluminum melting loss resistance.

[0064] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A simple device for measuring the aluminum melting resistance of metal materials, characterized in that: The invention comprises a box-type furnace (8) and a motor (1), wherein the motor (1) is inverted and placed directly above the box-type furnace (8), and a crucible (6), a sample rack (5) and a metal hook (4) are arranged inside the box-type furnace (8) from bottom to top. The bottom of the sample rack (5) for placing a plurality of standard samples (7) is located inside the crucible (6), and the vertically arranged metal hook (4) is connected to the top of the sample rack (5). A metal bracket (2) is connected between the rotating shaft of the motor (1) and the top of the metal hook (4), and the metal bracket (2) passes through the top of the box-type furnace (8).

2. A simple device for measuring the aluminum melting resistance of metal materials according to claim 1, characterized in that: The bottom of the metal hook (4) is provided with a plurality of hooks, and the top of the sample rack (5) is provided with a connection structure corresponding to the number of the hooks.

3. A simple device for measuring the aluminum melting resistance of metal materials according to claim 1, characterized in that: A support fixing device (3) is provided above the box-type furnace (8), and the metal support (2) passes through the support fixing device (3).

4. A simple device for measuring the aluminum melting resistance of metal materials according to claim 3, characterized in that: The rotating shaft of the motor (1), the metal bracket (2) and the through hole of the bracket fixing device (3) are located in the same straight line.

5. A simple device for measuring the aluminum melting resistance of metal materials according to claim 1, characterized in that: An exhaust hole (9) is provided on the top of the box-type furnace (8).

6. A simple device for measuring the aluminum melting resistance of metal materials according to claim 1, characterized in that: The standard sample (7) is in the shape of a cylinder and has a through hole on one side.

7. A simple device for measuring the aluminum melting resistance of metal materials according to claim 6, characterized in that: The sample holder (5) is provided with a metal wire for connecting to a through hole of the standard sample (7).

8. A simple device for measuring the aluminum melting resistance of metal materials according to claim 1, characterized in that: The motor (1) has a rotation speed of 200 r / min.

9. A simple device for measuring the aluminum melting resistance of metal materials according to claim 1, characterized in that: The metal bracket (2), the metal hook (4) and the sample rack (5) are made of metal materials with high strength and good high temperature performance.

10. A simple method for measuring the aluminum melting resistance of metal materials, characterized in that: A simple device for measuring the aluminum melting resistance of a metal material according to any one of claims 1 to 9 comprises the following steps: Step 1, making and installing the standard sample (7); Step 2: assemble the equipment; Step 3, preparing aluminum liquid; Step 4: Conduct the experiment; Step 5: Sample processing and quality measurement.

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