A pulsating aging treatment test method and device

Abstract

The application discloses a pulsating aging treatment test method and device. The method comprises the following steps: continuously aging a workpiece A for H hours and measuring the performance value Wa; pulsating aging a workpiece B for H hours and measuring the performance value Wb; and comparing the performance value Wa and the performance value Wb. The device is suitable for the above method and comprises an oil bath pool, a wind cooling fan and a material frame installed on the upper side of the oil bath pool, the workpiece B is contained in the material frame and is immersed in the oil bath pool to be heated or is opposite to the wind cooling fan to be cooled. Through the setting of steps S1 and S2, the effect standard of the aging treatment can be established, the effect standard is characterized by the performance value Wa, through the setting of steps S3 and S4, the effect of the pulsating aging treatment with the equivalent aging treatment time can be obtained, the effect is characterized by the performance value Wb, and through the comparison of the performance value Wb and the performance value Wa, whether the effect of the pulsating aging treatment has the cumulative effect can be known.

Description

Technical Field

[0001] This invention relates to the field of material heating and aging treatment technology, and in particular to a method and apparatus for pulsating aging treatment testing. Background Technology

[0002] In high-strength aluminum alloy friction stir welding, the dissolution of strengthening phases inevitably leads to a decrease in weld strength. To address this, aging treatment is necessary. Current technologies employ continuous heating for continuous aging, which causes heat to continuously diffuse from the weld to the base material. Since the heat is continuously transferred from the outside, the base material cannot dissipate heat quickly enough, resulting in excessive deformation due to widespread heating and over-aging of the base material. To address these issues, some researchers have proposed pulsed aging treatment (multiple cycles of heating-holding-cooling within a short period) to replace continuous aging. This allows the base material to dissipate heat rapidly during the cooling phase, preventing heat accumulation and diffusion within the workpiece, thus resolving excessive deformation and over-aging of the base material caused by excessive heating. To determine whether multiple short-term aging treatments can replace continuous heating, the cumulative effect of aging treatment must be verified, confirming that the performance improvements gained during the heating-holding process are not lost during cooling. However, existing technologies do not have relevant testing methods and devices. Therefore, there is an urgent need for a testing method and device for pulsating aging treatment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method and apparatus for pulsating aging treatment test.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A method for pulsating aging treatment testing includes the following steps:

[0006] Step S1: Perform continuous aging treatment on metal workpiece A;

[0007] Step S2: When the continuous aging treatment time of the workpiece A is H, its performance value Wa is measured;

[0008] Step S3: Perform pulsed aging treatment on workpiece B, which has the same specifications as workpiece A.

[0009] Step S4: When the cumulative duration of the pulsation aging treatment of the workpiece B is H, its performance value Wb is measured.

[0010] Step S5: Compare the performance value Wa and the performance value Wb.

[0011] As a further improvement to the above technical solution:

[0012] Step S1 includes:

[0013] Step S11: Heating the workpiece A at temperature S1;

[0014] Step S12: When the temperature reaches S2, keep the workpiece A warm.

[0015] Step S3 includes:

[0016] Step S31: Heat the workpiece B at temperature S1;

[0017] Step S32: When the temperature reaches S2, keep the workpiece B warm;

[0018] Step S33: Cool the workpiece B to a temperature of S1;

[0019] Step S34, repeat steps S31 to S33.

[0020] In step S31, the heating time of the workpiece B is 0-1 minute.

[0021] In step S32, the heat preservation time of the workpiece B is 1-10 minutes.

[0022] In step S33, the cooling time of workpiece B is 0-2 minutes.

[0023] The pulsation aging treatment test method also includes:

[0024] Step S6: Change H, and repeat steps S1 to S5.

[0025] The heating method for workpiece A and / or workpiece B is an oil bath.

[0026] The cooling method for workpiece B is air cooling.

[0027] Then, the present invention discloses a pulse aging treatment test device, which is applicable to the above-mentioned pulse aging treatment test method. The device includes an oil bath, an air-cooling fan and a vertically movable material frame installed on the upper side of the oil bath. The workpiece B is placed in the material frame. The workpiece B moves down with the material frame to be immersed in the oil bath for heating, or moves up to face the air-cooling fan for cooling.

[0028] Compared with the prior art, the advantages of the present invention are as follows:

[0029] By setting steps S1 and S2, an effect standard for time-effect treatment can be established, characterized by a performance value Wa. By setting steps S3 and S4, the effect of a pulsed time-effect treatment with an equivalent time-effect treatment duration can be obtained, characterized by a performance value Wb. By comparing performance values ​​Wb and Wa, it can be determined whether the effect of the pulsed time-effect treatment has a cumulative effect, filling the gap in the existing technology for experimental methods to verify whether the pulsed time-effect treatment has a cumulative effect. Attached Figure Description

[0030] Figure 1 This is a flowchart illustrating the pulsating aging treatment test method;

[0031] Figure 2 It is a graph showing the hardness change of the workpiece after continuous aging treatment and pulsed aging treatment;

[0032] Figure 3 It is a graph showing the change in tensile strength of the workpiece after continuous aging treatment and pulsating aging treatment;

[0033] Figure 4 This is a front view schematic diagram of the pulsating aging treatment test device;

[0034] Figure 5 This is a side view schematic diagram of the pulsating aging treatment test device.

[0035] The labels in the diagram represent: 1. Oil bath; 2. Air-cooled fan; 3. Material frame; 4. Frame; 5. Telescopic rod. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 3 As shown, the pulsation aging treatment test method of this embodiment includes the following steps:

[0038] Step S1: Perform continuous aging treatment on metal workpiece A;

[0039] Step S2: When the continuous aging treatment time of workpiece A is H, its performance value Wa is measured.

[0040] Step S3: Perform pulsed aging treatment on workpiece B, which has the same specifications as workpiece A.

[0041] Step S4: When the cumulative duration of the pulsation aging treatment of workpiece B is H, its performance value Wb is measured.

[0042] Step S5: Compare performance value Wa and performance value Wb.

[0043] By setting steps S1 and S2, workpiece A undergoes continuous aging treatment as in the prior art, and the performance value Wa when the continuous aging treatment duration is H is used as the standard value. Then, by setting steps S3 and S4, workpiece B undergoes pulsed aging treatment, that is, workpiece B undergoes multiple cycles of heating-holding-cooling treatment. When the cumulative duration of the pulsed aging treatment of workpiece B reaches H, that is, when the cumulative duration of the heating-holding stage of workpiece B reaches H, its performance value Wb is measured as a comparison value. In step S5, the performance value Wb is compared with the performance value Wa. When the performance value Wb is better than or equal to the performance value Wa, or when the performance value Wb is worse than the performance value Wa but still within the preset threshold range, it can be determined that the effect of pulsed aging treatment has a cumulative effect; otherwise, it does not have a cumulative effect. In other words, by setting steps S1 and S2, an effect standard for time-effect treatment can be established, which is characterized by the performance value Wa. By setting steps S3 and S4, the effect of pulsating time-effect treatment with an equivalent time-effect treatment duration can be obtained, which is characterized by the performance value Wb. By comparing the performance value Wb and the performance value Wa, it can be determined whether the effect of pulsating time-effect treatment has a cumulative effect, filling the gap in the existing technology for experimental methods to verify whether pulsating time-effect treatment has a cumulative effect.

[0044] In this embodiment, step S1 includes:

[0045] Step S11: Heat workpiece A at temperature S1;

[0046] Step S12: When the temperature reaches S2, keep workpiece A warm.

[0047] Typically, S1 is room temperature, and S2 is the aging treatment temperature set according to the workpiece material. By setting steps S11 and S12, workpiece A, which is at room temperature, can be heated to the aging treatment temperature that matches the material properties, and then held at that temperature for continuous aging treatment. Specifically, the continuous aging treatment duration H is the sum of the heating and holding times of workpiece A, and H ranges from 2 to 24 hours.

[0048] In this embodiment, step S3 includes:

[0049] Step S31: Heat workpiece B at temperature S1;

[0050] Step S32: When the temperature reaches S2, keep workpiece B warm.

[0051] Step S33: Cool workpiece B to temperature S1;

[0052] Step S34, repeat steps S31 to S33.

[0053] Typically, S1 represents room temperature, and S2 represents the aging treatment temperature set according to the workpiece material. Since the aging treatment performance of workpiece B needs to be compared with that of workpiece A, in this experiment, workpiece B and workpiece A are in the same room temperature environment, i.e., S1 is the same. Furthermore, because workpiece B and workpiece A have the same specifications (material, structure, shape, size, etc.), S2 is also the same. In other words, the temperature rise of workpiece B and workpiece A is consistent. By setting steps S31 and S32, workpiece B, which is at room temperature, can be heated to the aging treatment temperature that matches the material characteristics and held at that temperature for aging treatment. The duration of this process is shorter than H. Furthermore, by setting step S33, the workpiece is removed from the previous aging treatment cycle and restored to room temperature, preparing for the next aging treatment cycle. Finally, by setting step S34, the workpiece B, which is at room temperature, is heated again to the aging treatment temperature that meets the material properties, and then kept at that temperature for aging treatment, starting the next aging treatment cycle, and so on, until the cumulative pulsating aging treatment time of workpiece B reaches H.

[0054] In this embodiment, in step S31, the heating time of workpiece B is 0-1 minute. In step S32, the holding time of workpiece B is 1-10 minutes. In step S33, the cooling time of workpiece B is 0-2 minutes. The heating and cooling times of workpiece B should be as short as possible under the existing heat source and heat dissipation conditions to reduce the error in calculating the aging time caused by heating and cooling in each cycle. At the same time, the holding time of workpiece B is controlled within 1-10 minutes to provide an optimized local aging strengthening process for large structural components that cannot be heat-treated as a whole. Excessive holding time will cause the overall temperature of the large component to rise, resulting in over-aging of parts that do not need strengthening.

[0055] In this embodiment, the pulsation aging treatment test method further includes:

[0056] Step S6: Change H, and repeat steps S1 to S5.

[0057] Since performance values ​​Wa and Wb primarily use the workpiece's hardness and tensile strength as performance indicators, and both hardness and tensile strength measurements require destructive testing, workpiece A with a measured Wa value and workpiece B with a measured Wb value can only reflect the aging effect for a corresponding aging time H. To obtain comparative results of aging effects for different aging time Hs, multiple tests must be conducted. By setting step S6, repeated tests are performed on several workpieces A and B, and by changing H, comparative results of aging effects for several different aging time Hs can be obtained.

[0058] In this embodiment, workpiece A and / or workpiece B are heated by an oil bath. When heating workpieces in an oil bath, the workpieces are completely immersed in the oil, which allows for uniform heating throughout the workpiece. Furthermore, the high boiling point and excellent temperature control of the oil allow for a significant temperature rise in the workpiece, while maintaining a relatively stable oil temperature even after immersion. Specifically, dimethyl silicone oil can be used as the oil.

[0059] In this embodiment, the cooling method for workpiece B is air cooling. Workpiece B needs to undergo multiple heating-holding-cooling cycles. In order to restore workpiece B to room temperature as quickly as possible during the cooling stage, thereby shortening the total time of the pulsed aging treatment, air blowing is used to accelerate heat dissipation.

[0060] like Figure 4 and Figure 5 As shown, the present invention further discloses a pulsed aging treatment test apparatus. In one embodiment, the pulsed aging treatment test apparatus is applicable to the above-mentioned pulsed aging treatment test method and includes an oil bath 1. A fan-cooled fan 2 and a vertically movable material frame 3 are installed on the upper side of the oil bath 1. The workpiece B is placed in the material frame 3. The workpiece B moves downward with the material frame 3 to be immersed in the oil bath 1 for heating, or moves upward to face the fan-cooled fan 2 for cooling. By setting the vertically movable material frame 3, when it moves downward, the workpiece placed in it can be completely immersed in the oil in the oil bath 1 to achieve heating. When it moves upward, the workpiece placed in it can face the fan-cooled fan 2 for cooling.

[0061] Furthermore, the pulse aging treatment test device also includes a frame 4. The lower end of the frame 4 is fixed with an oil bath 1, and the upper end is fixed with a telescopic rod 5. The fixed end of the telescopic rod 5 is connected to the frame 4, the free end faces downward and is directly opposite the oil bath 1, and a material frame 3 is hung there. A fan 2 is provided in the middle of the frame 4. The telescopic rod 5 drives the material frame 3 to move vertically through telescopic movement, so that the workpiece contained in the material frame 3 is completely immersed in the oil bath 1 or directly opposite the fan 2.

[0062] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A method for testing pulsating aging treatment, characterized in that, Includes the following steps: Step S1: Perform continuous aging treatment on metal workpiece A; Step S2: When the continuous aging treatment time of the workpiece A is H, its performance value Wa is measured; Step S3: Perform pulsed aging treatment on workpiece B, which has the same specifications as workpiece A. Step S4: When the cumulative duration of the pulsation aging treatment of the workpiece B is H, its performance value Wb is measured. Step S5: Compare the performance value Wa and the performance value Wb.

2. The pulsation aging treatment test method according to claim 1, characterized in that: Step S1 includes: Step S11: Heating the workpiece A at temperature S1; Step S12: When the temperature reaches S2, keep the workpiece A warm.

3. The pulsation aging treatment test method according to claim 1, characterized in that: Step S3 includes: Step S31: Heat the workpiece B at temperature S1; Step S32: When the temperature reaches S2, keep the workpiece B warm; Step S33: Cool the workpiece B to a temperature of S1; Step S34, repeat steps S31 to S33.

4. The pulsation aging treatment test method according to claim 3, characterized in that: In step S31, the heating time of the workpiece B is 0-1 minute.

5. The pulsation aging treatment test method according to claim 3, characterized in that: In step S32, the heat preservation time of the workpiece B is 1-10 minutes.

6. The pulsation aging treatment test method according to claim 3, characterized in that: In step S33, the cooling time of workpiece B is 0-2 minutes.

7. The pulsation aging treatment test method according to any one of claims 1-6, characterized in that: The pulsation aging treatment test method also includes: Step S6: Change H, and repeat steps S1 to S5.

8. The pulsation aging treatment test method according to any one of claims 1-6, characterized in that: The heating method for workpiece A and / or workpiece B is an oil bath.

9. The pulsation aging treatment test method according to any one of claims 1-6, characterized in that: The cooling method for workpiece B is air cooling.

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