Device for stress corrosion of aluminum alloy

Abstract

The utility model discloses a device for stress corrosion of aluminum alloy, which comprises a workbench, the middle part of the workbench is provided with a concave corrosive liquid accommodating cavity, a bolt fastening device for fixing a sample is arranged in the corrosive liquid accommodating cavity, and a sensor is detachably arranged on the surface of the sample; the bolt fastening device comprises a bolt penetrating through the sample, and a nut is arranged at the end part of the bolt; the stress loading assembly is arranged on the upper side of the left end of the workbench, a plurality of wires are arranged on the stress loading assembly, and the stress loading assembly is connected with the sensor and the nut through the wires; and the display is arranged on the upper side of the right end of the workbench. The aluminum alloy stress corrosion device can solve the problems that an existing aluminum alloy stress corrosion device is complex in structure and cumbersome to operate, and the accuracy of a test result is poor due to inaccurate stress control and unstable sample fixation possibly existing in the operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aluminium alloy stress corrosion, specifically a device for aluminium alloy stress corrosion. BACKGROUND

[0002] Stress corrosion is one of the main reasons for component failure, and it is necessary to test the stress corrosion performance of materials that may work in related environments and use the test data as a reference for material stress corrosion performance indicators before design, production and use.

[0003] Aluminium alloys are prone to stress corrosion cracking in specific corrosive environments, which poses a threat to their safety of application. Existing test devices often have problems such as complex operation and inability to accurately control stress. In order to evaluate the stress corrosion sensitivity of aluminium alloy materials, a test device that can simulate actual working environment is needed. SUMMARY

[0004] The utility model provides a device for aluminium alloy stress corrosion can solve the existing aluminium alloy stress corrosion device structure complex, the problem that operation is troublesome, there can be stress control not accurate in the operation process, sample fixation unstable leads to the accuracy of test result is poor.

[0005] To achieve the above object, the utility model provides the following technical scheme: a device for aluminium alloy stress corrosion, including the workbench, the middle part of workbench is provided with the corrosion liquid containing cavity of inner recess, be provided with bolt fastening device for fixing sample in corrosion liquid containing cavity, the surface of sample can detachably be provided with sensor, bolt fastening device includes the bolt that passes through sample, the end of bolt is provided with nut, stress loading assembly is arranged on the left end upper side of workbench, be provided with a plurality of wires on stress loading assembly, stress loading assembly is connected with sensor and nut through wire respectively, display, the display is arranged on the right end upper side of workbench, the display is electrically connected with stress loading assembly through wire, through stress loading assembly can realize the effect of loading different stress to different sample, simulate a variety of aluminium alloy actual working environment, make the test result more close to the performance of material in practical application, improve the accuracy of test result.

[0006] As a preferred, the sample is provided with a thread matched with the bolt, and the cross section of the sample is in the shape of C, so as to fix the sample.

[0007] As a preferred, the top of the corrosion liquid containing cavity is provided with a flip cover for sealing the corrosion liquid containing cavity.

[0008] As preferred, the upper side of the workbench is vertically provided with a grid at the rear of the etching liquid containing cavity for placing the sample.

[0009] As preferred, the rear side of the grid is provided with at least one heating pipe for drying the sample.

[0010] As preferred, the front of the grid is detachably provided with a plurality of round pipes for placing other auxiliary tools.

[0011] As preferred, the upper end of the workbench is peripherally provided with a guardrail, and the top of the guardrail is provided with an illuminating device, the guardrail improves the operation safety, and the illuminating device improves the visibility.

[0012] As preferred, the bottom of the workbench is provided with universal wheels at the four corners, facilitating the movement of the device.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The structure is simple, the operation is convenient, the stress corrosion test of the aluminum alloy sample can be effectively carried out, the stress loading assembly can load different stresses on the sample, the device can simulate a plurality of actual working environments, the test result is closer to the performance of the material in the actual application, the practicality and reference value of the test result are improved, the safety and reliability of the component in the expected use environment are helped to ensure, the failure risk caused by stress corrosion is reduced, the test precision and efficiency are improved, and the problems that the existing aluminum alloy stress corrosion device is complex in structure, is cumbersome to operate, the stress control is not accurate in the operation process, and the test result is poor in accuracy due to unstable sample fixation can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the utility model;

[0016] Figure 2 It is a front view of the utility model;

[0017] Figure 3 It is a structural schematic view of the workbench of the utility model;

[0018] Figure 4 It is a connection structure schematic view of the bolt fastening device in the test state of the utility model.

[0019] Reference signs:

[0020] 1, workbench, 2, stress loading assembly, 21, wire, 3, display, 4, etching liquid containing cavity, 5, flip cover, 6, sample, 7, bolt fastening device, 71, bolt, 72, nut, 8, sensor, 9, grid, 10, heating pipe, 11, guardrail, 12, illuminating device, 13, round pipe, 14, universal wheel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model.

[0022] As shown in the figure, Figures 1-4 The utility model discloses to solve the problems of complex structure, tedious operation, inaccurate stress control in the operation process and unstable sample fixation of the existing aluminum alloy stress corrosion device, and provides the technical scheme as follows: a device for aluminum alloy stress corrosion, which comprises a workbench 1, the middle part of the workbench 1 is provided with an inner concave corrosion liquid containing cavity 4, the corrosion liquid containing cavity 4 is provided with a bolt fastening device 7 for fixing a sample 6, the surface of the sample 6 is detachably provided with a sensor 8, the bolt fastening device 7 comprises a bolt 71 penetrating through the sample 6, and the end of the bolt 71 is provided with a nut 72, a stress loading assembly 2 is arranged on the left upper side of the workbench 1, the stress loading assembly 2 comprises a data acquisition module and a stress output and stress adjustment module, can provide stress and collect data simultaneously, a plurality of wires 21 are arranged on the stress loading assembly 2, the stress loading assembly 2 is connected with the sensor 8 and the nut 72 through the wires 21 respectively, and a display 3 is arranged on the right upper side of the workbench 1.

[0023] In the embodiment, as shown in the figure, Figure 4 The sample 6 is provided with threads matched with the bolt 71, and the cross section of the sample 6 is in the shape of C, so that the sample is fixed.

[0024] In the embodiment, as shown in the figure, Figure 1 The top of the corrosion liquid containing cavity 4 is provided with a flip cover 5 for sealing the corrosion liquid containing cavity 4.

[0025] In the embodiment, as shown in the figure, Figure 2 The upper side of the workbench 1 is vertically provided with a grid 9 at the rear part of the corrosion liquid containing cavity 4 for placing the sample.

[0026] In the embodiment, as shown in the figure, Figure 2 The rear side of the grid 9 is provided with at least one heating pipe 10 for drying the sample.

[0027] In the embodiment, as shown in the figure, Figure 2As shown, the front of the grid 9 is detachably provided with a plurality of round tubes 13 for placing other auxiliary tools.

[0028] In this embodiment, as shown in the drawings, Figure 2 As shown, the upper end of the workbench 1 is provided with a guardrail 11, and the top of the guardrail 11 is provided with an illuminating device 12.

[0029] In this embodiment, as shown in the drawings, Figure 2 As shown, the bottom corners of the workbench 1 are provided with universal wheels 14, facilitating the movement of the device.

[0030] In this embodiment, as shown in the drawings, Figures 1-4 As shown, during the experiment, according to the different copper contents of the test sample 6, appropriate corrosion liquid is selected, the corrosion liquid is placed in the corrosion liquid containing cavity 4, the bolt 71 is passed through the test sample 6, the nut 72 is fixed at the end of the bolt 71, the stress loading assembly 2 is connected with the nut 72, the sensor 8 and the display 3 through the lead wire 21, the bolt fastening device 7 with the fixed test sample 6 is fully immersed or semi-immersed in the corrosion liquid containing cavity 4 containing the corrosion liquid, the cover 5 is covered, the start button is pressed, and the test is performed. In the test, cracking confirmation needs to be performed twice a week, with an interval of one day each time; if cracking occurs, the time of cracking is recorded, the test sample 6 is taken out of the bolt fastening device 7, is fully washed and dried, a clear photo of the cracking position is taken, and the cracked test sample 6 is hung on the grid 9. When different test samples are tested, different stresses can be loaded on different test samples 6 through the stress adjusting module 2. Under the action of stress and corrosion liquid, the oxide film on the surface of the test sample 6 is destroyed, the damaged surface and the undamaged surface form anode and cathode respectively, the metal of the anode becomes ion and dissolves, leading to current flowing to the cathode. Since the area of the anode is much smaller than that of the cathode, the current density of the anode is very high, further corroding the damaged surface. In addition to the action of stress, the damaged surface gradually forms a crack, and the crack gradually expands with time until the crack is broken. When it is necessary to test test samples with different copper contents, the nut 72 is rotated out, the test sample 6 is replaced, and the nut 72 is rotated again. The stress loading assembly 2 loads appropriate stress on the test sample 6.

[0031] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0032] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

Claims

1. An apparatus for stress corrosion of aluminum alloys, characterized in that, Include: Workbench (1), the middle part of the workbench (1) is provided with an inner recessed corrosion liquid containing cavity (4), the corrosion liquid containing cavity (4) is provided with bolt fastening device (7) for fixing sample (6), the surface of the sample (6) is detachably provided with sensor (8); The bolt fastening device (7) includes a bolt (71) passing through the sample (6), and the end of the bolt (71) is provided with a nut (72); Stress loading assembly (2) is arranged on the left end of the upper side of the workbench (1), a plurality of wires (21) are arranged on the stress loading assembly (2), and the stress loading assembly (2) is connected with the sensor (8) and the nut (72) respectively through the wires (21); Display (3), the display (3) is arranged on the right end of the upper side of the workbench (1), and the display (3) is electrically connected with the stress loading assembly (2) through the wires (21).

2. The apparatus for aluminum alloy stress corrosion according to claim 1, characterized by: The sample (6) is provided with a thread matched with the bolt (71), and the cross section of the sample (6) is C-shaped.

3. The apparatus for aluminum alloy stress corrosion according to claim 1, characterized by: The top of the corrosion liquid containing cavity (4) is provided with a flip cover (5).

4. The apparatus for aluminum alloy stress corrosion according to claim 1, characterized by: The upper side of the workbench (1) is vertically provided with a grille (9) at the rear of the corrosion liquid containing cavity (4).

5. The apparatus for aluminum alloy stress corrosion according to claim 4, characterized in that: The rear side of the grille (9) is provided with at least one heating pipe (10).

6. The apparatus for aluminum alloy stress corrosion according to claim 4, characterized in that: The front of the grille (9) is detachably provided with a plurality of circular pipes (13).

7. The apparatus for aluminum alloy stress corrosion according to claim 1, characterized by: The upper end of the workbench (1) is provided with a guardrail (11), and the top of the guardrail (11) is provided with an illuminating device (12).

8. The apparatus for aluminum alloy stress corrosion according to claim 1, characterized in that: The bottom of the workbench (1) is provided with universal wheels (14) at the four corners.

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