A high-low temperature combined environment sensitive fracture test system

Abstract

The application provides a high-low temperature composite environment sensitive fracture test system, which comprises a fracture testing machine, a high-low temperature composite salt spray test box and a main control cabinet; the test cavity of the high-low temperature composite salt spray test box is arranged in the environment sensitive fracture testing machine; a test piece is in the test cavity of the high-low temperature composite salt spray test box, a high-low temperature alternating corrosion environment is realized through a wet heat module, a low temperature module and a spraying device; a salt spray, a wet heat, a drying and a low temperature test section are set through a control system, the time and the cycle number of each test section are adjusted, a high-low temperature composite salt spray environment is formed, and the environment sensitive fracture test under a multi-factor coupling environment can be realized in cooperation with the environment sensitive fracture testing machine. The application has a flexible structure, a large adjustable range, high test efficiency, saves test space, can simulate the real service environment according to the service environment of the material test piece under different working conditions, adjust the environment test parameters, simulate the real service environment, and multi-levelly examine the environment sensitive fracture performance of the material.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of fracture test, in particular to a high-low temperature composite environment sensitive fracture test system. BACKGROUND

[0002] The actual service environment of materials is often the combined action of multiple corrosion factors, and the complex marine corrosion environment in the tropics, the low temperature in the polar region and the special seasonal temperature difference make the equipment materials face severe challenges during service. In the marine environment, salt spray and alternating wet and hot effects can form a complex corrosion system on the surface of the material; while in the polar region, low temperature changes the plasticity and toughness of the material, and at the same time, the generation and diffusion of corrosion products in low temperature environment are inhibited, which may lead to the aggravation of local corrosion and affect the stress corrosion behavior of the material. In order to comprehensively evaluate the environmental sensitive fracture performance of the material, the material needs to be tested in a multi-factor coupled environment, and the high-low temperature composite corrosion environment can more truly simulate the temperature fluctuation and corrosion atmosphere in the service environment of the material; the alternating action of wet and hot and dry can accelerate the formation and peeling process of corrosion products; and the introduction of an electrochemical test module can real-time monitor the electrochemical properties of stress corrosion behavior. Integrating these functions into a system can more efficiently evaluate the service performance of the material under actual working conditions.

[0003] Therefore, the development of a test system that can simulate harsh marine environments, combine high-low temperature alternating corrosion and stress loading functions, can provide key data support for the research of equipment materials in different service environments, and accurately evaluate the environmental sensitive fracture performance of the material in a multi-factor corrosion environment. SUMMARY

[0004] To solve the problems of the prior art, the present application provides a high-low temperature composite environment sensitive fracture test system, which can realize the fracture test of the test piece in a complex environment and provide data support for the research and development of equipment materials in different marine environments.

[0005] To achieve the above-mentioned purpose, the present application realizes the following technical solutions:

[0006] A high-low temperature composite environment sensitive fracture test system, comprising a fracture testing machine, a high-low temperature composite salt spray test box and a host control cabinet, the fracture testing machine is connected with the host control cabinet through a circuit, the fracture testing machine comprises a host frame, a tensile power unit and a tensile generating unit, the tensile power unit and the tensile generating unit are arranged on the host frame in an up-down position relationship; the high-low temperature composite salt spray test box is provided with a test cavity on the front side, the test cavity is provided with a test cavity door on the front side, and the test cavity is provided with a sealing port on the top; the fracture testing machine is matched with the test cavity, when the fracture test is carried out, the tensile generating unit is located in the test cavity, the tensile power unit passes through the sealing port and is exposed outside the high-low temperature composite salt spray test box, and the bottom of the tensile power unit of the fracture testing machine is sealingly connected with the sealing port.

[0007] Preferably, the high-low temperature composite salt spray test box is provided with a spraying device, a wet heat module, a low temperature module and a corrosion solution module, the spraying device is located in the test cavity, and the main cavity of the high-low temperature composite salt spray test box is connected with the test cavity through a test air inlet; an air blower is arranged on the top of the high-low temperature composite salt spray test box, and a high-pressure air inlet valve is arranged on one side of the high-low temperature composite salt spray test box.

[0008] Preferably, the high-low temperature composite salt spray test box is provided with a telescopic mechanism at the bottom, and the telescopic mechanism is used for lifting the high-low temperature composite salt spray test box as a whole.

[0009] Preferably, the telescopic mechanism is provided with a plurality of universal wheels at the bottom.

[0010] Preferably, the tensile power unit comprises a servo motor, an upper rack plate and two pairs of fixed rack plates, the servo motor is arranged on the top of the host frame, the two pairs of fixed rack plates are arranged on the two sides of the host frame in an up-down position relationship, the upper rack plate is located above the upper fixed rack plate, a lifting assembly is arranged between the servo motor and the upper rack plate, an upper pull rod, a connecting frame and a lower pull rod are sequentially arranged on the bottom of the upper rack plate from top to bottom, a test cavity cover is arranged on the bottom of the lower pull rod, the lower pull rod passes through the center of the test cavity cover, and a deformation sensor and a force sensor are arranged between the lower pull rod and the test cavity cover.

[0011] Preferably, a guide shaft is vertically arranged on the top of the upper rack plate, an installation platform is fixedly arranged on the bottom of the guide shaft, a guide platform is arranged on the bottom of the servo motor, the guide platform is provided with a guide hole which is in sliding fit with the guide shaft, a drive lead screw is coaxially arranged on the motor shaft of the servo motor, and a lead screw nut which is matched with the drive lead screw is arranged on the installation platform.

[0012] Preferably, the stretching unit comprises a counterforce frame arranged below the test cavity cover, and a pair of sample clamps arranged between the counterforce frame and the test cavity cover, and connected to the bottom of the counterforce frame and the bottom of the lower pull rod respectively.

[0013] Preferably, the test cavity cover is provided with a reference electrode hole, an electrochemical hole and a water inlet hole.

[0014] Preferably, a detachable sealing block is arranged at the sealing port, and the test cavity cover and the sealing port are sealingly connected through the detachable sealing block when the fracture test is performed.

[0015] Preferably, the method for fracture test comprises the following steps:

[0016] S1, start the main control cabinet and the high-low temperature combined salt spray test box;

[0017] S2, add corrosion solution to the corrosion solution module;

[0018] S3, push the high-low temperature combined salt spray test box into the fracture testing machine, adjust the position so that the test piece is located at the center of the test cavity, and sealingly connect the test cavity and the test cavity cover through the sealing ring;

[0019] S4, adjust the pressure in the high-low temperature combined salt spray test box to be between 0.2-0.4 MPa, load the test piece using the clamp, and close the test cavity door;

[0020] S5, set the salt spray section, the humid heat section, the low temperature section and the drying section in the high-low temperature combined salt spray test box, adjust the time and the cycle number of each section, and start the high-low temperature combined salt spray test box;

[0021] S6, set the mechanical test and various parameters through the main control cabinet, and start the fracture testing machine;

[0022] S7, the test piece is fractured, the test program is closed, the test data is recorded, the test piece is taken out, and the test is ended.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] The high-low temperature composite environment sensitive fracture test system and test method provided by the application can accurately simulate complex service environments, such as polar environment, plateau environment and tropical marine environment, especially under the conditions of dry-wet alternation and salt spray corrosion, and can simulate various service environments. The system integrates high-low temperature alternating corrosion environment control, mechanical loading and electrochemical test functions, realizes the environment sensitive fracture test under the coupling action of multiple factors, and provides technical support for in-depth revealing of the environment sensitive fracture mechanism of materials under different service environments. The application has high test efficiency and small test space, and can provide key data support for the research of equipment materials under different service environments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the application;

[0026] Figure 2 It is a schematic diagram of the perspective view structure of the environment sensitive fracture testing machine;

[0027] Figure 3 It is a schematic diagram of the front view structure of the environment sensitive fracture testing machine;

[0028] Figure 4 It is a schematic diagram of the tensile generation unit structure of the environment sensitive fracture testing machine;

[0029] Figure 5 It is a schematic diagram of the high-low temperature composite salt spray test box in a perspective state;

[0030] Reference signs shown in the drawings: 1, fracture testing machine; 11, tensile power unit; 12, tensile generation unit; 101, servo motor; 102, main machine frame; 103, upper rack plate; 104, fixed rack plate; 105, upper pull rod; 106, connecting frame; 107, lower pull rod; 108, deformation sensor; 109, force sensor; 110, test cavity cover; 111, test sample clamp; 113, test piece; 114, counterforce frame; 115, main machine bottom plate; 116, reference electrode hole; 117, electrochemical hole; 118, water inlet hole; 119, guide shaft; 120, mounting platform; 121, guide platform; 122, drive lead screw; 123, lead screw nut; 2, high-low temperature composite salt spray test box; 201, test cavity door; 202, test cavity; 203, spray device; 204, controller; 205, wet heat module; 206, air blower; 207, test air inlet; 208, feed inlet; 209, low temperature module; 210, corrosion solution module; 211, high pressure air inlet valve; 212, telescopic mechanism; 213, universal wheel; 214, box body; 215, temperature and humidity sensor; 216, detachable sealing block; 217, sealing port; 3, main machine control cabinet. DETAILED DESCRIPTION

[0031] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0032] like Figures 1-5 As shown, the high and low temperature composite environment sensitive fracture test system of the present invention includes a fracture testing machine 1, a high and low temperature composite salt spray test chamber 2, and a main control cabinet 3. The fracture testing machine 1 is connected to the main control cabinet 3 through a line. The main control cabinet 3 is used to control the operation of the fracture testing machine 1 and to set the mechanical test and various parameters of the fracture testing machine 1 through the main control cabinet 3.

[0033] The fracture testing machine 1 has a main frame 102 as the mounting element for various components, on which two main parts are mounted to perform fracture tests on the specimens: a tensile power unit 11 and a tensile generating unit 12. The tensile power unit 11 and the tensile generating unit 12 are arranged vertically on the main frame 102.

[0034] Tensioning power unit 11:

[0035] The tensioning power unit 11 includes a servo motor 101, an upper frame plate 103, and two pairs of fixed frame plates 104. The servo motor 101 is mounted on the top of the main frame 102, and the two pairs of fixed frame plates 104 are positioned vertically on both sides of the main frame 102. The fixed frame plates 104 are fastened to both sides of the main frame 102 with bolts. A connecting column is installed between two fixed frame plates 104 on the same side to connect and fix the two fixed frame plates 104, ensuring the positional relationship between the two fixed frame plates 104. The upper frame plate 103 is located above the upper fixed frame plate 104, and the upper fixed frame plate 104 is used to position the lowest position of the upper frame plate 103.

[0036] A lifting assembly is arranged between the servo motor 101 and the upper shelf plate 103, and the rotation power of the servo motor 101 is converted into the lifting power of the upper shelf plate 103 through the transmission of the lifting assembly. Specifically, the lifting assembly includes a plurality of guide shafts 119 arranged vertically on the top of the upper shelf plate 103. In this embodiment, the guide shafts 119 have two. The bottom of the guide shaft 119 is fixedly provided with a mounting platform 120. The bottom of the servo motor 101 has a guide platform 121, and the guide platform 121 has a guide hole that is in sliding fit with the guide shaft 119. A drive lead screw 122 is coaxially installed on the motor shaft of the servo motor 101. A lead screw nut 123 that is matched with the drive lead screw 122 is fixedly installed on the mounting platform 120. When the servo motor 101 drives the drive lead screw 122 to rotate, the drive lead screw 122 and the lead screw nut 123 are matched to drive the upper shelf plate 103 to rise or fall as a whole. The guide shaft 119 is matched with the guide hole to limit and guide the rising and falling movement of the upper shelf plate 103.

[0037] The upper shelf plate 103 is sequentially provided with an upper pull rod 105, a connecting frame 106 and a lower pull rod 107 from top to bottom at the bottom of the upper shelf plate 103. The test cavity cover 110 is arranged at the bottom of the lower pull rod 107. The test cavity cover 110 is used as a sealing part matched with the high-low temperature combined salt spray test chamber 2, and is also used as a partition between the stretching power unit 11 and the stretching generating unit 12. The lower pull rod 107 passes through the center of the test cavity cover 110 and is exposed below the test cavity cover 110, and is used as a connecting piece of the upper sample clamp 111 in the lower stretching generating unit 12. The test cavity cover 110 is located below the lower fixed shelf plate 104.

[0038] The deformation sensor 108 and the force sensor 109 are arranged between the lower pull rod 107 and the test cavity cover 110. The deformation sensor 108 and the force sensor 109 are used to detect tension data and feed back the data to the host control cabinet 3. The power output of the servo motor 101 is accurately controlled by the host control cabinet 3 to adjust the tension and speed parameters of the stretching.

[0039] Stretching generating unit 12:

[0040] The stretching generating unit 12 includes a counterforce frame 114 installed below the test cavity cover 110. A pair of sample clamps 111 are arranged between the counterforce frame 114 and the test cavity cover 110, and the sample clamps 111 are respectively connected with the bottom of the counterforce frame 114 and the bottom of the lower pull rod 107. The sample clamp 111 is used as a clamping part of the test piece 113, and can be replaced according to different test pieces 113. The sample clamp 111 is mainly divided into a plate clamp and a bar clamp.

[0041] When the tensile test is performed, the lower pull rod 107 pulls the upper sample clamp 111, and the test chamber cover 110 is clamped on the lower fixed frame plate 104, so as to realize the tensile test of the sample clamp 111 on the test piece 113.

[0042] Preferably, the test chamber cover 110 is provided with a reference electrode hole 116, an electrochemical hole 117 and a water inlet hole 118. The glass kettle can be installed below the test chamber cover 110, and the corrosion solution can be added through the reserved water inlet hole 118, and the electrochemical test can be performed through the reference electrode hole 116 and the electrochemical hole 117.

[0043] The high-low temperature combined salt spray test chamber 2 is used to create the experimental environment, and the high-low temperature combined salt spray test chamber 2 is provided with a spraying device 203, a wet heat module 205, a low temperature module 209 and a corrosion solution module 210. The wet heat module 205 is used for electric heating and humidification of the high-low temperature combined salt spray test chamber 2 to create a hot and humid environment. The low temperature module 209 uses a compressor to create a low temperature environment. The corrosion solution module 210 contains the prepared corrosion solution. Specifically, a feed inlet 208 is provided at the top of the high-low temperature combined salt spray test chamber 2 as a filling port for the corrosion solution. The corrosion solution module 210 is connected to the spraying device 203 through a pipeline, and the corrosion solution is atomized and sprayed out through the spraying device 203 to create a corrosive environment.

[0044] The high-low temperature combined salt spray test chamber 2 is provided with a blower 206 at the top, which pushes the air flow to make the salt mist and air in the chamber evenly distributed. It brings the salt mist generated by the spraying system to every corner of the test chamber, ensuring that the environmental parameters such as salt mist concentration, temperature and humidity at different positions in the chamber remain consistent, so that the test samples can be evenly eroded by the salt mist, improving the accuracy and reliability of the test results.

[0045] During the drying stage, the blower sends the air heated by the air heater into the chamber, quickly reducing the humidity in the chamber to form a low-humidity environment. This is crucial for simulating the dry stage in natural environment or the dry stage in cyclic salt spray test, and can more realistically simulate the alternating dry and wet changes in actual use environment.

[0046] The high-low temperature combined salt spray test chamber 2 is provided with a high-pressure air inlet valve 211 on one side. The high-pressure air inlet valve 211 is connected to a pressure source to adjust the pressure in the high-low temperature combined salt spray test chamber 2 by introducing compressed air.

[0047] The front side of the high-low temperature combined salt spray test chamber 2 is provided with a test cavity 202, and the spray device 203 is installed in the test cavity 202. The main cavity of the high-low temperature combined salt spray test chamber 2 is connected with the test cavity 202 through a test air inlet 207. The test cavity 202 is provided with a test cavity door 201 at the front side, and the test cavity 202 is provided with a sealing port 217 at the top. When the fracture test is performed, the tensile generating unit 12 is located in the test cavity 202, the tensile power unit 11 is exposed outside the high-low temperature combined salt spray test chamber 2 through the sealing port 217, and the test cavity cover 110 is sealingly connected with the sealing port 217. A detachable sealing block 216 is arranged at the sealing port 217. When the fracture test is performed, the test cavity cover 110 is sealingly connected with the sealing port 217 through the detachable sealing block 216.

[0048] Specifically, the high-low temperature combined salt spray test chamber 2 is provided with a telescopic mechanism 212 at the bottom, and the telescopic mechanism 212 is used to lift the high-low temperature combined salt spray test chamber 2 as a whole. In the embodiment, the telescopic mechanism 212 is four extension hydraulic cylinders or air cylinders arranged at four corners of the bottom of the high-low temperature combined salt spray test chamber 2. Through the lifting action of the telescopic mechanism 212, the test cavity cover 110 can be abutted at the sealing port 217, and stable sealing can be achieved through the detachable sealing block 216.

[0049] More specifically, the telescopic mechanism 212 is provided with a plurality of universal wheels 213 at the bottom, and the universal wheels 213 make the movement of the high-low temperature combined salt spray test chamber 2 more arbitrary, so that the tensile generating unit 12 of the fracture testing machine 1 can be more conveniently placed in the test cavity 202.

[0050] The device is used for performing fracture test on metal test pieces, and the test method mainly includes the following steps:

[0051] S1, check whether the equipment circuit setting is safe, start the main machine control cabinet 3 and the high-low temperature combined salt spray test chamber 2.

[0052] S2, add corrosion solution to the corrosion solution module 210 through the feeding port 208.

[0053] S3, push the high-low temperature combined salt spray test chamber 2 into the fracture testing machine 1, adjust the position, make the test piece located at the center of the test cavity 202, and make the test cavity 202 and the test cavity cover 110 sealingly connected through the sealing ring.

[0054] S4, open the high-pressure air inlet valve 211, adjust the pressure in the high-low temperature combined salt spray test chamber 2 to be between 0.2-0.4 MPa, lift the high-low temperature combined salt spray test chamber 2 through the controller 204, make the test cavity 202 and the test cavity cover 110 sealingly connected through the sealing ring, load the test piece by using the clamp, and close the test cavity door 201.

[0055] S5, set the salt spray section, the wet heat section, the low temperature section and the drying section in the high-low temperature combined salt spray test chamber 2 by the controller 204, adjust the time and cycle times of each section, and start the high-low temperature combined salt spray test chamber 2.

[0056] S6, set the mechanical test and various parameters by the host control cabinet 3, and start the fracture testing machine 1.

[0057] S7, the test piece 113 is fractured, the test program is closed by the controller 204, the test data is recorded, the test piece is taken out, and the test is ended.

[0058] In summary, the system should have the following functions:

[0059] 1. It can simulate high-low temperature combined corrosion environment, and can freely adjust temperature, humidity and corrosion medium type;

[0060] 2. Combined with the environmental sensitive fracture testing machine, it can load static or dynamic mechanical stress to explore the initiation and expansion mechanism of stress corrosion cracks;

[0061] 3. It has the ability to adjust multiple environmental factors, such as salt spray spraying, dry-wet alternating and low temperature freezing;

[0062] 4. It is equipped with electrochemical test function to monitor the dynamic characteristics of stress corrosion behavior in real time;

[0063] 5. The structure is compact, the operation is flexible, the test efficiency is high, and it can adapt to the test needs of various materials and test pieces.

Claims

1. A high-low temperature combined environment sensitive fracture test system, comprising a fracture testing machine (1), a high-low temperature combined salt spray test chamber (2) and a main control cabinet (3), characterized in that: The breaking testing machine (1) is connected with the main control cabinet (3) through a line, the breaking testing machine (1) comprises a main frame (102), a tensile power unit (11) and a tensile generating unit (12), the tensile power unit (11) and the tensile generating unit (12) are arranged on the main frame (102) in an up-down position relationship; the high-low temperature composite salt spray test chamber (2) is provided with a test cavity (202) at the front side, the test cavity (202) is provided with a test cavity door (201) at the front side, and the test cavity (202) is provided with a sealing opening (217) at the top; the breaking testing machine (1) is adapted to the test cavity (202), when the breaking test is carried out, the tensile generating unit (12) is located in the test cavity (202), the tensile power unit (11) is exposed outside the high-low temperature composite salt spray test chamber (2) through the sealing opening (217), and the tensile power unit (11) of the breaking testing machine (1) is sealingly connected with the sealing opening (217); the high-low temperature composite salt spray test chamber (2) is provided with a spraying device (203), a wet heat module (205), a low temperature module (209) and a corrosion solution module (210), the spraying device (203) is located in the test cavity (202), the wet heat module (205), the low temperature module (209) and the corrosion solution module (210) are arranged in a main chamber, and the main chamber of the high-low temperature composite salt spray test chamber (2) is connected with the test cavity (202) through a test air inlet (207); the high-low temperature composite salt spray test chamber (2) is provided with a blower (206) at the top, and the high-low temperature composite salt spray test chamber (2) is provided with a high-pressure air inlet valve (211) at one side.

2. The high-low temperature combined environmental sensitive fracture test system of claim 1, wherein: The high-low temperature composite salt spray test chamber (2) is provided with a telescopic mechanism (212) at the bottom, and the telescopic mechanism (212) is used for lifting the high-low temperature composite salt spray test chamber (2) as a whole.

3. The high-low temperature combined environmental sensitive fracture test system of claim 2, wherein: A plurality of universal wheels (213) are arranged at the bottom of the telescopic mechanism (212).

4. The high-low temperature combined environmental sensitive fracture test system of claim 1, wherein: The tensile power unit (11) comprises a servo motor (101), an upper shelf plate (103) and two pairs of fixed shelf plates (104), the servo motor (101) is arranged at the top of the main frame (102), the two pairs of fixed shelf plates (104) are arranged on the main frame (102) in an up-down position relationship, the upper shelf plate (103) is located above the upper fixed shelf plate (104), a lifting assembly is arranged between the servo motor (101) and the upper shelf plate (103), the upper shelf plate (103) is sequentially provided with an upper pull rod (105), a connecting frame (106) and a lower pull rod (107) from top to bottom at the bottom, a test cavity cover (110) is arranged at the bottom of the lower pull rod (107), the lower pull rod (107) penetrates the center of the test cavity cover (110), and a deformation sensor (108) and a force sensor (109) are arranged between the lower pull rod (107) and the test cavity cover (110).

5. The high-low temperature combined environmental sensitive fracture test system of claim 4, wherein: The upper shelf plate (103) is vertically provided with a guide shaft (119) at the top, the bottom of the guide shaft (119) is fixedly provided with a mounting platform (120), the bottom of the servo motor (101) is provided with a guide platform (121), the guide platform (121) has a guide hole which is in sliding fit with the guide shaft (119), and a drive lead screw (122) is coaxially mounted on the motor shaft of the servo motor (101), and the mounting platform (120) is provided with a lead screw nut (123) which is matched with the drive lead screw (122).

6. The high-low temperature combined environmental sensitive fracture test system of claim 4, wherein: The tensile force generating unit (12) comprises a counterforce frame (114) arranged below the test cavity cover (110), and a pair of sample clamps (111) are arranged between the counterforce frame (114) and the test cavity cover (110).

7. The high-low temperature combined environmental sensitive fracture test system of claim 4, wherein: The test cavity cover (110) is provided with a reference electrode hole (116), an electrochemical hole (117) and a water inlet hole (118).

8. The high-low temperature combined environmental sensitive fracture test system of claim 4, wherein: The sealing port (217) is provided with a detachable sealing block (216), and when the fracture test is performed, the test cavity cover (110) and the sealing port (217) are sealingly connected through the detachable sealing block (216).

9. The high-low temperature combined environmental sensitive fracture testing system of claim 4, wherein, The method for the fracture test comprises the following steps: S1, start the main control cabinet (3) and the high-low temperature composite salt spray test box (2); S2, add corrosion solution to the corrosion solution module (210); S3, push the high-low temperature composite salt spray test box (2) into the fracture testing machine (1), adjust the position, so that the test piece is located at the center of the test cavity (202), and the test cavity (202) and the test cavity cover (110) are sealingly connected through the sealing ring; S4, adjust the pressure in the high-low temperature composite salt spray test box (2) to be between 0.2-0.4 MPa, load the test piece using the clamp, and close the test cavity door (201); S5, set the salt spray section, the humid heat section, the low temperature section and the drying section in the high-low temperature composite salt spray test box (2), adjust the time and the cycle number of each section, and start the high-low temperature composite salt spray test box (2); S6, set the mechanical test and various parameters through the main control cabinet (3), and start the fracture testing machine (1); S7, the test piece (113) is fractured, the test program is closed, the test data is recorded, the test piece is taken out, and the test is ended.

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