An experimental device and method for friction and wear tests in a corrosive simulation medium environment

Abstract

The present invention relates to a friction and wear test device and test method for a corrosion simulation medium environment. The device includes a display control module, a corrosion medium supply module, a friction and wear module, a loading module, a sealing device, and a liquid sealing device. First, the workpiece to be worn is clamped to the friction and wear module after undergoing pretreatment processes such as degreasing and cleaning; the corrosion medium supply module is filled with the prepared solution; the display control module is started to control the coordinated operation of the corrosion medium supply module and the friction and wear module according to the technological processes of controlling the environment and friction and wear, and complex corrosion-friction and wear coupling tests can be realized by modifying parameters according to requirements. The present invention is particularly suitable for the detection and comparison of the friction, wear, and corrosion performance of structural steel with a complex use environment, and has the advantages of excellent test environment control, stable load, and convenient operation.

Description

Technical Field

[0001] The present invention belongs to the field of wear and corrosion performance detection equipment, and particularly relates to a friction and wear test device and test method in a corrosion simulation medium environment. Background Art

[0002] The problems of marine atmospheric corrosion and wear severely limit the development of related industries. In such a severe service environment, the main factor threatening the service life of equipment is the corrosion and wear problem. According to the research results, the corrosion and wear cost of the national ocean accounts for more than 1.12% of the national GDP, and the losses caused are far greater than natural disasters. The marine atmospheric environment is a complex corrosion environment. Marine corrosion behavior is generally caused by multiple factors, and the influence of wear poses a severe test for its anti-corrosion.

[0003] Currently, the investigation of the wear resistance of materials mainly relies on friction and wear test equipment, also known as friction testing machines and wear testing machines. According to the friction movement mode, it can be divided into: linear reciprocating friction and wear testing machines, rotary friction and wear testing machines, and linear-rotary combined friction and wear testing machines. During the experiment, the specimen and the friction pair rub against each other at a specified speed under the action of the load friction body. The wear resistance of the material (or coating) is judged by measuring the reduction in volume or weight before and after friction. In terms of investigating the corrosion resistance of materials, the salt spray test chamber is the preferred experimental instrument. The instrument assesses the ability to resist salt spray corrosion and compares the corrosion resistance of the material and the protective coating through the corrosion situation of the material and its protective layer in the salt spray environment.

[0004] The prior art one adopts a test machine table horizontally arranged on a friction and wear testing machine. There is a guide rail base on the test machine table, a guide rail on the guide rail base, a sliding plate on the guide rail, and a specimen groove on the sliding plate; the specimen groove is divided into a liquid inlet groove and a specimen installation groove by a partition plate. There are communication holes on the partition plate, and drain holes are arranged at the positions of the communication holes in the specimen installation groove. The complex structural components are connected to each other, resulting in insufficient sealing of the device, poor control of temperature and humidity in the environment, and overflow of the salt spray atmosphere due to insufficient sealing; the prior art two adopts a bottom plate, a salt spray chamber, a vertical loading device, and a lateral moving device, but the loading force of the vertical loading device therein is very limited, and it cannot apply a large load to the workpiece. Moreover, due to the influence of the self-weight of the loading device, the loading force is not accurate and intuitive enough; the prior art three adopts a fatigue testing machine, a lateral force loading module, and an electrolytic accelerated corrosion module. The electrolytic accelerated corrosion module includes a DC regulated power supply, a positive wire and a negative wire are connected to the DC regulated power supply. The electrolytic accelerated corrosion module also includes a first liquid storage cylinder and a liquid collecting funnel. Both the first liquid storage cylinder and the liquid collecting funnel are filled with a corrosion medium. A first conduit is arranged below the first liquid storage cylinder. One end of the first conduit is communicated with the first liquid storage cylinder, and the other end is fixed along the test wire on the wire contact surface. The corrosion medium flows out from the first conduit and then flows downward along the test wire into the liquid collecting funnel.

[0005] Up to now, in the prior art, the integrated control of wear and corrosion cannot achieve good corrosion-wear coupling. It is necessary to separately control each module for control experiments, which is cumbersome in operation. In addition, there are many components in the existing equipment. After the components are connected, they need to be separately controlled, resulting in poor integration effect, complex design structure and inconvenient operation. Summary of the Invention

[0006] In order to overcome the above problems existing in the prior art, the present invention provides a friction and wear device and a use method in a corrosion simulation medium environment, which are used to solve the above problems existing in the prior art.

[0007] A friction and wear test device in a corrosion simulation medium environment includes: a display control and measurement heating module, a corrosion medium supply module, a friction and wear module, a loading assembly, a base and a sealing module.

[0008] Among them, the display control and measurement heating module is used to provide test parameters for the device, measure and heat the environment of the friction and wear module, and display relevant parameters during the operation of the device.

[0009] The corrosion medium supply module is used to provide a corrosion medium for the friction and wear module.

[0010] The friction and wear module includes a counter ball and a workpiece. The workpiece and the counter ball generate friction to cause wear, and a wear-corrosion test is carried out on the workpiece in the environment of the corrosion medium.

[0011] The loading assembly is used to provide a loading force for the friction and wear module.

[0012] The sealing module is used to seal the friction and wear module.

[0013] In the aspect and any possible implementation manner as described above, a further implementation manner is provided. The display control and measurement heating module includes a display controller, and a temperature sensor, a humidity sensor and a heating plate connected thereto.

[0014] In the aspect and any possible implementation manner as described above, a further implementation manner is provided. The friction and wear module further includes a limit pin, a motor, a lower grinding table and an upper grinding table. Among them, the lower surface of the motor is connected to the base, the upper part of the motor is connected to the lower grinding table, the limit pin, the workpiece and the counter ball are arranged between the upper grinding table and the lower grinding table, and the counter ball is arranged between the upper grinding table and the workpiece; the limit pin is arranged between the workpiece and the lower grinding table.

[0015] For the aspects and any possible implementation manners described above, a further implementation manner is provided. The sealing module includes an upper bolt, a sealing box body, an upper cover of the sealing box, and a bottom of the sealing box. Among them, the upper bolt connects the sealing box body and the upper cover of the sealing box; the temperature sensor and the humidity sensor are arranged on the inner surface of the upper cover of the sealing box, and the heating plate is arranged on the inner side surface of the sealing box body; the bottom of the sealing box is connected to the lower grinding table.

[0016] For the aspects and any possible implementation manners described above, a further implementation manner is provided. The corrosion medium providing module includes a salt spray generator, a salt spray rubber tube, and a salt spray nozzle. Among them, the salt spray nozzle is arranged on one side of the sealing box body opposite to the heating plate, the salt spray generator is arranged outside the sealing box body, and is connected to the salt spray nozzle through the salt spray rubber tube.

[0017] For the aspects and any possible implementation manners described above, a further implementation manner is provided. The loading assembly includes a loading module. The loading module includes: a loading bin, a weight tray, weights, and a loading lever. The loading bin is arranged on the base. One end of the loading lever is installed in the loading bin. The middle part of the loading lever is connected to the upper grinding table. The other end of the loading lever is connected to the weight tray, and the weights are arranged in the weight tray.

[0018] For the aspects and any possible implementation manners described above, a further implementation manner is provided. The loading assembly further includes a self-weight elimination module. The self-weight elimination module includes: a self-weight elimination lever, a self-weight elimination weight, and a self-weight elimination fixing rod. Among them, one end of the self-weight elimination lever is connected to the upper grinding table. The middle part of the self-weight elimination lever is connected to the self-weight elimination fixing rod. The self-weight elimination fixing rod is connected to the loading bin. The other end of the self-weight elimination lever is provided with a self-weight elimination weight.

[0019] For the aspects and any possible implementation manners described above, a further implementation manner is provided. The material of the counter grinding ball is any one of alumina, silicon carbide, and silicon nitride, and the radius is 1 mm to 7.5 mm.

[0020] The present invention also provides a test method for a corrosion simulation medium environment friction and wear test device. The test method is implemented by using the corrosion simulation medium environment friction and wear test device of the present invention, and includes the following steps: (1) The corrosion medium providing module configures a corrosion solution;

[0021] (2) Install the counter grinding ball and the workpiece between the upper grinding table and the lower grinding table, fix the workpiece to the lower grinding table through a limit pin, then load weights in the weight tray, and perform sealing after the loading is completed;

[0022] (3) Input test parameters through the display controller and start the device;

[0023] (4) The heating plate heats up, and the salt spray nozzle of the corrosion medium supply module supplies the corrosion solution to the friction and wear module. After the test parameters input in step (3) are reached in the sealed box, the motor starts to run at the set speed, driving the workpiece to move and generate friction with the counter-grinding ball;

[0024] (5) After reaching the set test time, turn off the device and take out the workpiece.

[0025] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, which further includes step (6) testing the taken-out workpiece to obtain the wear rate of the workpiece under the corrosion condition.

[0026] Advantages of the present invention

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The loading component of the present invention adopts a self-weight elimination module and a loading module. The self-weight elimination module ensures the loading accuracy. By changing the position and mass of the self-weight elimination weights, the self-weight elimination weights of the self-weight elimination module can eliminate the influence of the self-weights of the upper grinding table, the self-weight elimination lever, the loading lever, and the weight tray on the test force. The loading module adopts a labor-saving lever, which can use small-mass weights to achieve a large loading force, and can simulate the service conditions of large / heavy loads while facilitating the operation of the experimenter, and can achieve accurate control and intuitive query of the wear loading force;

[0029] (2) Designed by using a simple lever principle, the structure is simple. Temperature sensors, humidity sensors, salt spray generators, heating plates and other components are set and integratedly controlled to the display controller, and the operation is simple and fast;

[0030] (3) The present invention uses a liquid seal groove for liquid seal to ensure the sealing performance of the whole device. When the lower bottom of the sealed box and the lower grinding table are connected by a shaft seal, the lower bottom of the sealed box is relatively stationary, which can play a good sealing role. When the lower bottom of the sealed box and the lower grinding table are connected by bolts of the sealed box, even if the lower bottom of the sealed box rotates, the opening width of the liquid seal groove is smaller than the bottom width, and the sealing performance of the whole liquid seal device can be ensured during the rotation process. Generally speaking, the liquid seal groove has a simple structure and good sealing performance, providing support for creating the required test environment;

[0031] (4) The present invention uses rubber rings with unequal upper and lower surface widths to achieve the seal between the upper cover of the sealed box and the upper grinding table. The structure is simple. After closing the upper cover of the sealed box, the rubber ring can be directly clamped, and the operation is simple and the sealing performance is good. Description of the drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of the device according to an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the upper cover of the sealed box according to the present invention;

[0034] Figure 3 It is a schematic diagram of the connection between the lower grinding table and the shaft seal at the bottom of the sealed box according to the present invention.

[0035] The marks in the figure are as follows: 1 - display controller, 2 - upper bolt, 3 - temperature sensor, 4 - humidity sensor, 5 - salt spray generator, 6 - salt spray rubber tube, 7 - salt spray nozzle, 8 - waste liquid hole, 9 - base, 10 - bottom of the sealed box, 11 - liquid seal groove, 12 - sealed box body, 13 - limit pin, 14 - motor, 15 - workpiece, 16 - lower grinding table, 17-1 - lower bolt of the sealed box, 18 - grinding ball, 19 - heating plate, 20 - loading bin, 21 - loading bin door, 22 - weight tray, 23 - weight, 24 - loading lever, 25 - self-weight elimination lever, 26 - upper opening of the loading bin, 27 - self-weight elimination weight, 28 - self-weight elimination fixing rod, 29 - upper grinding table, 30 - rubber ring, 31 - upper cover of the sealed box,

[0036] 31-1 - fixing hole for the upper bolt of the sealed box cover, 31-2 - splicing part of the upper cover of the sealed box, 31-3 - opening on the upper grinding table,

[0037] 17-2 - shaft seal device, 17-2-1 - card slot at the bottom of the sealed box. Detailed implementation manners

[0038] For a better understanding of the technical solution of the present invention, the content of the present invention includes but is not limited to the following detailed implementation manners. Similar technologies and methods should be regarded as within the scope of protection of the present invention. To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0039] It should be clear that the embodiments described in the present invention are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts belong to the scope of protection of the present invention.

[0040] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0041] Such asFigure 1 As shown in the figure, a friction and wear device for a corrosion simulation medium environment according to the present invention includes: a display control and measurement heating module, a corrosion medium supply module, a friction and wear module, a loading assembly, a base 9, and a sealing module.

[0042] Among them, the display control and measurement heating module is used to provide test parameters for the device, measure and heat the environment of the friction and wear module, and display relevant parameters during the operation of the device.

[0043] The corrosion medium supply module is used to provide a corrosion medium for the friction and wear module.

[0044] The friction and wear module includes a counter ball and a workpiece. The workpiece and the counter ball generate friction and wear, and a wear-corrosion test is carried out on the workpiece in the environment of the corrosion medium.

[0045] The loading assembly is used to provide a loading force for the friction and wear module.

[0046] The sealing module is used to seal the friction and wear module. The display control and measurement heating module includes: a display controller 1, a temperature sensor 3, a humidity sensor 4, and a heating plate 19.

[0047] The corrosion medium supply module includes: a salt spray generator 5, a salt spray rubber tube 6, and a salt spray nozzle 7.

[0048] The friction and wear module includes: a limit pin 13, a motor 14, a workpiece 15, a lower grinding table 16, a counter ball 18, and an upper grinding table 29.

[0049] The loading assembly includes: a self-weight elimination module and a loading module.

[0050] The self-weight elimination module includes: a self-weight elimination lever 25, a self-weight elimination weight 27, and a self-weight elimination fixing rod 28.

[0051] The loading module includes: a loading bin 20, a loading bin door 21, a weight tray 22, weights 23, a loading lever 24, and an upper opening of the loading bin 26.

[0052] The sealing module includes: a sealing box upper bolt 2, a waste liquid hole 8, a sealing box body 12, a rubber ring 30, a sealing box upper cover 31, a sealing box lower bottom 10, and a lower bottom fixing device.

[0053] The liquid sealing module includes: a liquid sealing groove 11 and a sealing box lower bottom 10.

[0054] As Figure 2 shown, the sealing box upper cover 31 includes: a sealing box upper bolt fixing hole 31-1, a sealing box upper cover splicing part 31-2, and an upper grinding table opening 31-3.

[0055] The loading bin 20 is fixed on the base 9; the liquid seal groove 11 is fixed at the bottom of the sealed box body 12, and the liquid seal liquid is contained in the liquid seal groove 11. The lower end of the lower bottom 10 of the sealed box is inserted into the liquid seal liquid; the lower surface of the motor 14 is connected to the base 9, the upper part of the motor 14 is connected to the lower grinding table 16, the workpiece 15 is connected to the lower grinding table 16 through the limit pin 13, and the counter grinding ball 18 is placed between the workpiece 15 and the upper grinding table 29; the upper bolt 2 of the sealed box passes through the upper bolt fixing hole 31-1 of the sealed box to connect the sealed box body 12 and the upper cover 31 of the sealed box. The upper grinding table 29 passes through the upper grinding table opening 31-3, and the rubber ring 30 is placed in the gap between the upper grinding table 29 and the upper grinding table opening 31-3. The sealed part of the sealing device includes the lower half part 29 of the upper grinding table, the counter grinding ball 18, the workpiece 15, the limit pin 13, the upper half part of the lower grinding table 16, the temperature controller 3, the humidity controller 4, the heating plate 19, the salt spray nozzle 7, and the part of the salt spray rubber tube 6 connected to the salt spray nozzle 7; one end of the self-weight elimination lever 25 is connected to the upper grinding table 29 through a hinge, the middle part of the self-weight elimination lever 25 is hinged to the self-weight elimination fixing rod 28, the self-weight elimination fixing rod 28 is rigidly connected to the loading bin 20, and the other end of the self-weight elimination lever 25 is provided with a self-weight elimination weight 27. The function of the self-weight elimination module is to balance the structure of the entire loading component that affects the wear test force through a simple and easy-to-design lever structure, and can simulate the service conditions of small loads while facilitating the operation of the experimenter. The self-weight elimination lever 25 provides a lever for the self-weight elimination module, the self-weight elimination weight 27 eliminates the self-weight of the structure of the entire loading component that affects the wear test force, and the self-weight elimination fixing rod 28 provides a fulcrum for the self-weight elimination lever 25; one end of the loading lever 24 is installed on the loading bin 20 through a hinge, the middle part of the loading lever 24 is hinged to the upper grinding table 29, and the other end of the loading lever 24 is connected to the weight tray 22; the salt spray nozzle 7 is inside the sealed box body 12, and the salt spray generator 5 is outside the sealed box body 12 and is connected to the salt spray nozzle 7 through the salt spray rubber tube 6. The connection part of the salt spray rubber tube 6 and the sealed box body is rubber-sealed to ensure the sealing performance of the sealed box body; the temperature sensor 3, the humidity sensor 4, the salt spray generator 5, the motor 14, and the heating plate 19 are connected to the display controller 1 through external control lines.

[0056] The workpiece 15 is connected to the lower grinding table 16 through the limit pin 13, and the counter grinding ball 18 is placed between the workpiece 15 and the upper grinding table 29, which ensures the stability of the workpiece 15 during the wear process and prevents eccentric wear. The use of double balls for the counter grinding ball 18 greatly improves the wear efficiency; the addition of the self-weight elimination lever 25 balances the structure of the entire loading component that affects the wear test force through a lever structure, and can simulate the service conditions of small loads while facilitating the operation of the experimenter; the salt spray nozzle 7 is inside the sealed box body 12, and the salt spray generator 5 is outside the sealed box body 12 and is connected to the salt spray nozzle 7 through the salt spray rubber tube 6, which will not corrode the salt spray generator 5 during the salt spray simulation process. The salt spray nozzle 7 adopts a divergent structure, so that the salt spray can act evenly on the wear surface of the workpiece 15.

[0057] Preferably, the sealing box upper cover 31 can be opened at the sealing box upper cover joint 31-2, and an upper grinding table opening 31-3 is provided in the middle of the sealing box upper cover joint 31-2. The diameter of the upper grinding table opening 31-3 is 2~8mm larger than the diameter of the upper grinding table 29 in the same horizontal position, which can ensure that the upper grinding table 29 can move freely up and down relative to the sealing box upper cover 31 when the workpiece 15 is clamped. The temperature sensor 3 and the humidity sensor 4 are connected to the lower surface of the sealing box upper cover 31, which can better reflect the real-time temperature and humidity in the sealing box body 12 to the display controller 1, the heating plate 19 is connected to the inner side of the sealing box body 12, and the waste liquid hole 8 is located at the bottom of the sealing box body 12, which can ensure that the salt spray waste liquid is discharged in time when the device works continuously for a long time.

[0058] Preferably, the sealing box bottom fixing device is the sealing box bottom bolt 17-1, the sealing box bottom 10 is connected to the lower grinding table 16 through the sealing box bottom bolt 17-1, the upper surface of the upper part of the lower grinding table 16 is connected to the workpiece 15 and the limit pin 13, the middle part of the lower grinding table 16 is connected to the sealing box bottom bolt 17-1, and the lower part of the lower grinding table 16 is connected to the motor 14. This fixing method can provide a very reliable fixing and sealing effect on the sealing box bottom 10 and the lower grinding table 16.

[0059] Preferably, the sealing box bottom fixing device is a shaft sealing device 17-2, the sealing box bottom 10 is connected to the shaft sealing device 17-2 through the sealing box bottom slot 17-2-1, and the shaft sealing device 17-2 is connected to the lower grinding table 16. The cooperation of the shaft sealing device 17-2 prevents the sealing box bottom 10 from rotating with the lower grinding table 16, thereby better ensuring the sealing of the entire sealing box body.

[0060] Preferably, the opening width of the liquid sealing groove 11 is 2~10mm smaller than the bottom width. When the lower bottom 10 of the sealing box rotates with the lower grinding table 16, the sealing liquid part inserted at the lower end of the lower bottom 10 of the sealing box will drive the sealing liquid to rotate. At this time, the sealing liquid plays the role of a dynamic liquid seal. Since the opening width of the liquid sealing groove 11 is 2~10mm smaller than the bottom width, it can be ensured that the sealing liquid will not splash out of the liquid sealing groove 11. The upper and lower surface widths of the rubber ring 30 are not equal, and the upper surface is 2~8mm larger than the lower surface. After the workpiece 15 is clamped and the test force is loaded, the rubber ring 30 is plugged into the remaining gap in the opening of the upper grinding table 29. The rubber rings 30 of different widths can have a better sealing effect on the sealing box body.

[0061] Preferably, the material used for the grinding ball 18 has good wear resistance and insulation properties, and any one of aluminum oxide, silicon carbide, and silicon nitride is used. The ball radius is 1mm~7.5mm. The high wear resistance can perform long-term wear tests on the workpiece 15 to be tested without self-wear. The insulating material prevents galvanic corrosion from occurring during the wear process of the workpiece 15, avoiding the generation of a loop in the entire device.

[0062] Preferably, the material used for the limit pin 13 is an insulating material with a strength >100MPa, such as PEEK, silicon nitride, polytetrafluoroethylene, and glass fiber PPS composite materials. The high-strength limit pin 13 can ensure that the workpiece 15 will not deviate from the initial fixed lower grinding table position during wear, and has excellent mechanical properties of toughness, hardness, and rigidity. It uses thermoplastic engineering plastics with extremely wide applications and excellent impact resistance, heat resistance, and chemical resistance. The insulating material prevents galvanic corrosion from occurring on the workpiece 15 during wear.

[0063] Preferably, the salt mist generator 5 is provided with a solution chamber, a humidification chamber, and an atmosphere chamber. The solution chamber is filled with a simulated solution such as a neutral salt mist medium or an acidic atmosphere simulation medium; the humidification chamber is filled with ultrapure water; and the atmosphere chamber is filled with air or a gas such as SO2.

[0064] Preferably, the method for operating the corrosion simulation medium environment friction and wear device of the present invention comprises the following steps:

[0065] (1) Medium preparation, configure the solution into the solution chamber and liquid seal groove of the salt spray generator, add ultrapure water into the humidifying chamber of the salt spray generator, and add the required atmosphere gas into the atmosphere chamber of the salt spray generator: configure the required salt spray solution, and add the configured solution into the solution chamber of the salt spray generator 5, open the bolt 2 of the sealing box upper cover 31 of the sealing box, open the sealing box upper cover 31 along the joint 31-2 of the sealing box upper cover, add the salt spray solution into the liquid seal groove 11 of the liquid seal device, and cover the lower end of the lower bottom 10 of the sealing box, add sufficient ultrapure water into the humidifying chamber of the salt spray generator 5, and add the simulated atmosphere gas into the atmosphere chamber of the salt spray generator;

[0066] (2) Clamp the workpiece 15 and the counter-grinding ball 18, and install the rubber ring 30 after the test force is applied: press the right end of the deadweight elimination lever 25 at the upper opening of the loading chamber 20. At this time, the upper grinding table 29 is lifted. First, fix the pre-treated workpiece 15 to the lower grinding table 16 through the limit pin 13, and then place the counter-grinding ball 18 between the upper grinding table 29 and the workpiece 15. Loosen the deadweight elimination lever 25 to complete the clamping of the workpiece 15. Replace the upper cover 31 of the sealing box, open the loading chamber door 21, place the weight 23 required for the test on the weight tray 22, close the loading chamber door 21, and install the rubber ring 30 to seal the device after loading.

[0067] (3) Input the test parameters through the display controller 1 and start: Input the test parameters through the display controller. According to the test requirements, input the test parameters such as the temperature inside the sealed box, the humidity inside the sealed box, the motor speed, the motor working time, etc. required for the test on the display controller 1;

[0068] (4) The heating plate 19 and the salt spray generator 5 start working first, the heating plate is heated, and the salt spray nozzle of the corrosive medium providing module provides the corrosive solution to the friction and wear module. After the parameters in step (3) are reached in the sealed box, the motor 14 starts to run at the set speed, driving the workpiece 15 to generate friction with the grinding ball 18;

[0069] (5) When the test set time is reached, the program automatically closes and the workpiece 15 is taken out: When the test set time is reached, the program automatically closes, the salt spray generator 5, the heating plate 19 and the motor 14 stop working, the rubber ring 30 is removed, the upper cover 31 of the sealing box is opened, the deadweight lever 25 is pressed, the workpiece 15 is taken out, and the test ends.

[0070] Preferably, the pre-treatment of the workpiece 15 in step (2) includes: any one or more combinations of rinsing, ultrasonication, degreasing, pickling, shot blasting, and mechanical polishing, with a loading force ranging from 0 N to 1000 N.

[0071] Preferably, the test parameters in step (3) include the temperature inside the sealed box, the humidity inside the sealed box, the motor speed, and the motor working time. The heating plate 19 on the side of the sealed box adjusts the entire ambient temperature so that the temperature inside the sealed box can be controlled in the range of 20°C to 200°C. The salt spray generator 5 can control the humidity inside the sealed box in the range of 50% to 100%, the motor speed is 0 r / min to 2000 r / min, and the motor working time is 0min to 100min. The salt spray generator 5 can perform combined cycle simulation according to any sequence of salt spray, wet heat, and drying and different times.

[0072] Preferably, the method further includes step (6), testing the removed workpiece to obtain the wear rate of the workpiece under corrosion conditions.

[0073] Key technical points of the present invention:

[0074] (1) Dynamic sealing is achieved by using a liquid sealing structure. Liquid seals are suitable for devices with relatively high sealing requirements where the internal and external pressure difference between the seals is not very large. The liquid seal structure has many advantages, such as being able to maintain the pressure and gas atmosphere in the required environment, and also having a good effect on heat preservation and moisture retention of the environment, thereby ensuring the sealing of the device. The present invention uses a liquid seal groove 11 for liquid sealing to ensure the sealing of the entire device. When the lower bottom of the sealing box and the lower grinding table are connected by a shaft seal, the lower bottom of the sealing box is relatively stationary, which can play a good sealing role. When the lower bottom of the sealing box and the lower grinding table are connected by the lower bolts of the sealing box, even if the lower bottom of the sealing box rotates, the opening width of the liquid seal groove is smaller than the bottom surface width, and the sealing of the entire liquid seal device can be ensured during the rotation. In summary, the liquid seal groove has a simple structure and good sealing performance, which provides support for the test environment required for manufacturing;

[0075] (2) A rubber ring is used to seal the openings on the upper grinding table. The structure is simple and the sealing performance is good. The cross-section structure of the rubber sealing ring is extremely simple and has a self-sealing effect, and the sealing performance is reliable. The structure of the rubber sealing ring itself and its installation position is extremely simple and has been standardized, so the installation and replacement are very easy. The present invention uses a rubber ring with unequal widths on the upper and lower surfaces to achieve the sealing of the upper cover of the sealing box and the upper grinding table. The structure is simple. After closing the upper cover of the sealing box, the rubber ring can be directly clamped, and the operation is simple and the sealing performance is good;

[0076] (3) In the lever structure, the lengths of the power arm and the resistance arm are the same, neither saving nor wasting force, nor saving nor wasting distance. When the power arm is greater than the resistance arm, it is a force-saving lever. At equilibrium, the power is less than the resistance. Although it saves force, it wastes distance. When the power arm is shorter than the resistance arm, it is a force-consuming lever, that is, the power is greater than the resistance, consuming force but saving distance. The loading assembly of the present invention adopts a self-weight elimination module and a loading module, both of which are force-saving levers. The self-weight elimination module ensures the loading accuracy. By changing the position and mass of the self-weight elimination weights, the self-weight elimination weights of the self-weight elimination module can eliminate the influence of the self-weights of the upper grinding table, the self-weight elimination lever, the loading lever, and the weight tray on the test force. The force-saving lever adopted by the loading module can use small-mass weights to achieve a large loading force, which can simulate the service conditions of large / heavy loads while facilitating the operation of the experimenter, and realize the precise control and intuitive inspection of the wear loading force;

[0077] (4) A temperature sensor, a humidity sensor, a salt spray generator, and a heating plate are used to precisely control the test environment of the entire corrosion-wear test in real time. While the workpiece is being worn, the required salt spray environment is controlled, which provides a guarantee for exploring the corrosion-wear coupling mechanism of the workpiece. It is integrated into a panel and controlled by a display controller, without separately controlling multiple devices such as a salt spray generator, a heating plate, and a motor, which simplifies the test operation and enhances the operability of the device.

[0078]

Example 1

[0079] The corrosion-wear coupling test is carried out on a 45# steel workpiece 15 with a radius of 10 mm by using the present invention.

[0080] A friction and wear device for a corrosion simulation medium environment includes: a display control and measurement heating module, a corrosion medium providing module, a friction and wear module, a loading assembly, a base 9, and a sealing module;

[0081] The display control and measurement heating module includes: a display controller 1, a temperature sensor 3, a humidity sensor 4, and a heating plate 19;

[0082] The corrosion medium providing module includes: a salt spray generator 5, a salt spray rubber tube 6, and a salt spray nozzle 7;

[0083] The friction and wear module includes: a limit pin 13, a motor 14, a workpiece 15, a lower grinding table 16, a grinding ball 18, and an upper grinding table 29;

[0084] The loading components include: self-weight elimination module and loading module;

[0085] The deadweight elimination module includes: a deadweight elimination lever 25, a deadweight elimination weight 27, and a deadweight elimination fixing rod 28;

[0086] The loading module includes: a loading chamber 20, a loading chamber door 21, a weight tray 22, weights 23, a loading lever 24, and a loading chamber upper opening 26;

[0087] The sealing device includes: a sealing box upper bolt 2, a waste liquid hole 8, a sealing box body 12, a rubber ring 30, a sealing box upper cover 31, and a sealing box bottom fixing device;

[0088] The liquid sealing device includes: a liquid sealing groove 11 and a sealing box bottom 10;

[0089] The sealing box upper cover 31 includes: a sealing box upper bolt fixing hole 31-1, a sealing box upper cover joint 31-2, and an upper grinding table opening 31-3;

[0090] The loading bin 20 is fixed on the base 9; the liquid seal groove 11 is fixed to the bottom of the sealing box body 12, the liquid seal groove 11 is filled with sealing liquid, and the lower end of the lower bottom 10 of the sealing box is inserted into the sealing liquid; the lower surface of the motor 14 is connected to the base 9, the upper part of the motor 14 is connected to the lower grinding table 16, the workpiece 15 is connected to the lower grinding table 16 through the limit pin 13, and the grinding ball 18 is placed between the workpiece 15 and the upper grinding table 29; the bolt 2 on the sealing box passes through the bolt fixing hole 31-1 on the sealing box to connect the sealing box body 12 to the sealing box cover 31, the upper grinding table 29 passes through the upper grinding table opening 31-3, and the rubber ring 30 is placed in the gap between the upper grinding table 29 and the upper grinding table opening 31-3; one end of the deadweight elimination lever 25 passes through The hinge is connected to the upper grinding table 29, the middle part of the self-weight eliminating lever 25 is hinged to the self-weight eliminating fixing rod 28, the self-weight eliminating fixing rod 28 is rigidly connected to the loading bin 20, and the other end of the self-weight eliminating lever 25 is provided with a self-weight eliminating weight 27; one end of the loading lever 24 is installed in the loading bin 20 through a hinge, the middle part of the loading lever 24 is hinged to the upper grinding table 29, and the other end of the loading lever 24 is connected to the weight tray 22; the salt spray nozzle 7 is in the sealed box 12, and the salt spray generator 5 is connected to the salt spray nozzle 7 outside the sealed box 12 through a salt spray rubber tube 6; the temperature sensor 3, the humidity sensor 4, the salt spray generator 5, the motor 14 and the heating plate 19 are connected to the display controller 1.

[0091] The sealing box upper cover 31 can be opened at the sealing box upper cover joint 31-2. An upper grinding table opening 31-3 is provided in the middle of the sealing box upper cover joint 31-2. The diameter of the upper grinding table opening 31-3 is 3 mm larger than the diameter of the upper grinding table 29 at the same horizontal position. The temperature sensor 3 and the humidity sensor 4 are connected to the lower surface of the sealing box upper cover 31. The heating plate 19 is connected to the inner side of the sealing box body 12. The heating plate 19 is used to heat the entire sealing device and maintain the temperature of the sealing device. The waste liquid hole 8 is located at the bottom of the sealing box body 12, and the waste liquid hole 8 is used to discharge waste liquid.

[0092] The sealing box bottom fixing device is the sealing box bottom bolt 17 - 1 , and the sealing box bottom 10 is connected to the lower grinding table 16 via the sealing box bottom bolt 17 - 1 .

[0093] The opening width of the liquid sealing groove 11 is 3 mm smaller than the bottom width. The upper and lower surfaces of the rubber ring 30 have different widths, with the upper surface being 3 mm larger than the lower surface.

[0094] The specific implementation steps are as follows:

[0095] (1) Medium preparation: the solution composition is 5% NaCl + 0.1% Na2SO4 + residual H2O. After preparation, adjust the pH value of the solution to 4 with 5% dilute hydrochloric acid. Add the prepared solution to the salt spray generator 5, open the upper cover 31 of the sealing box, add the salt spray solution to the liquid sealing tank 11, add ultrapure water to the humidification chamber of the salt spray generator 5, and add SO2 gas to the atmosphere chamber of the salt spray generator;

[0096] (2) Clamp the workpiece 15, press the deadweight lever 25 through the upper opening 26 of the loading chamber, fix the 45# steel workpiece that has been rinsed and ultrasonically pre-treated to a smooth surface to the lower grinding table 16 through the PEEK material limit pin 13, and place two Si3N4 grinding balls 18 between the upper grinding table 29 and the 45# steel workpiece 15, and replace the upper cover 31 of the sealing box;

[0097] (3) Test force loading: open the loading chamber door 21, add a weight 23 corresponding to the test force of 100 N on the weight tray 22, close the loading chamber door 21 and clamp the rubber ring 30;

[0098] (4) Input the test parameters on the display controller 1. According to the test requirements, input the set experimental parameters on the display controller. The temperature inside the sealed box is 40℃, the humidity inside the sealed box is 90%, the motor speed is 400 r / min, the motor rotation time is 10 min, and the salt spray generator 5 is set to salt spray for 3 minutes, wet heat for 3 minutes, and SO2 drying for 4 minutes;

[0099] (5) Start the program. Start the set program in the display controller 1. The heating plate 19 and the salt spray generator 5 start working first. When the atmosphere in the sealed box 12 reaches a temperature of 40°C and a humidity of 90%, the motor 14 starts to run at a speed of 400 r / min, and the wear test officially begins.

[0100] (6) After the time reaches 10 minutes, the program automatically shuts down, the upper cover 31 of the sealed box is opened, and the 45# steel workpiece is taken out, and the test ends.

[0101] The wear marks on the workpiece were obtained using a Keyence Vk-200 laser confocal microscope. The depth and width of the wear marks were 48 μm and 1100 μm, respectively. The wear marks on the wear sample were obvious and uniform, and the wear volume was 1.12 mm. 3 The calculated wear rate was 8.948E-5mm³ / (N·m). A workpiece made of the same material, tested using a normal wear machine with the same test parameters, had a wear rate of 6.328E-5mm³ / (N·m). This demonstrates that the sealed salt spray atmosphere in the experimental design had an impact on workpiece wear, achieving the test objectives. Therefore, the method of this invention can be used to complete coupled corrosion-wear testing on wear specimens.

[0102] [Example 2]

[0103] The present invention was used to conduct a corrosion-wear coupling test on a Q235-A workpiece 15 with a radius of 8 mm.

[0104] The difference from Example 1 is that:

[0105] like Figure 3 As shown, the sealing box bottom fixing device is a shaft sealing device 17-2, the sealing box bottom 10 is connected to the shaft sealing device 17-2 through the sealing box bottom clamping groove 17-2-1, and the shaft sealing device 17-2 is connected to the lower grinding table 16;

[0106] The diameter of the upper grinding table opening 31-3 is 4mm larger than the diameter of the upper grinding table 29 at the same horizontal position. The opening width of the liquid seal groove 11 is 5mm smaller than the bottom width. The upper and lower surfaces of the rubber ring 30 are not equal in width, and the upper surface is 5mm larger than the lower surface.

[0107] In step (1), the solution composition is 6% NaCl + 0.08% Na2SO4 + remaining H2O, no ultrapure water is added to the humidification chamber of the salt spray generator 5, and the atmosphere chamber of the salt spray generator 5 is filled with air;

[0108] The pre-treatment in step (2) includes degreasing and pickling. The grinding ball 18 is made of silicon oxide with a sphere radius of 3 mm. The limiting pin 13 is made of polytetrafluoroethylene.

[0109] In step (3), add a weight 23 corresponding to a test force of 50 N;

[0110] In step (4), the display controller 1 inputs the test parameters as the temperature in the sealed box: 40 °C, the humidity in the sealed box: 90%, the motor speed: 300 r / min, the motor rotation time: 5 min, and the salt spray generator 5 is set to operate in the salt spray + air combination for 5 minutes;

[0111] In step (5), when the atmosphere in the sealed box 12 reaches a temperature of 40 °C and a humidity of 90%, the motor 14 starts to operate at a speed of 300 r / min, and the wear test officially begins;

[0112] In step (6), after 5 minutes, the program automatically shuts down, the upper cover 31 of the sealed box is opened, and the Q235-A workpiece 15 is taken out, and the test ends.

[0113] The depth of the wear mark on the workpiece is obtained as 84 μm and the width is 1950 μm using a Keyence Vk-200 type laser confocal microscope. Observe the contour after wear. The obtained wear marks are obvious and uniform, and the wear volume of 2.02 mm 3 , and its wear rate is calculated as 13.948E-5 mm³ / (N·m). For workpieces of the same material, a wear test is carried out according to the same test parameters by a normal wear machine, and the wear rate is 10.355E-5 mm³ / (N·m). This shows that the designed sealed salt spray atmosphere has an impact on the wear of the workpiece and achieves the test purpose. Therefore, using the method of the present invention, a corrosion-wear coupling test can be completed on the wear sample.

[0114]

Example 3

[0115] A corrosion-wear coupling test is carried out on a Cr12MoV die workpiece 15 with a radius of 15 mm using the present invention.

[0116] The differences from Example 2 are as follows:

[0117] The diameter of the opening 31-3 on the upper grinding table is 6 mm larger than the diameter of the upper grinding table 29 at the same horizontal position. The opening width of the liquid seal groove 11 is 7 mm less than the bottom width. The upper and lower surface widths of the rubber ring 30 are not equal, and the upper surface is 6 mm larger than the lower surface;

[0118] In step (1), the solution is prepared to simulate the environment of Sansha, Hainan. The solution composition is 3.5% NaCl + 0.1% Na2SO4 + the remaining H2O. After preparation, the pH of the solution is adjusted to 5 with 5% dilute hydrochloric acid, and ultrapure water is added to the humidification chamber of the salt spray generator 5;

[0119] The pre-treatment in step (2) includes shot blasting and mechanical grinding and polishing; the grinding ball 18 is made of alumina with a spherical radius of 5 mm; the limiting pin 13 is made of glass fiber PPS composite material;

[0120] In step (3), add a weight 23 corresponding to a test force of 150 N;

[0121] In step (4), the test parameters input to the controller 1 are: temperature in the sealed box: 50°C, humidity in the sealed box: 95%, motor speed: 800 r / min, motor rotation time: 15 min, and the salt spray generator 5 is set to salt spray for 10 minutes and wet heat for 5 minutes;

[0122] In step (5), when the atmosphere in the sealed box 12 reaches a temperature of 50°C and a humidity of 95%, the motor 14 starts to operate at a speed of 800 r / min, and the wear test officially begins;

[0123] After the time reaches 15 minutes in step (6), the program is automatically closed, the upper cover 31 of the sealed box is opened, and the Cr12MoV mold steel workpiece 15 is taken out, and the test ends.

[0124] The wear marks of workpiece 15 were obtained using a Keyence Vk-200 laser confocal microscope. The depth of the wear marks was 40 μm and the width was 988 μm. The wear marks of the wear sample were observed to be obvious and uniform. The wear volume was 1.52 mm. 3 The calculated wear rate was 7.998E-5mm³ / (N·m). A workpiece made of the same material, tested using a normal wear machine with the same test parameters, had a wear rate of 6.597E-5mm³ / (N·m). This demonstrates that the sealed salt spray atmosphere in the experimental design had an impact on workpiece wear, achieving the test objectives. Therefore, the method of this invention can be used to complete coupled corrosion-wear testing on wear specimens.

[0125] The foregoing description shows and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the application concept described herein by the teachings above or by techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. A friction and wear test device for a corrosion-simulating medium environment, characterized in that Comprising: a display control and measurement heating module, a corrosion medium providing module, a friction and wear module, a loading component, a base, and a sealing module; wherein, the display control and measurement heating module is used to provide test parameters for the device, measure and heat the environment of the friction and wear module, and display relevant parameters during the operation of the device; the corrosion medium providing module is used to provide a corrosion medium for the friction and wear module; the friction and wear module includes a counter ball and a workpiece, the workpiece generates wear by friction with the counter ball, and a wear-corrosion test is performed on the workpiece in an environment of a corrosion medium; the loading component is used to provide a loading force for the friction and wear module; the sealing module is used to seal the friction and wear module; wherein, the display control and measurement heating module includes a display controller, and a temperature sensor, a humidity sensor, and a heating plate connected thereto; wherein, the friction and wear module further includes a limit pin, a motor, a lower grinding table, and an upper grinding table; wherein, the lower surface of the motor is connected to the base, the upper part of the motor is connected to the lower grinding table, the limit pin, the workpiece, and the counter ball are arranged between the upper grinding table and the lower grinding table, and the counter ball is arranged between the upper grinding table and the workpiece; the limit pin is arranged between the workpiece and the lower grinding table; wherein, the sealing module includes an upper bolt, a sealing box body, a sealing box upper cover, and a sealing box lower bottom; wherein, the upper bolt connects the sealing box body and the sealing box upper cover; the temperature sensor and the humidity sensor are arranged on the inner surface of the sealing box upper cover, and the heating plate is arranged on the inner side surface of the sealing box body; the sealing box lower bottom is connected to the lower grinding table; wherein, the corrosion medium providing module includes a salt spray generator, a salt spray rubber tube, and a salt spray nozzle; wherein the salt spray nozzle is arranged on one side of the sealing box body opposite to the heating plate, the salt spray generator is arranged outside the sealing box body, and is connected to the salt spray nozzle through the salt spray rubber tube; wherein, the loading component includes a loading module, and the loading module includes: a loading bin, a weight tray, weights, and a loading lever; the loading bin is arranged on the base, one end of the loading lever is installed in the loading bin, the middle part of the loading lever is connected to the upper grinding table, the other end of the loading lever is connected to the weight tray, and the weights are arranged in the weight tray; wherein, the loading component further includes a self-weight elimination module, and the self-weight elimination module includes: a self-weight elimination lever, a self-weight elimination weight, and a self-weight elimination fixing rod; wherein, one end of the self-weight elimination lever is connected to the upper grinding table, the middle part of the self-weight elimination lever is connected to the self-weight elimination fixing rod, the self-weight elimination fixing rod is connected to the loading bin, and a self-weight elimination weight is arranged at the other end of the self-weight elimination lever; 2. The friction and wear test device for corrosive simulated medium environment according to claim 1, characterized in that, The material of the counter ball is any one of alumina, silicon carbide, and silicon nitride, and the radius is 1 mm to 7.5 mm.

3. A test method for a friction and wear test device in a corrosive simulation medium environment, characterized in that, The test method is implemented by using the corrosion simulation medium environment friction and wear test device described in claim 1 or 2, and includes the following steps: (1) The corrosion medium providing module configures a corrosion solution; (2) Install the counter grinding ball and the workpiece between the upper grinding table and the lower grinding table, fix the workpiece to the lower grinding table through the limit pin, then load weights into the weight tray, and perform sealing after the loading is completed; (3) Input the test parameters through the display controller and start the device; (4) The heating plate conducts heating, and the salt spray nozzle of the corrosion medium supply module supplies the corrosion solution to the friction and wear module. After the test parameters input in step (3) are reached in the sealed box, the motor starts to run at the set speed, driving the workpiece to move and generate friction with the counter grinding ball; (5) After reaching the test set time, turn off the device and take out the workpiece.

4. The test method of the corrosion simulation medium environment friction and wear device according to claim 3, characterized in that It also includes step (6) testing the taken-out workpiece to obtain the wear rate of the workpiece under the condition of corrosion.

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