JPH10260124A - Method and apparatus for friction and wear test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method and an apparatus in which the lubricating characteristic of a molten lubricant (a molten substance) as well as the friction and wear characteristic of a casting mold material can be evaluated by a method wherein the molten substance is injected between the outer circumference of a heated rotating cylinder and the contact face of a block and the rotational- speed waveform of the rotating cylinder is controlled. SOLUTION: A rotating cylinder 16 is turned by a servomotor 18, and a block 11 is pressed to the outer circumferential face of the rotating cylinder 16 by a cylinder 9. A molten substance 27p which is melted by a melting furnace 29 and whose temperature is 800 deg.C or higher is injected continuously, via an injection pipe 31, between the rotating cylinder 16 and the contact face of the block 11. The block 11 is pressed to the rotating cylinder 16 by a pressure load P, and the rotating cylinder 16 is turned. At this time, a frictional force F is measured by a load cell 10a, and the pressure load P is measured by a load cell 10b so as to be processed by a data processor 35, and a coefficient of friction μ= F/P is computed by a computing unit 24 so as to be recorded (or displayed) as data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for testing friction and wear used to evaluate the lubrication characteristics of a lubricant used in continuous casting and the friction and wear characteristics of a mold material at high temperatures. It is.

[0002]

2. Description of the Related Art Conventionally, in the field of steel, for example, a fixed mold type continuous casting machine has been used for continuous casting of steel. In this continuous casting machine, as shown conceptually in FIG. 7, molten steel s is poured from a tundish a into a water-cooled copper mold b vibrating by a mold vibrator (not shown), and cooled by this mold. Thus, a solidified shell ss is formed, and the obtained cast slab sc is cooled while being supported via a large number of support rolls r disposed below the mold, and then is discharged.

In this continuous casting machine, a water-cooled copper mold b
When the solidified shell ss is formed by the above, a glass-based lubricant (powder) c is poured into the water-cooled mold b, and the lubricant is melted and interposed between the molten steel s and the inner surface of the water-cooled mold b. Lubrication between the molten steel (solidified shell) in the solidification process. If the lubricating action of the lubricant does not function effectively, breakout is likely to occur, making continuous casting impossible or making it difficult to obtain good slabs. Further, in addition to the heat load, the mold is susceptible to friction and wear with the solidified metal, which causes a problem that the life of the mold is shortened and continuous casting operation cannot be performed for a long time.

In order to prevent such problems from occurring, it is essential to develop a mold material and a lubricant having excellent characteristics. It is indispensable to conduct a property evaluation test capable of accurately evaluating the properties of (molten lubricant). When performing this characteristic evaluation test on a real machine, it is not only costly but also difficult to perform the test under various test conditions because it involves operational danger. In particular, a friction / wear test method (apparatus) capable of performing a property evaluation test on friction / wear at high temperatures is required.

Conventionally, as a friction / wear test method (apparatus) to meet such a demand, two objects (cylinder-
There is known a friction / wear test method in which a liquid, a solid, or the like is injected into a contact surface of a cylinder, a cylinder-block, a ring-ring, and the like. For example, Japanese Patent Application Laid-Open No. Sho 62-172238 discloses a method and an apparatus for testing a casting material for continuous casting.

[0006] In this method, the dummy bar is lowered at a constant speed, the contact surface of the molten metal with the model mold is cooled, the molten metal is solidified, pulled out of the model mold and cast, and the sample is analyzed by disassembling the mold. Although it is a friction and wear test method and apparatus that simulates a continuous casting mold, the dummy bar is pulled out vertically, so it is difficult to test for a long time, and the friction and wear between the lubricant and the mold melted at high temperature.
It is not enough to accurately evaluate the wear characteristics.

Further, Japanese Patent Application Laid-Open No. 6-102160 discloses a wear test method and apparatus. This is a wear test method and apparatus in which a lubricant such as solid, liquid, or powder is injected into a contact surface from a lower ring in a ring-ring test in a high-temperature atmosphere, and the friction and wear characteristics in a lubricated state can be evaluated. However, since it does not have a device for melting and pouring, it is difficult to perform a test using a high-temperature melt such as a powder for continuous casting.

On the other hand, the reference document “Viscoelastic behavior of mold powder for continuous casting of steel” ｛“Iron and steel” VOL. 81 N
o. 12 (1995, 12), 1145 to 1149P}
In an electric furnace maintained in an Ar atmosphere, a powder for continuous casting is sandwiched in a gap between an upper disk (slab) and a lower disk (mold), and the upper disk (slab) rotates at a constant speed corresponding to a casting speed. By rotating the number, the lower disk gives an oscillation equivalent to the vibration of the mold,
A friction force simulator capable of simulating casting conditions of an actual machine is disclosed. In this case, the frictional force can be measured in the powder lubricated state, but the powder does not flow, which is different from the casting state of the actual machine, and the film thickness of the powder becomes constant, so that the mold material cannot be tested.

[0009]

SUMMARY OF THE INVENTION The present invention makes it possible to perform a friction / wear test at a high temperature with a molten lubricant interposed therebetween. Under the conditions, it is possible to evaluate the lubrication characteristics of the molten lubricant (melt) and the friction and wear characteristics of the mold material.
A friction / wear test method and apparatus for performing a wear test are provided.

[0010]

Means for Solving the Problems The first invention of the present invention is:
In the friction / wear test method in which two objects are brought into rotary contact,
One object is a heated rotating cylinder and the other is a block. The melt is injected between the outer peripheral surface of the rotating cylinder and the contact surface of the block, and the rotation speed waveform of the rotating cylinder is controlled to control the rotation speed. A friction / wear test method characterized in that a friction / wear test is performed by applying the vibration conditions described above.

[0011] The second invention is positioned as an example of a friction / wear test apparatus for carrying out the first invention.
A heating and rotating device that mounts and rotates a rotating cylinder while heating, a block fixing device that cools and allows the block to move forward and backward, a melting furnace equipped with a heating device, and controls the amount of molten material injected from this melting furnace. A flow control device, and an injection pipe insulated at the injection port of the melting furnace. The injection pipe from the melting furnace is provided between the rotating cylinder mounted on the heating rotary device and the block mounted on the block fixing device. A friction / wear test apparatus characterized in that a molten material can be injected through the apparatus.

A third invention is a friction / wear test apparatus according to any one of the second inventions, wherein the rotation device of the heating rotation device can control the rotation speed to an arbitrary waveform. According to the fourth invention, in any one of the second invention and the third invention, the block fixing device is provided with a microscope with a built-in camera, and the back surface of the block fixed to the block fixing device with the microscope with a built-in camera. An observation hole that allows observation is provided, a through hole is provided in the center of the block that comes into contact with the outer peripheral surface of the rotating cylinder, and a light-transmitting heat-resistant material is embedded in the through-hole. A friction / wear test apparatus characterized in that a state of an outer peripheral surface of a rotating cylinder and a contact surface of a block can be continuously observed during a test with a microscope.

[0015] In a fifth aspect of the present invention, in any one of the first to fourth aspects, a projection device for illuminating light is provided on the side of the block fixing device, and the illuminating light is embedded in the block through a translucent heat-resistant material. The friction and wear test apparatus, characterized in that the outer peripheral surface of the rotating cylinder is projected onto the contact surface between the block and the state of the contact surface so that the state of the contact surface can be continuously observed by a microscope with a built-in camera, The friction / wear test apparatus according to any one of the first to fifth inventions, wherein the block mounting portion of the block fixing device can reciprocate up and down, the seventh invention is a first invention to In any one of the sixth inventions, the brush roll is pressed against the outer peripheral surface of the rotating cylinder, and is arranged so as to be rotatable, so that oxides and deposits on the outer peripheral surface of the rotating cylinder can be removed. Characteristic friction and friction It is a test apparatus.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a friction / wear test method and apparatus for injecting a molten material between a peripheral surface of a rotating cylinder and a contact surface of the block while bringing the heated rotating cylinder and the block into rotary contact. For example, it is used for a lubrication property of a lubricant used in continuous casting of steel and a friction / wear test of a mold material.

In the friction / wear test method, two objects that are in contact with each other and are interlocked with each other are a rotating cylinder heated to a temperature equal to or higher than the melting point of the melt and a block. A glass-based material corresponding to a lubricant in a molten state is injected, and the rotation speed of the cylinder is controlled to an arbitrary waveform so that arbitrary mold vibration conditions can be given.

Here, the molten material corresponds to a molten lubricant (powder), and is composed of Sio ₂ , CaO, Na ₂
A glass-based material containing a large amount of O or the like is melted, has a melting point of 800 ° C. or more, and is obtained by melting in a melting furnace. The rotating cylinder is equivalent to a solidified shell in the case of continuous casting, and is a cylindrical or short columnar (short columnar) formed of various steels continuously cast such as carbon steel and stainless steel. (Hereinafter referred to as “rotating cylinder”), which corresponds to the solidification shell temperature.
It is desirable to be able to heat to the 00 ° C level. As the heating device, a high-frequency induction heating device or an energization heating device which has good temperature controllability and can heat to a predetermined temperature in a short time is preferable.

The block is equivalent to a water-cooled mold in the case of continuous casting, and is formed of ceramics or the like in addition to copper used as a mold material, a metal plate having a metal plating or spray coating layer on a copper surface. Yes, it is mounted on a block fixing device so as to be fixed or capable of moving up and down. In addition, the drive device for rotating the rotating cylinder includes a servo motor or the like that can easily obtain an arbitrary vibration condition by changing a rotation speed waveform to a sine wave, a rectangular wave, a combined waveform of these, and other arbitrary waveforms. It is suitable.

The friction / wear test apparatus has a structure in which a rotating cylinder can be mounted and rotated while heating, and a block can be cooled and moved forward and backward. While maintaining the temperature at which the molten
An injection pipe is provided between the outer peripheral surface of the rotary cylinder and the block so that an appropriate amount can be injected. This injection pipe can be omitted, and the melt can be supplied directly from the melting furnace to the space between the outer peripheral surface of the rotary cylinder and the block.

As the melting furnace, an electric heating apparatus using a silicon carbide heating element or the like which has good temperature controllability and can be heated to a predetermined temperature in a short time is preferable. When a melt injection tube is connected to the melting furnace, the injection tube is preferably made of a heat-resistant material that does not react with the melt, such as graphite, ceramics, and platinum. It is effective to provide a heat retention device or a heating device so that the temperature drop can be suppressed or the temperature can be compensated during the process of injecting the resin between the outer peripheral surface and the block. As this heating device, an electric heating device using a silicon carbide heating element or the like is preferable.

In this friction / wear test apparatus, when the temperature of the rotating cylinder is 1200 ° C. or higher, the transmitted light is captured by the camera-incorporated microscope through the transparent heat-resistant material embedded in the center of the block. It is effective to be able to continuously observe the lubrication state on the contact surface between the outer peripheral surface of the rotating cylinder and the block. As this translucent heat-resistant material, 1400
Translucent sapphire, heat-resistant glass, etc., which do not impair the transparency at a temperature of the order of ° C., are suitable. As the camera-incorporated microscope, a camera-incorporated microscope having a magnifying function of twice or more and capable of distinguishing the color tone is more preferable.

When the temperature of the rotating cylinder is lower than 1200 ° C., transmitted light cannot be obtained, and the lubrication state at the contact surface between the outer peripheral surface of the rotating cylinder and the block may not be observed with high accuracy. In such a case, the illumination light attached to the microscope with built-in camera is projected through a transparent heat-resistant material embedded in the center of the block to accurately observe the lubrication state at the contact surface between the cylinder and the block. Being able to do so is also effective. In this case, it is preferable that the illumination light to be projected has good transmittance,
As a lighting device, it is preferable to use a halogen lamp type lighting device which can obtain such illumination light. In addition,
In this friction / wear test apparatus, oxides and the like adhere to the surface of the rotating cylinder, which lowers the test accuracy. Therefore, it is preferable to remove the deposits attached to the surface of the rotating cylinder.

According to the present invention described above, a long-term friction / wear test simulating actual machine conditions can be performed using a glass-based melt having a melting point of 800 ° C. or more as a lubricant. Friction and wear tests using a molten material with a melting point of 800 ° C or higher as a lubricant have become possible. Can be

[0023] The actual machine test is not only expensive but also difficult to practice because of various operational dangers. However, according to the present invention, a test simulating the actual machine condition is studied. Not only can it be done at room level at low cost,
Testing under difficult conditions is also possible with actual equipment.

Further, the friction coefficient is measured as quantitative data, and at the same time, the lubrication state of the outer peripheral surface of the rotating cylinder and the block interface can be captured as image data. The friction coefficient changes depending on the thickness and the flow state of the melt layer. Since it is possible to obtain image data indicating the friction coefficient and the lubrication state at the same time, it is extremely effective in elucidating the mechanism of friction and wear and developing molten materials (lubricating powder) and mold materials.

In the case of continuous casting, by controlling the rotation speed of the rotating cylinder, in the case of continuous casting, it is possible to simulate the slab drawing speed of the actual machine and the conditions of mold vibration for the block corresponding to the mold. Since only one device is required, the device can be simplified. In addition, the outer surface of the rotating cylinder in contact with the block can be kept clean with almost no oxides or deposits, and the test can be performed in the atmosphere without the need for expensive inert gas atmosphere. Can be inexpensive.

The present invention can be carried out by a friction / wear test apparatus (example) shown in FIG. Hereinafter, the present invention will be specifically described. This example is for evaluating friction and wear characteristics in relation to a water-cooled mold material and a molten lubricant in continuous casting of steel.

In FIG. 1, reference numeral 1 denotes a block fixing device, which includes a base plate 2, a base plate 4 which is movable on the base plate via a linear guide 3 in a horizontal direction, and a base plate 2. , A water-cooling box 7 movably mounted vertically on the support via a linear guide 6, a camera built-in microscope 8 mounted on the base plate 4, and a camera built-in Lighting device 8 attached to a scanning microscope
L, a cylinder 9 disposed on the other end side of the base plate 2 to move the base plate 4 forward and backward, a load cell 10a disposed between the water-cooling box 7 and the base plate 4, and disposed on the cylinder 9 side. And a load cell 10b. In addition, prop 5
A guide pipe 12 is inserted through the center of the linear guide 6 and the water-cooling box 7 so that the outside of the water-cooling box 7 can be observed through the guide pipe 12 by the camera built-in microscope 8.

The block 11 corresponding to the mold material is formed by forming a copper plate or a copper plate having a surface coated with a heat-resistant and abrasion-resistant coating such as plating and thermal spraying into a block shape. , Cooling from the back during the test. The block 11 is formed by fitting a transparent heat-resistant material into a through hole 13 provided in the center of the observation window 1.
4 is formed, and the outside thereof can be observed through the observation window by the camera built-in microscope 8 while being attached to the water-cooled box 7. The block 11 can be advanced and retracted by the cylinder 9 and can be brought into contact with and pressed against the outer peripheral surface of a rotating cylinder described later.

Reference numeral 15 denotes a heating and rotating device, which has a rotating shaft 17 on which a rotating cylinder 16 corresponding to a solidified shell of molten steel is fitted and mounted, and a rotating speed waveform can be arbitrarily controlled and arbitrary vibration conditions can be imparted. A servo motor 18 corresponding to
A heating device 19 capable of heating the rotating cylinder 16;
6 comprises a brush roll 21 for removing the deposit 20 on the outer peripheral surface. This brush roll is cylinder 2
2, it can move forward and backward, and can be brought into contact with and pressed against the rotating cylinder, and can be rotated by the driving device 23. The brush roll 21 is used to remove deposits such as oxides and molten powder on the surface generated by heating the rotary cylinder 16. The brush roll removes the outer peripheral surface of the rotary cylinder 16 even in an air atmosphere. It is intended to maintain a clean state during the test and to enable a long-term continuous test.

The heating / rotating device 15 for the rotary cylinder 16 has a configuration in which the outer peripheral surface of the rotary cylinder 16 is mounted on the block 1 while the rotary cylinder 16 is fitted on the rotary shaft of the servomotor 18.
1 is disposed at a position where it is brought into contact with and pressed by the cylinder 9. The rotating cylinder 16 is rotated at a predetermined rotation speed waveform by a servomotor 18 program-controlled by a computing device 24 via a control device 25, and vibrates under desired vibration conditions. Further, the heating device 19 heats to a temperature of 1400 ° C. or higher through the control device 26 through the arithmetic device 24.

The rotary cylinder 16 is formed in a cylindrical shape from a material manufactured by continuous casting such as carbon steel or stainless steel, and a hollow portion thereof is fitted and mounted on a rotary shaft 17 of a servomotor 18. The brush roll 21 is pressed against and contacted with the outer peripheral surface of the rotary cylinder 16 by the cylinder 22 and is rotated by the driving device 23 so that oxides and deposits attached to the outer peripheral surface of the rotary cylinder 16 can be removed. It has become.

Above the rotary cylinder 16 and the block 11, a glass-based material 27 corresponding to a lubricant (powder) is provided.
And a melting furnace 29 for heating and melting the same by a heating device 28 is provided. The melting furnace is provided with an inlet 30, and the inlet is provided with the molten glass-based material 2.
The injection pipe 31 of the melt 27p of No. 7 is connected, and its tip is located close to the contact surface between the block 11 and the rotary cylinder 16.

Melt 27 obtained by melting in melting furnace 29
p is injected between the contact surface of the block 11 and the rotating cylinder 16 through the injection pipe 31. At this time, the stopper 3
2 controls the injection amount to an appropriate amount. In addition, the injection pipe 31
Is provided with a heating device 32.
The temperature of the melt 27p from is controlled by a thermometer 33, and is always kept at a flow temperature (generally, a melting point +50 to 100 ° C.) or higher.

A case where a friction / wear test is performed using the friction / wear test apparatus thus configured will be described. The rotating cylinder 16 is rotated by a servo motor 18, and the block 11 is pressed against the outer peripheral surface of the rotating cylinder 16 by bringing the block 11 into contact with the cylinder 9. In this case, the servo motor 18 is controlled by the arithmetic device 24 via the control device 25 by a preset rotation speed waveform program.
Rotate under vibration conditions corresponding to mold vibration.

Between the contact surface of the rotating cylinder 16 and the block,
Melt 2 at a temperature of 800 ° C. or higher melted in melting furnace 29
7p (corresponding to molten lubricating powder) is continuously injected through the injection pipe 31. The injection amount is controlled to a predetermined amount by adjusting the opening of the injection port 30 by the stopper 32. The block 11 is pressed against the rotating cylinder 16 with a predetermined pressing force by the cylinder 9 via the control device 34 by the arithmetic device 24.

The frictional force F when rotating the rotary cylinder 16 by pressing the block 11 against the rotary cylinder 16 with the pressing load P while injecting the melt 27p between the outer peripheral surfaces of the rotary cylinder 16 is determined by the load cell 10a. In addition, the pressing load P is measured by the load cells 10b, processed by the data processing device 35 based on the outputs from both load cells, the friction coefficient μ (= F / P) is calculated by the calculation device 31, and recorded as data (display). I do. At this time, the contact image between the block 11 and the cylinder 16 observed by the camera built-in type microscope 8 through the observation window 14 and the guide pipe 12 is transmitted to the image processing device 36.
And the arithmetic unit 24 rotates the rotary cylinder 16 and the block 1
1. Synchronously record (display) the lubrication state of the melt so that the friction coefficient and the lubrication state can be output correspondingly.

When the temperature of the rotating cylinder 16 is 1200 ° C. or higher, a contact image showing a lubricated state is obtained by transmitting the molten material layer with transmitted light generated on the surface of the rotating cylinder 16. When the temperature is lower than 1200 ° C., the generation of transmitted light is insufficient and the observation accuracy may be reduced. In this case, a contact image between the block 11 and the melt is obtained by the reflected light from the surface of the melt 27p by projecting illumination light from a halogen lamp 8L built in the outer periphery of the camera lens of the built-in camera type microscope 8. Thus, the image data is input to the image processing device 36.

The actual vibration condition in the continuous casting mold is a composite vibration by a combination of a constant speed of the slab withdrawing speed and a periodically fluctuating mold vibration speed. Such vibration conditions are determined by controlling the rotation speed waveform of the servomotor 18 by program control.
6, the block is vibrated under the vibration conditions equivalent to the actual machine between the block and the outer peripheral surface of the rotating cylinder even while the block is fixed.

In this way, using the melt as a lubricant,
A long-term friction / wear test that simulates actual machine conditions becomes possible.
It is possible to perform friction and wear tests between the lubricant and the mold in continuous casting of steel, using the melt at ℃ or higher as a lubricant, and the lubrication characteristics under various conditions that are difficult with an actual machine, and the friction of the mold material under the melt lubrication The coefficients can be known simultaneously.

The present invention is not limited to the contents shown in the above examples. For example, in the above example, the block 11 of the block fixing device 1 is vertically movable by the linear guide 6 so that the vertical position can be finely adjusted. For example, as shown in FIG. By providing the cylinder 37 on the top and moving the mounting portion of the block 11 up and down more positively, for example, by intermittently contacting the block with the outer peripheral surface of the rotating cylinder, it is possible to provide a wider range of test conditions.

In the above example, a block corresponding to a water-cooled mold in continuous casting of steel, a melt corresponding to a lubricant (powder), and a rotating cylinder corresponding to a solidified shell of molten steel have been described. However, the present invention is applied to other fields, for example, friction and wear tests of seamless pipe drilling tool materials and melt-based lubricants, or heat-resistant materials and melt-based lubricants such as high-temperature bearings using melt-based lubricants. It is also applicable to friction and wear tests.

The block shape, mounting structure, block cooling structure (with or without), block fixing device, heating rotating device, melting furnace and injection pipe, various heating devices, and the structure of the control system are as follows: Claim 1 according to the test object, actual operating conditions, etc.
There is a change within the scope of the claims.

[0043]

EXAMPLE Using a friction / wear test apparatus (example) of the present invention configured as shown in FIG. 1, a friction / wear test simulating continuous casting of steel using a lubricant (powder) as a lubricant was conducted. . FIG. 3 shows an example of controlling the rotational speed waveform of the rotating cylinder by the servomotor in this embodiment.
FIG. 4 shows an example of a friction coefficient obtained by experimenting with the rotation speed waveform of FIG. 3, and FIG. 5 shows an example of an average friction coefficient.

As shown in FIG. 5, when the lubricant (melt) is not interposed, the friction coefficient is as large as 0.3, and when the lubricant (melt) is interposed, the friction coefficient decreases.
The coefficient of friction is 0.05 to 0.1 depending on the heating temperature of the rotating cylinder.
It was found to change in the range of 5. This was not found in the conventional friction and wear tests.

When the heating temperature of the rotating cylinder is 1200 ° C. or higher, a contact image showing the lubrication state, which is transmitted through the melt layer by the transmitted light from the surface of the rotating cylinder, is obtained. When the temperature is lower than 1200 ° C., since the generation of the transmitted light from the surface of the rotating cylinder is insufficient, the illumination light is projected from the illumination device attached to the TV camera,
A contact image showing the lubrication of the block and the melt was obtained.

According to the present invention, the temperature of the rotating cylinder is 1200 ° C.
In the above case, the contact image can be observed even when the temperature is lower than 1200 ° C., and by changing the temperature of the rotating cylinder, a contact image indicating the lubrication state obtained by the transmitted light and the reflected light of the illumination light is obtained. The effect can be evaluated with high accuracy.

As described above, the friction coefficient and the lubrication state (the state of formation of the lubricating film) in a high temperature state, which could not be directly known in the past, can be simultaneously known. By analyzing these information, It was found that it was possible to develop mold materials and lubricants from a new perspective.

FIG. 6 shows a comparison between the results of a wear test of a mold material according to the present invention and the results of mold wear in an actual machine. From this figure, both results are in good agreement, indicating that the accuracy of the friction and wear test of the mold material according to the present invention is high.

As described above, according to the method and apparatus for testing friction and abrasion according to the present invention, the melting point is continuously maintained for 80 hours.
Not only is it possible to perform friction and wear tests using a melt of 0 ° C or higher as a lubricant, but also to observe the lubrication state and measure the friction coefficient at the contact surface between the outer peripheral surface of the rotating cylinder and the block at the same time. In addition, the test accuracy has been greatly improved, and tests can be performed under difficult conditions with actual equipment.

[0050]

According to the present invention, a long-term friction / wear test simulating actual machine conditions can be performed using a high-temperature melt as a lubricant. Friction and wear tests as lubricating materials become possible,
It is possible to clarify the lubricating properties of the melt under various conditions that are difficult with actual equipment, and the friction and wear properties of high-temperature resistant materials under lubrication with a high-temperature melt. Not only can tests simulating real machine conditions be performed at a laboratory level at low cost, but also tests under difficult conditions can be performed with real machines.

Further, while measuring the friction coefficient as quantitative data, the lubrication state of the outer peripheral surface of the rotating cylinder and the block interface can be captured as image data, and the friction coefficient changes depending on the thickness and flow state of the melt layer. Since the friction coefficient and the image data can be obtained at the same time, it is extremely effective for elucidating the mechanism of friction and wear, and for developing molten materials (for example, powder for continuous casting) and materials.

By program-controlling the rotation speed of the cylinder for the block, it is possible to simulate, for example, the conditions of the actual machine, for example, the slab drawing speed and the mold vibration.
Since only one device is required, the device can be simplified. Also,
By the brush roll, the surface of the cylinder in contact with the block can be kept clean with almost no oxides or deposits, and there is no need for an effective inert gas atmosphere.

[Brief description of the drawings]

FIG. 1 is a partially schematic cross-sectional side schematic explanatory view showing an embodiment of a friction / wear test device of the present invention.

FIG. 2 is a partially schematic cross-sectional side view schematically illustrating an example of the structure of a fixed block mounting portion when the block is moved up and down by the friction / wear test device of the present invention.

FIG. 3 is an explanatory diagram showing a rotation speed waveform of the rotating cylinder in the embodiment of the present invention.

FIG. 4 is an explanatory view showing a measurement result of a friction coefficient in the example of the present invention.

FIG. 5 is an explanatory diagram showing an evaluation example of a friction coefficient measurement result in the example of the present invention.

FIG. 6 is an explanatory diagram showing an evaluation example of a wear amount measurement result in the example of the present invention.

FIG. 7 is a schematic side sectional view showing a general configuration example of a continuous casting apparatus for steel to which the present invention can be applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Block fixing device 19 (rotary cylinder) heating device 2 Base plate 20 Adhered matter 3 Linear guide 21 Brush roll 4 Base plate 22 Cylinder 5 Prop 23 (Brush roll)
Driving device 6 Linear guide 24 Computing device 7 Water cooling box 25 (Heating device) Control device 8 Microscope with built-in camera 26 (Servo motor) Control device 9 Cylinder 27 Glass material 10a, 10b Load cell 27p Melt (Molten glass material) 11 Block 28 (Melting furnace) heating device 12 Guide pipe 29 Melting furnace 13 Through hole 30 Inlet 14 Observation window 31 Injection tube 15 Heating rotation device 32 (Injection tube) heating device 16 Rotating cylinder 33 Thermometer 17 Rotating shaft 34 (Cylinder )
Control device 18 Servo motor 35 Data processing device 36 Image processing device 37 Cylinder

Claims (7)

[Claims] In a friction / wear test method in which two objects are brought into rotary contact, one of the objects is a heated rotary cylinder and the other is a block, and the outer surface of the rotary cylinder and a contact contact surface of the block. A friction / wear test method, characterized in that a friction / wear test is performed by injecting a melt and applying an arbitrary vibration condition by controlling a rotation speed waveform of a rotating cylinder. 2. A heating / rotating device for mounting and rotating a rotating cylinder while heating, a block fixing device for allowing a block to move forward and backward, a melting furnace having a heating device, and injection of a melt from the melting furnace. A flow control device for controlling the amount, an injection pipe connected to the injection port of the melting furnace, a rotating cylinder mounted on the heating rotary device, and between the block mounted on the block fixing device, from the melting furnace. A friction / wear test apparatus characterized in that a molten material can be injected through an injection pipe. 3. The friction / wear test device according to claim 2, wherein the rotation device of the heating rotation device can control the rotation speed to an arbitrary waveform. 4. A block fixing device is provided with a microscope with a built-in camera, and an observation hole is provided for enabling the back surface of the block fixed to the block fixing device to be observed with the microscope with a built-in camera. A through-hole is provided at the center where it comes into contact with, and a translucent heat-resistant material is embedded in this through-hole. 4. The friction / wear test apparatus according to claim 2, wherein the apparatus can be continuously observed during the test. 5. An illumination light projecting device is provided on the block fixing device side, and the illumination light is projected onto a contact surface between the outer peripheral surface of the rotating cylinder and the block through a translucent heat-resistant material embedded in the block. The friction / wear test device according to any one of claims 2 to 4, wherein the state of (1) can be continuously observed by a microscope with a built-in camera. 6. The friction / wear test apparatus according to claim 2, wherein the block mounting portion of the block fixing device can reciprocate up and down. 7. A brush roll is arranged to be rotatable by pressing against the outer peripheral surface of the rotating cylinder so that oxides and deposits on the surface of the rotating cylinder can be removed. The friction material according to any one of claims 1 to 6,
Wear test equipment.