CN216107114U - Quick heat treatment device for rail steel - Google Patents
Quick heat treatment device for rail steel Download PDFInfo
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- CN216107114U CN216107114U CN202122356163.1U CN202122356163U CN216107114U CN 216107114 U CN216107114 U CN 216107114U CN 202122356163 U CN202122356163 U CN 202122356163U CN 216107114 U CN216107114 U CN 216107114U
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Abstract
The utility model provides a rapid heat treatment device for rail steel, and belongs to the technical field of experimental devices. The rapid heat treatment device for the steel rail comprises a sample base arranged at the upper end of a table board, a medium pipe arranged at the lower end of the table board and a fixed adjusting device arranged at the lower end of the table board; the upper end surface of the sample base is provided with a heat insulation ring for loading a sample; the medium pipe penetrates through the table top and is communicated with the heat insulation ring, and the position, close to the lower end of the table top, of the medium pipe is communicated with a nozzle; the fixed adjusting device comprises a nozzle fixing plate, one end of the nozzle fixing plate is connected with the nozzle, the other end of the nozzle fixing plate is connected with the medium pipe, and the nozzle fixing plate is connected with the table board through an adjusting screw. The rapid heat treatment device for the steel rail provided by the utility model can improve the research and development efficiency of a new product of the heat-treated steel rail, directly simulate and analyze the influence of the heat treatment process of the steel rail on the performance, and provide reference for field industrial debugging through laboratory research.
Description
Technical Field
The utility model relates to the technical field of experimental devices, in particular to a rapid heat treatment device for rail steel.
Background
When the steel rail needs heat treatment for steel grade development due to complex section, rolling and sample preparation are needed to obtain the section size and a certain compression ratio, and the development progress of the heat-treated steel rail is seriously influenced. In order to simplify the development process, a rapid thermal processing apparatus was designed in conjunction with the laboratory rolling conditions, as shown in fig. 1. The heat treatment process of the steel rail is a rapid quenching process, and aims to obtain a fine lamellar pearlite structure so as to improve the strength index of the steel rail. The development of the heat-treated steel rail relates to two processes of rolling and heat treatment of the steel rail, the rolling pass and the rolling schedule of the steel rail with the same section are basically relatively fixed, and the difficulty lies in the research on the heat treatment process. In order to improve the research and development efficiency in the research and development process of new products, the device can carry out high-approximation heat treatment tests according to production conditions, is convenient for exploring and analyzing the corresponding relation between process parameters and material performance, and promotes the promotion of steel grade development work.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model aims to provide a heat treatment device for researching heat treatment process parameters, mechanical properties and material characteristics of rail steel, and therefore, the utility model provides a rapid heat treatment device for rail steel, which can improve the research and development efficiency of new products for heat treatment of rail steel, directly simulate and analyze the influence of the heat treatment process of the rail steel on the performance, and provide reference for field industrial debugging through laboratory research.
In order to achieve the purpose, the utility model provides the following technical scheme:
the rapid heat treatment device for the steel rail comprises a sample base arranged at the upper end of a table top, a medium pipe arranged at the lower end of the table top and a fixed adjusting device arranged at the lower end of the table top;
the upper end surface of the sample base is provided with a heat insulation ring for loading a sample;
the medium pipe penetrates through the table top and is communicated with the heat insulation ring, and a nozzle is communicated with the position, close to the lower end of the table top, of the medium pipe;
the fixed adjusting device comprises a nozzle fixing plate, one end of the nozzle fixing plate is connected with the nozzle, the other end of the nozzle fixing plate is connected with the medium pipe, and the nozzle fixing plate is connected with the table board through an adjusting screw.
Preferably, the top end of the sample is provided with a hole, and a temperature measuring device is arranged in the hole.
Preferably, the temperature measuring device is a thermocouple.
Preferably, the diameter of the test specimen is 15 to 35 mm.
Compared with the prior art, the utility model has the following beneficial effects;
1. the rapid heat treatment device for the steel rail provided by the utility model can improve the research and development efficiency of a new product of the heat-treated steel rail, directly simulate and analyze the influence of the heat treatment process of the steel rail on the performance, and provide reference for field industrial debugging through laboratory research.
2. The rapid heat treatment device for the steel rail provided by the utility model is simple in composition and construction, is mainly used for researching the corresponding relation between the steel rail heat treatment process and the mechanical property, can measure the temperature of different positions in a sample by a thermocouple-embedding method, can cut the sample, analyzes the change gradient of internal hardness, and researches the hardenability and the correspondence between the hardening layer depth and the heat treatment process. The sizes of samples with different diameters are designed according to the actual condition of the steel rail, and the influence of different air pressures and different quenching media on the steel structure and the hardness performance of the steel rail is researched through controlling the pressure by a pressure regulating valve.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of thermocouple temperature measurement;
in the figure, 1, a sample base, 2, a heat insulation ring, 3, a sample, 4, an adjusting screw, 5, a nozzle, 6, a nozzle fixing plate, 7, a medium pipe, 8, a table board and 9, a thermocouple are arranged.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, the utility model provides a rail steel rapid heat treatment device, which comprises a sample base 1 arranged at the upper end of a table top 8, a medium 7 arranged at the lower end of the table top 8 and a fixed adjusting device arranged at the lower end of the table top 9;
the upper end surface of the sample base 1 is provided with a heat insulation ring 2 for loading a sample 3;
the medium pipe 7 penetrates through the table top 8 and is communicated with the heat insulation ring 2, and a nozzle 5 is communicated at the position, close to the lower end of the table top 8, of the medium pipe 7;
the fixed adjusting device comprises a nozzle fixing plate 6, one end of the nozzle fixing plate is connected with the nozzle 5, the other end of the nozzle fixing plate is connected with the medium pipe 7, and the nozzle fixing plate 5 is connected with the table top 8 through an adjusting screw 4.
In the structure of the utility model, the adjusting screw 4 is used for adjusting the distance between the nozzle 5 and the bottom surface of the sample 3, and various cooling media can be filled in the medium pipe 7 according to the requirement to cool the sample 3 for a plurality of times.
In the utility model, the top end of the sample 3 is provided with a hole, and a temperature measuring device is arranged in the hole.
In the present invention, the temperature measuring device is a thermocouple 9.
In the present invention, the diameter of the sample 3 is 15 to 35 mm.
In the above-described configuration of the present invention, the sample 3 may be punched and embedded in a temperature probe for measuring temperatures at different positions from the surface according to the test requirements, and is preferably a thermocouple 9. After the non-porous sample is cut, the change situation of the hardness extending from the surface to the interior of the sample can be measured, so that the heat treatment performance of the rail steel and the heat treatment process meeting the use requirement can be known.
In the utility model, the diameter range of the sample 3 can be selected to carry out heat treatment process simulation according to the contact width of the wheel rail, the diameter range of the sample 3 can be 15-35mm, and only the heat insulation ring 2 needs to be adjusted. The lower surface of the sample 3 is flush with the lower surface of the heat insulation ring 2, so that the gap between the sample 3 and the heat insulation ring 2 is reduced as much as possible, and the sample 3 is prevented from being cooled and radiated and diffused from the cylindrical surface of the sample 3.
The present invention will be described in further detail with reference to specific examples.
The assembling process comprises the following steps: the sample base 1 is a supporting device for a sample 3, an insulating ring 2 is arranged on the sample base, and the heated sample 3 is placed in the insulating ring 2 for quenching and air cooling. The nozzles 5 are moved to a pre-controlled position by adjusting screws 4 before air cooling, and the nozzle fixing plate 6 with the recorded spacing of the nozzles 5 is connected with the nozzles 5 at one end and connected with the medium pipe 7 at the other end. The table top 8 is connected with the sample base 1, and the lower part is connected with the adjusting screw 4.
The use process comprises the following steps: the dimensions of the section of the rail to be investigated are determined, for example in the case of a 60kg/m rail, and the diameter of sample 3 is determined to be 30 mm. Adjusting the distance between the nozzle 5 and the lower surface of the sample, heating the sample 3 to the complete austenitizing temperature, preserving the temperature for a period of time, quickly putting the sample 3 out of the heating furnace into the heat insulation ring 2, measuring the surface temperature of the sample 3, and introducing a quenching medium for quick cooling when the surface temperature of the sample 3 is reduced to the temperature required by quenching. Before the sample 3 begins to be cooled, the cooling surface of the sample 3 is flush with the surface of the sample base 1 after the sample 3 is arranged in the heat insulation ring 2, and meanwhile, the gap between the sample 3 and the heat insulation ring 2 is controlled, so that one heat exchange surface of the sample 3 is the bottom of the sample as far as possible. After the sample 3 is subjected to heat treatment, the surface decarburized layer of the sample 3 is removed, and then hardness test is performed to measure the depth of the hardened layer. Meanwhile, holes can be drilled in the sample 3, temperature drop curves of the sample 3 at different positions are obtained in a mode of embedding the thermocouple 9, the temperature change conditions of the surface of the sample 3 and different positions in the sample are analyzed, and then the relation between the internal cooling speed of the sample and the material structure is analyzed.
The device can be used for flexibly researching the corresponding relation between the heat treatment process parameters of the steel rail material and the material performance, is flexible and simple to operate, is diversified in combination and has strong universality.
The above are merely preferred embodiments of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (4)
1. The rapid heat treatment device for the steel rail is characterized by comprising a sample base arranged at the upper end of a table top, a medium pipe arranged at the lower end of the table top and a fixed adjusting device arranged at the lower end of the table top;
the upper end surface of the sample base is provided with a heat insulation ring for loading a sample;
the medium pipe penetrates through the table top and is communicated with the heat insulation ring, and a nozzle is communicated with the position, close to the lower end of the table top, of the medium pipe;
the fixed adjusting device comprises a nozzle fixing plate, one end of the nozzle fixing plate is connected with the nozzle, the other end of the nozzle fixing plate is connected with the medium pipe, and the nozzle fixing plate is connected with the table board through an adjusting screw.
2. The rapid rail steel heat treatment device according to claim 1, wherein a hole is formed at the top end of the sample, and a temperature measuring device is arranged in the hole.
3. The rapid rail steel heat treatment apparatus according to claim 2, wherein the temperature measuring device is a thermocouple.
4. The rail steel rapid thermal processing apparatus according to any one of claims 1 to 3, wherein the diameter of the test piece is 15 to 35 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122356163.1U CN216107114U (en) | 2021-09-28 | 2021-09-28 | Quick heat treatment device for rail steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122356163.1U CN216107114U (en) | 2021-09-28 | 2021-09-28 | Quick heat treatment device for rail steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216107114U true CN216107114U (en) | 2022-03-22 |
Family
ID=80689421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122356163.1U Active CN216107114U (en) | 2021-09-28 | 2021-09-28 | Quick heat treatment device for rail steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216107114U (en) |
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2021
- 2021-09-28 CN CN202122356163.1U patent/CN216107114U/en active Active
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