CN219824272U - Heat treatment salt bath quenching device - Google Patents
Heat treatment salt bath quenching device Download PDFInfo
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- CN219824272U CN219824272U CN202321397417.7U CN202321397417U CN219824272U CN 219824272 U CN219824272 U CN 219824272U CN 202321397417 U CN202321397417 U CN 202321397417U CN 219824272 U CN219824272 U CN 219824272U
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- 238000010791 quenching Methods 0.000 title claims abstract description 59
- 230000000171 quenching effect Effects 0.000 title claims abstract description 58
- 150000003839 salts Chemical class 0.000 title claims abstract description 56
- 238000010438 heat treatment Methods 0.000 title claims abstract description 37
- 239000011449 brick Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 11
- 239000012266 salt solution Substances 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 3
- 239000010962 carbon steel Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
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- Furnace Details (AREA)
Abstract
The utility model discloses a heat treatment salt bath quenching device, which comprises a furnace body and a quenching furnace chamber arranged in the center of the furnace body, wherein a plurality of groups of electrodes uniformly distributed around the side wall surface of the quenching furnace chamber are inserted into the upper end of the furnace body, and binding posts are arranged at the top of the electrodes; a W-shaped starting electrode is inserted into the quenching hearth, and molten salt liquid is filled between the starting electrode and the inner wall of the quenching hearth; a slag hole is arranged at the bottom of the furnace body, and a flashboard is arranged between the slag hole and the furnace body; the electrode is of a hexahedral structure; according to the utility model, the main electrode is embedded in the refractory brick, the electrode extends out of the cavity through the binding post, the refractory brick is arranged between the quenching hearth and the furnace body wall to tightly attach five surfaces of the main electrode, and only one surface close to the quenching hearth is exposed; the main electrode is forged by carbon steel, and is distributed among refractory bricks of the hearth in a 40-degree isosceles triangle, so that uniform heating is realized, heating time is shortened, heating efficiency is improved, and energy conservation and consumption reduction of electric energy are realized.
Description
Technical Field
The utility model relates to the technical field of heat treatment, in particular to a heat treatment salt bath quenching device.
Background
Salt bath quenching is a quenching method in which a workpiece is immersed in a molten salt solution as a heating medium and heated. In the salt bath quenching heating technology, a common equipment electrode salt bath furnace introduces low-voltage (5.5-36V) high-current alternating current into the furnace through a metal electrode, and the current flows through salt liquid to generate heat, so that the salt liquid is a heating body and a medium for heating a workpiece. The magnetic field can make the salt solution turn circularly, which is beneficial to the temperature uniformity of the salt solution and can improve the heating speed of the workpiece.
The electrode salt bath furnace consists of electrodes, refractory lining, sealed metal furnace tank, heat insulating layer and furnace shell and is powered by special transformer. Because the solid salt is not conductive, power is firstly transmitted to the starting electrode when the furnace is opened, a part of salt is firstly melted by the resistance heating of the starting electrode, and then the main electrode is connected to enable current to pass through molten salt to heat. The main electrode has two structural forms of insertion type and embedded type. An insert electrode: the electrode is inserted into the furnace from the furnace mouth, and the electrode has simple structure and convenient assembly and disassembly; buried electrode: the electrodes are buried in salt, do not contact air, and have long service life. The furnace volume utilization coefficient of the electrode is high, but the electrode is difficult to disassemble. Both electrodes can be forged from carbon steel or heat resistant steel, or can be cast. The conventional salt bath furnace consists of tubular electric heating elements, metal tanks, stirrers, heat insulation layers and a furnace shell. The element heats up to melt the salt after being energized. This furnace is also called nitrate furnace because it is used for nitrate. The working temperature of the nitrate is not more than 550 ℃, and the nitrate decomposition is aggravated when the temperature exceeds the limit, so that accidents occur, and an overtemperature alarm device is required to be arranged. If the nitrate is changed into caustic soda or caustic potash, the furnace becomes an alkali bath furnace, and the furnace is suitable for bright quenching of steel.
The current density in the salt bath furnace is uneven due to unreasonable electrode design and arrangement of the existing salt bath quenching heating device; the structure is complex, the original is more, faults are easy to occur, the energy consumption is high, the electric energy use efficiency is low, the electrode is damaged too fast, and the service life is low; and the salt bath furnace has large power loss and uneven furnace temperature. The salt bath furnace adopts the uniformly distributed electrodes, has high heating speed and uniform temperature, can prevent the oxidation and the decarburization of the workpiece, improves the surface quality of the workpiece, and is the best equipment for quenching or normalizing the workpiece.
Disclosure of Invention
The utility model aims to provide a heat treatment salt bath quenching device, which aims to solve the problems that the existing salt bath quenching heating device is complex in structure, more in elements, easy to fail, uneven in heating and low in electrode use efficiency.
In order to solve the technical problems, the utility model provides the following technical scheme:
the heat treatment salt bath quenching device comprises a furnace body and a quenching hearth arranged in the center of the furnace body, wherein the outer wall of the furnace body is provided with a heat insulation material, and refractory bricks are arranged between the inner wall of the furnace body and the quenching hearth; the upper end of the furnace body is inserted with a plurality of groups of electrodes uniformly distributed around the side wall surface of the quenching furnace chamber, and the top of the electrodes is provided with binding posts; a W-shaped starting electrode is inserted into the quenching furnace chamber, and molten salt solution is filled between the starting electrode and the inner wall of the quenching furnace chamber;
the bottom of the furnace body is provided with a slag outlet, and a flashboard is arranged between the slag outlet and the furnace body; the electrode is of a hexahedral structure, the inner side wall surface of the electrode is contacted with molten salt liquid in the quenching hearth, and the rest wall surfaces are respectively and tightly attached to refractory bricks; the electrodes are distributed in an isosceles triangle around the quenching hearth, and each wall surface of the quenching hearth is in the temperature transmission range of the electrodes.
Preferably, the molten salt solution temperature is 500-1300 ℃.
Preferably, the number of the electrodes is 3.
The working process of the utility model comprises the following steps:
according to the utility model, molten salt liquid is used as a heating medium, because solid salt is not conductive, power is firstly transmitted to a starting electrode when a furnace is opened, the solid salt is firstly melted by utilizing resistance heating of the starting electrode, then a main electrode is connected to enable current to work through molten salt heating, and a workpiece is immersed into the molten salt liquid for heating; during production, cleaning the inner cavity of the furnace body, filling a heat-insulating material into the inner wall cavity of the furnace body, and building the forged three main electrodes in the furnace body in a 40-DEG isosceles triangle by using refractory bricks; inserting a starting electrode into a quenching hearth, adding a certain amount of industrial salt into the hearth, starting a starting motor to start heating the industrial salt until the industrial salt is melted to form molten salt liquid, taking out the starting electrode, starting a main electrode to continuously heat the molten salt liquid to keep the constant temperature, putting a workpiece to be quenched into the molten salt liquid for quenching, opening a flashboard after quenching is finished, and emptying the residual salt liquid and quenching slag.
The beneficial effects of the utility model are as follows:
according to the utility model, the main electrode is embedded in the refractory brick, the electrode extends out of the cavity through the binding post, the refractory brick is arranged between the quenching hearth and the furnace body wall to tightly attach five surfaces of the main electrode, and only one surface close to the quenching hearth is exposed; the main electrode is forged by carbon steel, and is distributed among refractory bricks of the hearth in a 40-degree isosceles triangle, so that uniform heating is realized, heating time is shortened, heating efficiency is improved, and energy conservation and consumption reduction of electric energy are realized.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present utility model;
FIG. 2 is a top view of the present utility model;
FIG. 3 is a top cross-sectional view of the present utility model;
FIG. 4 is a side cross-sectional view of an electrode of the present utility model;
FIG. 5 is a side cross-sectional view of a starting electrode of the present utility model;
in the figure: 1-furnace body, 2-heat insulation material, 3-refractory brick, 4-quenching furnace chamber, 5-electrode, 6-binding post, 7-molten salt solution, 8-starting electrode, 9-slag outlet and 10-flashboard.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
The heat treatment salt bath quenching device shown in the figures 1-5 comprises a furnace body 1 and a quenching hearth 4 arranged in the center of the furnace body 1, wherein a W-shaped starting electrode 8 is inserted into the quenching hearth 4, and 500-1300 ℃ molten salt 7 is filled between the starting electrode 8 and the inner wall of the quenching hearth 4; the outer wall of the furnace body 1 is provided with a heat insulation material 2, and a refractory brick 3 is arranged between the inner wall of the furnace body 1 and the quenching hearth 4; 3 groups of electrodes 5 uniformly distributed around the side wall surface of the quenching hearth 4 are inserted into the upper end of the furnace body 1, the electrodes 5 are of hexahedral structure, the inner side wall surface of the electrodes 5 is contacted with molten salt 7 in the quenching hearth 4, and the rest wall surfaces are respectively and tightly attached to the refractory bricks 3; the three groups of electrodes 5 are distributed in an isosceles triangle around the quenching hearth 4, and each wall surface of the quenching hearth 4 is in the temperature transmission range of the electrodes 5; in addition, the top of the electrode 5 is provided with a binding post 6;
the bottom of the furnace body 1 is provided with a slag hole 9, and a flashboard 10 is arranged between the slag hole 9 and the furnace body 1.
The working process of the utility model is as follows:
according to the utility model, molten salt liquid is used as a heating medium, because solid salt is not conductive, power is firstly transmitted to the starting electrode 8 when a furnace is opened, the solid salt is firstly melted by utilizing the resistance heating of the starting electrode 8, then the main electrode 5 is connected to enable current to work by heating the molten salt liquid 7, and a workpiece is immersed into the molten salt liquid 7 for heating; during production, the inner cavity of the furnace body 1 is cleaned, a heat insulation material 2 is filled into the inner wall cavity of the furnace body 1, and three forged electrodes 5 are built in the furnace body 1 in a 40-degree isosceles triangle by using refractory bricks 3; inserting a starting electrode 8 into the quenching hearth 4, adding a certain amount of industrial salt into the quenching hearth 4, opening the starting electrode 8 to start heating the industrial salt until the industrial salt is melted to form molten salt 7, taking out the starting electrode 8, starting three groups of electrodes 5 to continuously heat the molten salt 7 to keep the constant temperature, putting a workpiece to be quenched into the molten salt 7 for quenching, opening a flashboard 10 after quenching is finished, and emptying the rest molten salt 7 and quenching slag.
The foregoing is merely a preferred example of the present utility model, and it should be noted that other equivalent variations and modifications can be made as well known in the mechanical arts by those skilled in the art, given the technical teaching provided herein, and should also be considered as the scope of the present utility model.
Claims (3)
1. A heat treatment salt bath quenching device is characterized in that: including furnace body (1) and quenching furnace (4) of setting in furnace body (1) center, its characterized in that: the outer wall of the furnace body (1) is provided with a heat insulation material (2), and a refractory brick (3) is arranged between the inner wall of the furnace body (1) and the quenching hearth (4); the upper end of the furnace body (1) is inserted with a plurality of groups of electrodes (5) which are uniformly distributed around the side wall surface of the quenching furnace chamber (4), and binding posts (6) are arranged at the top of the electrodes (5);
a W-shaped starting electrode (8) is inserted into the quenching hearth (4), and molten salt liquid (7) is filled between the starting electrode (8) and the inner wall of the quenching hearth (4);
a slag hole (9) is formed in the bottom of the furnace body (1), and a flashboard (10) is arranged between the slag hole (9) and the furnace body (1);
the electrode (5) is of a hexahedral structure, the inner side wall surface of the electrode (5) is in contact with molten salt solution (7) in the quenching hearth (4), and the rest wall surfaces are respectively and tightly attached to the refractory bricks (3); the electrodes (5) are distributed in an isosceles triangle around the quenching hearth (4), and each wall surface of the quenching hearth (4) is in the temperature transmission range of the electrodes (5).
2. A heat treatment salt bath quenching apparatus as claimed in claim 1 wherein: the temperature of the molten salt solution (7) is 500-1300 ℃.
3. A heat treatment salt bath quenching apparatus as claimed in claim 1 or claim 2 wherein: the number of the electrodes (5) is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321397417.7U CN219824272U (en) | 2023-06-04 | 2023-06-04 | Heat treatment salt bath quenching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321397417.7U CN219824272U (en) | 2023-06-04 | 2023-06-04 | Heat treatment salt bath quenching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219824272U true CN219824272U (en) | 2023-10-13 |
Family
ID=88285406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321397417.7U Active CN219824272U (en) | 2023-06-04 | 2023-06-04 | Heat treatment salt bath quenching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219824272U (en) |
-
2023
- 2023-06-04 CN CN202321397417.7U patent/CN219824272U/en active Active
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