TWI557232B - Rapid heat transfer steel heat treatment system - Google Patents

Description

Rapid heat transfer steel heat treatment system

The invention relates to a rapid heat conduction steel heat treatment system, in particular to an isothermal heat treatment technology capable of accurately controlling a heat treatment process temperature to a desired preset time-temperature transformation (or TTT).

According to the conventional knowledge of changing the heating temperature and cooling rate of the steel, a variety of different mechanical properties can be obtained. The so-called "heat treatment" means that when the steel is heated to a critical temperature range, it is cooled to a normal temperature by using different cooling rates. In the meantime, the steel is subjected to a rapid cooling operation process (such as quenching, Hardening) to obtain high hardness and high strength mechanical properties of the steel. Conversely, the slow cooling operation process (such as annealing annealing), the mechanical properties will be completely opposite to the aforementioned process. Specifically, the quenching heat treatment means that after the steel material is heated to a critical temperature and maintained for a suitable period of time, the steel material is rapidly cooled to prevent the Ar1 metamorphosis (ie, the ferrite transformation), thereby obtaining a high-hardness granulated iron structure. Although the structural strength of the steel after quenching becomes large and the hardness becomes high, the quenched steel is not practical because the steel must be tempered to achieve the desired mechanical properties of the steel, thereby enhancing the application of the steel.

Further, when the quenched steel material is heated to a temperature below the transformation point, the stress inside the steel material can be removed and the hardness of the steel material can be adjusted to obtain appropriate toughness of the steel material. The process is called tempering heat treatment. The specific process of general tempering heat treatment is to reheat the quenched steel workpiece to a temperature lower than the metamorphic point, and keep the temperature for a period of time, then cool it by air or water, oil, etc., so that it can be eliminated. In addition to the internal stress of the workpiece, the structural stability of the steel can be improved, and the geometrical dimensions and mechanical properties of the steel can be kept stable.

Furthermore, the quenching process of conventional steel wire or steel strip and other workpieces is mostly achieved by lead bath quenching, steam quenching, oil quenching, and steel mold water quenching. Among them, the lead bath quenching process will cause serious pollution to the surrounding environment, and even cause lead poisoning due to inadvertent inhalation, which will cause serious harm to human health. As for the waste oil produced by the oil quenching process, the surrounding environment is also polluted, and the process time required for the oil quenching process is long, so that the production cost cannot be effectively reduced; it is difficult to obtain the lower Bainite by oil quenching. The lower bainite has an excellent toughness fit. In addition, during the quenching process, the steam quenching process will continuously generate high-temperature steam. The high-temperature steam will not only raise the temperature of the nearby environment, but also cause the human body to be burnt due to accidental contact. Steam quenching also results in higher production costs due to the longer process time required for the process. In view of this, how to develop a steel heat treatment technology that meets the requirements of environmental protection (lead-free, oil-free, high-temperature steam), lower cost, shorter process time, and better quality and performance, has become relevant. Technical issues that industry students are eager to solve.

The art of heat treatment in the conventional patent art includes the invention of the Republic of China No. I316552 "Specially used for annealing annealed steel sheets for annealing steel sheets and bundled steel bars", and the Republic of China Invention Publication No. 201408783 "Continuous annealing furnace for steel strips, Continuous annealing method, continuous hot-dip galvanizing equipment and manufacturing method of hot-dip galvanized steel strip; and Republic of China new type M392332 The furnace auxiliary heating device is shown in patents. The cooling treatment of the No. I316552 patent is carried out in a protective gas of a furnace, and the protective gas system is extracted from the protective cover through a radial blower, and is cooled by a heat exchanger before being returned to the protective cover. . The publication No. 201408783 is mainly a low dew point environment which can stably obtain the problem of picking up defects or damage of the furnace wall to prevent the oxidative elements such as Si and Mn in the steel from being increased on the surface of the steel strip during annealing. It is concentrated to form an oxide of an oxidizable element such as Si or Mn. The patent No. M392332 mainly reduces the pollution by burning exhaust gas, thereby achieving the effect of energy reuse. The features and functions of the prior art patents are different from the present invention, and the prior patents do not have the functional mechanism of temperature and temperature control medium feedback monitoring, etc., so that the patents are more difficult to achieve tempering heat treatment. More precise temperature monitoring is required, which makes the steel less able to adjust to the required mechanical properties of the steel, thus limiting the application level of the steel workpiece.

The reason is that the creator of the present invention believes that the above-mentioned conventional structure is indeed not perfect, and there is still a need for further improvement. Therefore, the creator of the present invention has continuously developed a set to improve the above-mentioned conventional structural defects. The invention.

The first object of the present invention is to provide a rapid heat conduction steel heat treatment system which can replace the traditional lead bath quenching, steam quenching, oil quenching and steel mold water quenching and quenching processes, mainly by rapid heat conduction and cooling of working fluid temperature control. The function can be built in addition to the fast heat transfer effect, and the steel (such as steel plate, steel wire, steel strip) can be precisely adjusted to the required mechanical properties after heat treatment, so it has environmental protection standards (lead-free, oil-free and no high temperature). Water vapor, etc., lower cost, shorter working hours, and superior strength and performance of the tough mix. The technical means adopted to achieve the first object of the present invention include a thermally conductive metal enclosure and a cold Heat exchange member and cooling working fluid circulation device. The heat conductive metal enclosure surrounds a heat treatment gate having a heat treatment chamber, and the heat treatment chamber is available for heat input to the steel for cooling. The heat introduction surface of the thermal conductive metal enclosure is in contact with the steel material to absorb the heat of the steel material and lead to the heat export surface of the thermal conductive metal enclosure. The cold heat exchange member includes a heat absorbing surface in contact with the heat exporting surface and a cooling working fluid passage for absorbing heat of the steel material to the heat exporting surface to the inside of the cold heat exchange member. The cooling working fluid circulation conveying device is configured to circulate the cooling working fluid to the cooling working fluid passage to cool the working fluid to exchange heat of the heat of the steel material absorbed by the cold heat exchange member.

A second object of the present invention is to provide an isothermal transformation, or austempering, of a steel heat treatment system (TTT) that maintains the heat treatment temperature within a desired temperature range. Mainly through the establishment of a feedback mechanism such as temperature and cooling working fluid flow rate, the heat treatment temperature of the steel workpiece can be controlled within the required temperature range during the heat treatment. The technical means adopted for achieving the second object of the present invention include a thermal conductive metal enclosure, a cold heat exchange member, and a cooling working fluid circulation conveying device. The heat conductive metal enclosure surrounds a heat treatment gate having a heat treatment chamber, and the heat treatment chamber is available for heat input to the steel for cooling. The heat introduction surface of the thermal conductive metal enclosure is in contact with the steel material to absorb the heat of the steel material and lead to the heat export surface of the thermal conductive metal enclosure. The cold heat exchange member includes a heat absorbing surface in contact with the heat exporting surface and a cooling working fluid passage for absorbing heat of the steel material to the heat exporting surface to the inside of the cold heat exchange member. The cooling working fluid circulation conveying device is configured to circulate the cooling working fluid to the cooling working fluid passage to cool the working fluid to exchange heat of the heat of the steel material absorbed by the cold heat exchange member. The cooling working fluid circulation conveying device comprises at least one temperature detecting module, a cooling working fluid conveying module, a control module and a conveying pipeline, wherein the temperature detecting module is configured to sense the steel material in the heat treatment a temperature sensing signal is generated by the temperature state of the chamber; the cooling working fluid delivery module is configured to perform the cooling operation The fluid is circulated and transported in the conveying pipeline and the cooling working fluid passage; the temperature control module is configured to control the temperature of the cooling working fluid; the control module interprets and processes the temperature sensing signal to generate a temperature value, and at least Comparing a preset temperature value, when the temperature value is higher than the preset temperature value, driving the cooling working fluid delivery module to increase a cooling working fluid flow rate, when the temperature value is lower than the preset temperature value, The cooling working fluid delivery module is driven to reduce the cooling working fluid flow.

1‧‧‧Steel workpiece

10‧‧‧ Heat treatment gateway

11‧‧‧ Heat treatment chamber

12‧‧‧ Entrance

13‧‧‧Export

20‧‧‧Hot conductive metal enclosure

21‧‧‧Hot export surface

22‧‧‧Hot introduction surface

30‧‧‧Cold and heat exchange parts

31‧‧‧Heat absorption surface

32‧‧‧Cooling working fluid channel

40‧‧‧Cooling working fluid circulation conveyor

41‧‧‧Temperature detection module

42‧‧‧Cooling working fluid delivery module

43‧‧‧temperature control module

430‧‧‧heating parts

431‧‧‧cooling parts

432‧‧‧First switching valve

433‧‧‧Second switching valve

434‧‧‧ tee

44‧‧‧Control Module

45‧‧‧Transportation line

46‧‧‧Flow sensing module

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the implementation of a first embodiment of the present invention.

Figure 2 is a schematic illustration of the implementation of a second embodiment of the present invention.

Figure 3 is a schematic view showing the implementation of the third embodiment of the present invention.

Figure 4 is a schematic view showing the implementation of the steel workpiece of the present invention entering the heat treatment chamber.

Figure 5 is a schematic view showing the implementation of the steel workpiece of the present invention placed in a heat treatment chamber.

Figure 6 is a schematic cross-sectional view showing the cold heat exchange member of the present invention.

Referring to FIG. 1 and FIG. 4-6, in order to achieve the first embodiment of the first object of the present invention, the heat treatment gate 10, the thermal conductive metal enclosure 20, the cold heat exchange member 30, and the cooling working fluid are included. Technical features such as the endless conveying device 40. The heat treatment gate 10 includes a heat treatment chamber 11 and inlets 12 and outlets 13 respectively located at both ends of the heat treatment chamber 11. The inlet 12 allows the steel workpiece 1 to be input to the heat treatment chamber 11 for heat treatment for cooling. The outlet 13 allows the steel workpiece 1 to be output from the thermal processing chamber 11. The heat conductive metal enclosure 20 surrounds the heat treatment gate 10, and the heat conductive metal enclosure 20 includes two heat extraction surfaces 21 on the outer circumferential surface, and two a heat introduction surface 22 on the inner circumferential surface, an inner circumferential surface of the heat conductive metal enclosure 20 and a heat introduction surface 22 forming a wall surface of the heat treatment chamber 11 of the heat treatment gate 10; and the heat introduction surface 22 is a steel workpiece 1 The contact is made to absorb the heat of the steel workpiece 1 and is conducted to the heat-extracting surface 21 via the inside of the thermally conductive metal enclosure 20. Each of the cold heat exchange members 30 is provided with a heat absorption surface 31 and a cooling working fluid passage 32. The heat absorption surface 31 is in contact with the heat extraction surface 21 to absorb the heat of the steel workpiece 1 coming to the heat extraction surface 21 and is conducted to the cold heat exchange member. 30 internal. The cooling working fluid circulation conveying device 40 is configured to circulate a cooling working fluid (such as water; or R-134a tetrafluoroethane, and a refrigerant such as Isobutane isobutane) to the cooling working fluid passage 32 to cool the working fluid to the cold heat exchange. The heat of the steel workpiece 1 absorbed by the member 30 is exchanged for heat and cold, thereby further cooling the heat exchange member 30.

Specifically, the thermal conductive metal enclosure 20 has two plate-like shapes and is vertically symmetrical. The length and width of each of the thermal conductive metal enclosures 20 are respectively greater than three times the thickness, and the two thermal conductive metal enclosures 20 are The heat treatment gates 10 are formed at a distance from each other to form the heat treatment gates 10, and the opposite surfaces of the two heat conduction metal enclosures 20 respectively form the heat introduction surface 22, and the heat introduction surfaces 22 of the two heat conduction metal enclosures 20 are parallel to each other. The heat conductive metal enclosure 20 has a heat-extracting surface 21 to contact the heat absorbing surface 31 of the cold heat exchange member 30, and the heat conductive metal enclosure 20 is made of steel. As for the two cold heat exchange members 30, they are also plate-shaped and vertically symmetrical, and the two cold heat exchange members 30 are made of aluminum.

Referring to FIG. 2 and FIG. 4-6, in order to achieve the second embodiment of the second object of the present invention, the heat treatment gate 10, the heat conductive metal enclosure 20, the cold heat exchange member 30, and the cooling working fluid are circulated and conveyed. Technical features such as device 40. The heat treatment gate 10 includes a heat treatment chamber 11 and inlets 12 and outlets 13 respectively located at both ends of the heat treatment chamber 11. The inlet 12 allows the steel workpiece 1 to be input to the heat treatment chamber 11 for heat treatment for cooling. The exit 13 The steel workpiece 1 can be output from the heat treatment chamber 11. The heat conductive metal enclosure 20 surrounds the heat treatment gate 10, and the heat conductive metal enclosure 20 includes two heat extraction surfaces 21 on the outer circumferential surface, and two heat introduction surfaces 22 on the inner circumferential surface. The inner circumferential surface of the body 20 and the heat introduction surface 22 form a wall surface of the heat treatment chamber 11 of the heat treatment gate 10; and the heat introduction surface 22 is in contact with the steel workpiece 1 to absorb heat of the steel workpiece 1 and to thermally guide the metal enclosure 20 is internally conducted to the heat export surface 21. Each of the cold heat exchange members 30 is provided with a heat absorption surface 31 and a cooling working fluid passage 32. The heat absorption surface 31 is in contact with the heat extraction surface 21 to absorb the heat of the steel workpiece 1 coming to the heat extraction surface 21 and is conducted to the cold heat exchange member. 30 internal. The cooling working fluid circulation conveying device 40 is configured to circulate a cooling working fluid (such as water or other kinds of refrigerant) to the cooling working fluid passage 32 to cool the working fluid to exchange heat and heat with the heat of the steel workpiece 1 absorbed by the cold heat exchange member 30. Further, the cold heat exchange member 30 is cooled. The cooling working fluid circulation conveying device 40 includes at least one temperature detecting module 41, a cooling working fluid conveying module 42, a cooling tower 431a, a control module 44, a conveying line 45, and a flow sensing module. Group 46.

The temperature detecting module 41 (such as a thermocouple) shown in FIG. 2 is disposed on the thermal conductive metal enclosure 20 for sensing the temperature state of the steel workpiece 1 in the thermal processing chamber 11 to generate a temperature sensing signal. The delivery line 45 is coupled to the input and output ends of the cooling working fluid passage 32. The cooling working fluid delivery module 42 is configured to circulate the cooling working fluid in the delivery line 45 and the cooling working fluid channel 32. Cooling tower 431a is in communication with delivery line 45 for holding the cooling working fluid and reducing the temperature of the cooling working fluid. The control module 44 is configured to read and process the temperature sensing signal to generate a temperature value, and compare with the preset temperature value (the setting range is between 150 and 600 degrees Celsius), when the temperature value is higher than the preset temperature value. At the same time, the control module 44 drives the cooling working fluid delivery module 42 (which may include a water pump and a valve) to increase the flow of the cooling working fluid; When the temperature value is lower than the preset temperature value, the control module 44 drives the cooling working fluid delivery module 42 to reduce the flow rate of the cooling working fluid. In addition, the flow sensing module 46 is connected to the conveying pipeline 45 for sensing the flow rate of the cooling working fluid of the conveying pipeline 45 to generate a flow sensing signal, and sends it to the control module 44 for interpretation processing. As a reference for the control module 44 to control the flow rate of the cooling working fluid.

3 to 6, in order to achieve the third embodiment of the third object of the present invention, in addition to the overall technical features of the second embodiment, the cooling working fluid circulation device 40 further includes a Temperature control module 43. The temperature control module 43 can be heated or cooled by the control module 44 to cool or cool the cooling working fluid. The temperature control module 43 shown in FIG. 3 includes a heating component 430 and a cooling component 431. The temperature control module 43 can be selected by the control module 44 to heat the cooling working fluid by the heating component 430, or to cool the cooling working fluid by the cooling component 431. Specifically, the heating component 430 may be a heating device that heats the cooling working fluid (such as an electric heating element; or a heating system of the heat pump; but not limited thereto); the cooling component 431 may be a cooling device for cooling the working fluid. The cooling device (such as the cooling tower with the fan; or the cooling system of the heat pump; but not limited to this) can achieve the purpose of effectively and quickly controlling the temperature of the cooling working fluid.

Specifically, when the cooling working fluid flows out from the two output ends of the cooling working fluid passage 32 of the two cold heat exchange members 30, it is collected into a three-way pipe through the conveying pipe 45, and sequentially delivered to a first one. The switching valve 432, the heating component 430 or the cooling component 431, a second switching valve 433, and then the cooling working fluid delivery module 42 recirculates the cooling working fluid through the delivery line 45 to the cooling working fluid of the two cold heat exchange members 30. The two input ends of the channel 32, wherein the first switching valve 432 has an inlet and two outlets, and the second switching valve 433 has Two entrances and one exit. The first switching valve 432 and the second switching valve 433 can be synchronously opened or closed by the control module 44 to open or close the passage between the respective inlet and outlet; that is, the first switching valve 432 can select to cool the working fluid into the heating component. 430; or a cooling member 431; the second switching valve 433 may select to cool the working fluid from the heating member 430; or the cooling member 431 flows out to the cooling working fluid delivery module 42, whereupon, depending on the heat treatment temperature requirement The returning cooled working fluid is selected to enter the heating component 430; or the cooling component 431.

Furthermore, in a more specific application embodiment, the heat treatment structure of the present invention comprises a set of thermal conductive metal enclosures 20 (ie, a set of steel molds) and two cold heat exchange members 30 (ie, aluminum alloy modules with water cooled jackets). And a pair of cold heat exchange members 30 are heat-treated and cooled to cool the working fluid circulation device 40. During the heat treatment process, the steel workpiece 1 (such as steel plate, steel wire or steel strip) may be subjected to lower bainite quenching or martensite quenching, as shown in Fig. 1. The heat treatment structure of the present invention can be, but is not limited to, only pre-heat treatment for steel wire or steel strip, for example, it can be applied in industrial fields such as spring manufacturing and tape manufacturing. In addition, the heat treatment structure of the present invention can replace the traditional steel wire or Steel strip quenching technology process (such as lead bath quenching, steam quenching; oil quenching; steel quenching and other traditional quenching technology processes). Therefore, the heat treatment structure of the invention has the advantages of more environmentally friendly green (lead-free, oil-free, no high-temperature steam), lower cost, shorter process time, and superior strength and performance of the toughness. When the steel workpiece 1 (steel wire or steel strip) enters the heat treatment chamber 11 from a continuous quenching furnace (austenification temperature of about 850 ° C) through the heat treatment gate 10 inlet 12, the steel wire or steel strip will be in contact with On the inner wall of the heat treatment chamber 11, since the outer surface of the heat conductive metal enclosure 20 is covered with the cold heat exchange member 30 having the cooling working fluid passage 32, the steel workpiece 1 in the heat treatment chamber 11 can be subjected to heat exchange treatment, and further The temperature sensing module 41 (such as a thermocouple; but not limited thereto) is connected to the thermal conductive metal enclosure 20, so that the temperature sensing signal can be transmitted to the control module. In a microprocessor or computer of 44, the microprocessor or computer is compared with a preset temperature value, and when the temperature value is higher than a preset temperature value, the microprocessor or the computer drives the cooling working fluid through the driving circuit. The pump or valve of the delivery module 42 is used to increase the flow rate of the cooling working fluid delivered by the pump; or to increase the flow of the cooling working fluid through the valve; conversely, when the temperature is lower than the preset temperature, the microprocessor or the computer is lowered. The pump delivers cooling of the working fluid flow; or reduces the flow of the cooling working fluid through the valve to achieve the effect of monitoring and controlling the temperature of the thermally conductive metal enclosure 20 and the steel workpiece 1 . In addition, the preset temperature value can be set between 150 and 600 ° C. It can also be set according to the phase change rule of steel wire or steel strip, and the temperature accuracy can be set within the range of ± 5 ° C.

Further, the present invention is provided with a temperature detecting module 41 for the thermal conductive metal enclosure 20 to change the temperature sensing signal sensed at different times as the ΔT ₁ temperature difference of the steel workpiece 1 and then to cool the working fluid channel. A set of temperature detecting modules 41 are disposed adjacent to the input end and the output end of 32 to detect a temperature change (ie, ΔT ₂ temperature difference) between the input end and the output end of the cooling working fluid passage 32. Steel workpieces thermal change △ H 1 ₁ of the following formula (1): △ H ₁ = m ₁ (by mass) × s ₁ (specific heat) × △ T ₁ (temperature difference) (1)

The heat change of the cooling working fluid is as shown in the following formula (2): ΔH ₂ = m ₂ (mass) × s ₂ (specific heat) × ΔT ₂ (temperature difference) (2)

Theoretically, the heat change ΔH of the steel workpiece 1 can be regarded as equal to the heat change ΔH _{2 of the} cooling working fluid; that is, ΔH ₁ = ΔH ₂ , therefore, the present invention can be controlled by programmable and quantitative, Each temperature difference is set to correspond to a cooling working fluid control parameter having a specific temperature and flow rate, so that the present invention can achieve a more precise control effect of the heat treatment temperature under the programmable control operation, and the present invention can The program control system can be designed in two cooling working fluid control modes as described below.

1. Cooling working fluid active control mode: The cooling temperature of the steel workpiece 1 is controlled by cooling the quality and temperature of the working fluid. It is known that the steel workpiece 1 is to be cooled (i.e., temperature difference), the quality of the steel workpiece 1, and the specific heat of the steel workpiece 1. The specific gravity and specific heat of the cooling working fluid are known, and the temperature of the inflow and outflow is monitored instantaneously at a steady flow rate to obtain the temperature difference of the cooling working fluid, that is, the temperature difference of the cooling working fluid can also be controlled to be known, so that What is the calculated mass of the cooling working fluid required to flow through the cold heat exchange member 30 (calculated by Equation 2)? Therefore, as long as the flow rate of the cooling working fluid flowing through the cold heat exchange member 30 is controlled, when the flow rate (corresponding mass) of the cooling working fluid flowing through the cold heat exchange member 30 reaches a preset amount, the cooling of the working fluid flow can be stopped. This means that the steel workpiece 1 has reached the temperature range to be lowered, so that the steel workpiece 1 can be output. During this period, the temperature of the cooling working fluid is monitored at any time. When the rate of decrease of the temperature of the steel workpiece 1 is monitored to be small, the flow rate of the cooling working fluid can be controlled to accelerate the temperature drop rate of the steel workpiece 1. On the other hand, when the steel workpiece 1 is output, the cooling working fluid can be controlled to continue to flow, so that the temperature of the cold heat exchange member 30 (such as an aluminum plate) is lowered to an initial temperature (generally room temperature).

2. Cooling working fluid passive control mode: When the temperature of the steel workpiece 1 drops to the temperature range to be lowered, the steel workpiece 1 is output. During this period, the temperature of the cooling working fluid is monitored at any time. When the rate of decrease of the temperature of the steel workpiece 1 is monitored to be small, the flow rate of the cooling working fluid can be controlled to accelerate the temperature drop rate of the steel workpiece 1. After the steel workpiece 1 is output, the cooling working fluid can be controlled to continue to flow, so that the temperature of the cold heat exchange member 30 (such as the aluminum plate) is lowered to the initial temperature (generally room temperature). Moreover, the present invention can be further provided with a temperature control module 43. When the temperature before the cooling working fluid is input to the cold heat exchange member 30 is lower than the monitored preset temperature value, the heating component 430 of the temperature control module 43 can be utilized. It is heated to the preset temperature value. Similarly, when the temperature before the cooling working fluid is input to the cold heat exchange member 30 is higher than the monitored preset temperature value, the cooling member 431 of the temperature control module 43 can be used to cool to a preset temperature value.

In addition, it must be added that, depending on the application, the steel workpiece 1 prepared by the present invention must be tempered at different temperatures to meet the needs of various uses. For example, when the workpiece of the steel workpiece 1 is a tool, a bearing or a carburized and quenched part, the preset temperature value must be set at about 250 ° C for the low-temperature tempering heat treatment process, and the hardness of the steel workpiece 1 does not change much after the low temperature tempering. Therefore, the internal stress of the steel workpiece 1 is reduced, and the toughness is slightly increased. Secondly, when the workpiece of the steel workpiece 1 is a spring, the preset temperature value is set at about 350-500 ° C to perform the medium temperature tempering heat treatment process, thereby obtaining a higher bomb. Sex and necessary resilience. Secondly, when the workpiece is made of medium carbon structural steel, the preset temperature value must be set at about 500-600 ° C for high-temperature tempering heat treatment process, so that a good fit of strength and toughness can be obtained. .

Thus, by way of the specific embodiments described above, the present invention does have the following features:

1. The invention can replace the traditional lead bath quenching, steam quenching, oil quenching and steel mold water quenching and quenching processes, mainly by rapid heat conduction and cooling function of working fluid temperature control, in addition to achieving rapid heat conduction efficiency. In addition, the steel workpiece can be precisely adjusted to the required mechanical properties after heat treatment, so it is environmentally friendly (lead-free, oil-free and high-temperature steam, etc.), lower cost, shorter working hours and better quality. The strength of the performance and other advantages.

2. The present invention can maintain the heat treatment temperature within the required temperature range, and can be constructed by a feedback mechanism such as temperature and cooling working fluid flow rate, and the heat treatment temperature of the steel workpiece can be controlled during the heat treatment process. Must be within the temperature range.

3. The present invention can more effectively control the temperature of the cooling working fluid, and can be built by cooling the temperature control of the working fluid, so that the cooling working fluid can quickly reach the required heat treatment temperature, and the heat treatment temperature of the steel workpiece is obtained. It can be accurately maintained within the required temperature range.

The above is only a possible embodiment of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims should be It is included in the patent of the present invention. The invention is specifically defined in the structural features of the request item, is not found in the same kind of articles, and has practicality and progress, and has been consistent with the hair To clarify the patent requirements, and to file an application in accordance with the law, please ask the bureau to approve the patent in accordance with the law to protect the legitimate rights and interests of the applicant.

1‧‧‧Steel workpiece

10‧‧‧ Heat treatment gateway

11‧‧‧ Heat treatment chamber

12‧‧‧ Entrance

13‧‧‧Export

20‧‧‧Hot conductive metal enclosure

21‧‧‧Hot export surface

22‧‧‧Hot introduction surface

30‧‧‧Cold and heat exchange parts

31‧‧‧Heat absorption surface

32‧‧‧Cooling working fluid channel

40‧‧‧Cooling working fluid circulation conveyor

42‧‧‧Cooling working fluid delivery module

43‧‧‧temperature control module

44‧‧‧Control Module

45‧‧‧Transportation line

Claims (7)

A rapid heat conduction steel heat treatment system comprising: a heat treatment gate comprising a heat treatment chamber, and an inlet and an outlet respectively located at opposite ends of the heat treatment chamber, the inlet for inputting at least one steel material into the heat treatment chamber Performing a heat treatment for cooling, the outlet for outputting the at least one steel material from the heat treatment chamber; at least one heat conductive metal enclosure surrounding the heat treatment gate, the at least one heat conductive metal enclosure comprising And having at least one heat-extracting surface on the outer circumferential surface and at least one heat-introducing surface on the inner circumferential surface, the inner circumferential surface of the at least one thermal conductive metal enclosure and the at least one heat-introducing surface forming the heat treatment chamber of the heat treatment gate a wall surface of the chamber; the at least one heat introduction surface is in contact with the steel material, absorbing heat of the steel material and leading to the at least one heat-extracting surface through the interior of the at least one heat-conductive metal enclosure; at least one cold heat exchange member, the at least one heat and cold The exchange member includes at least one heat absorption surface and at least one cooling working fluid channel; the at least one heat absorption surface is in contact with the at least one heat export surface, and is absorbed into the Cooling the heat of the steel material to the inside of the at least one cold heat exchange member; cooling the working fluid circulation conveying device for circulating the cooling working fluid to the at least one cooling working fluid passage to cool the working fluid pair The heat of the steel material absorbed by the at least one cold heat exchange member is subjected to cold and heat exchange to cool the at least one cold heat exchange member; wherein the cooled working fluid circulation conveying device comprises at least one temperature detecting module, a cooling working fluid conveying module, a control module and a delivery line, the temperature detection module is configured to sense a temperature state of the steel in the heat treatment chamber to generate a temperature sensing signal; the cooling working fluid delivery module is configured to cool the working fluid Circulating and conveying the conveying pipeline and the cooling working fluid channel; the control module interprets and processes the temperature sensing signal to generate a temperature value, and compares with at least one preset temperature value, when the temperature value is higher than the When the preset temperature value is preset, the cooling working fluid delivery module is driven Increasing the cooling working fluid flow rate, when the temperature value is lower than the preset temperature value, driving the cooling working fluid delivery module to reduce the cooling working fluid flow rate. The rapid heat conduction steel heat treatment system according to claim 1, wherein the at least one heat conductive metal enclosure comprises two heat conductive metal enclosures respectively having a plate shape and being vertically symmetric; the at least one cold heat exchange member has two Each of the thermally conductive metal enclosures has a length and a width greater than a thickness of at least 3 times; the middle portions of the two thermally conductive metal enclosures are spaced apart from each other to form the heat treatment gate; and the opposite of the two thermally conductive metal enclosures Forming a heat introducing surface respectively; the heat introducing surfaces of the two heat conducting metal enclosures are parallel to each other; each of the heat conducting metal enclosures has a heat exporting surface to contact the heat absorbing surface of the cold heat exchange member . The rapid heat transfer steel heat treatment system according to claim 1 or 2, wherein the at least one heat conductive metal enclosure is made of steel. The rapid heat transfer steel heat treatment system according to claim 1 or 2, wherein the at least one cold heat exchange member is made of aluminum. The rapid heat conduction steel heat treatment system according to claim 1, wherein the cooling working fluid circulation conveying device further comprises a temperature control module, the temperature control module comprises a heating component, and a cooling component, the temperature control module The cooling working fluid may be heated by the heating component under the control of the control module; or the cooling working fluid may be selected to be cooled by the cooling component. The rapid heat conduction steel heat treatment system of claim 1, wherein the cooling working fluid circulation conveying device further comprises a flow sensing module connected to the conveying pipeline, wherein the flow sensing module is configured to sense the The flow rate of the cooling working fluid in the working fluid channel is cooled to generate a flow sensing signal, and sent to the control module for interpretation processing, as a reference for controlling the flow rate of the cooling working fluid by the control module. The rapid heat conduction steel heat treatment system according to claim 1, wherein the preset temperature value is between 150 and 600 degrees Celsius.