A rapid heating system and method for an alloy

Abstract

The present application relates to a kind of alloy fast heating system and method, belong to alloy solid solution technical field.The fast heating system includes heat conduction equipment and heating furnace box, heat conduction equipment includes upper die and lower die, and the heating of the piece to be heated to first preset temperature is heated by the heat conduction mode of upper die and lower die;Heating furnace box reaches the piece to be heated to second preset temperature by the mode of convection heat exchange or radiation heat exchange.The fast heating method is as follows: S1, the piece to be heated is placed between the upper die and lower die of the fast heating system, and the piece to be heated is pressurized by upper die or / and lower die movement;The piece to be heated is heated to first preset temperature by the heat conduction of the upper die and lower die;S2, open the upper die and lower die;S3, the piece to be heated reaching first preset temperature is placed in the heating furnace box of the fast heating system for secondary heating, and the piece to be heated is heated to second preset temperature.

Description

TECHNICAL FIELD

[0001] The application relates to a rapid heating system and method of an alloy and belongs to the technical field of alloy solid solution. BACKGROUND

[0002] In the field of automobile manufacturing with a huge amount, reducing the weight of the vehicle body can directly or indirectly reduce carbon emissions. Using light materials is an effective means for weight reduction of vehicles. Since aluminum alloy has small density and high specific rigidity, it is one of excellent materials for lightweight of vehicle body. The aluminum alloy hot forming process can reach a tensile strength of more than 550 MPa through aging strengthening of precipitates, and the hot forming parts have been used in Polestar high-performance electric vehicles and ES6 vehicles of Geely Volvo.

[0003] It is well known that the basic modes of heat transfer are heat conduction, convection and radiation. When there is a temperature difference between the interior of an object or the contact parts of the object, the process of heat transfer from high temperature to low temperature is called heat conduction or thermal conduction. The heat transfer process between the flowing fluid and the solid wall surface in contact with it is called convection heat transfer. When an object emits thermal radiation outward, it also receives thermal radiation energy projected onto its surface from surrounding objects and converts it into heat energy for absorption. The process of exchanging heat through thermal radiation is called radiation heat transfer.

[0004] However, up to now, one of the major problems of the aluminum alloy hot forming process is that the low heat absorption efficiency of the surface leads to a long heating time. For example, a general heating furnace generally takes about 30 minutes to complete solid solution, and even a blast heating furnace with high heating efficiency also needs about 10 minutes, which increases the cost of aluminum alloy hot forming parts. Some researchers use contact heating to heat aluminum alloy sheets. Although the aluminum alloy sheet heats up quickly, the melting point range of the aluminum alloy is generally 400-500 DEG C. For example, the solid solution temperature of 7 series aluminum zinc magnesium copper alloy parts is 475 DEG C plus or minus 5 DEG C. After reaching the solid solution temperature, the aluminum alloy sheet is seriously bonded to the die, which is difficult to separate from the heating die and affects the surface state of the part. Some scholars also spray heat-absorbing coatings on the surface of the aluminum alloy, but the heating effect is not significant, and the surface coating needs to be cleaned later, increasing the process.

[0005] In view of the above problems, it is urgent to develop a rapid heating system and method of an alloy. SUMMARY

[0006] The purpose of the present application is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0007] The technical scheme provided by the application is as follows: a rapid heating system of an alloy, comprising a heat conduction device and a heating furnace box, the heat conduction device comprises an upper die and a lower die, and the heat conduction device is used to heat the to-be-heated workpiece to a first preset temperature; the heating furnace box is used to heat the to-be-heated workpiece to a second preset temperature through the mode of convection heat exchange or radiation heat exchange.

[0008] Further, the heating furnace box is provided with a first heating element, the heat conduction device comprises an upper die and a lower die, the lower die is located in the heating furnace box, and the upper die is arranged above the lower die, the upper die is in transmission connection with a lifting driving device, and the upper die can be lifted in the heating furnace box.

[0009] Further, the heating furnace box is provided with a first heating element, the heat conduction device comprises an upper die and a lower die, the upper die is arranged above the lower die, the upper die and / or the lower die is provided with a second heating element on a die surface of the upper die and / or the lower die, and the upper die is in transmission connection with a lifting driving device.

[0010] Further, the positioning device is arranged on the lower die, and the positioning device is used to fix the to-be-heated workpiece to the lower die.

[0011] Further, the ejecting mechanism is used to eject the workpiece on the positioning device.

[0012] Further, the ejecting mechanism comprises a top rod and a pneumatic spring, one end of the top rod is connected with the pneumatic spring, the other end of the top rod penetrates through the lower die, and the pneumatic spring can drive the top rod to move up and down.

[0013] Further, the temperature sensor is used to detect the temperature of the to-be-heated workpiece.

[0014] Further, the control system is used to control the working cycle of the rapid heating system.

[0015] Further, the heating furnace box is further provided with a plurality of layers of storage grids.

[0016] The above further scheme has the beneficial effect that a plurality of to-be-heated workpieces can be heated at the same time, and the quantity production demand can be met.

[0017] Further, the first heating element is a heating wire or a heating rod embedded in the inner side wall of the heating furnace box, and the second heating element is a heating wire or a heating rod arranged on the upper die and / or the lower die.

[0018] A rapid heating method of an alloy by using a rapid heating system of the alloy, characterized in that the heating step is as follows:

[0019] S1, placing a to-be-heated part between the upper die and the lower die of the rapid heating system and pressing the to-be-heated part by moving the upper die or / and the lower die; heating the to-be-heated part to a first preset temperature by heat conduction of the upper die and the lower die;

[0020] S2, opening the upper die and the lower die;

[0021] S3, placing the to-be-heated part reaching the first preset temperature in a heating furnace box of the rapid heating system for secondary heating, so as to heat the to-be-heated part to a second preset temperature.

[0022] Further, in step S1, the first preset temperature is less than the solid solution temperature of the to-be-heated part; in step S3, the second preset temperature is the solid solution temperature of the to-be-heated part (12).

[0023] The beneficial effect of the above further scheme is that when the to-be-heated part reaches the first preset temperature in the heat conduction device of the rapid heating system, the to-be-heated part is not bonded with the upper die and the lower die, and the surface state of the part is not affected by demolding.

[0024] Further, in step S1, the die surface of the heat conduction device is first heated to a preset temperature, then the to-be-heated part is placed between the upper die and the lower die, and then the dies are closed; or the to-be-heated part is first placed between the upper die and the lower die, then the dies are closed, and then the die surface of the heat conduction device is heated to a preset temperature; or the to-be-heated part is first placed between the upper die and the lower die, then the die surface of the heat conduction device is heated to a preset temperature, and then the dies are closed.

[0025] Further, in step S1, the closing pressure of the upper die and the lower die is 10-50 MPa.

[0026] The beneficial effect of the above further scheme is that the pressing can make the to-be-heated part well contact with the surface of the upper die and the lower die.

[0027] Further, in S3, the temperature in the heating furnace box is raised to the second preset temperature of the to-be-heated part, the to-be-heated part is moved into the heating furnace box, the to-be-heated part is heated by using the way of strong convection or heat radiation, the to-be-heated part is heated to the second preset temperature and then continues to be kept warm for a period of time, and the solid solution is completed.

[0028] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects: the present application realizes the solid solution of the alloy with low surface heat absorption efficiency through two heat transfer modes, rapidly heats the to-be-heated part to a temperature not bonded with the upper die and the lower die through the heat conduction mode in the heat conduction equipment, and then heats the to-be-heated part reaching the first preset temperature to the second preset temperature through the convection heat exchange or radiation heat exchange mode in the heating furnace, thereby not only solving the technical problem that it is difficult to separate the to-be-heated part from the heating die when the to-be-heated part is directly heated to the solid solution temperature through the heat conduction heating mode due to the low melting point of the to-be-heated part, and affecting the surface state of the part, but also solving the technical problem that the heating time of the to-be-heated part is long due to the low surface heat absorption efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structure schematic diagram of the rapid heating system of the present application;

[0030] Figure 2 It is a structure schematic diagram of the upper die and the lower die of the rapid heating system of the present application when the upper die and the lower die are closed;

[0031] Figure 3 It is a structure schematic diagram of the upper die and the lower die of the rapid heating system of the present application when the upper die and the lower die are opened;

[0032] Figure 4 It is a structure schematic diagram of the rapid heating system of the present application when the ejector rod ejects the to-be-heated part;

[0033] Figure 5 It is a structure schematic diagram of the rapid heating system of the present application when the to-be-heated part is placed on the lower die;

[0034] In the figure, 1, upper die; 2, lower die; 3, ejector rod; 4, lifting driving device; 5, positioning device; 6, heating furnace box body; 7, heating wire or heating rod; 8, pneumatic spring; 9, thermocouple; 10, control system, 11, storage grid; 12, to-be-heated part. DETAILED DESCRIPTION

[0035] The principles and characteristics of the present application are described below in combination with examples, and the examples are only used to explain the present application and not to limit the scope of the present application. Specific embodiment one:

[0037] As shown in Figure 1 A rapid heating system of an alloy, comprising a heat conduction equipment and a heating furnace box body 6, the heat conduction equipment comprising an upper die 1 and a lower die 2, the to-be-heated part 12 is heated to a first preset temperature through the heat conduction mode of the upper die 1 and the lower die 2; the heating furnace box body 6 heats the to-be-heated part 12 reaching the first preset temperature to a second preset temperature through the convection heat exchange or radiation heat exchange mode.

[0038] The first preset temperature is less than the melting point temperature of the to-be-heated piece 12, at which the to-be-heated piece 12 is not bonded with the upper die 1 and the lower die 2, and the second preset temperature is higher than the first preset temperature.

[0039] The heating furnace box 6 is provided with a first heating element, which is a heating wire or a heating rod 7 embedded on the inner side wall of the heating furnace box 6. The heat conduction device includes an upper die 1 and a lower die 2. The lower die 2 is located in the heating furnace box 6, and the upper die 1 is arranged above the lower die 2. The upper die 1 is in transmission connection with a lifting driving device 4, and the upper die 1 can be lifted in the heating furnace box 6. The lifting driving device 4 is an oil cylinder, an air cylinder or a press machine, and the lifting driving device 4 can generate a pressure of 5-500 tons.

[0040] In addition, in the embodiment,

[0041] The positioning device 5 is further arranged on the lower die 2, and is used for fixing the to-be-heated piece 12 to the lower die 2.

[0042] The ejection mechanism is further arranged, and is used for ejecting the workpiece on the positioning device 5. The ejection mechanism includes a ejector rod 3 and a pneumatic spring 8. The ejector rod 3 is arranged in the lower die 2 and can move up and down. One end of the ejector rod 3 is connected with the pneumatic spring 8, and the other end of the ejector rod 3 passes through the lower die 2. The to-be-heated piece 12 arranged on the lower die 2 is ejected through the lifting action of the ejector rod 3.

[0043] The temperature sensor is further arranged, and is used for detecting the temperature of the to-be-heated piece 12.

[0044] The control system 10 is further arranged, and is used for controlling the working cycle of the rapid heating system. The opening and closing of the upper die 1 and the action of the ejection mechanism are controlled according to the temperature of the to-be-heated piece 12 detected by the temperature sensor, so as to control the heat conduction time of the to-be-heated piece 12.

[0045] The heating furnace box 6 is further provided with a plurality of layers of storage grids 11, which meet the mass production requirements.

[0046] More specifically,

[0047] The top rod 3 is a hollow rod, the hollow top rod 3 is internally provided with a thermocouple 9, the top rod 3 and the thermocouple 9 inside the top rod 3 are driven by a pneumatic spring 8 and can move in the vertical direction, so as to ensure that the thermocouple 9 is always in contact with the to-be-heated part 12, and the other end of the thermocouple 9 is connected with a control system 10. The to-be-heated part 12 is on the lower die 2 and is fixed by a positioning device 5 located on the surface of the lower die 2. The control system 10 controls the movement of the lifting driving mechanism simultaneously. Before the to-be-heated part 12 starts to be heated, the temperature of the heating furnace is first increased to a specified temperature. When the heating starts, the door of the heating furnace is opened, the mechanical hand places the to-be-heated part 12 at room temperature on the surface of the lower die 2, the mechanical hand is withdrawn, and the door of the heating furnace is closed. The lifting driving device 4 drives the upper die 1 to move downward, the surface of the upper die 1 is in contact with the to-be-heated part 12 and pressure is applied, so that the to-be-heated part 12 is in good contact with the surfaces of the upper die 1 and the lower die 2. The applied pressure is set according to the material and thickness of the to-be-heated part 12. For example, for a 2.5mm-thick 7-series aluminum-zinc-magnesium-copper alloy, the clamping pressure is 10-50MPa. The to-be-heated part 12 can be heated to a first preset temperature in a few seconds. The first preset temperature is less than the melting point temperature of the to-be-heated part 12. At this time, the to-be-heated part 12 is not bonded with the upper die 1 and the lower die 2. For example, the first preset temperature of the 2.5mm-thick 7-series aluminum-zinc-magnesium-copper alloy is about 350℃. It should be noted that the temperature varies according to different materials. The control system 10 controls the upper die 1 to move upward by detecting the temperature of the to-be-heated part 12 through a temperature sensor.

[0048] As shown in Figure 2 and 3 The method for heating a 2.5mm-thick 7-series aluminum-zinc-magnesium-copper alloy part to a solid solution state by the method of the present application is as follows:

[0049] (1) Heat conduction heating:

[0050] The temperature of the heating furnace is first increased to 500℃ (the corresponding temperature of a 6-series aluminum-magnesium-silicon alloy is higher) by the heating rods arranged on the side walls of the heating furnace box 6. The door of the heating furnace is opened, the mechanical hand moves the to-be-heated part 12 into the heating furnace box 6 and places it on the lower die 2, and the to-be-heated part 12 is positioned by the positioning device 5. Then, the lifting driving device 4 drives the lower die 2 to move downward, the to-be-heated part 12 is compressed, and a pressure of 10-50MPa is provided, so that the to-be-heated part 12 is in good contact with the surfaces of the upper die 1 and the lower die 2. The to-be-heated part 12 is heated to 350℃. The temperature of the to-be-heated part 12 is monitored by the thermocouple 9, and the control system 10 forms a relationship curve of the temperature of the to-be-heated part 12 and the heating time by collecting the temperature.

[0051] (2) Strong convection or heat exchange heating:

[0052] When the temperature of the workpiece 12 to be heated reaches 350℃, it no longer sticks to the mold. The control system 10 controls the upper mold 1 of the lifting drive device 4 to move upward. At the same time, the pneumatic spring 8 inflates, and the ejector rod 3 pushes the workpiece 12 out. The thermocouple 9 remains in contact with the workpiece 12. The control system 10 continuously collects the temperature rise curve. The workpiece 12, which reaches 350℃, is directly heated above the ejector rod 3 through convection or radiation heat transfer. When the temperature of the workpiece 12 reaches the second preset temperature of 475±5℃, it is held for about 2 minutes to complete the solution treatment. If necessary, the workpiece 12, which reaches 350℃, can be transferred by a robotic arm to the multi-layer storage compartment 11 inside the heating furnace chamber 6 for secondary heating. The furnace door is then opened, and the workpiece 12 is removed. Specific Implementation Example 2:

[0054] like Figure 4 As shown, a rapid heating system for an alloy includes a heat conduction device and a heating furnace body 6. The heat conduction device includes an upper mold 1 and a lower mold 2. The heat conduction device heats the workpiece 12 to a first preset temperature through heat conduction between the upper mold 1 and the lower mold 2. The heating furnace body 6 heats the workpiece 12, which has reached the first preset temperature, to a second preset temperature through convection heat transfer or radiation heat transfer.

[0055] The heating furnace housing 6 is equipped with a first heating element; the heat transfer device includes an upper mold 1 and a lower mold 2, the upper mold 1 being positioned above the lower mold 2, and a second heating element being provided on the mold surface of the upper mold 1 and / or the lower mold 2, the upper mold 1 being connected to the lifting drive device 4. The first heating element is a heating rod embedded in the inner wall of the heating furnace housing 6, and the second heating element is a heating wire.

[0056] In addition, in this embodiment,

[0057] It also includes a positioning device 5, which is installed on the lower mold 2 and is used to fix the part to be heated 12 to the lower mold 2.

[0058] It also includes an ejection mechanism for ejecting the workpiece from the positioning device 5. The ejection mechanism includes an ejector rod 3 and a pneumatic spring 8. The ejector rod 3 passes through the lower mold 2 and is capable of moving up and down. One end of the ejector rod 3 is connected to the pneumatic spring 8, and the other end of the ejector rod 3 is connected to the positioning device 5.

[0059] It also includes a temperature sensor for detecting the temperature of the element 12 to be heated.

[0060] The control system 10 is used for controlling the working rhythm of the rapid heating system. The opening and closing of the upper die 1 and the action of the ejection mechanism are controlled according to the temperature of the workpiece 12 detected by the temperature sensor, so as to realize the control of the heat conduction time of the workpiece 12.

[0061] The heating furnace box 6 is also provided with a plurality of layers of storage compartments 11.

[0062] More specifically,

[0063] The ejector rod 3 is a hollow rod, and the hollow ejector rod 3 is internally provided with a thermocouple 9. The ejector rod 3 and the thermocouple 9 inside the ejector rod 3 are driven by the pneumatic spring 8 and can move in the vertical direction, so as to ensure that the thermocouple 9 is always in contact with the workpiece 12. The other end of the thermocouple 9 is connected with the control system 10. The upper die 1 and the lower die 2 are both made of high-temperature-resistant alloy, and heating wires are arranged in the upper die 1 and the lower die 2. After the heating wires are powered on, the die surfaces of the upper die 1 and the lower die 2 are heated. Taking the 7-series aluminum-zinc-magnesium-copper alloy workpiece as an example, the target temperature of the die surfaces of the upper die 1 and the lower die 2 is 500 DEG C. If the workpiece 12 is a 6-series aluminum-magnesium-silicon alloy workpiece, the target temperature of the die surfaces of the upper die 1 and the lower die 2 needs to be higher. The temperature of the die surfaces of the upper die 1 and the lower die 2 is monitored by the thermocouple 9, and the control system 10 controls the on-off power supply of the heating wires. The workpiece 12 at room temperature is placed on the lower die 2 and fixed by the positioning device 5 arranged on the surface of the lower die 2. The lifting driving device 4 drives the upper die 1 to move downward, and the surface of the upper die 1 is in contact with the workpiece 12 and applies pressure, so that the workpiece 12 is in good contact with the surfaces of the upper die 1 and the lower die 2. The upper die 1 and the lower die 2 transmit heat to the workpiece 12. The control system 10 receives the temperature measurement signal from the thermocouple 9. Taking the 7-series aluminum-zinc-magnesium-copper alloy workpiece as an example, when the temperature of the workpiece 12 reaches 350 DEG C, the lifting driving device 4 drives the upper die 1 to move upward, and the pneumatic spring 8 ejects the workpiece 12 through the ejector rod 3. The mechanical hand quickly transfers the heated workpiece 12 into the heating furnace box 6. According to the thickness of the workpiece, the workpiece is heated for 3-6 minutes and kept for no more than 2 minutes, so as to meet the performance requirements and complete the heating and solid solution of the workpiece 12.

[0064] The method for heating the 2.5 mm thick 7-series aluminum-zinc-magnesium-copper alloy workpiece to the solid solution state by the method of the present application is as follows:

[0065] (1) Heat conduction heating:

[0066] The mold surface of the upper mold 1 and the lower mold 2 is heated to 500 DEG C by a resistance wire, the belt heating element is transferred to the lower mold 22, and is positioned by the positioning device 5; then the lifting driving device 4 is started to drive the upper mold 1 to descend, the to-be-heated element 12 is pressed tightly, and a pressure of 10-50 MPa is provided; the thermocouple 9 contacts the to-be-heated element 12 through the hollow top rod 3, monitors the temperature of the to-be-heated element 12, the control system 10 collects the temperature-time curve of the to-be-heated element 12, when the temperature of the to-be-heated element 12 rises to 350 DEG C, at this time, the to-be-heated element 12 is not adhered to the mold; the control system 10 controls the lifting driving mechanism to drive the upper mold 1 to ascend, at the same time, the pneumatic spring 8 is inflated, and the to-be-heated element 12 is pushed out through the top rod 3.

[0067] (2) strong convection heat transfer or radiation heat transfer heating:

[0068] The temperature in the heating furnace box 6 is raised to 500 DEG C in advance; the furnace door is opened, the manipulator transfers the to-be-heated element 12 reaching 350 DEG C into the heating furnace box 6, heats for 3-6 minutes to the solid solution temperature of the to-be-heated element 12, and then keeps warm for about 2 minutes to complete the solid solution; the furnace door is opened, and the to-be-heated element 12 is taken out.

[0069] As shown in Figure 5 , a plurality of to-be-heated elements 12 are placed on the lower mold 2 at the same time, the mold surface size of the upper mold 1 and the lower mold 2 is set according to the tonnage of the lifting driving device 4, for example, the synchronous heating of a plurality of to-be-heated elements 12 can be carried out at the same time, or the mold surface of the upper mold 1 or the lower mold 2 is designed as a step, and the plate materials with different thicknesses are heated at the same time.

[0070] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

[0071] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rapid heating method of an alloy using a rapid heating system of an alloy, characterized by, The alloy rapid heating system comprises a heat conduction device and a heating furnace box (6), the heat conduction device comprises an upper die (1) and a lower die (2), and the heat conduction device is used to heat a to-be-heated part (12) to a first preset temperature; the heating furnace box (6) is used to heat the to-be-heated part (12) reaching the first preset temperature to a second preset temperature through convection heat exchange or radiation heat exchange; and the heating steps are as follows: S1, the to-be-heated part (12) is placed between the upper die (1) and the lower die (2) of the rapid heating system, and the to-be-heated part (12) is pressurized through the movement of the upper die (1) or / and the lower die (2); and the to-be-heated part (12) is heated to the first preset temperature through the heat conduction of the upper die (1) and the lower die (2); S2, the upper die (1) and the lower die (2) are opened; S3, the to-be-heated part (12) reaching the first preset temperature is placed in the heating furnace box (6) of the rapid heating system for secondary heating, so that the to-be-heated part (12) is heated to the second preset temperature; In step S1, the first preset temperature is less than the solid solution temperature of the to-be-heated part (12); and in step S3, the second preset temperature is the solid solution temperature of the to-be-heated part (12).

2. The rapid heating method of an alloy according to claim 1, characterized by, In step S1, the die surface of the upper die (1) and / or the lower die (2) of the heat conduction device is first heated to a preset temperature, then the to-be-heated part (12) is placed between the upper die (1) and the lower die (2), and then the dies are closed; or the to-be-heated part (12) is first placed between the upper die (1) and the lower die (2), then the dies are closed, and then the upper die (1) and / or the lower die (2) of the heat conduction device is heated to a preset temperature; or the to-be-heated part (12) is first placed between the upper die (1) and the lower die (2), then the upper die (1) and / or the lower die (2) of the heat conduction device is heated to a preset temperature, and then the dies are closed.

3. The rapid heating method of an alloy according to claim 1, characterized by, In step S1, the closing pressure of the upper die (1) and the lower die (2) is 10-50 MPa.

4. The rapid heating method of an alloy according to claim 1, characterized by, In S3, the temperature in the heating furnace box (6) of the rapid heating system is raised to the second preset temperature of the to-be-heated part (12), the to-be-heated part (12) is moved into the heating furnace box (6) of the rapid heating system, the to-be-heated part (12) is heated by using strong convection or heat radiation, the to-be-heated part (12) is heated to the second preset temperature, and then the to-be-heated part (12) is kept warm for a period of time, so that the solid solution is completed.

5. The rapid heating method of an alloy according to claim 1, characterized by, The heating furnace box (6) is provided with a first heating element, the heat conduction device comprises an upper die (1) and a lower die (2), the lower die (2) is located in the heating furnace box (6), the upper die (1) is arranged above the lower die (2), the upper die (1) is in transmission connection with a lifting driving device (4), and the upper die (1) can be lifted in the heating furnace box (6).

6. The rapid heating method of an alloy according to claim 1, characterized by, The heating furnace box (6) is internally provided with a first heating element; the heat conduction equipment comprises an upper die (1) and a lower die (2), the upper die (1) is arranged above the lower die (2), the upper die (1) and / or the lower die (2) is provided with a second heating element on a die surface, and the upper die (1) is in transmission connection with a lifting driving device (4).

7. The rapid heating method of an alloy according to claim 1, wherein Further comprising a positioning device (5), the positioning device (5) is installed on the lower die (2), and the positioning device (5) is used for fixing the to-be-heated piece (12) to the lower die (2).

8. The rapid heating method of an alloy according to claim 7, wherein Further comprising an ejection mechanism, the ejection mechanism is used for ejecting the workpiece on the positioning device (5).

9. The rapid heating method of an alloy according to claim 8, wherein The ejection mechanism comprises a ejector rod (3) and a pneumatic spring (8), one end of the ejector rod (3) is connected with the pneumatic spring (8), the other end of the ejector rod (3) penetrates through the lower die (2), and the pneumatic spring (8) can drive the ejector rod (3) to move up and down.

10. The rapid heating method of an alloy according to claim 1, characterized by, Further comprising a temperature sensor, the temperature sensor is used for detecting the temperature of the to-be-heated piece (12).

11. The rapid heating method of an alloy according to claim 5 or 6, characterized in that, The heating furnace box (6) is internally further provided with a plurality of layers of storage grids (11).

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