Intelligent online heat treatment device for strengthening and toughening alloy through cooperation of temperature and electricity and heat treatment method of intelligent online heat treatment device

Abstract

The invention discloses an intelligent online heat treatment device for strengthening and toughening alloy through cooperation of temperature and electricity and a heat treatment method of the intelligent online heat treatment device. The online treatment device comprises a curling transmission system, a temperature and electricity treatment system and a cooling system. The temperature electric treatment system is composed of a heating furnace and a current conveying device, the heating furnace is provided with M sections of hearths, any section of hearth is independently controlled in temperature, the current conveying device comprises M groups of current conveying pole pieces, any group of current conveying pole pieces comprises a first current conveying pole piece and a second current conveying pole piece, the first current conveying pole piece and the second current conveying pole piece are arranged at the two ends of any section of hearth respectively and are in lap joint with the middle of a metal material to be treated in the width direction in the working process, and the cooling system comprises M cooling pools; the hearths and the cooling pools are alternately distributed; by means of the device, continuous gradient heat treatment of the metal material can be achieved, and the metal material is evenly heated in the heat treatment process through the temperature-electricity synergistic effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal material forming, and in particular relates to an intelligent online heat treatment device for strengthening and toughening a thermoelectric synergistic alloy and a treatment method thereof. Background Art

[0002] With the rapid development of 5G communication technology, the demand for high-performance materials in various industries continues to increase, especially in the fields of big data and intelligent manufacturing. Materials are the core of the development of industries such as industry, agriculture, military industry, semiconductors, metallurgy, aerospace, etc., especially in the application of large-width alloy plates and strips, the hardness, strength and plastic toughness of materials are crucial. However, there is an exclusive relationship between the hardness, strength and plastic toughness of materials. In the process of pursuing high-strength and high-hardness materials, the material cracks due to insufficient plastic toughness, which has become an important bottleneck restricting the development of the industry. In the manufacturing process of large-width alloy plates and strips, the insufficient plastic toughness of the material often leads to cracking of the plate, affecting the overall performance and service life of the product.

[0003] Improving the strength and plastic toughness of the alloy at the same time and achieving material toughening is one of the issues that must be considered in the preparation of alloy plates, strips, bars, wires, and pipes. It is also an effective way to solve the existing toughening process problems. Fine grain strengthening and precipitation strengthening are important means to improve the mechanical properties of alloys. By adding a modifier or rapid solidification during the smelting process, an ingot with fine grains can be smelted. Through large plastic deformation technologies such as equal channel extrusion, multi-directional compression, and large ratio extrusion, the grains can be refined to obtain small-sized deformed grains. The strength and plasticity of the material can be improved simultaneously by refining the grains, but the degree of strengthening is limited. Therefore, it is usually necessary to undergo appropriate heat treatment to form a large number of dispersed fine second phase particles in the alloy.

[0004] As a new process that can improve the organization and performance of materials quickly and effectively, the current main work focuses on high-energy electric pulse treatment of solid metals, which can control the microstructure and performance of materials. Its working principle is to apply high-energy pulse current on both sides of the metal material, that is, the pulse power supply inputs the pulse current into the energized area of ​​the metal material moving between the two electrodes through two electrodes, and the pulse current produces a coupling effect of Joule heating effect and non-thermal effect in the energized area of ​​the metal material. The pulse current significantly promotes the atomic diffusion in the material and the strong interaction with defects (vacancies, dislocations, grain boundaries), and can improve the organizational structure of the material by quickly inducing recovery, recrystallization, phase change and other behaviors, control the solidification organization of the metal material, refine the grains, improve the diffusion capacity of elements, and promote the uniform distribution of hard phases in the metal material; at the same time, because the high-energy electric pulse is transmitted through the pulse current between the two electrodes, it can only regulate the mechanical properties and processing properties of the material in the target area.

[0005] At present, there are many preparation and processing methods for high-performance alloys. Patent No. ZL201210209072.8 discloses a CuNiSiMg alloy material and its preparation method and a method for preparing strips with the alloy material; the method adopts the common production process of alloy plates and strips at home and abroad ("semi-continuous casting-homogenization treatment-hot rolling-milling-cold rolling-solution-cold rolling-aging" process). The main process flow of the production method is as follows: a large-sized alloy flat ingot is produced by a vertical semi-continuous ingot casting method, and then the alloy flat ingot is sent to a large-scale step-type high-temperature annealing furnace for heating, and then taken out of the furnace for hot rolling and blanking. The hot-rolled billet is subjected to double-sided milling to remove surface defects, and then rough rolling is performed; according to the strip products of different sizes, at least 1 to 2 intermediate annealing and pickling processes are required during the rolling process, and the strip after rough rolling is successively subjected to solution / quenching, cold rolling and aging treatment. However, this process has many problems in the actual production process: (1) In the semi-continuous casting process, it is difficult to control the composition of the ingot, there are many defects such as internal slag inclusions and pores, the density is low, and the quality of the ingot is poor; (2) In the production process, large-sized ingots need to be reheated to a higher temperature for hot rolling, which requires large heating and hot rolling equipment, large production investment and high energy consumption; (3) During the hot rolling and cold rolling process, the strip is prone to cracking, surface peeling, large residual stress, poor dimensional accuracy, and difficulty in process control, resulting in poor product quality and small coil weight; (4) The process is long, the environmental load is large, and the production cost is high. To solve the above problems, patent number CN107716885B discloses a short-process production method for high-strength and high-conductivity copper alloy strips. This method mainly adopts the process of "horizontal continuous casting - cold rolling - solution treatment - cold rolling - aging", and uses horizontal continuous casting to replace the "semi-continuous casting + homogenization treatment + hot rolling + milling" stage in the former process, removing a large number of high-energy consumption processes, improving the quality of the ingot, and improving the surface quality of the alloy. This process effectively shortens the process flow, reduces costs, and reduces environmental burden. However, there are still some high-energy consumption processes, such as solution treatment and aging treatment. Moreover, the above method is only applicable to the processing of small and medium-sized alloy plates and strips. For large-width alloy plates and strips, on the one hand, due to the large width of the plates and strips, the requirements for the size of the equipment furnace are increased, and the energy consumption required in the production process is greater and the cost is higher; on the other hand, due to the large width of the plates and strips, the plates and strips will be unevenly heated during the heating process, or in order to avoid the long heat treatment time caused by uneven heating, problems such as different organizational types and sizes, uneven performance, and low yield will occur; Patent No. CN111424224B discloses a method for preparing high-strength and high-toughness conductive copper alloy strips, which adopts "solution treatment-primary cold rolling-electric pulse heat treatment-secondary cold rolling-aging treatment".Patent No. CN115647319A discloses an intelligent continuous casting device and method for precipitation-strengthened alloy plates and strips, which adopts "ordinary smelting-electric pulse solution treatment". The above method uses electric pulse treatment to replace the traditional heat treatment process. Although it effectively solves the problems of coarse grains, long heat treatment cycle, high energy loss, and heavy environmental burden in the traditional heat treatment process, it also has high requirements on the alloy size. For large-sized alloys, due to the loss of thermal radiation during the electric pulse treatment process, the edge temperature or even the core temperature often cannot reach the target temperature, resulting in uneven heating or insufficient heat of the alloy, which makes it difficult to accurately control the alloy microstructure and performance. With the demand for high-quality metal materials in the downstream industry, not only higher requirements are put forward for the size, organization and performance of metal materials, but more importantly, higher requirements are also put forward for metal material processing equipment. Therefore, how to overcome the shortcomings of the existing metal material production process and develop an intelligent online processing device and method for metal materials with large cross-sections (such as large widths, etc.) is very important. Summary of the invention

[0006] In view of the shortcomings of the prior art, the first purpose of the present invention is to provide an intelligent online heat treatment device for thermoelectric synergistic alloy toughening. This device not only solves the problems of being restricted by the furnace chamber size, long heat treatment time, high energy consumption, and limited performance improvement in the traditional heat treatment process, but also avoids the subsequent deformation, cracking, and poor mechanical properties caused by uneven organization and difficult to control second phase precipitation due to uneven heating or insufficient heat in the forming process of large cross-section (such as wide width, etc.) metal materials. It significantly improves production efficiency, reduces production costs, improves the comprehensive performance of products, and can be used for industrial-scale production.

[0007] The second object of the present invention is to provide an intelligent online heat treatment method for strengthening and toughening alloys by combining temperature and electricity. The method of the present invention can effectively solve the problem that the microstructure and properties of alloys are difficult to accurately control due to uneven heating or insufficient heat in the traditional heat treatment and electric pulse treatment of metal materials with large cross sections (such as large widths, etc.), and can also perform continuous heat treatment of different systems as needed.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] The present invention provides an intelligent online heat treatment device for strengthening and toughening alloys by thermoelectric synergistic combination. The online treatment device comprises a curling transmission system, a thermoelectric treatment system, and a cooling system; the thermoelectric treatment system consists of a heating furnace and a current conveying device, the heating furnace is provided with M sections of furnace, and any section of the furnace is independently temperature-controlled, the current conveying device comprises M groups of current conveying electrodes, any group of current conveying electrodes comprises a first current conveying electrode and a second current conveying electrode, the first current conveying electrode and the second current conveying electrode are respectively arranged at the two ends of any section of the furnace, and when working, they are overlapped in the middle of the width direction of the metal material to be treated, the cooling system comprises M cooling pools; the furnace and the cooling pools are alternately distributed; M is 1 to 6;

[0010] The coiling transmission system comprises an uncoiling mechanism, a chain transmission mechanism and a coiling mechanism; the uncoiling mechanism is used to place a coil of metal material to be processed and uncoil the coil. After uncoiling, the metal material to be processed is driven by the chain transmission mechanism and passes through the furnace and the cooling pool alternately in sequence, and finally communicates with the coiling mechanism and is coiled by the coiling mechanism.

[0011] The online heat treatment device provided by the present invention is particularly suitable for a heat treatment device for metal materials with large cross sections (such as wide plate and strip materials, etc.). Based on the application principle of a heating furnace, heat is diffused evenly from the outside to the inside. In this process, due to the loss of heat, the temperature of the core of the material will be lower than the temperature of the edge, resulting in uneven temperature. The present invention adopts the synergistic effect of an electric furnace and a current transmission device in a temperature-electric treatment system, uses an electron transmission device to transmit current, and transmits current to the metal material to be treated from the core to the edge to radiate heat, thereby achieving uniform distribution of the temperature of the entire material during the heat treatment process of the metal material with large cross sections (such as wide plate and strip materials, etc.);

[0012] In addition, the present invention can divide the furnace of the heating furnace into sections and distribute them alternately with the cooling pools. At the same time, by independently controlling the temperature of the furnaces of different sections, continuous multi-temperature aging or recrystallization softening annealing or step solution treatment or stress relief annealing of the material is achieved.

[0013] According to a preferred solution, the furnace body of the heating furnace comprises a furnace shell, a furnace shell bracket, a furnace lining, a furnace door, a base frame, a thermal insulation layer, and a refractory layer. The furnace shell adopts an upper and lower opening and closing structure and a full-fiber cotton ceiling structure; the furnace shell is formed by bending and welding stainless steel plates and is provided with well-shaped reinforcement ribs; a refractory layer and a thermal insulation layer are sequentially arranged between the furnace shell and the furnace lining from the inside to the outside, wherein the refractory layer is built with high-quality high-aluminum shaped bricks, and the thermal insulation layer is made of high-temperature resistant ceramic fiber cotton; the heating tubes for heating are arranged in the furnace lining, and the opening and closing degree of the furnace door is adjustable.

[0014] In a preferred solution, the cross section of any section of the furnace of the heating furnace is D-shaped, and the bottom adopts a corrugated structure.

[0015] In a preferred solution, the cross-sectional dimensions of the furnace of the heating furnace are 100-800 mm×1-30 mm. The furnace of the heating furnace in the present invention is 100-800 mm wide and 1-30 mm high, which is suitable for processing alloy materials with large cross sections (such as large widths, etc.).

[0016] Preferably, each furnace section in the heating furnace is independently temperature controlled by SCR+PID.

[0017] In a preferred solution, the front section and the rear section of the heating furnace are equipped with a heating tube thermal directional expansion device, which ensures that the heating tube does not deform or slightly deforms longitudinally when the temperature rises.

[0018] Preferably, the total length of the M-section furnace is 500-3000 mm, the operating temperature is 25-1300° C., and the heating rate is 10-150° C. / min.

[0019] Preferably, the total length of the M cooling pools is 500-3000 mm, and the cross-sectional dimensions are 100-800 mm×1-30 mm.

[0020] In a preferred solution, the cooling medium of any cooling pool is transported by dual pipelines and output by a single pipeline.

[0021] Each cooling pool is independent. When the cooling medium is water, each cooling pool adopts countercurrent water inlet, double water inlet pipes with a diameter of DN40, and single water outlet pipe with a diameter of DN50, double inlet and single outlet.

[0022] Through double inlet and single outlet, step cooling or quenching can be achieved to avoid cracking of certain materials.

[0023] Preferably, the conventional curling system further comprises a frame, and the frame is used to fix the unwinding mechanism, the winding mechanism, and the chain transmission mechanism. The frame is made of stainless steel, and the various components on the frame are insulated.

[0024] According to a preferred embodiment, the unwinding mechanism adopts a vertical expansion and contraction unwinding method. The coil is placed vertically on the expansion and contraction reel. After being tensioned by the expansion and contraction reel, the expansion and contraction reel is driven to rotate by a motor with a magnetic powder clutch, thereby driving the coil to unwind. The unwinding speed of the unwinding mechanism is 0 to 30 m / min.

[0025] In a preferred embodiment, the winding speed of the winding mechanism is 0 to 30 m / min.

[0026] Preferably, the curling transmission system further comprises rollers, which are divided into several groups and respectively installed under the furnace support of the heating furnace and under the cooling pool support of the cooling system. The rollers are driven to rotate through a chain transmission mechanism, and the metal materials to be processed are controlled to run through the rollers.

[0027] In a preferred solution, the online processing device further comprises a PC control system, and the PC control system comprises a high-performance computer device, a PID closed-loop control device, and a system emergency stop device.

[0028] Preferably, the online processing device further comprises a power supply control system, which comprises an output power supply, a three-phase controller, and a transformer; the output power supply is selected from one of a pulse power supply, a DC power supply, and an AC power supply.

[0029] Further preferably, the pulse power supply includes a low-frequency high-peak pulse power supply and a high-frequency low-peak pulse power supply.

[0030] Preferably, the heating furnace can be a resistance heating furnace or an induction heating furnace.

[0031] Preferably, the online processing device further comprises an electrical control system, wherein the electrical control system comprises a cabinet, an air switch, a temperature control meter, a voltmeter, an ammeter, and a speed regulator;

[0032] The temperature control meter described in the present invention has high regulation quality without overshoot and undershoot and excellent anti-interference ability, is easy to operate and can display the set value and the measured value respectively; the PID parameters can be set by themselves and can maintain a very high temperature regulation accuracy.

[0033] In a preferred embodiment, the online processing device further includes a temperature measurement and control system, which includes temperature measuring elements. The temperature measuring elements are distributed in three zones of "upper, middle and lower" in the furnace of the heating furnace, and each zone is separated by no less than 100 mm; the number of temperature measuring elements in any section of the furnace is 3 to 6, and the temperature measuring elements are selected from infrared thermometers and / or thermocouple wires.

[0034] Through the temperature measurement and control system, the temperature of the material during the processing can be detected, so as to accurately control the current of the current transmission device.

[0035] In a preferred embodiment, the online processing device further comprises a gas protection system, which comprises two gas circuit devices, a pressure reducing valve, a pressure gauge, a pressure flow regulator and a flow meter. During the annealing process, argon (Ar), nitrogen (N2), hydrogen (H2), a mixture of hydrogen and nitrogen and the like can be introduced for atmosphere protection. In order to prevent the workpiece from being oxidized when the protective gas fails or a power outage occurs, a passage is connected in parallel to the gas circuit, and once the ventilation device fails, it can be introduced into the furnace, thereby protecting the workpiece.

[0036] The present invention also provides an intelligent online heat treatment method for strengthening and toughening the alloy by thermoelectric synergistic alloys. The online processing device is used to place the coil formed by the metal material to be processed on the uncoiling mechanism. After uncoiling, the metal material to be processed is driven by the chain transmission mechanism and alternately passes through the furnace for thermoelectric synergistic treatment and through the cooling pool for cooling treatment. Finally, it is connected with the coiling mechanism and coiled by the coiling mechanism.

[0037] During the temperature-electricity coordinated treatment, the metal material is heated by a heating furnace and a current is applied to the metal material by a current conveying device, and the temperature difference between the temperature of the middle edge area and the temperature of the core area of ​​the metal material is controlled to be ±(5-10)°C during the temperature-electricity coordinated treatment;

[0038] The metal material to be processed alternately passes through the furnace for temperature-electric coordinated treatment and passes through the cooling pool for cooling treatment. According to the heat treatment system of the metal material to be processed, the temperature of each furnace section and the cooling medium transportation of each cooling pool section are independently set.

[0039] In a preferred embodiment, the metal material is selected from any one of copper alloy, titanium alloy, magnesium alloy, aluminum alloy, iron alloy and the like.

[0040] In a preferred embodiment, the shape of the metal material is selected from the group consisting of plates, strips, bars, wires, tubes, and special-shaped materials.

[0041] In a preferred solution, the width of the metal material is in the range of 0 to 1000 mm, preferably 100 to 600 mm.

[0042] In a preferred solution, before the uncoiling mechanism uncoils, the initial information of the metal material and the instruction parameter information are first input into the PC control system.

[0043] The initial information of the metal material includes alloy composition, material size (width, thickness, etc.), raw material type, metal raw material quality, melting point temperature, boiling point temperature, etc. of the metal raw material.

[0044] The instruction parameters include protective gas flow rate, heating rate, holding temperature, holding time, pulling speed, edge and core temperature difference threshold, cooling water flow, induction heating current, induction heating voltage, tension, curling speed, current parameters, cooling medium, cooling method, cooling speed, protective gas type, gas flow, etc.

[0045] The preferred solution is that after the coil formed by the metal material to be processed is placed on the unwinding mechanism, one end of the chain tooling in the chain transmission mechanism is first fixed to the front end of the metal material in a "three-bundle-in-one" manner, and the other end passes through the thermoelectric treatment system and the cooling system to be connected to the curling mechanism in a "one-bundle-in-one" manner.

[0046] In the present invention, "three bundles in one" refers to the connection between the metal material and the curling mechanism to prevent the strip from being too thin during the traction process and causing the concentration of force to cause breakage, and "one bundle in one" plate and strip is connected to the uncoiling mechanism to prevent the strip from loosening.

[0047] The preferred solution is that the PC control system sends instruction parameters to the power control system, electrical control system, curling transmission system, thermal and electrical processing system, gas protection system, and cooling system. After the furnace temperature of the heating furnace reaches the instruction temperature and the furnace body is filled with protective gas, the thermal and electrical coordinated processing begins; the instruction parameters include curling speed, protective gas type, gas flow rate, heating furnace heating speed, insulation temperature, current parameters, cooling medium, cooling method, and cooling speed.

[0048] When pulse current is used, pulse frequency and pulse width are also included.

[0049] In the preferred solution, during the temperature-electricity coordinated treatment, the temperature of each area of ​​the metal material is monitored by the temperature measurement and control system, and the temperature is fed back to the PC control system in real time in the form of electrical signals to ensure that the current applied to the metal material matches the energy of the heating furnace treatment, so as to control the temperature difference between the edge area and the core area of ​​the metal material to be ±(5-10)°C.

[0050] In the present invention, the initial information of the metal material (alloy composition, size) is first entered into the PC control system, and the material (alloy plate, strip, wire, rod, etc.) is placed in the unwinding mechanism of the traditional curling system, and one end of the chain tooling in the chain transmission mechanism is fixed to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the thermoelectric treatment system and the cooling system to connect with the coiling mechanism in a "one-beam-in-one" manner. The PC control system sends command parameters (coiling speed, protective gas type, gas flow, muffle furnace heating speed, insulation temperature, current parameters (such as pulse current intensity, voltage intensity, pulse frequency, pulse width), cooling medium, cooling method, cooling speed, etc.) to the power control system, electrical control system, curling transmission system, thermoelectric treatment system, gas protection system, and cooling system. After the furnace cavity temperature reaches the command temperature and the furnace body is filled with protective gas, online processing begins. During the processing, the temperature of each area of ​​the material is monitored by the temperature measurement and control system, and the electrical signal is fed back to the PC control system in real time to ensure that the energy of the electrical treatment matches that of the heating furnace treatment, so as to control the temperature of the edge area and the temperature of the core area of ​​the material to be maintained at ±5-10°C. Subsequently, the alloy material is pulled out by the curling mechanism, and the final high-performance, high-quality alloy material with uniform organization in each area and uniform distribution of the second phase is formed.

[0051] In a preferred solution, the unwinding speed of the unwinding mechanism and the winding speed of the winding mechanism are 0.01 to 1 m / min.

[0052] Preferably, during the temperature-electricity coordinated treatment process, the furnace temperature of the heating furnace ranges from 25 to 1300° C., and the heating rate is from 10 to 150° C. / min.

[0053] In a preferred embodiment, the type of current applied to the metal material by the current conveying device is selected from direct current, alternating current, constant current, and pulse current, preferably pulse current.

[0054] In the preferred embodiment, during the thermoelectric synergistic treatment, a current conveying device is used to apply a current with a density of 10 4 ~10 6 A / cm 2 .

[0055] Further preferably, when the current type is pulse current, the pulse current frequency is 10 to 2000 Hz.

[0056] In a preferred embodiment, the thermoelectric coordinated treatment is carried out under the protection of a protective gas, and the flow rate of the protective gas is 0.1 to 20 L / h. The types of protective gas include argon, nitrogen, hydrogen, and a mixture of nitrogen and hydrogen.

[0057] In a preferred solution, the cooling medium used in the cooling treatment is selected from one of inert gas, water, oil and salt. In actual operation, for materials with alloy content less than 10wt%, inert gas and water can be used; for materials with alloy content greater than 15wt%, inert gas, oil and salt with lower cooling speed should be used.

[0058] Principles and advantages

[0059] For metal materials with large cross-sections (such as wide strips and plates), on the one hand, due to the widening of the cross-section and the limitation of the electric pulse power, the material needs to run at a very slow speed to reach the target temperature. On the other hand, due to the heat radiation loss, the edge temperature or even the core temperature of the material cannot reach the target temperature, so the performance and organization control of the alloy cannot meet the target requirements; in addition, if the material runs too slowly, it takes a long time and the efficiency is too low.

[0060] The present invention designs a temperature-electricity synergistic device, adopts a traditional heating furnace to provide the basic temperature, and couples electricity on this basis. The coupling effect between the two can be used to process alloy materials with large cross-sections (wide, thick, and rough). At the same time, it can greatly increase the speed of the belt processing metal material passing through the heating furnace during the continuous production process, thereby improving production efficiency.

[0061] Compared with the prior art, the present invention has the following beneficial effects:

[0062] (1) Compared with the existing alloy plate and strip production processes ("semi-continuous casting-homogenization treatment-hot rolling-milling-cold rolling-solid solution-cold rolling-aging" and "horizontal continuous casting-cold rolling-solid solution-cold rolling-aging"), the present invention provides an intelligent temperature-electric synergistic alloy strengthening and toughening online processing device, which combines the current transmission device with the traditional heat treatment equipment, uses the monitoring system to monitor the temperature field of each area of ​​the alloy plate and strip in real time, and uses the PC control system to achieve the consistency of the temperature of the "core", "middle" and "edge" of the plate and strip with a large cross section (such as a large width, etc.). This is to solve the problem that in the traditional heat treatment process, the material is heated unevenly during the heating process, and in the current treatment process, the power supply power is too low and the energy input cannot reach the target value during the heating process, resulting in insufficient heat input to drive the microstructure change of large cross-section (such as large width, etc.) plates and strips, so as to prevent the alloy from cracking, substandard performance, increased loss rate and other phenomena in the subsequent processing process; at the same time, the PC control system is used to realize the integrated intelligent control of the online temperature-electric coordinated strengthening and toughening treatment of large cross-section (such as large width, etc.) alloy materials, thereby improving production efficiency and reducing production costs.

[0063] (2) In addition, the present invention also provides an intelligent online heat treatment method for strengthening and toughening alloys by thermoelectric synergistic alloys. The processing method of the present invention adopts automatic control throughout the process. During the processing, the temperature of each area of ​​the metal material is monitored by the temperature measurement and control system, and the temperature is fed back to the PC control system in real time in the form of electrical signals to ensure that the energy of the electrical treatment and the heating furnace treatment is matched, so as to control the temperature of the edge area of ​​the material to be consistent with the temperature of the core area. The metal material can achieve rapid thermoelectric synergistic treatment, and realize continuous and rapid solid solution, aging, recrystallization and stress relief annealing treatment of the alloy in a shorter time and at a lower temperature, so as to achieve the goals of matrix grain refinement, precipitation phase dispersion, texture optimization, and internal stress homogenization. Compared with the existing alloy material processing technology, the processing method of the present invention is based on "core" electrical treatment + "middle edge" traditional heat treatment. This molding process can effectively solve the problems of uncontrollable organization and poor performance caused by uneven heating of large cross-section materials (such as large width, etc.) during heating. At the same time, it can greatly reduce the process flow, reduce the environmental load, achieve full automation, improve processing efficiency, reduce labor costs, and can be used for industrial-scale production.

[0064] The present invention can divide the furnace of the heating furnace into sections and distribute them alternately with the cooling pools, and at the same time independently control the temperature of the furnaces of different sections, thereby realizing continuous multi-temperature aging or recrystallization softening annealing or step solution treatment or stress relief annealing of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a structural schematic diagram of an intelligent online processing device for thermoelectric synergistic alloy strengthening and toughening according to the present invention.

[0066] Among them, 1 is the PC control system, 2 is the power control system, 3 is the electrical control system, 4 is the curling transmission system, 5 is the temperature and electricity treatment system, 6 is the gas protection system, 7 is the cooling system, and 8 is the temperature measurement and control system.

[0067] Figure 2 This is a schematic diagram of the thermoelectric treatment system of the present invention, in which: 1. feeding roller; 2. positioning roller; 3. current input positive electrode; 4. power supply; 5. a furnace; 6. current input negative electrode; 7. cooling pool; 8. positioning roller; 9. winding roller.

[0068] Figure 3 This is a physical picture of an intelligent online processing device for strengthening and toughening thermoelectric synergistic alloys according to the present invention. DETAILED DESCRIPTION

[0069] The present invention is described in detail below with reference to the accompanying drawings

[0070] like Figure 1As shown, it is a schematic diagram of the intelligent thermoelectric synergistic alloy strengthening and toughening online processing device of this specific embodiment, which is mainly composed of PC control system 1#, power control system 2#, electrical control system 3#, curling transmission system 4#, thermoelectric processing system 5#, gas protection system 6#, cooling system 7#, temperature measurement and control system 8# and other parts.

[0071] The PC control system 1# includes a high-performance computer device, a PID closed-loop control device, and a system emergency stop device.

[0072] The power control system 2# includes a high-energy pulse power supply, a DC power supply, an AC power supply, a three-phase controller, and a transformer.

[0073] The high-energy pulse power supply includes a low-frequency high-peak pulse power supply and a high-frequency low-peak pulse power supply.

[0074] The electrical control system 3# includes a cabinet, an air switch, a temperature control meter, a voltmeter, an ammeter, a speed regulator, etc.;

[0075] The temperature controller has high regulation quality without over-regulation and under-regulation and excellent anti-interference ability, is easy to operate and can display the set value and the measured value respectively; the PID parameters can be set by themselves and can maintain a very high temperature regulation accuracy.

[0076] The conventional curling system 4# comprises a frame, an unwinding mechanism, a chain transmission mechanism, and a curling mechanism.

[0077] The frame is used to fix the unwinding mechanism, the winding mechanism, the chain transmission mechanism and the furnace body. The components on the frame are insulated and the frame is made of stainless steel.

[0078] The unwinding mechanism is used to coil the strip before heat or electrical treatment. It adopts a vertical expansion and contraction unwinding method. The coil is placed vertically on the expansion and contraction reel. After being tensioned by the expansion and contraction reel, the motor with a magnetic powder clutch drives the expansion and contraction reel to rotate, driving the material roll to unwind. Unwinding speed: 0-30m / min, radius: 300mm.

[0079] The chain transmission mechanism is used for pulling samples such as metal plates, strips, bars, wires, etc., and can adjust the tension.

[0080] The coiling mechanism is used to coil the strip after heat treatment. The tooling with a chain first passes through the heating section and cooling section of the equipment to fix the front end of the plate, strip, wire and rod; after the tooling is tightened by the expansion and contraction reel, the motor with a magnetic powder clutch drives the expansion and contraction reel to rotate, driving the material to pass through the temperature and electricity treatment system and cooling system before winding. Winding speed: 0-30m / min, radius: 300mm.

[0081] The thermal-electric treatment system 5# includes a heating furnace and a current conveying device.

[0082] The heating furnace is provided with 1-6 sections of furnace, and the cross-sectional size of the furnace of the heating furnace is 100-800 mm×1-30 mm. The furnace of the heating furnace in the present invention is 100-800 mm wide and 1-30 mm high, which is suitable for processing alloy materials with large cross sections (such as large width, etc.). The total length of the 1-6 sections of furnace is 500-3000 mm.

[0083] The current conveying device includes 1-6 groups of current conveying electrodes, and any group of current conveying electrodes includes a first current conveying electrode and a second current conveying electrode. The first current conveying electrode and the second current conveying electrode are respectively arranged at the two ends of any section of the furnace.

[0084] In one specific embodiment, the furnace body is composed of a furnace shell, a furnace shell bracket, a furnace lining, a furnace door with adjustable opening and closing degree, etc., and is about 3 meters long. Furnace tube thermal directional expansion devices are installed at the front end and the end of the furnace body to ensure that the furnace tube does not deform or slightly deforms longitudinally when the temperature rises.

[0085] In one of the specific implementation schemes, the furnace shell adopts an upper and lower opening and closing structure and a full-fiber cotton ceiling structure to facilitate the maintenance and replacement of furnace tubes. The base frame and furnace shell are welded by steel sections and steel plates. The refractory layer of the furnace body adopts high-quality high-aluminum shaped bricks, and the insulation layer is composed of high-temperature resistant ceramic fiber cotton.

[0086] A roller is arranged under the furnace shell support, and the processed materials (plates, strips, wires, bars) can run freely on the roller. The furnace shell support is made of section steel.

[0087] In one specific embodiment, the heating device adopts a muffle furnace and a current conveying device, wherein the total length of the muffle furnace heating section is about 3000mm, the working temperature is 25-1300℃, the heating rate is 10-150℃ / min, and the furnace shell is made of 310S / δ10mm stainless steel plate, which is bent and welded and provided with well-shaped reinforcement ribs. The cross section is D-shaped, the bottom adopts a corrugated structure, and the size is 260mmx30mm. The heating area of ​​the muffle furnace is divided into 3 heating furnace areas, and the 3 areas are independently temperature controlled. The temperature control method is SCR+PID. .

[0088] In one specific embodiment, the current conveying device comprises three sets of current conveying electrodes, and any set of current conveying probes comprises a first current conveying electrode and a second current conveying electrode, and the first current conveying electrode and the second current conveying electrode are respectively arranged at the two ends of any section of the furnace, and when working, overlap the middle part of the width direction of the metal material to be processed.

[0089] In one specific embodiment, the gas protection system 6# includes two gas circuit devices, a pressure reducing valve, a pressure gauge, a pressure flow regulator and a flow meter. During the annealing process, gases such as argon (Ar), nitrogen (N2), and hydrogen (H2) can be introduced for atmosphere protection. In order to prevent the workpiece from being oxidized when the protective gas fails or the power is cut off, a passage is connected in parallel to the gas circuit, and once the ventilation device fails, it can be introduced into the furnace, thereby protecting the workpiece.

[0090] The cooling system 7# includes a cooling pool bracket. There are two cooling methods that can be switched at will, the first is jet cooling, and the second is temperature-controlled water cooling to achieve rapid cooling.

[0091] The cooling system comprises 1 to 6 cooling pools, the total length of the 1 to 6 cooling pools is 500 to 3000 mm, and the cross-sectional size is 100 to 800 mm×1 to 30 mm.

[0092] In one specific embodiment, the cooling pool is 3 meters long, and rollers are added below the cooling pool (the rollers are fixed on the bracket and the height is adjustable). When the cooling pool expands and contracts with the change of the temperature in the furnace, the cooling pool can move freely on the rollers. The bracket is made of steel, and rollers are installed below the bracket to support the material belt to run.

[0093] In one specific embodiment, the cross-sectional shape and size of the cooling pool is 260x30mm. The material of the inner furnace tube is 304 / δ=8mm, and the material of the water jacket is Q235 / δ=4.0mm. The cooling pool is divided into three independent sections; the length of each section is 1000mm. Each water-cooling section adopts countercurrent water inlet, double water inlet pipes with a pipe diameter of DN40; single water outlet pipe with a pipe diameter of DN50; double inlet and single outlet, a water temperature meter and an over-temperature alarm device are installed near the outlet pipe to monitor the temperature of the cooling water and adjust the water flow.

[0094] In one specific implementation scheme, the furnace of the heating furnace is divided into sections and alternately distributed with cooling pools. At the same time, the temperature of the furnaces in different sections is independently controlled, thereby achieving continuous multi-temperature aging or step solution treatment of the material.

[0095] The temperature measurement and control system 8# includes temperature measuring elements, which are distributed in three areas of "upper, middle and lower" in the furnace of the heating furnace, and each area is separated by no less than 100mm; the number of temperature measuring elements in any section of the furnace is 3 to 6, and the temperature measuring elements are selected from infrared thermometers and / or thermocouple wires.

[0096] In one of the specific implementation schemes, the temperature measurement and control system 8# is fed back by 6 thermocouples, which are distributed in three areas of "upper, middle and lower", and each area is not less than 100mm apart. It is used to record the temperature of each position of the molding system in real time and feed it back to the PC system.

[0097] The present invention also provides an intelligent online heat treatment method for strengthening and toughening alloys by using the above device, which can be applied to aluminum alloys, copper alloys, magnesium alloys, titanium alloys, iron alloys and other metals. The specific operation includes the following steps:

[0098] (1) Data entry. First, the initial information of the alloy plate and strip is entered into the PC control system, including alloy system, alloy composition, plate and strip width and thickness, plate and strip conductivity, shielding gas medium type, shielding gas flow rate, muffle furnace heating rate, insulation temperature, pulse current intensity, voltage intensity, pulse frequency, pulse width, edge and core temperature difference threshold, cooling medium, cooling method, cooling rate, and coiling speed.

[0099] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0100] (3) Thermoelectric treatment. The PC control system sends command parameters (coiling speed, protective gas type, gas flow, muffle furnace heating speed, insulation temperature, pulse current intensity, voltage intensity, pulse frequency, pulse width, cooling medium, cooling method, cooling speed, etc.) to the power control system, electrical control system, curling transmission system, thermoelectric treatment system, gas protection system, and cooling system. After the furnace chamber temperature reaches the command temperature and the furnace body is filled with protective gas, online treatment begins. During the treatment process, the temperature of each area of ​​the material is monitored by the temperature measurement and control system, and the temperature is fed back to the PC control system in real time in the form of electrical signals to ensure that the energy of the electric pulse treatment matches that of the induction heating treatment, so as to control the temperature of the edge area and the temperature of the core area of ​​the material to be maintained at ±5 to 10°C. Subsequently, the alloy material is pulled out by the curling mechanism, and finally a high-performance, high-quality alloy material with uniform organization in each area and uniform distribution of the second phase is formed.

[0101] Example 1

[0102] An intelligent online heat treatment method for strengthening and toughening a thermoelectric synergistic alloy, using the device in the above specific implementation scheme, taking a Cu-Ni-Sn alloy as an example, comprises the following steps:

[0103] (1) Data entry. The initial information of the alloy plate and strip was first entered into the PC control system, including alloy system (Cu-15Ni-8Sn), alloy composition (Cu: 77wt%, Ni: 15wt%, Sn: 8wt%), alloy state (cold rolled, deformation 90%), plate and strip width (600mm) and thickness (2mm), protective gas medium type (Ar gas), protective gas flow rate (30L / h), muffle furnace heating rate (20℃ / min), holding temperature (400℃), pulse current intensity (90A), voltage intensity (4V), pulse frequency (400Hz), edge and core temperature difference threshold (5℃), cooling medium (H2O), cooling method (water cooling), and coiling speed (60mm / min).

[0104] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0105] (3) Thermoelectric treatment (heat treatment system: 400℃ / 30min). Since the heat treatment system has only one temperature, only one furnace temperature is opened, and cooling water is injected into a cooling pool for quenching treatment. The specific process is: turn on the muffle furnace switch to start heating, and open the gas valve channel after the furnace chamber temperature reaches 400℃. After ventilation for 10 minutes, the PC control system adjusts the gear position in the power control system to the "pulse power" gear position, and issues parameter instructions (pulse current intensity is 90A, voltage intensity is 4V, pulse frequency is 400Hz) to perform pulse electric treatment on the plate and strip. At the same time, an instruction is issued to the curling transmission system to start pulling and curling the plate and strip. The temperature of each area of ​​the material is monitored by the temperature measurement and control system, and the electrical signal is fed back to the PC control system in real time to ensure that the energy of the electric pulse treatment and the induction heating treatment is matched, so as to control the temperature of the edge area and the temperature of the core area of ​​the material to be kept at ±5℃. When the plate and strip are drawn out of the thermoelectric treatment system and enter the cooling pool, the PC control system issues a corresponding instruction to the cooling system to quench the plate and strip.

[0106] performance Heart Central Edge tensile strength 1604MPa 1593MPa 1588MPa hardness 432HV 428HV 430HV Elongation 7.2％ 6.9％ 6.8％ Electrical conductivity 11.2%IACS 11.1%IACS 11.1%IACS

[0107] The performance indicators of the alloy plate and strip in this embodiment are as follows:

[0108] Example 2

[0109] An intelligent online treatment method for strengthening and toughening a thermoelectric synergistic alloy, taking a Cu-Ni-Sn alloy as an example, comprises the following steps:

[0110] (1) Data entry. The initial information of the alloy plate and strip was first entered into the PC control system, including alloy system (Cu-9Ni-6Sn), alloy composition (Cu: 85wt%, Ni: 9wt%, Sn: 6wt%), alloy state (cold rolled, deformation 90%), plate and strip width (850mm) and thickness (5mm), protective gas medium type (Ar gas), protective gas flow rate (30L / h), muffle furnace heating rate (20℃ / min), holding temperature (350℃), pulse current intensity (750A), voltage intensity (4V), pulse frequency (400Hz), edge and core temperature difference threshold (5℃), cooling medium (H2O), cooling method (water cooling), and coiling speed (100mm / min).

[0111] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0112] (3) Thermoelectric treatment (heat treatment system: 850℃ / 6h). Since the heat treatment system has only one temperature, only one furnace temperature is opened, and cooling water is injected into a cooling pool for quenching treatment. The specific process is as follows: Turn on the muffle furnace switch to start heating. After the furnace chamber temperature reaches 850℃, open the gas valve channel. After 10 minutes of ventilation, the PC control system adjusts the gear position in the power control system to the "pulse power" gear position, and issues parameter instructions (pulse current intensity is 130A, voltage intensity is 4V, pulse frequency is 400Hz) to perform pulse electric treatment on the plate and strip. At the same time, it issues instructions to the curling transmission system to start pulling and curling the plate and strip. The temperature of each area of ​​the material is monitored by the temperature measurement and control system, and the electrical signal is fed back to the PC control system in real time to ensure that the energy of the electric pulse treatment and the induction heating treatment is matched to control the temperature of the edge area and the temperature of the core area of ​​the material to be kept at ±10℃. When the plate and strip are drawn out of the thermoelectric treatment system and enter the cooling pool, the PC control system issues corresponding instructions to the cooling system to quench the plate and strip.

[0113] The performance indicators of the alloy plate and strip in this embodiment are as follows:

[0114] performance Heart Central Edge tensile strength 1424MPa 1415MPa 1428MPa hardness 392HV 388HV 386HV Elongation 8.0％ 7.8％ 8.1％ Electrical conductivity 16.8%IACS 16.6%IACS 16.7%IACS

[0115] Example 3

[0116] An intelligent online treatment method for strengthening and toughening a thermoelectric synergistic alloy, taking a Cu-Ni-Co-Si alloy as an example, comprises the following steps:

[0117] (1) Data entry. The initial information of the alloy plate and strip was first entered into the PC control system, including alloy system (Cu-1.1Ni-1.4Co-0.6Si), alloy composition (Cu: 96.9wt%, Ni: 1.1wt%, Co: 1.4wt%, Si: 0.6wt%), alloy state (cold rolled, deformation 90%), plate and strip width (1000mm) and thickness (3mm), protective gas medium type (Ar gas), protective gas flow rate (30L / h), muffle furnace heating rate (20℃ / min), holding temperature (900℃), pulse current intensity (130A), voltage intensity (6V), pulse frequency (600Hz), edge and core temperature difference threshold (5℃), cooling medium (H2O), cooling method (water cooling), and coiling speed (60mm / min).

[0118] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0119] (3) Thermoelectric treatment (heat treatment system: 900℃ / 4h). Since the heat treatment system has only one temperature, only one furnace temperature is opened, and cooling water is injected into a cooling pool for quenching treatment. The specific process is: turn on the muffle furnace switch to start heating, and open the gas valve channel after the furnace chamber temperature reaches 900℃. After ventilation for 10 minutes, the PC control system adjusts the gear position in the power control system to the "pulse power" gear position, and issues parameter instructions (pulse current intensity is 130A, voltage intensity is 6V, pulse frequency is 600Hz) to perform pulse electric treatment on the plate and strip. At the same time, an instruction is issued to the curling transmission system to start pulling and curling the plate and strip. The temperature of each area of ​​the material is monitored by the temperature measurement and control system, and the electrical signal is fed back to the PC control system in real time to ensure that the energy of the electric pulse treatment and the induction heating treatment is matched, so as to control the temperature of the edge area and the temperature of the core area of ​​the material to be kept at ±5℃. When the plate and strip are drawn out of the thermoelectric treatment system and enter the cooling pool, the PC control system issues a corresponding instruction to the cooling system to quench the plate and strip.

[0120] The performance indicators of the alloy plate and strip in this embodiment are as follows:

[0121] performance Heart Central Edge tensile strength 1424MPa 1415MPa 1428MPa hardness 392HV 388HV 386HV Elongation 8.0％ 7.8％ 8.1％ Electrical conductivity 16.8%IACS 16.6%IACS 16.7%IACS

[0122] Example 4

[0123] An intelligent online heat treatment method for strengthening and toughening a thermoelectric synergistic alloy, taking a Cu-Ni-Sn alloy as an example, comprises the following steps:

[0124] (1) Data entry. The initial information of the alloy plate and strip was first entered into the PC control system, including alloy system (Cu-15Ni-8Sn), alloy composition (Cu: 77wt%, Ni: 15wt%, Sn: 8wt%), alloy state (molten cast state), plate and strip width (600mm) and thickness (2mm), protective gas medium type (Ar gas), protective gas flow rate (30L / h), muffle furnace heating rate (20℃ / min), holding temperature (400℃), pulse current intensity (90A), voltage intensity (4V), pulse frequency (400Hz), edge and core temperature difference threshold (5℃), cooling medium (H2O), cooling method (water cooling), and coiling speed (60mm / min).

[0125] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0126] (3) Thermal electrical treatment (heat treatment system: 650℃ / 2h+720℃ / 2h+800℃ / 6h, gradient heat treatment followed by water cooling quenching). The specific process is as follows: turn on the muffle furnace switch to start heating, set multi-stage furnace chamber heating (first stage 650℃, second stage 720℃, third stage 800℃), open the gas valve channel after the furnace chamber temperature reaches 650℃, and after ventilation for 10 minutes, the PC control system adjusts the gear position in the power control system to the "pulse power" gear position, and issues parameter instructions (pulse current intensity of 140A, voltage intensity of 4V, pulse frequency of 600Hz) to perform pulse electrical treatment on the plate and strip, and at the same time issues instructions to the curling transmission system to start traction curling of the plate and strip, monitor the temperature of each area of ​​the material through the temperature measurement and control system, and feed back to the PC control system in real time in the form of electrical signals to ensure that the energy of the electric pulse treatment matches that of the induction heating treatment, so as to control the temperature of the edge area and the temperature of the core area of ​​the material to be kept at ±5℃. When the plate and strip material runs from the first section of the furnace chamber to the second section, the cooling systems of the first and second sections are closed, and at the same time, the PC control system issues parameter instructions (pulse current intensity is 150A, voltage intensity is 4V, pulse frequency is 600Hz) to perform pulse electrical treatment on the plate and strip material; when the plate and strip material runs to the third section, the PC control system issues parameter instructions (pulse current intensity is 160A, voltage intensity is 4V, pulse frequency is 600Hz) to perform pulse electrical treatment on the plate and strip material, and when it comes out of the third section of the furnace chamber, the PC control system issues corresponding instructions to the cooling system to quench the plate and strip material.

[0127] The performance indicators of the alloy plate and strip in this embodiment are as follows:

[0128]

[0129]

[0130] Comparative Example 1

[0131] The other conditions of this comparative example are the same as those of Example 1, except that the pulse electrical treatment in the temperature-electricity coordinated treatment is turned off, and only the traditional heat treatment method is used. Taking the Cu-Ni-Sn alloy as an example, the following steps are included:

[0132] (1) Data entry. The initial information of the alloy plate and strip was first entered into the PC control system, including the alloy system (Cu-15Ni-8Sn), alloy composition (Cu: 77wt%, Ni: 15wt%, Sn: 8wt%), alloy state (cold rolled, deformation 90%), plate and strip width (600mm) and thickness (2mm), protective gas medium type (Ar gas), protective gas flow rate (30L / h), muffle furnace heating rate (20℃ / min), holding temperature (400℃), cooling medium (H2O), cooling method (water cooling), and coiling speed (60mm / min).

[0133] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0134] (3) Thermoelectric treatment. Turn on the muffle furnace switch to start heating. When the furnace chamber temperature reaches 400°C, open the gas valve channel. After ventilation for 10 minutes, send a command to the curling transmission system to start pulling and curling the plate and strip. When the plate and strip are led out of the thermoelectric treatment system, the PC control system sends a corresponding command to the cooling system to quench the plate and strip.

[0135] The performance indicators of the alloy plate and strip in this embodiment are as follows:

[0136] performance Heart Central Edge tensile strength 1568MPa 1442MPa 1266MPa hardness 422HV 396HV 343HV Elongation 7.6％ 8.9％ 12.1％ Electrical conductivity 10.8%IACS 8.3%IACS 6.9%IACS

[0137] Comparative Example 2

[0138] The other conditions of this comparative example are the same as those of Example 1, except that the traditional heat treatment in the temperature-electricity coordinated treatment is turned off, and only the pulsed electrical treatment method is used. Taking the Cu-Ni-Sn alloy as an example, the following steps are included:

[0139] (1) Data entry. The initial information of the alloy plate and strip was first entered into the PC control system, including alloy system (Cu-15Ni-8Sn), alloy composition (Cu: 77wt%, Ni: 15wt%, Sn: 8wt%), alloy state (cold rolled, deformation 90%), plate and strip width (600mm) and thickness (2mm), shielding gas medium type (Ar gas), shielding gas flow rate (30L / h), pulse current intensity (90A), voltage intensity (4V), pulse frequency (400Hz), cooling medium (H2O), cooling method (water cooling), and coiling speed (60mm / min).

[0140] (2) Material preparation. Place the material (alloy plate, strip, wire, bar) on the unwinding mechanism of the traditional coiling system, and use the chain tooling in the chain transmission mechanism to fix one end of the chain tooling to the front end of the material in a "three-beam-in-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to connect to the coiling mechanism in a "one-beam-in-one" manner.

[0141] (3) Thermoelectric treatment. Open the air valve channel and ventilate for 10 minutes. The PC control system adjusts the gear position of the power control system to the "pulse power" gear position and issues parameter instructions (pulse current intensity is 90A, voltage intensity is 4V, pulse frequency is 400Hz) to perform pulse electrical treatment on the plate and strip. At the same time, it issues instructions to the curling transmission system to start pulling and curling the plate and strip. The temperature of each area of ​​the material is monitored through the temperature measurement and control system, and the electrical signal is fed back to the PC control system in real time. When the plate and strip are drawn out of the thermoelectric treatment system, the PC control system issues corresponding instructions to the cooling system to quench the plate and strip.

[0142] The performance indicators of the alloy plate and strip in this embodiment are as follows:

[0143] performance Heart Central Edge tensile strength 1588MPa 1026MPa 942MPa hardness 428HV 368HV 312HV Elongation 7.4％ 10.9％ 13.1％ Electrical conductivity 10.9%IACS 7.1%IACS 6.2%IACS

Claims

1. An intelligent online heat treatment device for strengthening and toughening thermoelectric synergistic alloy, characterized by: The online processing device includes a curling transmission system, a thermoelectric processing system, and a cooling system; The temperature-electric treatment system is composed of a heating furnace and a current conveying device. The heating furnace is provided with M sections of furnace, and any section of the furnace is independently temperature-controlled. The current conveying device includes M groups of current conveying electrodes, and any group of current conveying electrodes includes a first current conveying electrode and a second current conveying electrode. The first current conveying electrode and the second current conveying electrode are respectively arranged at the two ends of any section of the furnace, and when working, they are overlapped in the middle of the width direction of the metal material to be processed. The cooling system includes M cooling pools; the furnace and the cooling pools are alternately distributed; M is 1 to 6; The coiling transmission system comprises an uncoiling mechanism, a chain transmission mechanism and a coiling mechanism; the uncoiling mechanism is used to place a coil of metal material to be processed and uncoil the coil. After uncoiling, the metal material to be processed is driven by the chain transmission mechanism and passes through the furnace and the cooling pool alternately in sequence, and finally communicates with the coiling mechanism and is coiled by the coiling mechanism.

2. According to claim 1, an intelligent online heat treatment device for strengthening and toughening thermoelectric synergistic alloys is characterized by: The furnace body of the heating furnace comprises a furnace shell, a furnace shell bracket, a furnace lining, a furnace door, a bottom frame, a thermal insulation layer, and a refractory layer. The furnace shell adopts an upper and lower opening and closing structure and adopts a full fiber cotton ceiling structure; the furnace shell is formed by bending a stainless steel plate and then welded and provided with a well-shaped reinforcing rib; a refractory layer and a thermal insulation layer are sequentially arranged between the furnace shell and the furnace lining from the inside to the outside, wherein the refractory layer is built with aluminum shaped bricks, and the thermal insulation layer is made of high-temperature resistant ceramic fiber cotton; a heating pipe for heating is arranged in the furnace lining, and the opening and closing degree of the furnace door is adjustable; The cross section of any section of the furnace of the heating furnace is D-shaped, and the bottom adopts a corrugated structure; The cross-sectional dimensions of the furnace of the heating furnace are 100-800 mm×1-30 mm; Each furnace section in the heating furnace is independently temperature controlled by SCR+PID; The front section and the rear section of the heating furnace are equipped with heating pipe thermal directional expansion devices.

3. An intelligent online heat treatment device for strengthening and toughening thermoelectric synergistic alloy according to claim 1 or 2, characterized in that: The total length of the M-section furnace is 500-3000 mm, the operating temperature is 25-1300° C., and the heating rate is 10-150° C. / min; The total length of the M cooling pools is 500-3000 mm, and the cross-sectional dimensions are 100-800 mm x 1-30 mm; The cooling medium of any cooling pool is transported by dual pipelines and output by single pipeline.

4. The intelligent online heat treatment device for strengthening and toughening the thermoelectric synergistic alloy according to claim 1 or 2, characterized in that: The conventional coiling system further comprises a frame, which is used to fix the uncoiling mechanism, the coiling mechanism and the chain transmission mechanism. The frame is made of stainless steel, and the components on the frame are insulated; The unwinding mechanism adopts a vertical expansion and contraction unwinding method. The coil is placed vertically on the expansion and contraction reel. After being tensioned by the expansion and contraction reel, the motor with a magnetic powder clutch drives the expansion and contraction reel to rotate, driving the coil to unwind. The unwinding speed of the unwinding mechanism is 0-30m / min. The winding speed of the winding mechanism is 0-30m / min; The curling transmission system also includes rollers, which are divided into several groups and installed below the furnace support of the heating furnace and below the cooling pool support of the cooling system. The rollers are driven to rotate through a chain transmission mechanism, so that the metal materials to be processed can be controlled to run.

5. The intelligent online heat treatment device for strengthening and toughening thermoelectric synergistic alloy according to claim 1 or 2, characterized in that: The online processing device also includes a PC control system, which includes a high-performance computer device, a PID closed-loop control device, and a system emergency stop device; The online processing device further comprises a power supply control system, which comprises an output power supply, a three-phase controller, and a transformer; the output power supply is selected from one of a pulse power supply, a DC power supply, and an AC power supply; The online processing device also includes an electrical control system, which includes a cabinet, an air switch, a temperature control meter, a voltmeter, an ammeter, and a speed regulator; The online processing device further comprises a temperature measurement and control system, which comprises temperature measuring elements, which are distributed in the furnace of the heating furnace in three zones of "upper, middle and lower", and each zone is separated by no less than 100 mm; the number of temperature measuring elements in any section of the furnace is 3 to 6, and the temperature measuring elements are selected from infrared thermometers and / or thermocouple wires; The online processing device also includes a gas protection system, which includes two gas circuit devices, a pressure reducing valve, a pressure gauge, a pressure flow regulator and a flow meter.

6. An intelligent online heat treatment method for strengthening and toughening thermoelectric synergistic alloy, characterized in that: The online processing device described in any one of claims 1 to 5 is used to place the coil formed by the metal material to be processed on the uncoiling mechanism. After uncoiling, the metal material to be processed is driven by the chain transmission mechanism to alternately pass through the furnace for temperature and electricity coordinated treatment, pass through the cooling pool for cooling treatment, and finally connected to the coiling mechanism and coiled by the coiling mechanism. During the temperature-electricity coordinated treatment, the metal material is heated by a heating furnace, and a current is applied to the metal material by a current conveying device, so that the temperature difference between the edge area temperature and the core area temperature of the metal material is controlled to be ±(5-10)°C during the temperature-electricity coordinated treatment; The metal material to be processed alternately passes through the furnace for temperature-electric coordinated treatment and passes through the cooling pool for cooling treatment. According to the heat treatment system of the metal material to be processed, the temperature of each furnace section and the cooling medium transportation of each cooling pool section are independently set.

7. The intelligent online heat treatment method for strengthening and toughening the thermoelectric synergistic alloy according to claim 5 is characterized by: The metal material is selected from any one of copper alloy, titanium alloy, magnesium alloy, aluminum alloy and iron alloy; The shape of the metal material is selected from a plate, strip, bar, wire, tube, or special-shaped material; the width of the metal material is in the range of 0 to 1000 mm; Before the unwinding mechanism unwinds, the initial information of the metal material and the instruction parameter information are first input into the PC control system; After the coil of metal material to be processed is placed on the unwinding mechanism, one end of the chain tooling in the chain transmission mechanism is fixed to the front end of the metal material in a "three-bundle-one" manner, and the other end passes through the temperature-charging electrical treatment system and the cooling system to be connected to the curling mechanism in a "one-bundle-one" manner.

8. The intelligent online heat treatment method for strengthening and toughening the thermoelectric synergistic alloy according to claim 5, characterized in that: The PC control system sends command parameters to the power control system, electrical control system, curling transmission system, temperature and electricity processing system, gas protection system, and cooling system. After the furnace temperature of the heating furnace reaches the command temperature and the furnace body is filled with protective gas, the temperature and electricity coordinated processing begins; the command parameters include curling speed, protective gas type, gas flow, heating furnace heating speed, insulation temperature, current parameters, voltage intensity, cooling medium, cooling method, and cooling speed; During the temperature-electricity coordinated treatment process, the temperature of each area of ​​the metal material is monitored by the temperature measurement and control system, and the electric signal is fed back to the PC control system in real time to ensure that the current applied to the metal material matches the energy of the heating furnace treatment, so as to control the temperature difference between the edge area temperature and the core area temperature of the metal material to be ±(5-10)°C.

9. The intelligent online heat treatment method for strengthening and toughening the thermoelectric synergistic alloy according to claim 5, characterized in that: The unwinding speed of the unwinding mechanism and the winding speed of the winding mechanism are 0.01 to 1 m / min; During the thermoelectric coordinated treatment process, the temperature of the furnace of the heating furnace ranges from 25 to 1300° C., and the heating rate is 10 to 150° C. / min. The type of current applied to the metal material by the current conveying device is selected from direct current, alternating current, constant current, and pulse current. During the thermoelectric coordinated treatment, a current conveying device is used to apply a current with a density of 10 4 ~10 6 A / cm 2 .

10. The intelligent online heat treatment method for strengthening and toughening the thermoelectric synergistic alloy according to claim 5, characterized in that: The thermal and electrical coordinated treatment process is carried out under the protection of a protective gas, and the flow rate of the protective gas is 0.1 to 20 L / h; During the cooling treatment, the cooling medium used is selected from one of inert gas, water, oil and salt.

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