Ultrahigh-strength plastic isomer low-density steel, preparation method and processing equipment thereof

Abstract

The application discloses a kind of superhigh strength plastic isomer low-density steel, preparation method and its processing equipment, it is related to low-density steel preparation field, first step, alloy raw materials are according to component ratio and are vacuum smelting and casting, and get ingot;Second step, the ingot is carried out high-temperature homogenization treatment, and furnace cooling is cooled to room temperature;Third step, the ingot after cooling is preheated and is processed by forging process, and is cooled to room temperature again in air, and get forging bar;Fourth step, the forging bar is heated and rolled after being kept warm by heat preservation device;Fifth step, directly cold-rolled after water cooling;Sixth step, annealing treatment is carried out, and water cooling is cooled to room temperature, and get finished product low-density steel.The application does not need additional aging treatment and the addition of expensive alloy elements, in addition, by simply adjusting annealing condition, the mechanical properties of steel can be regulated according to specific application requirements, and good process adaptability and application potential are fully shown.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-density steel preparation, in particular to a super-high strength and plastic isomerism low-density steel, a preparation method and processing equipment thereof. BACKGROUND

[0002] In view of the urgent needs of modern industry for high performance and lightweight of materials, especially in the fields of automobiles and aerospace, in order to improve fuel efficiency, reduce emissions and enhance safety, super-high strength and low-density steel has attracted much attention due to its high strength and low density characteristics.

[0003] In the prior art, in order to improve the structural strength and lightweight of steel, other expensive alloy elements are generally added to the existing steel material or additional aging treatment is required, which increases the cost and time of use, and needs to be improved.

[0004] Therefore, it is necessary to provide a super-high strength and plastic isomerism low-density steel, a preparation method and processing equipment thereof to solve the above problems. SUMMARY

[0005] The present application aims to provide a super-high strength and plastic isomerism low-density steel, a preparation method and processing equipment thereof, to solve the problem that in the prior art, in order to improve the structural strength and lightweight of steel, other expensive alloy elements are generally added to the existing steel material or additional aging treatment is required, which increases the cost and time of use, and needs to be improved.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a preparation method of a super-high strength and plastic isomerism low-density steel, comprising the following steps:

[0007] Firstly, alloy raw materials are vacuum smelted and cast according to the component ratio to obtain ingots;

[0008] Secondly, the ingots are subjected to homogenization treatment at a high temperature of 1050℃ and cooled to room temperature in the furnace;

[0009] Thirdly, the cooled ingots are preheated and subjected to forging process treatment, and then cooled to room temperature in the air to obtain a forged bar;

[0010] Fourthly, the forged bar is subjected to heat rolling treatment after being kept at 950℃ by a heat preservation device, with a deformation of 67%, to form a slab, which is then water-cooled to room temperature;

[0011] Fifthly, the water-cooled slab is directly cold-rolled with a deformation of 42%;

[0012] Sixthly, the cold-rolled slab is subjected to annealing treatment at 900℃ and then water-cooled to room temperature to obtain a finished low-density steel;

[0013] The finished low-density steel, based on a total mass of 100%, has the following chemical composition and mass percentage: Mn 20%, Al 8%, C 0.8%, and Fe 71.2%.

[0014] This invention also discloses a processing equipment for ultra-high strength, plastic heterogeneous low-density steel, including a heat preservation device. The heat preservation device includes a heat preservation heating furnace. A central groove is provided in the middle of the bottom end of the heat preservation heating furnace. Multiple circular grooves are provided on both sides of the central groove. The multiple circular grooves are all provided on the heat preservation heating furnace. A cylinder is rotatably connected inside the multiple circular grooves. An opening is provided at the top of the cylinder. The multiple circular grooves penetrate through the other side of the heat preservation heating furnace. A drive mechanism is telescopically provided on the other side of the heat preservation heating furnace. The drive mechanism is connected to the cylinder. Multiple electric heating tubes are fixed inside the heat preservation heating furnace.

[0015] A discharge trough is provided between the circular trough and the intermediate trough. A rolling channel is opened on the same side of the multiple circular troughs. The rolling channel is connected to the discharge trough. One side of the bottom of the discharge trough is connected to the intermediate trough. Multiple buffer plates are rotatably connected to the inner wall of the discharge trough.

[0016] Preferably, the driving mechanism includes a U-shaped sliding frame, with the U-shaped opening of the U-shaped sliding frame facing the heat preservation furnace. The heat preservation furnace has telescopic grooves for the two ends of the U-shaped sliding frame to slide out. A spring is fixed inside the telescopic groove, and one end of the spring is fixedly connected to the end of the corresponding U-shaped sliding frame.

[0017] Preferably, multiple motors are fixed on the side of the U-shaped sliding frame away from the heat preservation furnace, and the drive shafts of the multiple motors are fixedly connected to the center of one end of the corresponding cylinder. An electric push rod is fixed between the side of the U-shaped sliding frame near the heat preservation furnace and the heat preservation furnace.

[0018] Preferably, multiple buffer plates are rotatably connected to the inner wall of the feeding trough via a rotating shaft, and the multiple buffer plates are staggered at equal intervals along the height direction of the feeding trough. Sandpaper is fixed on the upper surface of the multiple buffer plates, and the ends of the multiple buffer plates away from the feeding trough are inclined downwards.

[0019] Preferably, the bottom of the heat preservation heating furnace is fixed with support legs on both sides, and a support plate is fixed between the two support legs. A collection box is placed on the support plate, and a first temperature sensor is embedded in the inner wall of the collection box.

[0020] Preferably, a second temperature sensor is installed inside each of the multiple cylinders, and the end of each cylinder away from the U-shaped sliding frame extends out of the corresponding circular groove, and the extended end is connected to a heat-insulating baffle.

[0021] Preferably, the top of the heat-insulating heating furnace is provided with a heat exhaust pipe, the top of the feeding trough is connected to an output pipe, the top of the output pipe is connected to the heat exhaust pipe, and a solenoid valve is provided at the connection between the output pipe and the heat exhaust pipe.

[0022] Preferably, the end of the rolling channel near the discharge trough is inclined downwards.

[0023] The present invention also discloses an ultra-high strength and ductile heterogeneous low-density steel.

[0024] The technical effects and advantages of this invention are as follows:

[0025] 1. Through homogenization, hot forging, hot rolling, cold rolling, and annealing, the B2 phase is made to appear as discontinuous strips or dispersed distribution in a fine-grained austenite matrix, resulting in a heterogeneous reinforced structure with a matching softness and hardness. In this structure, multiple strengthening mechanisms such as fine-grain strengthening, B2 precipitation strengthening, and heterogeneous strain hardening and strengthening work together and reinforce each other, forming a multi-scale heterogeneous mixed strengthening, thereby significantly improving the strength and plasticity of the material. This invention does not require additional aging treatment or the addition of expensive alloying elements. In addition, by simply adjusting the annealing conditions, the mechanical properties of the steel can be controlled according to specific application requirements, fully demonstrating good process adaptability and application potential.

[0026] 2. Multiple cylinders can be driven by a drive mechanism to extend out of their corresponding slots. At this time, the openings of the cylinders are set upwards, making it easy for personnel to put the forging rods into the cylinders through the openings. The drive mechanism drives the multiple cylinders to retract into the slots, completing the closure. This allows the electric heating tube to heat and keep the multiple forging rods in place. Each forging rod is placed separately, so they will not affect each other and will not pile up, causing incomplete heating in the piled-up areas.

[0027] 3. By starting multiple motors, the cylinder is driven to rotate in the corresponding circular groove, which facilitates the heating of the forged bars inside the cylinder at a fixed angle, making the heating more uniform. Furthermore, after the heat preservation is completed, the motor drives the opening of the cylinder to rotate to the rolling channel. The forged bars inside the cylinder are automatically rolled into the discharge trough by their own gravity, completing the automatic output of the forged bars. At the same time, by starting a single motor, the forged bars in the corresponding cylinder can be output individually.

[0028] 4. In the actual operation of this invention, when the forging rod inside the cylinder falls from the inside of the feeding groove, the forging rod will contact the corresponding buffer plate, thereby slowing down the falling speed of the forging rod. The forging rod will also contact the sandpaper on the upper surface of the buffer plate. The sandpaper will rub the outer surface of the forging rod, thereby removing impurities that adhered during heating and heat preservation or in the previous process, making the surface smoother. At the same time, the friction of the sandpaper will also slow down the rolling speed of the forging rod, thereby reducing the impact force.

[0029] 5. The staggered buffer plates can prevent multiple forging bars from colliding with each other when they are discharged at the same time, thus avoiding breakage caused by the impact. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the process flow for preparing ultra-high strength and ductile heterogeneous low-density steel according to the present invention.

[0031] Figure 2 The images show the stress-strain curves and tensile fracture morphology SEM images of engineering embodiments of the present invention.

[0032] Figure 3 This is a schematic diagram of the structure of the heat preservation heating furnace of the present invention.

[0033] Figure 4 This is a schematic diagram of the structure of the motor of the present invention.

[0034] Figure 5 This is a schematic diagram of the U-shaped sliding frame of the present invention.

[0035] Figure 6 This is a schematic diagram of the material rolling channel of the present invention.

[0036] Figure 7 This is a schematic diagram of the material feeding trough of the present invention.

[0037] Figure 8 For the present invention Figure 5 Enlarged diagram of point A in the middle.

[0038] Figure 9 This is a schematic diagram of X-ray diffraction in this invention.

[0039] Figure 10 This is the EBSD phase diagram of the present invention.

[0040] In the diagram: 1. Insulation heating furnace; 2. Heat exhaust pipe; 3. Circular groove; 4. Cylinder; 5. Opening; 6. Insulation baffle; 7. Intermediate groove; 8. Support leg; 9. Support plate; 10. Collection box; 11. Spring; 12. U-shaped sliding frame; 13. Electric push rod; 14. Motor; 15. Rolling material channel; 16. Discharge chute; 17. Buffer plate; 18. Sandpaper; 19. Output pipe; 20. Solenoid valve; 21. Electric heating tube; 22. Telescopic groove. Detailed Implementation

[0041] This invention provides, for example Figures 1-10 The method for preparing ultra-high strength and ductile heterogeneous low-density steel shown includes the following steps:

[0042] S1. The alloy raw materials are vacuum smelted and cast according to the component ratio to obtain ingots;

[0043] S2. The ingot is subjected to a high-temperature homogenization treatment at 1050°C and then cooled to room temperature in the furnace.

[0044] S3. The cooled ingot is preheated and forged, and then cooled to room temperature in air to obtain a forged bar.

[0045] S4. After the forging bar is kept at 950°C by a heat preservation device, it is hot rolled with a deformation of 67% to form a slab, and then cooled to room temperature by water.

[0046] S5. The water-cooled slab is directly cold-rolled, with a deformation of 42%.

[0047] S6. Anneal the cold-rolled slab at 900℃ and cool it to room temperature with water to obtain the finished low-density steel.

[0048] The total mass of the finished low-density steel is 100%, and its chemical composition and mass percentage are as follows: Mn 20%, Al 8%, C 0.8%, Fe 71.2% (which includes unavoidable impurities, which are not specified due to their low content).

[0049] The present invention also discloses an ultra-high strength and ductile heterogeneous low-density steel, which is produced using the above-mentioned method for preparing ultra-high strength and ductile heterogeneous low-density steel.

[0050] Through homogenization, hot forging, hot rolling, cold rolling, and annealing, the B2 phase is made to appear as discontinuous strips or dispersed in the fine-grained austenite matrix, resulting in a heterogeneous reinforced structure with a matching softness and hardness. In this structure, multiple strengthening mechanisms such as fine-grain strengthening, B2 precipitation strengthening, and heterogeneous strain hardening and strengthening work together and reinforce each other, forming a multi-scale heterogeneous mixed strengthening, thereby significantly improving the strength and plasticity of the material.

[0051] The low-density steel in this invention exhibits excellent comprehensive performance, as shown in Table 1 below.

[0052] Table 1

[0053]

[0054] The low-density steel achieves an ultra-high strength level with a yield strength of 1400 MPa and a tensile strength of 1700 MPa, while maintaining an elongation of over 45% and a density of approximately 7.0 g / cm³. 3 Compared to ordinary steel, this method achieves a weight reduction of up to 10.5%, making it suitable for manufacturing automotive parts. It can significantly reduce the weight of vehicles, enabling lighter construction and expanding its application range. This invention requires no additional aging treatment or the addition of expensive alloying elements. Furthermore, by simply adjusting the annealing conditions, the mechanical properties of the steel can be controlled according to specific application requirements, fully demonstrating its excellent process adaptability and application potential.

[0055] Figure 2 The engineering stress-strain curves and tensile fracture morphology SEM images, as exemplary embodiments of the present invention, are derived from... Figure 2 It can be seen that the stress-strain curve has no obvious yield plateau, exhibiting continuous yield deformation and high plastic deformation capacity. The SEM image of the tensile fracture morphology shows that the fracture surface lacks metallic luster, has a darker gray color, and is composed of several dimples, which is characteristic of ductile fracture. This indicates that the low-density steel of this invention has good plasticity.

[0056] X-ray diffraction (XRD) (such as...) Figure 9 (as shown) and electron backscattering diffraction (EBSD phase diagram - Figure 10 The diagram shows a biphase microstructure consisting of 81.9% face-centered cubic (FCC) γ-austenite and 16.5% body-centered cubic (BCC) B2 phase.

[0057] The unique microstructure of the example sample includes refined recrystallized austenite grains, discontinuous banded B2 phase, and a dispersed B2 phase, forming a multi-layered, multi-dimensional heterogeneous reinforcement structure. In this structure, reinforcements of different scales interact and synergistically combine the effects of grain refinement strengthening, B2 precipitation strengthening, and heterogeneous strain hardening and strengthening, resulting in multi-scale heterogeneous hybrid strengthening. This significantly improves both strength and plasticity without requiring additional aging treatment or the addition of expensive alloying elements. Furthermore, by simply adjusting the annealing conditions, the mechanical properties of the steel can be controlled according to specific application requirements, demonstrating excellent process adaptability and application potential.

[0058] The present invention also discloses a processing equipment for ultra-high strength, plasticity, heterogeneous low-density steel, including a heat preservation device. The heat preservation device includes a heat preservation heating furnace 1. The heat preservation heating furnace 1 is applied to the fourth step of the preparation method of ultra-high strength, plasticity, heterogeneous low-density steel of the present invention, and is used to heat the forging rod to keep the forging rod at 950°C, so as to facilitate subsequent hot rolling treatment and avoid the forging rod losing temperature.

[0059] A central groove 7 is provided at the bottom center of the heat preservation heating furnace 1. Multiple circular grooves 3 are provided on both sides of the central groove 7. The multiple circular grooves 3 are all provided on the heat preservation heating furnace 1. A cylinder 4 is rotatably connected inside the multiple circular grooves 3. An opening 5 is provided at the top of the cylinder 4. The multiple circular grooves 3 penetrate through the other side of the heat preservation heating furnace 1. A drive mechanism is provided on the other side of the heat preservation heating furnace 1. The drive mechanism is connected to the cylinder 4. Multiple electric heating tubes 21 are fixed inside the heat preservation heating furnace 1. It should be noted that the multiple electric heating tubes 21 are distributed around the outer side of the corresponding circular grooves 3.

[0060] Multiple cylinders 4 can be driven by a drive mechanism to extend out of the corresponding circular grooves 3. At this time, the openings 5 ​​of the cylinders 4 are set upwards, making it easy for personnel to put the forging rods into the inside of the cylinders 4 through the openings 5. The drive mechanism drives multiple cylinders 4 to retract into the circular grooves 3, completing the closure. This allows the electric heating tubes 21 to heat and keep the multiple forging rods in place. Each forging rod is placed separately, so they will not affect each other and will not pile up together, causing incomplete heating in the piled-up area of ​​the forging rods.

[0061] Specifically, the driving mechanism includes a U-shaped sliding frame 12, with the U-shaped opening of the U-shaped sliding frame 12 facing the heat preservation furnace 1. The heat preservation furnace 1 has a telescopic groove 22 for the two ends of the U-shaped sliding frame 12 to slide out. A spring 11 is fixed inside the telescopic groove 22. One end of the spring 11 is fixedly connected to the end of the corresponding U-shaped sliding frame 12. Multiple motors 14 are fixed on the side of the U-shaped sliding frame 12 away from the heat preservation furnace 1. The drive shafts of the multiple motors 14 are fixedly connected to the center of one end of the corresponding cylinder 4. An electric push rod 13 is fixed between the side of the U-shaped sliding frame 12 close to the heat preservation furnace 1 and the heat preservation furnace 1.

[0062] In the actual operation of the present invention, by driving the electric push rod 13, the electric push rod 13 is retracted, thereby bringing the U-shaped sliding frame 12 closer to the heat preservation heating furnace 1, so that both ends of the U-shaped sliding frame 12 slide into the heat preservation heating furnace 1, so that one end of the cylinder 4 can extend out of the corresponding circular groove 3, which is convenient for taking the forging rod into the cylinder 4 or taking out the forging rod inside the cylinder 4.

[0063] Furthermore, by starting multiple motors 14, the cylinder 4 can be driven to rotate within the corresponding circular groove 3, thereby facilitating the heating of the forged bars within the cylinder 4 at a fixed angle, resulting in more uniform heating. Moreover, after the heat preservation is completed, the motor 14 drives the opening 5 of the cylinder 4 to rotate to the rolling channel 15. Under the action of its own gravity, the forged bars inside the cylinder 4 automatically roll through the rolling channel 15 into the discharge trough 16, completing the automatic output of the forged bars. At the same time, by starting a single motor 14, the forged bars in the corresponding cylinder 4 can be output independently.

[0064] The end of the rolling channel 15 near the discharge trough 16 is inclined downwards to facilitate the rolling discharge of the forging bar through the inclined angle.

[0065] A discharge trough 16 is provided between the circular trough 3 and the intermediate trough 7. A rolling channel 15 is opened on the same side of the multiple circular troughs 3. The rolling channel 15 is connected to the discharge trough 16. One side of the bottom of the discharge trough 16 is connected to the intermediate trough 7. Multiple buffer plates 17 are rotatably connected to the inner wall of the discharge trough 16. The multiple buffer plates 17 are rotatably connected to the inner wall of the discharge trough 16 through a rotating shaft. A torsion spring is provided on the rotating shaft. The multiple buffer plates 17 are evenly distributed and staggered along the height direction of the discharge trough 16. Sandpaper 18 is fixed on the upper surface of the multiple buffer plates 17. The end of the multiple buffer plates 17 away from the discharge trough 16 is inclined downward.

[0066] In the actual operation of this invention, when the forging rod inside the cylinder 4 falls from the inside of the feeding groove 16, the forging rod will come into contact with the corresponding buffer plate 17, thereby slowing down the falling speed of the forging rod. The forging rod also comes into contact with the sandpaper 18 on the upper surface of the buffer plate 17. The sandpaper 18 will rub the outer surface of the forging rod, thereby removing impurities that adhered during heating and heat preservation or in the previous process, making the surface smoother. At the same time, the friction of the sandpaper 18 will also slow down the rolling speed of the forging rod, thereby reducing the impact force.

[0067] The staggered buffer plates 17 can prevent the mutual collisions that occur when multiple forging bars are discharged at the same time, thus avoiding the breakage caused by the impact of the forging bars.

[0068] Support legs 8 are fixed on both sides of the bottom of the heat preservation heating furnace 1. A support plate 9 is fixed between the two support legs 8. A collection box 10 is placed on the support plate 9. The collection box 10 can automatically collect the forging bars discharged from the feeding trough 16. A first temperature sensor is embedded in the inner wall of the collection box 10 to monitor the temperature of the forging bars stored in the collection box 10 in real time.

[0069] Each of the multiple cylinders 4 is equipped with a second temperature sensor. The end of the multiple cylinders 4 away from the U-shaped sliding frame 12 extends out of the corresponding circular groove 3, and the extended end is connected to the heat insulation baffle 6. The second temperature sensor is used to monitor the temperature inside the cylinder 4 and check whether the appropriate temperature has been reached.

[0070] The top of the heat-insulating heating furnace 1 is equipped with a heat exhaust pipe 2, and the top of the feeding trough 16 is connected to an output pipe 19. The top of the output pipe 19 is connected to the heat exhaust pipe 2. A solenoid valve 20 is installed at the connection between the output pipe 19 and the heat exhaust pipe 2. Excess heat can be discharged from the heat exhaust pipe 2 by controlling the opening of the solenoid valve 20.

Claims

1. A method for preparing ultra-high strength and ductile heterogeneous low-density steel, characterized in that, Includes the following steps: S1. The alloy raw materials are vacuum smelted and cast according to the component ratio to obtain ingots; S2. The ingot is subjected to a high-temperature homogenization treatment at 1050°C and then cooled to room temperature in the furnace. S3. The cooled ingot is preheated and forged, and then cooled to room temperature in air to obtain a forged bar. S4. After the forging bar is kept at 950°C by a heat preservation device, it is hot rolled with a deformation of 67% to form a slab, and then cooled to room temperature by water. S5. The water-cooled slab is directly cold-rolled, with a deformation of 42%. S6. Anneal the cold-rolled slab at 900℃ and cool it to room temperature with water to obtain the finished low-density steel. The finished low-density steel, based on a total mass of 100%, has the following chemical composition and mass percentage: Mn 20%, Al 8%, C 0.8%, and Fe 71.2%.

2. A processing equipment for ultra-high strength, high-performance, heterogeneous, low-density steel, characterized in that: The method for preparing ultra-high strength plastic heterogeneous low-density steel as described in claim 1 also includes a heat preservation device, the heat preservation device including a heat preservation heating furnace (1), the heat preservation heating furnace (1) has a middle groove (7) at the bottom center, and multiple circular grooves (3) are provided on both sides of the middle groove (7). The multiple circular grooves (3) are all opened on the heat preservation heating furnace (1), and a cylinder (4) is rotatably connected inside the multiple circular grooves (3). An opening (5) is opened at the top of the cylinder (4). The multiple circular grooves (3) penetrate through the other side of the heat preservation heating furnace (1), and a drive mechanism is telescopically provided on the other side of the heat preservation heating furnace (1). The drive mechanism is connected to the cylinder (4), and multiple electric heating tubes (21) are fixed inside the heat preservation heating furnace (1). A discharge trough (16) is provided between the circular groove (3) and the intermediate groove (7). A rolling channel (15) is provided on the same side of the multiple circular grooves (3). The rolling channel (15) is connected to the discharge trough (16). One side of the bottom of the discharge trough (16) is connected to the intermediate groove (7). Multiple buffer plates (17) are rotatably connected to the inner wall of the discharge trough (16).

3. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 2, characterized in that: The driving mechanism includes a U-shaped sliding frame (12), with the U-shaped opening of the U-shaped sliding frame (12) facing the heat preservation heating furnace (1). The heat preservation heating furnace (1) has a telescopic groove (22) for the two ends of the U-shaped sliding frame (12) to slide out. A spring (11) is fixed inside the telescopic groove (22), and one end of the spring (11) is fixedly connected to the end of the corresponding U-shaped sliding frame (12).

4. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 3, characterized in that: Multiple motors (14) are fixed on the side of the U-shaped sliding frame (12) away from the heat preservation heating furnace (1). The drive shafts of the multiple motors (14) are fixedly connected to the center of one end of the corresponding cylinder (4). An electric push rod (13) is fixed between the side of the U-shaped sliding frame (12) close to the heat preservation heating furnace (1) and the heat preservation heating furnace (1).

5. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 2, characterized in that: Multiple buffer plates (17) are rotatably connected to the inner wall of the feeding trough (16) via a rotating shaft. A torsion spring is provided on the rotating shaft. The multiple buffer plates (17) are distributed at equal intervals along the height direction of the feeding trough (16). Sandpaper (18) is fixed on the upper surface of the multiple buffer plates (17). The ends of the multiple buffer plates (17) away from the feeding trough (16) are inclined downwards.

6. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 2, characterized in that: The heat preservation heating furnace (1) has two support legs (8) fixed on both sides of its bottom end. A support plate (9) is fixed between the two support legs (8). A collection box (10) is placed on the support plate (9). A first temperature sensor is embedded in the inner wall of the collection box (10).

7. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 3, characterized in that: Each of the multiple cylinders (4) is equipped with a second temperature sensor. The end of each cylinder (4) away from the U-shaped sliding frame (12) extends out of the corresponding circular groove (3), and the extended end is connected to a heat-insulating baffle (6).

8. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 2, characterized in that: The top of the heat-insulating heating furnace (1) is provided with a heat exhaust pipe (2), the top of the feeding trough (16) is connected to an output pipe (19), the top of the output pipe (19) is connected to the heat exhaust pipe (2), and a solenoid valve (20) is provided at the connection between the output pipe (19) and the heat exhaust pipe (2).

9. The ultra-high strength, high-performance, heterogeneous, low-density steel processing equipment according to claim 2, characterized in that: The material rolling channel (15) is inclined downward at one end near the material feeding trough (16).

10. A type of ultra-high strength and ductile heterogeneous low-density steel, characterized in that: The steel is produced using the method for preparing ultra-high strength, ductile, heterogeneous, low-density steel as described in claim 1.

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