Ultrahigh-strength and ultrahigh-plasticity heterogeneous low-density steel, preparation method and processing equipment thereof

Abstract

The invention discloses ultrahigh-strength and ultrahigh-plasticity heterogeneous low-density steel, a preparation method and processing equipment thereof, and relates to the field of low-density steel preparation, the preparation method comprises the following steps: 1, carrying out vacuum smelting and casting on alloy raw materials according to a component proportion to obtain a cast ingot; secondly, the cast ingot is subjected to high-temperature homogenization treatment and cooled to the room temperature along with a furnace; thirdly, the cooled cast ingot is subjected to preheating and forging process treatment and cooled again in air to the room temperature, and a forged rod is obtained; fourthly, the forging rod is subjected to heat preservation through a heat preservation device and then subjected to hot rolling treatment; fifthly, the plate blank subjected to water cooling is directly subjected to cold rolling; and sixthly, annealing treatment is conducted, water cooling is conducted to the room temperature, and the finished low-density steel is obtained. According to the method, additional aging treatment and addition of expensive alloy elements are not needed, in addition, by simply adjusting annealing conditions, the mechanical property of the steel can be regulated and controlled according to specific application requirements, and good process adaptability and application potential are fully shown.

Description

Technical Field

[0001] The present invention relates to the field of low-density steel preparation, and in particular to an ultra-high-strength-plastic heterogeneous low-density steel, a preparation method and processing equipment thereof. Background Art

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

[0003] In order to improve the structural strength and lightness of steel materials in the prior art, other expensive alloy elements are generally added to the existing steel materials or additional aging treatment is required. This method will increase the cost and time of use and needs to be improved.

[0004] Therefore, it is necessary to propose an ultra-high strength-plastic heterogeneous low-density steel, a preparation method and processing equipment thereof to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an ultra-high strength plastic heterogeneous low-density steel, a preparation method and processing equipment thereof, so as to solve the problem that in the prior art, in order to improve the structural strength and lightness of steel materials, other expensive alloy elements are generally added to the existing steel materials or additional aging treatment is required, which will increase the cost and time of use and needs to be improved.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for preparing ultra-high strength and plastic heterogeneous low-density steel, comprising the following steps:

[0007] The first step is to vacuum smelt and cast the alloy raw materials according to the composition ratio to obtain an ingot;

[0008] The second step is to subject the ingot to a high temperature homogenization treatment at 1050° C. and then cool it to room temperature in the furnace;

[0009] The third step is to preheat and forge the cooled ingot, and cool it again to room temperature in air to obtain a forged rod;

[0010] Step 4: After the forged bar is kept at 950° C. by a heat preservation device, it is hot rolled with a deformation amount of 67% to form a slab, and then water-cooled to room temperature;

[0011] Step 5: directly cold-roll the water-cooled slab to a deformation amount of 42%;

[0012] Step 6: anneal the cold-rolled slab at 900°C and water-cool it to room temperature to obtain a finished low-density steel.

[0013] The total mass of the finished low-density steel is 100%, wherein the chemical components and their mass percentages are: Mn is 20%, Al is 8%, C is 0.8%, and Fe is 71.2%.

[0014] The present invention also discloses an ultra-high strength plastic heterogeneous low-density steel processing equipment, including a heat preservation device, the heat preservation device includes a heat preservation heating furnace, a middle groove is provided in the middle of the bottom end of the heat preservation heating furnace, a plurality of circular grooves are provided on both sides of the middle groove, the plurality of circular grooves are rotatably connected with cylinders, an opening is provided at the top of the cylinder, the plurality of circular grooves penetrate the other side of the heat preservation heating furnace, and a driving mechanism is telescopically provided on the other side of the heat preservation heating furnace, the driving mechanism is connected to the cylinder, and a plurality of electric heating tubes are fixed inside the heat preservation heating furnace;

[0015] A material discharge trough is arranged between the circular groove and the middle groove, a rolling channel is opened on the same side of the plurality of circular grooves, the rolling channel is connected to the material discharge trough, one side of the bottom end of the material discharge trough is connected to the middle groove, and a plurality of buffer plates are rotatably connected to the inner wall of the material discharge trough.

[0016] Preferably, the driving mechanism includes a U-shaped sliding frame, the U-shaped mouth of the U-shaped sliding frame is arranged toward the direction of the thermal insulation heating furnace, and the thermal insulation heating furnace is provided with a telescopic groove for the two ends of the U-shaped sliding frame to slide out, and 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, a plurality of motors are fixed on the side of the U-shaped sliding frame away from the insulation heating furnace, the driving shafts of the plurality of motors are fixedly connected to the center of one end of the corresponding cylinder, and an electric push rod is fixed on the side of the U-shaped sliding frame close to the insulation heating furnace and between the insulation heating furnace.

[0018] Preferably, multiple buffer plates are rotatably connected to the inner wall of the feed chute via a rotating shaft, and the multiple buffer plates are staggered and distributed at equal distances along the height direction of the feed chute, sandpaper is fixed on the upper surfaces of the multiple buffer plates, and the multiple buffer plates are arranged to be tilted downward away from one end of the feed chute.

[0019] Preferably, support legs are fixed on both sides of the bottom end of the thermal insulation heating furnace, 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 on the inner wall of the collection box.

[0020] Preferably, a second temperature sensor is disposed inside each of the plurality of cylinders, one end of the plurality of cylinders 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, a heat exhaust pipe is provided at the top of the thermal insulation heating furnace, an output pipe is connected to the top of the discharge chute, the top of the output pipe is connected to the heat exhaust pipe, and a solenoid valve is provided at the connection point between the output pipe and the heat exhaust pipe.

[0022] Preferably, one end of the rolling channel close to the feeding chute is inclined downward.

[0023] The present invention also discloses an ultra-high strength, plasticity, heterogeneous low-density steel, which is characterized in that it is produced using the ultra-high strength, plasticity, heterogeneous low-density steel preparation method as described in claim 1.

[0024] Technical effects and advantages of the present invention:

[0025] 1. Through homogenization, hot forging, hot rolling, cold rolling and annealing, the B2 phase is discontinuously striped or dispersed in the fine-grained austenite matrix, and a heterogeneous reinforced structure with matching softness and hardness is obtained. In this structure, various strengthening mechanisms such as fine grain strengthening, B2 precipitation strengthening, and heterogeneous strain hardening and strengthening cooperate with each other and strengthen each other to form multi-scale heterogeneous mixed strengthening, thereby greatly improving the strength and plasticity of the material. The present invention does not require additional aging treatment and the addition of expensive alloying elements. In addition, by simply adjusting the annealing conditions, the mechanical properties of the steel can be adjusted according to specific application requirements, fully demonstrating good process adaptability and application potential.

[0026] 2. The driving mechanism can be used to drive multiple cylinders to extend out of the corresponding circular grooves. At this time, the opening of the cylinder is set upward, which is convenient for personnel to put the forging rods into the cylinder through the opening. The driving mechanism drives the multiple cylinders to retract into the circular groove to complete the closing, so that the electric heating tube heats and keeps the multiple forging rods placed in it, and each forging rod is placed separately without affecting each other, and will not be piled up together, resulting in incomplete heating of the forging rod accumulation area.

[0027] 3. By starting multiple motors, the cylinder is driven to rotate in the corresponding circular groove, so that the forged rods in the cylinder are heated at a fixed angle and the heating is more uniform. Furthermore, after the insulation is completed, the motor drives the opening position of the cylinder to rotate to the rolling channel. The forged rods inside the cylinder are automatically rolled into the discharge trough through the rolling channel due to their own gravity, completing the automatic output of the forged rods. At the same time, by starting a certain motor alone, the output of the forged rods in the corresponding cylinder can be completed alone.

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

[0029] 5. The staggered buffer plates can avoid the collision of multiple forging bars when they are discharged at the same time, thus avoiding the breakage caused by the collision of forging bars. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 The engineering stress-strain curve and SEM image of the tensile fracture morphology of the embodiment of the present invention are shown.

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

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

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

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

[0036] Figure 7 It is a structural schematic diagram of the feed chute of the present invention.

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

[0038] Fig. 9 This is a schematic diagram of X-ray diffraction of the present invention.

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

[0040] In the figure: 1. Insulation heating furnace; 2. Heat exhaust pipe; 3. Round groove; 4. Cylinder; 5. Opening; 6. Insulation baffle; 7. Middle 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 channel; 16. Feed chute; 17. Buffer plate; 18. Sandpaper; 19. Output pipe; 20. Solenoid valve; 21. Electric heating tube; 22. Telescopic groove. DETAILED DESCRIPTION

[0041] The present invention provides Figures 1 to 10 The method for preparing ultra-high strength and plastic heterogeneous low-density steel shown comprises the following steps:

[0042] S1, vacuum smelting and casting the alloy raw materials according to the composition ratio to obtain an ingot;

[0043] S2, subjecting the ingot to a high temperature homogenization treatment at 1050° C., and then cooling the ingot to room temperature;

[0044] S3, preheating and forging the cooled ingot, and cooling it again to room temperature in air to obtain a forged rod;

[0045] S4, after the forged bar is kept at 950° C. by a heat preservation device, hot rolling is performed with a deformation amount of 67% to form a slab, and water-cooling is performed to room temperature;

[0046] S5, directly cold rolling the water-cooled slab to a deformation amount of 42%;

[0047] S6, annealing the cold-rolled slab at 900° C. and water-cooling it to room temperature to obtain a finished low-density steel;

[0048] The total mass of the finished low-density steel is 100%, wherein the chemical components and their mass percentages are: Mn is 20%, Al is 8%, C is 0.8%, and Fe is 71.2% (including inevitable impurities, which are not marked due to the low impurity content).

[0049] The present invention also discloses an ultra-high strength, plasticity, heterogeneous low-density steel, which is produced using the ultra-high strength, plasticity, heterogeneous low-density steel preparation method.

[0050] Through homogenization, hot forging, hot rolling, cold rolling and annealing, the B2 phase is made to be discontinuous strips or dispersedly distributed in the fine-grained austenite matrix, obtaining a heterogeneous reinforced structure with matching soft and hard properties. In this structure, various strengthening mechanisms such as fine grain strengthening, B2 precipitation strengthening, and heterogeneous strain hardening and strengthening work together and reinforce each other to form multi-scale heterogeneous mixed strengthening, thereby greatly improving the strength and plasticity of the material.

[0051] The low-density steel of the present invention exhibits excellent comprehensive properties, and various properties are shown in Table 1 below.

[0052] Table 1

[0053]

[0054] The low-density steel has a yield strength of 1400MPa and a tensile strength of 1700MPa, achieving ultra-high strength levels while maintaining an elongation of more than 45% and a density of approximately 7.0g / cm3 . Compared with ordinary steel, the weight reduction effect is up to 10.5%, which is suitable for manufacturing automotive parts, and can help cars to significantly "lose weight", achieve lightweight, and make its application range more extensive. The present invention does not require additional aging treatment and the addition of expensive alloy elements. In addition, by simply adjusting the annealing conditions, the mechanical properties of the steel can be adjusted according to specific application requirements, fully demonstrating good process adaptability and application potential.

[0055] Figure 2 The engineering stress-strain curve and tensile fracture morphology SEM image of the exemplary embodiment of the present invention are shown in FIG. Figure 2 It can be seen that the stress-strain curve has no obvious yield platform, presents continuous yield deformation and has a high plastic deformation capacity. The tensile fracture morphology SEM image shows that the cross section has no metallic luster, is darker in color, and is composed of a number of dimples, which is a characteristic of ductile fracture. This shows that the low-density steel of the present invention has good plasticity.

[0056] X-ray diffraction (XRD) (such as Fig. 9 ) and electron backscatter diffraction (EBSD phase diagram - Fig.10 ) shows a dual-phase structure consisting of 81.9% face-centered cubic (FCC) phase γ-austenite and 16.5% body-centered cubic (BCC) phase B2.

[0057] The unique microstructure of the sample in the embodiment includes the coexistence of refined recrystallized austenite grains, discontinuous strip-shaped B2 phases, and dispersed B2 phases, forming a multi-level, multi-dimensional heterogeneous reinforcement structure. In this structure, the reinforcements of different scales interact and have synergistic effects, synergistically combining the effects of fine grain strengthening, B2 precipitation strengthening, and heterogeneous strain hardening and strengthening to form multi-scale heterogeneous mixed strengthening, which achieves significant improvements in both strength and plasticity, and all without the need for additional aging treatment and the addition of expensive alloying elements. In addition, by simply adjusting the annealing conditions, the mechanical properties of the steel can be adjusted according to specific application requirements, fully demonstrating good process adaptability and application potential.

[0058] The present invention also discloses a processing device for ultra-high strength, plastic heterogeneous low-density steel, including a heat preservation device, the heat preservation device includes a heat preservation heating furnace 1, and the heat preservation heating furnace 1 is applied to the fourth step of the ultra-high strength, plastic heterogeneous low-density steel preparation method of the present invention, and is used to insulate the forged rods to keep the forged rods at 950°C, which is convenient for subsequent hot rolling treatment and avoids the forged rods from losing temperature.

[0059] An intermediate groove 7 is provided in the middle of the bottom end of the thermal insulation heating furnace 1, and multiple circular grooves 3 are provided on both sides of the intermediate groove 7. The multiple circular grooves 3 are all provided on the thermal insulation heating furnace 1, and cylinders 4 are 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 pass through the other side of the thermal insulation heating furnace 1, and a driving mechanism is telescopically provided on the other side of the thermal insulation heating furnace 1, and the driving mechanism is connected to the cylinder 4. Multiple electric heating tubes 21 are fixed inside the thermal insulation heating furnace 1. It should be noted that the multiple electric heating tubes 21 are distributed around the outer sides of the corresponding circular grooves 3.

[0060] The driving mechanism can be used to drive multiple cylinders 4 to extend out of the corresponding circular grooves 3. At this time, the opening 5 of the cylinder 4 is set upward, which is convenient for personnel to put the forging rods into the cylinder 4 through the opening 5. The driving mechanism drives the multiple cylinders 4 to retract into the circular grooves 3 to complete the closing, so that the electric heating tube 21 heats and keeps the multiple forging rods placed therein, and each forging rod is placed separately without affecting each other, and will not be piled up together, resulting in incomplete heating of the forged rod accumulation area.

[0061] Specifically, the driving mechanism includes a U-shaped sliding frame 12, the U-shaped mouth of the U-shaped sliding frame 12 is arranged toward the insulation heating furnace 1, and a telescopic groove 22 is opened on the insulation heating furnace 1 for the two ends of the U-shaped sliding frame 12 to slide out, and a spring 11 is fixed inside the telescopic groove 22, and one end of the spring 11 is fixedly connected to the corresponding end of the U-shaped sliding frame 12, and a plurality of motors 14 are fixed on the side of the U-shaped sliding frame 12 away from the insulation heating furnace 1, and the driving shafts of the plurality of motors 14 are fixedly connected to the center of one end of the corresponding cylinder 4, and an electric push rod 13 is fixed between the side of the U-shaped sliding frame 12 close to the insulation heating furnace 1 and the insulation heating furnace 1.

[0062] In the actual operation of the present invention, by driving the electric push rod 13 to retract, the U-shaped sliding frame 12 is moved close to the insulation heating furnace 1, so that the two ends of the U-shaped sliding frame 12 slide into the insulation 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 forged rod into the cylinder 4, or taking out the forged rod in the cylinder 4.

[0063] Furthermore, by starting a plurality of motors 14, the cylinder 4 can be driven to rotate in the corresponding circular groove 3, so that the forged rods in the cylinder 4 can be heated at a fixed angle and heated more evenly. Furthermore, after the insulation is completed, the motor 14 drives the opening 5 of the cylinder 4 to rotate to the rolling channel 15. The forged rods in the cylinder 4 are automatically rolled into the discharge trough 16 through the rolling channel 15 by their own gravity, thereby completing the automatic output of the forged rods. At the same time, by starting a certain motor 14 alone, the output of the forged rods in the corresponding cylinder 4 can be completed alone.

[0064] One end of the rolling channel 15 close to the discharge trough 16 is tilted downward to facilitate the forged rods to be discharged by rolling at the tilted angle.

[0065] A feed chute 16 is arranged between the circular groove 3 and the middle groove 7, a rolling channel 15 is opened on the same side of the plurality of circular grooves 3, the rolling channel 15 is connected to the feed chute 16, one side of the bottom end of the feed chute 16 is connected to the middle groove 7, a plurality of buffer plates 17 are rotatably connected to the inner wall of the feed chute 16, the plurality of buffer plates 17 are rotatably connected to the inner wall of the feed chute 16 through a rotating shaft, a torsion spring is arranged on the rotating shaft, and the plurality of buffer plates 17 are staggered and distributed at equal distances along the height direction of the feed chute 16, sandpaper 18 is fixed to the upper surface of the plurality of buffer plates 17, and the plurality of buffer plates 17 are arranged to be tilted downward at one end away from the feed chute 16.

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

[0067] The staggered buffer plates 17 can avoid collisions between multiple forged bars when they are discharged at the same time, thereby avoiding the breakage of the forged bars caused by collisions.

[0068] Support legs 8 are fixed on both sides of the bottom of the insulation heating furnace 1, and a support plate 9 is fixed between the two support legs 8. A collecting box 10 is placed on the supporting plate 9. The collecting box 10 can automatically collect the forged rods discharged from the discharge chute 16. A first temperature sensor is embedded on the inner wall of the collecting box 10 for real-time monitoring of the temperature of the forged rods stored in the collecting box 10.

[0069] A second temperature sensor is provided inside each of the multiple cylinders 4. One 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 insulation baffle 6. The second temperature sensor is used to monitor the temperature inside the cylinder 4 to check whether it reaches the appropriate temperature.

[0070] A heat exhaust pipe 2 is provided at the top of the thermal insulation heating furnace 1, and an output pipe 19 is connected to the top of the discharge chute 16. The top of the output pipe 19 is connected to the heat exhaust pipe 2. A solenoid valve 20 is provided 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 plastic heterogeneous low-density steel, characterized in that: The following steps are involved: S1, vacuum smelting and casting the alloy raw materials according to the composition ratio to obtain an ingot; S2, subjecting the ingot to a high temperature homogenization treatment at 1050° C., and then cooling the ingot to room temperature; S3, preheating and forging the cooled ingot, and cooling it again to room temperature in air to obtain a forged rod; S4, after the forged bar is kept at 950° C. by a heat preservation device, hot rolling is performed with a deformation amount of 67% to form a slab, and water-cooling is performed to room temperature; S5, directly cold rolling the water-cooled slab to a deformation amount of 42%; S6, annealing the cold-rolled slab at 900° C. and water-cooling it to room temperature to obtain a finished low-density steel; The total mass of the finished low-density steel is 100%, wherein the chemical components and their mass percentages are: Mn is 20%, Al is 8%, C is 0.8%, and Fe is 71.2%.

2. An ultra-high strength plastic heterogeneous low-density steel processing equipment, characterized by: It comprises the method for preparing ultra-high strength and plastic heterogeneous low-density steel as claimed in claim 1, and also comprises a heat preservation device, the heat preservation device comprises a heat preservation heating furnace (1), a middle groove (7) is provided in the middle of the bottom end of the heat preservation heating furnace (1), a plurality of circular grooves (3) are provided on both sides of the middle groove (7), the plurality of circular grooves (3) are provided on the heat preservation heating furnace (1), a cylinder (4) is rotatably connected inside the plurality of circular grooves (3), an opening (5) is provided at the top end of the cylinder (4), the plurality of circular grooves (3) penetrate the other side of the heat preservation heating furnace (1), and a driving mechanism is telescopically provided on the other side of the heat preservation heating furnace (1), the driving mechanism is connected to the cylinder (4), and a plurality of electric heating tubes (21) are fixed inside the heat preservation heating furnace (1); A material discharge trough (16) is provided between the circular groove (3) and the middle groove (7); a rolling channel (15) is provided on the same side of the plurality of circular grooves (3); the rolling channel (15) is connected to the material discharge trough (16); one side of the bottom end of the material discharge trough (16) is connected to the middle groove (7); and a plurality of buffer plates (17) are rotatably connected to the inner wall of the material discharge trough (16).

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

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

5. The ultra-high strength plastic heterogeneous low density steel processing equipment according to claim 2 is characterized by: The plurality of buffer plates (17) are rotatably connected to the inner wall of the material discharge chute (16) via a rotating shaft, a torsion spring is arranged on the rotating shaft, and the plurality of buffer plates (17) are staggered and distributed at equal distances along the height direction of the material discharge chute (16), sandpaper (18) is fixed on the upper surfaces of the plurality of buffer plates (17), and the plurality of buffer plates (17) are arranged to be tilted downward at one end away from the material discharge chute (16).

6. The ultra-high strength plastic heterogeneous low density steel processing equipment according to claim 2 is characterized by: Support legs (8) are fixed on both sides of the bottom end of the heat-insulating 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), and a first temperature sensor is embedded on the inner wall of the collection box (10).

7. The ultra-high strength plastic heterogeneous low density steel processing equipment according to claim 3 is characterized by: A second temperature sensor is arranged inside each of the plurality of cylinders (4); one end of the plurality of 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 a heat-insulating baffle (6).

8. The ultra-high strength and plastic heterogeneous low-density steel processing equipment according to claim 2 is characterized by: A heat exhaust pipe (2) is provided at the top of the heat preservation heating furnace (1), an output pipe (19) is connected to the top of the feed chute (16), 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 point between the output pipe (19) and the heat exhaust pipe (2).

9. The ultra-high strength plastic heterogeneous low density steel processing equipment according to claim 2, characterized in that: One end of the rolling channel (15) close to the material discharge chute (16) is arranged to be inclined downward.

10. An ultra-high strength-ductility heterogeneous low-density steel, characterized by: The production is carried out using the method for preparing ultra-high strength, plasticity, heterogeneous low-density steel as described in claim 1.

Images