Production equipment and production method for low-temperature-impact-resistant high-elongation hot-rolled strip steel

Abstract

The invention relates to the technical field of strip steel production equipment, in particular to low-temperature-impact-resistant high-elongation hot-rolled strip steel production equipment and a production method.The low-temperature-impact-resistant high-elongation hot-rolled strip steel production equipment comprises dephosphorization equipment, the dephosphorization equipment is composed of a scraping part, a guiding part, a beating part, a cleaning part and an acid pickling part, and the scraping part, the guiding part, the beating part, the cleaning part and the acid pickling part are all fixed in the dephosphorization equipment; the scraping part is arranged at the feeding end of the dephosphorization equipment, the acid pickling part is arranged at the discharging end of the dephosphorization equipment, a beating part and a cleaning part are sequentially arranged between the scraping part and the acid pickling part from the scraping part to the acid pickling part, the multiple guiding parts are arranged, and the guiding parts are arranged between the scraping part and the beating part and between the cleaning part and the acid pickling part. A guide part is arranged at the tail part of the pickling part. The method is used for cleaning an oxidized scale layer on the surface of the strip steel subjected to heat treatment, and the later-stage strip steel machining effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of strip steel production equipment, and in particular to low-temperature impact-resistant high-elongation hot-rolled strip steel production equipment and a production method. Background Art

[0002] Low-temperature impact-resistant and high-elongation hot-rolled strip steel is a type of steel specially designed to maintain good mechanical properties in low-temperature environments. This type of steel is made through special smelting, heat treatment and rolling processes to ensure that it still has high impact toughness and good plastic deformation ability under low-temperature conditions. The production of low-temperature impact-resistant and high-elongation hot-rolled strip steel needs to go through smelting, heat treatment, hot rolling and cooling processes in sequence. Among them, dephosphorization treatment is required when hot rolling the strip steel after heating treatment.

[0003] The existing announcement number is CN101045239A, and the name is a production method of hot-rolled strip steel, which casts a hot long-length slab with a thickness of more than 100 mm and equivalent to the length of several hot strip steel coils on a continuous casting device, supplies the hot long-length slab to a finishing device, and performs a large-pressure thinning process with at least a forging processing device to become a thin slab, then uses a finishing rolling unit to roll the thin slab into a hot-rolled strip steel of a specified thickness, and then coils it on a coiler, and at the same time, cuts the hot-rolled strip steel during movement as needed to obtain a hot-rolled strip coil of a specified coiling length, and then cuts the hot-rolled strip steel into a hot-rolled strip coil of a specified coiling length on the hot long-length slab supplied by the continuous casting device. After the roughing equipment completes the thinning process and before the next long slab is supplied by the continuous casting equipment, the reheated slab of normal length drawn from the heating furnace is supplied to the roughing equipment. After the thinning process of the roughing equipment and the rolling of the finishing mill, the reheated slab is rolled into a hot-rolled strip. Since the pressing part of the width press device moves in the slab flow direction together with the slab during the width pressing process, and the pressing part of the thickness press device also moves in the slab flow direction together with the slab during the thickness pressing process, and moves at a normal conveying speed at other times, continuous rolling processing can be performed. In addition, since the width pressing operation and the thickness pressing operation are not performed at the same time, but are performed at staggered times, they will not have adverse effects on each other.

[0004] However, in the production of hot-rolled steel strip with low-temperature impact resistance and high elongation, the heat-treated steel strip directly enters the hot rolling equipment for hot rolling treatment. However, there is an oxide scale layer on the surface of the heat-treated steel strip. If these oxide scale layers are not handled in time, the subsequent hot rolling of the steel strip will be affected, resulting in poor hot rolling effect of the steel strip. The hot-rolled steel strip production line lacks dephosphorization equipment, which affects the processing effect of the steel strip. Summary of the invention

[0005] The present invention solves the problems in the related art and provides a production device and a production method for hot-rolled steel strip with low temperature impact resistance and high elongation.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a low-temperature impact-resistant and high-elongation hot-rolled strip production equipment, including a dephosphorization equipment, the dephosphorization equipment is composed of a scraping part, a guide part, a knocking part, a cleaning part and a pickling part, the scraping part, the guide part, the knocking part, the cleaning part and the pickling part are all fixed in the dephosphorization equipment, the scraping part is arranged at the feed end of the dephosphorization equipment, the pickling part is arranged at the discharge end of the dephosphorization equipment, the knocking part and the cleaning part are arranged in sequence between the scraping part and the pickling part from the scraping part toward the pickling part, a plurality of guide parts are arranged, guide parts are arranged between the scraping part and the knocking part, the cleaning part and the pickling part, and a guide part is arranged at the tail of the pickling part.

[0007] As a preferred embodiment, the scraping member includes a scraping slide frame, which is symmetrically arranged in two pieces. The two scraping slide frames are fixed in the dephosphorization equipment, and two lifting slides are horizontally symmetrically arranged between the two scraping slide frames. The two lifting slides are respectively vertically slidably assembled between the two scraping slide frames, and scrapers are vertically arranged on the adjacent horizontal end surfaces of the two lifting slides. Scraping springs are vertically arranged on both sides of the adjacent horizontal end surfaces of the two lifting slides, and the two ends of the scraping springs are respectively fixed on the adjacent end surfaces of the two lifting slides.

[0008] As a preferred solution, a rotating rod is horizontally fixed on the lifting slide, a rotating drum is horizontally fixed on one end of the scraper close to the lifting slide, and the rotating drum on the scraper is rotatably connected to the rotating rod of the lifting slide, a plurality of scraping teeth are evenly and vertically fixed on adjacent horizontal end surfaces of the scraper, a plurality of elastic pressure sheets are horizontally and vertically fixed at one end of the lifting slide, and the bottom ends of the plurality of elastic pressure sheets are fixed on the scraper.

[0009] As a preferred embodiment, the guide member includes a slide plate, two slide plates are symmetrically arranged, and the two slide plates are fixed in the dephosphorization equipment, and two clamping rollers are horizontally symmetrically arranged between the two slide plates, one of the bottom of the two clamping rollers is horizontally rotatably connected to the bottom of the two slide plates, and the other bottom of the two clamping rollers is horizontally rotatably connected to the top of the two slide plates, a slide groove is vertically penetrated through the upper part of the two slide plates, and a slider is vertically slidably assembled in the slide groove of the slide plate, a guide rod is fixed on the top surface of the slider vertically penetrating the top surface of the slide plate, and a guide spring is vertically sleeved on the outside of the guide rod, and the two ends of the guide spring are respectively fixed to the top end of the guide rod and the top surface of the slide plate.

[0010] As a preferred solution, the slider is rotatably connected to the clamping rollers at the top of the two slide plates, a plurality of supporting elastic sheets are evenly fixed on the outer circumference of the clamping roller, and a plurality of clamping strips are evenly and horizontally arranged outside the outer circumference of the clamping roller, and the plurality of clamping strips are fixedly connected to the top ends of the plurality of supporting elastic sheets.

[0011] As a preferred embodiment, the striking part includes a rotating plate, two rotating plates are symmetrically arranged, and the two rotating plates are fixed in the dephosphorization equipment, and two striking rods are horizontally symmetrically arranged between the two rotating plates, the two striking rods are rotatably connected to the two rotating plates respectively, and multiple hammer heads are horizontally arranged on the outer walls of the two striking rods, and the multiple hammer heads are fixed to the outer walls of the striking rods through chains, a striking motor is horizontally fixed on the outer wall of one of the two rotating plates, and the output end of the striking motor is fixed to the end of the striking rod.

[0012] As a preferred embodiment, the cleaning part includes a cleaning hole frame, which is fixed in the dephosphorization equipment, and the upper and lower ends of the cleaning hole frame are vertically slidably assembled with cleaning rod plates, and the upper and lower sides of the inner wall of the cleaning hole frame are horizontally fixed with multiple cleaning elastic sheets, and the bottom surfaces of the multiple cleaning elastic sheets are fixed on the cleaning rod plates, scraping brushes are horizontally fixed on the adjacent horizontal end surfaces of the two cleaning rod plates inside the cleaning hole frame, and jet rods are horizontally fixed on both sides of the adjacent horizontal end surfaces of the two cleaning rod plates.

[0013] As a preferred solution, the pickling parts include a pickling frame, which is horizontally fixed in the dephosphorization equipment, and both ends of the pickling frame are horizontally penetrated with through grooves, and the upper and lower ends of the interior of the pickling frame are horizontally fixed with acid spray boxes, and multiple nozzles are penetrated and fixed on the acid spray boxes.

[0014] As a preferred solution, a suction box is fixed through the bottom surface of the pickling frame, and a spiral shell is vertically connected and fixed to the bottom surface of the suction box, a filter cartridge is vertically arranged at the bottom of the spiral shell, and a spiral ring is vertically connected and fixed to the top end of the filter cartridge, an activated carbon block is vertically filled in the filter cartridge, and the spiral ring of the filter cartridge is threadedly assembled in the spiral shell, and a suction pump is vertically connected and fixed to the bottom end of the filter cartridge.

[0015] A method for producing low temperature impact resistant high elongation hot rolled steel strip, characterized in that it comprises the following steps: S1. Smelting: Select appropriate alloy element ratio and add them into the smelting furnace for smelting treatment. Control the chemical composition of the steel through the smelting process to achieve the required mechanical properties and smelt to form strip steel billets; S2. Heat treatment: The strip steel billet is subjected to quenching, tempering and other heat treatment processes in the heat treatment equipment to improve the microstructure of the steel and enhance its comprehensive performance; S3, dephosphorization: the heat-treated strip steel billet is guided into the dephosphorization equipment, and the heat-treated strip steel billet is dephosphorized by mechanical dephosphorization or chemical dephosphorization or a combination of the two; S4, hot rolling: the dephosphorized steel strip is guided into a hot rolling mill for hot rolling, and the steel is rolled into a strip of required thickness and width at high temperature, and its mechanical properties are optimized by controlling the rolling temperature and speed; S5. Cooling: The hot-rolled strip is guided into the cooling equipment. The cooling equipment adopts controlled cooling technology to ensure that the steel forms an ideal microstructure during the cooling process and improves its low-temperature performance.

[0016] Compared with the prior art, the invention has the following beneficial effects: during use, the heat-treated metal blank is introduced from the scraping part of the dephosphorization equipment, the metal blank passes through the striking part and the cleaning part in the dephosphorization equipment in turn, the scraping part, the striking part and the cleaning part are combined to form a mechanical dephosphorization component for the heat-treated metal blank, the oxide layer on the heat-treated metal blank is physically removed, and then the heat-treated metal blank is discharged from the dephosphorization equipment, and at the same time, the heat-treated metal blank passes through the pickling part on the dephosphorization equipment, and the pickling part is used to form a chemical dephosphorization component for the heat-treated metal blank, The oxide layer on the metal billet after heat treatment is removed by chemical means. When the metal billet after heat treatment passes through scraping parts, hammering parts, cleaning parts and pickling parts in sequence, the oxide layer on the metal billet after heat treatment is removed by a combination of physical and chemical methods, so as to clean the oxide scale layer on the surface of the heat-treated strip steel, thereby avoiding the impact on the hot rolling of the strip steel, resulting in poor hot rolling effect of the strip steel, and the lack of phosphorus removal equipment in the hot-rolled strip steel production line, which affects the processing effect of the strip steel. The oxide scale layer on the surface of the treated strip steel is cleaned to ensure the later strip steel processing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a production equipment for hot-rolled steel strips with low temperature impact resistance and high elongation; Figure 2 It is a schematic diagram of the exploded structure of a production equipment for hot-rolled steel strips resistant to low temperature impact and high elongation; Figure 3 2 is a schematic structural diagram of a scraper in a disassembled state in an embodiment of a low temperature impact resistant high elongation hot rolled strip steel production equipment; Figure 4 It is a schematic structural diagram of a cleaning part in a disassembled state in an embodiment of a low temperature impact resistant high elongation hot rolled strip steel production equipment; Figure 5 It is a schematic diagram of the structure of the striking part in the decomposed state in the embodiment of the low temperature impact resistant high elongation hot rolled strip steel production equipment; Figure 6 It is a schematic diagram of the structure of the pickling parts in the decomposed state in the embodiment of the low temperature impact resistant high elongation hot rolled strip steel production equipment; Figure 7 This is a schematic diagram of the structure of the guide member in the decomposed state in the embodiment of the low temperature impact resistant high elongation hot rolled strip steel production equipment Figure 8 It is a processing flow chart in an embodiment of a low temperature impact resistant high elongation hot rolled strip steel production equipment.

[0018] In the figure: 1. scraping part; 11. scraping slide frame; 12. lifting slide plate; 13. scraper; 14. scraping teeth; 15. scraping spring; 16. elastic pressure sheet; 2. guide part; 21. slide plate; 22. slider; 23. clamping roller; 24. clamping strip; 25. supporting elastic sheet; 26. guide rod; 27. guide spring; 3. knocking part; 31. rotating plate; 32. knocking rod; 33. hammer; 34. knocking motor; 4. cleaning part; 41. cleaning hole frame; 42. cleaning rod plate; 43. cleaning elastic sheet; 44. scraping brush; 45. jet rod; 5. pickling part; 51. pickling frame; 52. through groove; 53. acid spray box; 54. suction box; 55. screw shell; 56. filter cartridge; 57. screw ring; 58. activated carbon block; 59. suction pump. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0023] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0024] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0025] Embodiment 1: like Figure 1 and Figure 2As shown, a production equipment for hot-rolled steel strip with high elongation and low temperature impact resistance comprises a dephosphorization equipment, which is composed of a scraper 1, a guide 2, a knocking piece 3, a cleaning piece 4 and a pickling piece 5. The scraper 1, the guide 2, the knocking piece 3, the cleaning piece 4 and the pickling piece 5 are all fixed in the dephosphorization equipment. The scraper 1 is arranged at the feeding end of the dephosphorization equipment, and the pickling piece 5 is arranged at the discharging end of the dephosphorization equipment. The knocking piece 3 and the cleaning piece 4 are arranged in sequence from the scraper 1 to the pickling piece 5. A plurality of guide members 2 are arranged, and guide members 2 are arranged between the scraper 1 and the knocking piece 3 and between the cleaning piece 4 and the pickling piece 5. The tail of the pickling piece 5 is provided with a guide member 2. During use, the heat-treated metal billet is introduced from the scraper 1 of the dephosphorization equipment, and the metal billet passes through the knocking piece 3 and the cleaning piece 4 in the dephosphorization equipment in sequence. The scraper 1, the knocking piece 3 and the cleaning piece 4 are combined to form a heat-treated The invention discloses a mechanical dephosphorization component for the heat-treated metal billet, which adopts physical method to remove the oxide layer on the heat-treated metal billet, and then the heat-treated metal billet is discharged from the dephosphorization equipment. At the same time, the heat-treated metal billet passes through the pickling part 5 on the dephosphorization equipment, and the pickling part 5 is used to form a chemical dephosphorization component for the heat-treated metal billet, which adopts chemical method to remove the oxide layer on the heat-treated metal billet. When the heat-treated metal billet passes through the scraping part 1, the knocking part 3, the cleaning part 4 and the pickling part 5 in sequence, the oxide layer on the heat-treated metal billet is removed by a combination of physical and chemical methods, so as to clean the oxide scale layer on the surface of the heat-treated strip steel, which is avoided from being affected during the hot rolling of the strip steel, resulting in the deterioration of the hot rolling effect of the strip steel, the lack of dephosphorization equipment in the hot-rolled strip steel production line, which affects the processing effect of the strip steel, and the oxide scale layer on the surface of the treated strip steel is cleaned to ensure the later processing effect of the strip steel.

[0026] In one embodiment, Figure 2 and 3As shown, the scraper 1 includes a scraper slide frame 11, which is symmetrically arranged with two scraper slide frames 11, and the two scraper slide frames 11 are fixed in the dephosphorization equipment, and two lifting slide plates 12 are horizontally symmetrically arranged between the two scraper slide frames 11, and the two lifting slide plates 12 are respectively vertically slidably assembled between the two scraper slide frames 11, and scrapers 13 are vertically arranged on the adjacent horizontal end surfaces of the two lifting slide plates 12, and scraper springs 15 are vertically arranged on both sides of the adjacent horizontal end surfaces of the two lifting slide plates 12, and the two ends of the scraper spring 15 are respectively fixed on the adjacent end surfaces of the two lifting slide plates 12, a rotating rod is horizontally fixed on the lifting slide plate 12, a rotating drum is horizontally fixed on one end of the scraper 13 close to the lifting slide plate 12, and the rotating drum on the scraper 13 is rotatably connected to the rotating rod of the lifting slide plate 12, and a plurality of scraping teeth 1 are evenly and vertically fixed on the adjacent horizontal end surfaces of the scraper 13 4. A plurality of elastic pressure sheets 16 are fixed laterally and vertically at one end of the lifting slide 12, and the bottom ends of the plurality of elastic pressure sheets 16 are fixed on the scraper 13. When the heat-treated strip passes between the two scrapers 13 during use, the lifting slide 12 between the two scraper slide frames 11 pulls the two lifting slides 12 to move vertically between the two scraper slide frames 11 under the deformation force of the scraper spring 15, driving the scraping teeth 14 on the end faces of the two scrapers 13 to scrape off the oxide scale layer on the surface of the heat-treated strip. At the same time, in order to ensure the scraping effect of the scraper 13 on the surface of the heat-treated strip, the scraper 13 is driven by the heat-treated strip to rotate on the lifting slide 12, squeezing the elastic pressure sheet 16 to deform, and the deformation force of the elastic pressure sheet 16 pushes the scraper 13 to press against the surface of the heat-treated strip, thereby ensuring the effectiveness of scraping off the oxide scale layer on the surface of the heat-treated strip.

[0027] In one embodiment, Figure 2 and 7As shown, the guide member 2 includes a slide plate 21, and the slide plates 21 are symmetrically arranged with two pieces, and the two slide plates 21 are fixed in the dephosphorization equipment, and two clamping rollers 23 are horizontally symmetrically arranged between the two slide plates 21, one of the bottom of the two clamping rollers 23 is horizontally rotatably connected to the bottom of the two slide plates 21, and the other bottom of the two clamping rollers 23 is horizontally rotatably connected to the top of the two slide plates 21, and the upper part of the two slide plates 21 is vertically penetrated with a slide groove, and a slider 22 is vertically slidably assembled in the slide groove of the slide plate 21, and a guide rod 26 is fixed on the top surface of the slider 22, which vertically penetrates the top surface of the slide plate 21, and a guide spring 27 is vertically sleeved on the outside of the guide rod 26, and the two ends of the guide spring 27 are respectively fixed to the top of the guide rod 26 and the top surface of the slide plate 21, and the slider 2 2 is rotatably connected to the top clamping rollers 23 of the two slide plates 21, and a plurality of supporting elastic sheets 25 are evenly fixed on the outer circumferential surface of the clamping roller 23, and a plurality of clamping strips 24 are evenly and horizontally arranged on the outer circumferential surface of the clamping roller 23, and the plurality of clamping strips 24 are fixedly connected to the top of the plurality of supporting elastic sheets 25. In order to ensure the transportation stability of the heat-treated strip steel during use, the heat-treated strip steel is clamped and extruded by the two clamping rollers 23 in the two slide plates 21, and the upper clamping rollers 23 of the two slide plates 21 push the slider 22 to slide vertically in the slide groove of the slide plate 21 under the deformation force of the guide spring 27, so as to drive the upper clamping rollers 23 of the two slide plates 21 to squeeze the heat-treated strip steel on the bottom clamping rollers 23 in the two slide plates 21, thereby ensuring the transportation stability of the heat-treated strip steel.

[0028] In one embodiment, Figure 2 and 5 As shown, the beating member 3 includes a rotating plate 31, which is symmetrically arranged with two rotating plates 31, and the two rotating plates 31 are fixed in the dephosphorization equipment, and two beating rods 32 are horizontally symmetrically arranged between the two rotating plates 31, the two beating rods 32 are rotatably connected to the two rotating plates 31, and a plurality of hammer heads 33 are horizontally arranged on the outer walls of the two beating rods 32, and the plurality of hammer heads 33 are fixed to the outer walls of the beating rods 32 through chains, a beating motor 34 is horizontally fixed on the outer wall of one of the two rotating plates 31, and the output end of the beating motor 34 is fixed to the end of the beating rod 32, during use, the beating motor 34 on one side of the two rotating plates 31 is started to drive the two beating rods 32 to rotate on the two rotating plates 31, and the rotating two beating rods 32 drive the plurality of hammer heads 33 to beat the heat-treated strip under the action of centrifugal force, and the beating vibration knocks off the oxide scale layer on the surface of the heat-treated strip.

[0029] In one embodiment, Figure 2 and 4As shown, the cleaning member 4 includes a cleaning hole frame 41, the cleaning hole frame 41 is fixed in the dephosphorization equipment, and the upper and lower ends of the cleaning hole frame 41 are vertically slidably assembled with cleaning rod plates 42, the upper and lower sides of the inner wall of the cleaning hole frame 41 are horizontally fixed with multiple cleaning elastic sheets 43, and the bottom surfaces of the multiple cleaning elastic sheets 43 are fixed on the cleaning rod plates 42, and the adjacent horizontal end surfaces of the two cleaning rod plates 42 inside the cleaning hole frame 41 are horizontally fixed with scraping brushes 44, and the adjacent water end surfaces of the two cleaning rod plates 42 are Jet rods 45 are horizontally fixed on both sides of the flat end surface. During use, the heat-treated strip steel passes between the two cleaning rod plates 42 between the cleaning hole frames 41. Under the deformation force of the multiple cleaning elastic sheets 43, the two cleaning rod plates 42 are pushed to press against the surface of the heat-treated strip steel. The oxide scale layer on the surface of the heat-treated strip steel is scraped off by the scraper 44. At the same time, the jet rod 45 is connected to the external air supply pipeline, and air is sprayed on the heat-treated strip steel to blow off the oxide scale layer.

[0030] In one embodiment, Figure 2 and 6 As shown, the pickling part 5 includes a pickling frame 51, which is horizontally fixed in the dephosphorization equipment, and through grooves 52 are horizontally penetrated at both ends of the pickling frame 51, and acid spray boxes 53 are horizontally fixed at the upper and lower ends of the interior of the pickling frame 51, and a plurality of nozzles are penetrated and fixed on the acid spray box 53, a suction box 54 is penetrated and fixed on the bottom surface of the pickling frame 51, and a spiral shell 55 is vertically connected and fixed on the bottom surface of the suction box 54, a filter cartridge 56 is vertically arranged at the bottom of the spiral shell 55, and a spiral ring 57 is vertically connected and fixed at the top of the filter cartridge 56, an activated carbon block 58 is vertically filled in the filter cartridge 56, and the spiral ring 57 of the filter cartridge 56 is threadedly assembled in the spiral shell 55, and the filter cartridge 56 is vertically filled with an activated carbon block 58. A suction pump 59 is vertically connected and fixed at the bottom end. During use, the acid spray box 53 is connected to the external acid supply pipeline. The heat-treated strip steel is guided into the pickling frame 51 from the through grooves 52 at both ends. The heat-treated strip steel is sprayed with acid by multiple nozzles on the acid spray box 53 in the pickling frame 51. The acid liquid soaks or sprays the surface of the strip steel, dissolves the oxide scale through chemical reaction, and removes the oxide scale layer on the surface of the heat-treated strip steel. The suction pump 59 is started to drive external air into the pickling frame 51, and the air carries the waste gas generated by the acid liquid into the filter cartridge 56. The waste gas generated by the acid liquid is adsorbed, removed and discharged by the activated carbon block 58. At the same time, the filter cartridge 56 and the screw ring 57 are disassembled to replace the internal activated carbon block 58.

[0031] A method for producing low-temperature impact-resistant high-elongation hot-rolled steel strip comprises the following steps: S1. Smelting: Select appropriate alloy element ratio and add them into the smelting furnace for smelting treatment. Control the chemical composition of the steel through the smelting process to achieve the required mechanical properties and smelt to form strip steel billets; S2. Heat treatment: The strip steel billet is subjected to quenching, tempering and other heat treatment processes in the heat treatment equipment to improve the microstructure of the steel and enhance its comprehensive performance; S3, dephosphorization: the heat-treated strip steel billet is guided into the dephosphorization equipment, and the heat-treated strip steel billet is dephosphorized by mechanical dephosphorization or chemical dephosphorization or a combination of the two; S4, hot rolling: the dephosphorized steel strip is guided into a hot rolling mill for hot rolling, and the steel is rolled into a strip of required thickness and width at high temperature, and its mechanical properties are optimized by controlling the rolling temperature and speed; S5. Cooling: The hot-rolled strip is guided into the cooling equipment. The cooling equipment adopts controlled cooling technology to ensure that the steel forms an ideal microstructure during the cooling process and improves its low-temperature performance.

[0032] In this embodiment, when the heat-treated strip passes between the two scrapers 13, the lifting slide 12 between the two scraping slide frames 11 is pulled by the deformation force of the scraping spring 15 to move vertically between the two scraping slide frames 11, driving the scraping teeth 14 on the end faces of the two scrapers 13 to scrape off the oxide scale layer on the surface of the heat-treated strip, and starting the knocking motor 34 on one side of the two rotating plates 31 to drive the two knocking rods 32 to rotate on the two rotating plates 31. The rotating two knocking rods 32 drive multiple hammer heads 33 to hammer the heat-treated strip under the action of centrifugal force. The knocking vibration knocks off the oxide scale layer on the surface of the heat-treated strip, and the heat-treated strip passes between the two cleaning rod plates 42 between the cleaning hole frames 41. The two cleaning rod plates 42 are pressed between multiple cleaning springs. Under the deformation force of the force sheet 43, the two cleaning rod plates 42 are pushed to press against the surface of the heat-treated strip, and the oxide scale layer on the surface of the heat-treated strip is scraped off by the scraper 44. During use, the acid spray box 53 is connected to the external acid supply pipeline, and the heat-treated strip is guided into the pickling frame 51 from the through grooves 52 at both ends. The heat-treated strip is sprayed with acid by multiple nozzles on the acid spray box 53 in the pickling frame 51. The acid soaks or sprays the surface of the strip, dissolves the oxide scale through chemical reaction, and removes the oxide scale layer on the surface of the heat-treated strip. When the heat-treated metal blank passes through the scraper 1, the knocking part 3, the cleaning part 4 and the pickling part 5 in turn, the oxide layer on the heat-treated metal blank is removed by a combination of physical and chemical methods, thereby cleaning the oxide scale layer on the surface of the heat-treated strip.

[0033] Embodiment 2: The implementation principle and technical effects of the device provided in the embodiment of the present invention are the same as those of Example 1. For the sake of brief description, for matters not mentioned in this embodiment, reference may be made to the corresponding contents in Example 1.

[0034] In one embodiment, Figure 2and 3 As shown, the scraper 1 includes a scraper slide frame 11, which is symmetrically arranged with two scraper slide frames 11, and the two scraper slide frames 11 are fixed in the dephosphorization equipment, and two lifting slide plates 12 are horizontally symmetrically arranged between the two scraper slide frames 11, and the two lifting slide plates 12 are respectively vertically slidably assembled between the two scraper slide frames 11, and scrapers 13 are vertically arranged on the adjacent horizontal end surfaces of the two lifting slide plates 12, and scraper springs 15 are vertically arranged on both sides of the adjacent horizontal end surfaces of the two lifting slide plates 12, and the two ends of the scraper spring 15 are respectively fixed on the adjacent end surfaces of the two lifting slide plates 12, a rotating rod is horizontally fixed on the lifting slide plate 12, a rotating drum is horizontally fixed on one end of the scraper 13 close to the lifting slide plate 12, and the rotating drum on the scraper 13 is rotatably connected to the rotating rod of the lifting slide plate 12, and a plurality of scraping teeth 1 are evenly and vertically fixed on the adjacent horizontal end surfaces of the scraper 13 4. A plurality of elastic pressure sheets 16 are fixed laterally and vertically at one end of the lifting slide 12, and the bottom ends of the plurality of elastic pressure sheets 16 are fixed on the scraper 13. When the heat-treated strip passes between the two scrapers 13 during use, the lifting slide 12 between the two scraper slide frames 11 pulls the two lifting slides 12 to move vertically between the two scraper slide frames 11 under the deformation force of the scraper spring 15, driving the scraping teeth 14 on the end faces of the two scrapers 13 to scrape off the oxide scale layer on the surface of the heat-treated strip. At the same time, in order to ensure the scraping effect of the scraper 13 on the surface of the heat-treated strip, the scraper 13 is driven by the heat-treated strip to rotate on the lifting slide 12, squeezing the elastic pressure sheet 16 to deform, and the deformation force of the elastic pressure sheet 16 pushes the scraper 13 to press against the surface of the heat-treated strip, thereby ensuring the effectiveness of scraping off the oxide scale layer on the surface of the heat-treated strip.

[0035] In one embodiment, Figure 2 and 5 As shown, the beating member 3 includes a rotating plate 31, which is symmetrically arranged with two rotating plates 31, and the two rotating plates 31 are fixed in the dephosphorization equipment, and two beating rods 32 are horizontally symmetrically arranged between the two rotating plates 31, the two beating rods 32 are rotatably connected to the two rotating plates 31, and a plurality of hammer heads 33 are horizontally arranged on the outer walls of the two beating rods 32, and the plurality of hammer heads 33 are fixed to the outer walls of the beating rods 32 through chains, a beating motor 34 is horizontally fixed on the outer wall of one of the two rotating plates 31, and the output end of the beating motor 34 is fixed to the end of the beating rod 32, during use, the beating motor 34 on one side of the two rotating plates 31 is started to drive the two beating rods 32 to rotate on the two rotating plates 31, and the rotating two beating rods 32 drive the plurality of hammer heads 33 to beat the heat-treated strip under the action of centrifugal force, and the beating vibration knocks off the oxide scale layer on the surface of the heat-treated strip.

[0036] In one embodiment, Figure 2 and 4As shown, the cleaning member 4 includes a cleaning hole frame 41, the cleaning hole frame 41 is fixed in the dephosphorization equipment, and the upper and lower ends of the cleaning hole frame 41 are vertically slidably assembled with cleaning rod plates 42, the upper and lower sides of the inner wall of the cleaning hole frame 41 are horizontally fixed with multiple cleaning elastic sheets 43, and the bottom surfaces of the multiple cleaning elastic sheets 43 are fixed on the cleaning rod plates 42, and the adjacent horizontal end surfaces of the two cleaning rod plates 42 inside the cleaning hole frame 41 are horizontally fixed with scraping brushes 44, and the adjacent water end surfaces of the two cleaning rod plates 42 are Jet rods 45 are horizontally fixed on both sides of the flat end surface. During use, the heat-treated strip steel passes between the two cleaning rod plates 42 between the cleaning hole frames 41. Under the deformation force of the multiple cleaning elastic sheets 43, the two cleaning rod plates 42 are pushed to press against the surface of the heat-treated strip steel. The oxide scale layer on the surface of the heat-treated strip steel is scraped off by the scraper 44. At the same time, the jet rod 45 is connected to the external air supply pipeline, and air is sprayed on the heat-treated strip steel to blow off the oxide scale layer.

[0037] In this embodiment, when the heat-treated strip steel passes between the two scrapers 13, the lifting slide 12 between the two scraper slide frames 11 is pulled by the deformation force of the scraper spring 15 to move vertically between the two scraper slide frames 11, driving the scraping teeth 14 on the end faces of the two scrapers 13 to scrape off the oxide scale layer on the surface of the heat-treated strip steel, and starting the knocking motor 34 on one side of the two rotating plates 31 to drive the two knocking rods 32 to rotate on the two rotating plates 31. The rotating two knocking rods 32 drive multiple hammer heads 33 to beat the heat-treated strip steel under the action of centrifugal force, and the knocking vibration removes the oxide scale layer on the surface of the heat-treated strip steel. Knock-off treatment: the heat-treated strip passes through the two cleaning rod plates 42 between the cleaning hole frames 41. The two cleaning rod plates 42 are pushed against the surface of the heat-treated strip under the deformation force of multiple cleaning elastic sheets 43. The oxide scale layer on the surface of the heat-treated strip is scraped off by the scraper 44. The oxide layer on the heat-treated metal blank is removed by a combination of physical and chemical methods, thereby cleaning the oxide scale layer on the surface of the heat-treated strip. The scraper 1, the knocking member 3 and the cleaning member 4 are combined to form a mechanical dephosphorization component for the heat-treated metal blank, and the oxide layer on the heat-treated metal blank is removed by physical methods.

[0038] Embodiment 3: The implementation principle and technical effects of the device provided in the embodiment of the present invention are the same as those of Example 1. For the sake of brief description, for matters not mentioned in this embodiment, reference may be made to the corresponding contents in Example 1.

[0039] In one embodiment, Figure 2 and 6As shown, the pickling part 5 includes a pickling frame 51, which is horizontally fixed in the dephosphorization equipment, and through grooves 52 are horizontally penetrated at both ends of the pickling frame 51, and acid spray boxes 53 are horizontally fixed at the upper and lower ends of the interior of the pickling frame 51, and a plurality of nozzles are penetrated and fixed on the acid spray box 53, a suction box 54 is penetrated and fixed on the bottom surface of the pickling frame 51, and a spiral shell 55 is vertically connected and fixed on the bottom surface of the suction box 54, a filter cartridge 56 is vertically arranged at the bottom of the spiral shell 55, and a spiral ring 57 is vertically connected and fixed at the top of the filter cartridge 56, an activated carbon block 58 is vertically filled in the filter cartridge 56, and the spiral ring 57 of the filter cartridge 56 is threadedly assembled in the spiral shell 55, and the filter cartridge 56 is vertically filled with an activated carbon block 58. A suction pump 59 is vertically connected and fixed at the bottom end. During use, the acid spray box 53 is connected to the external acid supply pipeline. The heat-treated strip steel is guided into the pickling frame 51 from the through grooves 52 at both ends. The heat-treated strip steel is sprayed with acid by multiple nozzles on the acid spray box 53 in the pickling frame 51. The acid liquid soaks or sprays the surface of the strip steel, dissolves the oxide scale through chemical reaction, and removes the oxide scale layer on the surface of the heat-treated strip steel. The suction pump 59 is started to drive external air into the pickling frame 51, and the air carries the waste gas generated by the acid liquid into the filter cartridge 56. The waste gas generated by the acid liquid is adsorbed, removed and discharged by the activated carbon block 58. At the same time, the filter cartridge 56 and the screw ring 57 are disassembled to replace the internal activated carbon block 58.

[0040] In this embodiment, the heat-treated strip is guided into the pickling frame 51 from the through grooves 52 at both ends of the pickling frame 51, and the heat-treated strip is sprayed with acid by multiple nozzles on the acid spray box 53 in the pickling frame 51. The acid soaks or sprays the surface of the strip, dissolves the oxide scale through chemical reaction, and removes the oxide scale layer on the surface of the heat-treated strip. When the heat-treated metal blank passes through the scraping part 1, the knocking part 3, the cleaning part 4 and the pickling part 5 in turn, the oxide layer on the heat-treated metal blank is removed by a combination of physical and chemical methods, thereby cleaning the oxide scale layer on the surface of the heat-treated strip.

[0041] The above are preferred implementation modes of the present invention. Those skilled in the art to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. A low temperature impact resistant high elongation hot rolled strip steel production equipment, characterized in that: The invention comprises a dephosphorization device, the dephosphorization device comprising a scraper (1), a guide member (2), a knocking member (3), a cleaning member (4) and a pickling member (5), the scraper (1), the guide member (2), the knocking member (3), the cleaning member (4) and the pickling member (5) being all fixed in the dephosphorization device, the scraper (1) being arranged at the feed end of the dephosphorization device, the pickling member (5) being arranged at the discharge end of the dephosphorization device, the knocking member (3) and the cleaning member (4) being arranged in sequence between the scraper (1) and the pickling member (5) from the scraper (1) toward the pickling member (5), a plurality of guide members (2) being arranged, the guide members (2) being arranged between the scraper (1) and the knocking member (3), the cleaning member (4) and the pickling member (5), and the tail of the pickling member (5) being arranged with the guide member (2).

2. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 1, characterized in that: The scraper member (1) comprises a scraper slide frame (11), wherein two scraper slide frames (11) are symmetrically arranged, and the two scraper slide frames (11) are fixed in the dephosphorization equipment, and two lifting slide plates (12) are horizontally symmetrically arranged between the two scraper slide frames (11), and the two lifting slide plates (12) are respectively vertically slidably assembled between the two scraper slide frames (11), and scrapers (13) are vertically arranged on adjacent horizontal end surfaces of the two lifting slide plates (12), and scraper springs (15) are vertically arranged on both sides of adjacent horizontal end surfaces of the two lifting slide plates (12), and the two ends of the scraper spring (15) are respectively fixed on adjacent end surfaces of the two lifting slide plates (12).

3. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 2, characterized in that: A rotating rod is horizontally fixed through the lifting slide (12); a rotating drum is horizontally fixed to one end of the scraper (13) close to the lifting slide (12); and the rotating drum on the scraper (13) is rotatably connected to the rotating rod of the lifting slide (12); a plurality of scraping teeth (14) are evenly and vertically fixed on adjacent horizontal end surfaces of the scraper (13); a plurality of elastic pressure sheets (16) are transversely and vertically fixed to one end of the lifting slide (12); and the bottom ends of the plurality of elastic pressure sheets (16) are fixed to the scraper (13).

4. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 1, characterized in that: The guide member (2) comprises a slide plate (21), wherein two slide plates (21) are symmetrically arranged, and the two slide plates (21) are fixed in the dephosphorization equipment, and two clamping rollers (23) are horizontally symmetrically arranged between the two slide plates (21), one of the bottoms of the two clamping rollers (23) is horizontally rotatably connected to the bottoms of the two slide plates (21), and the other of the bottoms of the two clamping rollers (23) is horizontally rotatably connected to the tops of the two slide plates (21), and a slide groove is vertically penetrated through the upper parts of the two slide plates (21), and a slider (22) is vertically slidably assembled in the slide groove of the slide plate (21), and a guide rod (26) is fixed on the top surface of the slider (22) and vertically penetrates the top surface of the slide plate (21), and a guide spring (27) is vertically sleeved on the outside of the guide rod (26), and the two ends of the guide spring (27) are respectively fixed to the top of the guide rod (26) and the top surface of the slide plate (21).

5. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 4, characterized in that: The slider (22) is rotatably connected to the clamping rollers (23) at the tops of the two slide slot plates (21); a plurality of supporting elastic sheets (25) are evenly fixed on the outer circumferential surface of the clamping roller (23); a plurality of clamping strips (24) are evenly and horizontally arranged outside the outer circumferential surface of the clamping roller (23); and the plurality of clamping strips (24) are fixedly connected to the tops of the plurality of supporting elastic sheets (25).

6. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 1, characterized in that: The striking member (3) comprises a rotating plate (31), wherein two rotating plates (31) are symmetrically arranged, and the two rotating plates (31) are fixed in the dephosphorization equipment, and two striking rods (32) are horizontally symmetrically arranged between the two rotating plates (31), and the two striking rods (32) are rotatably connected to the two rotating plates (31) respectively, and a plurality of hammer heads (33) are transversely arranged on the outer walls of the two striking rods (32), and the plurality of hammer heads (33) are fixed to the outer walls of the striking rods (32) through chains, and a striking motor (34) is horizontally fixed on the outer wall of one of the two rotating plates (31), and the output end of the striking motor (34) is fixed to the end of the striking rod (32).

7. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 1, characterized in that: The cleaning member (4) comprises a cleaning hole frame (41), the cleaning hole frame (41) is fixed in the dephosphorization equipment, and the upper and lower ends of the cleaning hole frame (41) are vertically slidably assembled with cleaning rod plates (42), the upper and lower sides of the inner wall of the cleaning hole frame (41) are horizontally fixed with multiple cleaning elastic sheets (43), and the bottom surfaces of the multiple cleaning elastic sheets (43) are fixed on the cleaning rod plates (42), the adjacent horizontal end surfaces of the two cleaning rod plates (42) inside the cleaning hole frame (41) are horizontally fixed with scraping brushes (44), and the two sides of the adjacent horizontal end surfaces of the two cleaning rod plates (42) are horizontally fixed with air jet rods (45).

8. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 1, characterized in that: The pickling part (5) comprises a pickling frame (51), the pickling frame (51) is horizontally fixed in the dephosphorization equipment, and both ends of the pickling frame (51) are horizontally penetrated by through grooves (52), and the upper and lower ends of the interior of the pickling frame (51) are horizontally fixed with acid spray boxes (53), and a plurality of nozzles are penetrated and fixed on the acid spray boxes (53).

9. The low temperature impact resistant high elongation hot rolled steel strip production equipment according to claim 8, characterized in that: A suction box (54) is fixedly passed through the bottom surface of the pickling frame box (51), and a spiral shell (55) is vertically connected and fixedly connected to the bottom surface of the suction box (54). A filter cartridge (56) is vertically arranged at the bottom of the spiral shell (55), and a spiral ring (57) is vertically connected and fixedly connected to the top end of the filter cartridge (56). An activated carbon block (58) is vertically filled in the filter cartridge (56), and the spiral ring (57) of the filter cartridge (56) is threadedly assembled in the spiral shell (55), and a suction pump (59) is vertically connected and fixedly connected to the bottom end of the filter cartridge (56).

10. A method for producing low temperature impact resistant high elongation hot rolled steel strip, characterized in that: The steps include: S1. Smelting: Select appropriate alloy element ratio and add them into the smelting furnace for smelting treatment. Control the chemical composition of the steel through the smelting process to achieve the required mechanical properties and smelt to form strip steel billets; S2. Heat treatment: The strip steel billet is subjected to quenching, tempering and other heat treatment processes in the heat treatment equipment to improve the microstructure of the steel and enhance its comprehensive performance; S3, dephosphorization: the heat-treated strip steel billet is guided into the dephosphorization equipment, and the heat-treated strip steel billet is dephosphorized by mechanical dephosphorization or chemical dephosphorization or a combination of the two; S4, hot rolling: the dephosphorized steel strip is guided into a hot rolling mill for hot rolling, and the steel is rolled into a strip of required thickness and width at high temperature, and its mechanical properties are optimized by controlling the rolling temperature and speed; S5. Cooling: The hot-rolled strip is guided into the cooling equipment. The cooling equipment adopts controlled cooling technology to ensure that the steel forms an ideal microstructure during the cooling process and improves its low-temperature performance.

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