CN218435877U - Multifunctional high-strength steel plate strip heat treatment production system - Google Patents
Multifunctional high-strength steel plate strip heat treatment production system Download PDFInfo
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- CN218435877U CN218435877U CN202222196203.5U CN202222196203U CN218435877U CN 218435877 U CN218435877 U CN 218435877U CN 202222196203 U CN202222196203 U CN 202222196203U CN 218435877 U CN218435877 U CN 218435877U
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Abstract
The utility model relates to a heat treatment production system of a multifunctional high-strength steel plate belt, which comprises a preparation unit, a high-temperature heat treatment unit, a low-temperature heat treatment unit and a product collection unit which are connected in sequence; the preparation unit comprises an uncoiling device and a first shearing device; the high-temperature heat treatment unit comprises a first heating device, a first cooling device, a second shearing device and a first stacker which are sequentially connected; the low-temperature heat treatment unit comprises at least one group of low-temperature heat treatment mechanisms, and each low-temperature heat treatment mechanism comprises a second heating device and a second cooling device which are sequentially connected. In addition, a high-strength steel plate strip heat treatment production method implemented based on the production system is further provided. The utility model discloses can realize production modes such as roll-board continuous heat treatment, board-board continuous heat treatment, be applicable to the modulation thermal treatment of steel, quenching thermal treatment, tempering thermal treatment, normalizing thermal treatment production, have multichannel, multi-mode, multi-functional characteristics, can satisfy the production of many varieties, many specifications product.
Description
Technical Field
The utility model belongs to the technical field of steel heat treatment, concretely relates to multi-functional high-strength steel plate area heat treatment production system.
Background
With the improvement of the modern industrial level, the industries such as engineering machinery, commercial vehicles and the like put forward urgent demands on the aspects of light structure, upgrading and updating of products, improvement of service life of products and the like of steel materials, the demand of heat treatment of ultrahigh-strength steel and wear-resistant steel above 800MPa level is increased year by year, and the steel market puts forward higher and higher requirements on the quality and yield of the high-strength steel.
At present, the mainstream heat treatment production process of the high-strength steel in China is mainly an off-line quenching and tempering (FQT) process or a direct quenching and off-line tempering (DQT) process, but because the production period is long and the working procedures are complex, the two heat treatment processes have the defects of high investment, low efficiency, high energy consumption, poor product performance stability and the like.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a multi-functional high-strength steel plate belt heat treatment production system, which can at least solve part of the defects of the prior art.
The utility model relates to a heat treatment production system of a multifunctional high-strength steel plate belt, which comprises a preparation unit, a high-temperature heat treatment unit, a low-temperature heat treatment unit and a product collection unit which are connected in sequence;
the preparation unit comprises an uncoiling device and a first shearing device;
the high-temperature heat treatment unit comprises a first heating device, a first cooling device, a second shearing device and a first stacker crane which are sequentially connected;
the low-temperature heat treatment unit comprises at least one group of low-temperature heat treatment mechanisms, and each low-temperature heat treatment mechanism comprises a second heating device and a second cooling device which are sequentially connected; when a plurality of groups of low-temperature heat treatment mechanisms are arranged, the low-temperature heat treatment mechanisms are arranged in parallel;
the first shearing device is connected with the first heating device through a steel conveying channel, and the first stacking machine is connected with each second heating device through a steel plate transfer device; each second cooling device is connected with the product collecting unit.
As one of the implementation modes, at least one first steel plate feeding and discharging station is arranged on a steel conveying channel between the first shearing device and the first heating device, and a first steel plate feeding and discharging device capable of performing steel plate feeding and discharging or steel plate feeding operation on the steel conveying channel is arranged at the first steel plate feeding and discharging station.
As one embodiment, the preparation unit further comprises a descaling device; the first steel plate up-and-down line stations are two and are respectively arranged at the upstream and downstream of the descaling device.
As an embodiment, the product collection unit includes a finishing device and a steel plate stacking section, each of the second cooling devices is connected to a feeding port of the finishing device, and a discharging port of the finishing device is connected to the steel plate stacking section.
As an embodiment, each second cooling device is further connected to the steel plate stacking section through a bypass roller way, and two ends of the bypass roller way are located on the feeding side and the discharging side of the finishing device, respectively.
In one embodiment, a steel plate feeding station and a steel plate feeding device are arranged on a steel plate conveying roller way on the feeding side of the finishing device.
In one embodiment, the steel plate stacking section includes a plurality of second stackers arranged in parallel.
As an embodiment, a third shearing device is provided at the inlet side of each second stacker.
As an embodiment, each second heating device is provided with a feeding roller table, and the steel plate transfer device is respectively connected with each feeding roller table; the feeding roller way is provided with a second steel plate feeding and discharging station, and the second steel plate feeding and discharging station is provided with a second steel plate feeding and discharging device capable of performing steel plate feeding or steel plate feeding operation on the feeding roller way.
As an embodiment, a deviation correcting device is arranged on the inlet side of the first heating device.
The utility model discloses following beneficial effect has at least:
the utility model discloses a configuration and the production line design of relevant equipment can realize production modes such as high strength coil of strip-board continuous heat treatment, high strength steel sheet-board continuous heat treatment, are showing and are improving production efficiency, production flexibility and operational reliability, improve the plate-type of thin specification high strength steel, reduce the warehousing and transportation cost in the middle of the steel sheet, reduce unit process cost and energy consumption. The utility model discloses can be applicable to modulation thermal treatment, quenching thermal treatment, tempering thermal treatment, normalizing thermal treatment production of steel, have multichannel, multi-mode, multi-functional characteristics, a production system can satisfy the production of many varieties, many specifications product, is favorable to the steel mill to reduce disposable engineering investment.
The utility model discloses further following beneficial effect has:
the utility model discloses a rational design of multiple commodity circulation passageway establishes ties each unit each other and is independent each other again, when realizing continuous production, the productivity and the benefit of each unit and core monomer equipment can be given full play.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multifunctional high-strength steel plate strip heat treatment production system provided by an embodiment of the utility model.
Detailed Description
The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 1, an embodiment of the present invention provides a multifunctional high-strength steel plate strip heat treatment production system, which includes a preparation unit, a high-temperature heat treatment unit, a low-temperature heat treatment unit and a product collection unit, which are connected in sequence; the preparation unit comprises an uncoiling device 11 and a first shearing device 13; the high-temperature heat treatment unit comprises a first heating device 22, a first cooling device 23, a second shearing device 24 and a first stacker 25 which are connected in sequence; the low-temperature heat treatment unit comprises at least one group of low-temperature heat treatment mechanisms, and each low-temperature heat treatment mechanism comprises a second heating device 41 and a second cooling device 42 which are sequentially connected; when a plurality of groups of low-temperature heat treatment mechanisms are arranged, the low-temperature heat treatment mechanisms are arranged in parallel; wherein the first shearing device 13 is connected with the first heating device 22 through a steel material conveying channel, and the first stacker 25 is connected with each second heating device 41 through a steel plate transfer device 3; each of the second cooling devices 42 is connected to the product collecting unit.
The uncoiling device 11 is used for uncoiling a steel coil, preferably adopts a double-channel uncoiling mode, can shorten the shutdown time of coil replacement at an inlet section, and improves the production efficiency.
Preferably, as shown in fig. 1, a rough straightening device 12 is arranged at the outlet side of the uncoiling device 11, which can be used for straightening the steel coil and straightening the continuous strip steel, and can remove most of the iron scale on the surface of the strip steel, thereby primarily improving the shape and the surface quality of the strip steel. The rough straightening device 12 can adopt one or more of a pinch straightening machine, a multi-roll straightening machine and a brush roll; in consideration of poor plasticity of the high-strength steel strip, the multi-roll straightener can adopt tension rolls for straightening, the plastic deformation rate is improved through the deviation of a neutral layer, the maximum elongation rate of the surface of the steel strip is reduced, and the surface of the steel strip in the straightening process is prevented from cracking.
The first shearing device 13 can be used for cutting the head and the tail of the strip steel and realizing shearing operations such as fixed-length cutting and the like of continuous strip steel.
Further, as shown in fig. 1, the preparation unit further comprises a descaling device 14 for further removing the iron oxide scale on the surface of the steel strip or steel plate, including one or more of a shot blasting machine and a brush roller; the descaling device 14 can be arranged between the rough straightening device 12 and the first shearing device 13, or on the outlet side of the first shearing device 13. The shot blasting machine removes iron scales on the surface of the strip steel by jetting cast steel shots to the surface of the strip steel at a high speed, so that the strip steel has good surface quality before entering a heating furnace, and high-speed air curtains are arranged at the inlet and the outlet of the shot blasting machine to prevent waste shot materials from overflowing; when the shot blasting machine and the brush roll are arranged at the same time, the brush roll is arranged at the outlet of the shot blasting machine and used for removing residual steel shots and iron scale floating ash on the surface of the strip steel.
Further preferably, as shown in fig. 1, at least one first steel plate up-and-down line station is arranged on the steel conveying passage between the first shearing device 13 and the first heating device 22, and a first steel plate up-and-down line device 15 capable of performing steel plate down-line or steel plate up-and-down line operation on the steel conveying passage is arranged at the first steel plate up-and-down line station. The steel conveying channel can be a conveying roller way and the like; the first steel plate wire-feeding and wire-discharging device 15 may be a steel plate hoisting device, such as a vacuum chuck hoisting machine or a high-precision disk hoisting machine. Based on the structure, the steel plate can be processed on and off the line, the function independence of the preparation unit is realized, the steel plate can be lifted off and temporarily stored (for example, the steel plate enters a middle warehouse) when the downstream process fails, the steel plate can be lifted off and on the line when the upstream process fails, the failure is realized, the production is not stopped, and the system stability is improved.
In one embodiment, as shown in fig. 1, the two stations for the first steel plate to go up and down are arranged on the front side and the rear side of the descaling device 14, so that the function of the descaling device can be independent, the descaling of the off-line steel plate can be realized, and the productivity and the benefit of the descaling device can be exerted to the maximum extent.
Preferably, as shown in fig. 1, a deviation rectifying device 21 is disposed at the inlet side of the first heating device 22, so as to prevent the strip steel from deviating in the first heating device 22, and meanwhile, tension can be established by the deviation rectifying device 21, thereby ensuring smooth passing of the strip steel during continuous strip steel production and improving the shape of the strip steel in the first heating device 22. The deviation correcting device 21 preferably adopts a pinch deviation correcting roller form, and the deviation correcting precision can be controlled within +/-1-5 mm.
Preferably, the first heating device 22 is a heating furnace, such as a non-oxidation roller hearth heating furnace or a fully sealed induction heating furnace with inert atmosphere protection, which can effectively prevent the oxidation of the steel surface while achieving the purpose of heating the steel. Preferably, the first heating device 22 comprises a heating section and a holding section, so as to facilitate the implementation of the steel heat treatment process.
Preferably, the first cooling device 23 is configured to cool the heated strip at a set cooling rate, and may adopt one or more of an aerosol, a water mist and a water spraying manner, and may improve the cooling uniformity of the strip by using a partition cooling technique and a water-to-water ratio control technique, so as to prevent the strip from generating a large internal stress during the cooling process. Furthermore, a rolling type cooling mode with tension can be adopted, and the defect of the plate shape caused by internal stress in the cooling process of the strip steel is further prevented.
Furthermore, the outlet of the first cooling device 23 is configured with a meter and a plate shape meter, which can perform online real-time monitoring on the surface quality and the plate shape of the cooled strip steel or steel plate, and feed back the monitoring result to the first cooling device 23, and the first cooling device 23 automatically adjusts the cooling parameters in real time according to the feedback information, thereby forming closed-loop control.
The first cooling device 23 can realize several cooling modes such as continuous strip steel slow-speed tapping quenching cooling, single steel plate fast-speed tapping quenching cooling and the like.
The second shearing device 24 is mainly used for shearing operations such as fixed-length cutting and the like of continuous strip steel. The first stacker crane 25 can stack the steel plates after being cut to length orderly and further convey the steel plates to a downstream process; the first stacker crane 25 is preferably in a swinging horseshoe roller form and is hydraulically driven, so that the stacking rhythm and precision can be improved; the entrance to the first stacker 25 may be further provided with pinch rollers which may be used to assist in slowing down the steel sheet.
In one embodiment, the steel plate transferring device 3 may refer to related equipment in chinese patent application CN202111265720.7, and the specific structure is not described herein.
Preferably, the low-temperature heat treatment unit comprises a plurality of groups of low-temperature heat treatment mechanisms, so that the flexibility and the reliability of system production can be improved.
The second heating device 41 is a heating furnace, for example, a non-oxidizing roller hearth heating furnace or a fully sealed induction heating furnace with inert atmosphere protection, and can effectively prevent the surface of the steel plate from being oxidized while achieving the purpose of heating the steel plate. Preferably, the second heating device 41 comprises a heating section and a heat-preserving section, so as to facilitate the steel plate heat treatment process.
Preferably, the second cooling device 42 is used for cooling the heated steel plate, wherein: the high-temperature section of 400-700 ℃ preferably adopts a protective gas circulation injection cooling (RJC) technology, the steel plate is rapidly cooled at a cooling speed of 20-60 ℃/s, the tempering brittleness is avoided, and the oxidation of the steel plate is prevented; and in the low-temperature section below 400 ℃, an air injection cooling (AJC) technology is adopted to cool the steel plate to room temperature in an air cooling mode, so that the internal tempering stress is reduced, and a stable tempered structure is obtained.
In one embodiment, as shown in fig. 1, each of the second heating devices 41 is configured with a feeding roller table, and the steel plate transferring device 3 is respectively engaged with each of the feeding roller tables; there is the station of going off the production line on the second steel sheet on the feed roll table, the station department of going off the production line is equipped with the second steel sheet that can carry out the operation of going off the production line or going on the production line of steel sheet to the feed roll table and goes up traditional thread binding putting 43 on the second steel sheet. The feeding roller way can be a conveying roller way and the like; the second steel plate wire feeding and discharging device 43 may be a steel plate crane, such as a vacuum chuck crane or a high precision disk crane. Based on this structure, can realize going up the offline of steel sheet and handle, make low temperature heat treatment unit have the function independence, improve production flexibility and reliability, also can improve unit equipment utilization simultaneously. Further, the steel plate transfer device 3 can be connected with the feeding roller way through the steel plate lifting device, and the equipment utilization rate of the steel plate lifting device is improved.
In one embodiment, as shown in fig. 1, the product collecting unit includes a finishing device 61 and a steel plate stacking section, each of the second cooling devices 42 is connected to an inlet of the finishing device 61, and an outlet of the finishing device 61 is connected to the steel plate stacking section. The finishing device 61 mainly comprises steel plate straightening equipment, a multi-roll straightener and/or a brush roll, and can straighten the steel plate, remove residual iron oxide scales on the surface of the steel plate and further improve the shape and the surface quality of the steel plate; when a multi-roll straightener is adopted, the upper roll of the multi-roll straightener is preferably pressed down by servo hydraulic pressure, the precision of the reduction is controlled to be +/-0.1 mm, the convexity of the lower roll is adjusted, the straightening of a steel plate with the maximum yield strength of 1800MPa can be realized, and the unevenness of the steel plate is ensured to be below 3/1000. In addition, preferably, the outlet of the finishing device 61 is configured with a meter and a plate shape meter for online real-time monitoring of the surface quality and the plate shape of the straightened steel plate, and feeding back the monitoring result to the finishing device 61, and the finishing device 61 automatically adjusts the straightening parameters in real time according to the feedback information to form closed-loop control.
For multiple sets of low-temperature heat treatment mechanisms connected in parallel, each low-temperature heat treatment mechanism may share one finishing device 61, and the steel plate output by each second cooling device 42 may be conveyed to the finishing device 61.
Further, as shown in fig. 1, each of the second cooling devices 42 is further connected to the steel plate stacking section through a bypass roller table, and two ends of the bypass roller table are respectively located at the feeding side and the discharging side of the finishing device 61; based on the design, the flexibility of system production can be improved, and steel plates which do not need to be finished can directly enter a steel plate stacking workshop section.
Further, as shown in fig. 1, a steel plate feeding station is provided on the steel plate conveying roller way on the feeding side of the finishing device 61 and a steel plate feeding device 5 is provided. The steel plate feeding device 5 can adopt a steel plate hoisting device in the form of a vacuum sucker crane or a high-precision magnetic disc crane and the like, and can hoist the steel plate outside the line to be fed, so that the function independence of a finishing machine set is realized, the production flexibility is improved, and the productivity and the benefit of finishing equipment are exerted to the greatest extent.
In one embodiment, as shown in fig. 1, the steel plate stacking section may include a plurality of sets of second stackers 63, and the steel plates output by the finishing device 61 may enter one set of second stackers 63; in the above scheme that the second cooling devices 42 are configured with bypass roller ways, the number of the second stackers 63 may be the same as the number of the low-temperature heat treatment mechanisms, and the second cooling devices 42 may be configured in a one-to-one correspondence manner, and each group of second cooling devices 42 may be connected to the corresponding second stackers 63 through the corresponding bypass roller ways. The second stacker 63 is preferably in a swinging horseshoe roller form and is hydraulically driven, so that the stacking rhythm and precision can be improved; the entrance to the second stacker 63 may be further provided with pinch rolls which may be used to assist in slowing down the steel sheet.
Further, a third shearing device 62 is arranged on the inlet side of the second stacker 63, and is mainly used for shearing operations such as fixed-length shearing of steel plates and the like so as to meet the requirements of users on steel plates with different lengths and can also be used for online sampling of the steel plates.
Example two
Referring to fig. 1, an embodiment of the present invention relates to a heat treatment production method for a high-strength steel strip, which is implemented based on the heat treatment production system for a multifunctional high-strength steel strip provided in the first embodiment;
the method comprises a roll-to-sheet continuous heat treatment mode and a sheet-to-sheet continuous heat treatment mode;
in the roll-plate continuous heat treatment mode, after being uncoiled by the uncoiling device 11, a raw material steel roll passes through the first shearing device 13, is treated by the first heating device 22 and the first cooling device 23, is sheared into a plate by the second shearing device 24, and the sheared steel plate enters the product collecting unit after being treated by the low-temperature heat treatment unit;
in the plate-plate continuous heat treatment mode, a raw material steel coil is uncoiled by the uncoiling device 11 and then is sheared into a plate by the first shearing device 13, and the sheared steel plate is treated by the first heating device 22 and the first cooling device 23, passes through the second shearing device 24, is treated by the low-temperature heat treatment unit, and then enters the product collection unit.
Further, the above method further comprises a plate-plate off-line heat treatment mode; the plate-to-plate off-line heat treatment mode comprises:
after the raw material steel coil is uncoiled by the uncoiling device 11, the raw material steel coil is sheared into a plate by the first shearing device 13, and the sheared steel plate is temporarily stored after being off the production line; according to production scheduling, temporarily stored steel plates are put on line, processed by the first heating device 22 and the first cooling device 23, passed through the second shearing device 24, processed by the low-temperature heat treatment unit and then enter the product collection unit; wherein, the steel plate can be processed by the first steel plate up-down line device 15;
and/or, temporarily storing the steel plate conveyed from the upstream of the low-temperature heat treatment unit off line, enabling the temporarily stored steel plate to be on line according to production scheduling, and then entering the product collection unit after being treated by the second heating device 41 and the second cooling device 42; in this case, the second steel plate take-up and take-down device 43 can be used to take up and take down the steel plates.
Further, the product collecting unit comprises a finishing device 61 and a steel plate stacking section; the product collection unit has at least one of the following steel plate finishing modes:
a continuous steel plate finishing mode, wherein the steel plates conveyed by the low-temperature heat treatment unit are finished by the finishing device 61 and then collected by the steel plate stacking section;
a continuous and non-finishing mode of the steel plate, wherein the steel plate conveyed by the low-temperature heat treatment unit directly enters the steel plate stacking section for collection, for example, the steel plate is directly conveyed by the bypass roller way;
and a steel plate off-line finishing mode, wherein an off-line steel plate outside the machine set (which can be realized by the steel plate on-line device 5) is finished by the finishing device 61 and then collected by the steel plate stacking section.
In one embodiment, the heat treatment production method for the high-strength steel plate strip comprises at least one of the following quenching and tempering heat treatment process, quenching heat treatment process, tempering heat treatment process and normalizing heat treatment process, preferably at least one of the following quenching and tempering heat treatment process, quenching heat treatment process, tempering heat treatment process and normalizing heat treatment process, and the corresponding heat treatment mode is selected according to the design production process of the produced steel plate.
(1) The quenching and tempering heat treatment process comprises the following steps:
s11, heating the steel plate or the steel strip conveyed from the upstream to a preset temperature T1 in the first heating device 22 at a preset heating speed V1, and keeping the temperature for T1 time to austenitize the steel structure;
s12, cooling the steel material output by the first heating device 22 to room temperature in the first cooling device 23 at a preset cooling speed V2 to obtain a quenched martensite structure in the steel material;
s13, heating the steel plate output by the high-temperature heat treatment unit in the second heating device 41 to a preset temperature T2, and keeping the temperature for T2 time to obtain a tempered martensite structure in the steel;
and S14, cooling the steel plate output by the second heating device 41 to room temperature in the first cooling device 23 to obtain a target product.
Preferably, in S11, the goal is to completely austenitize the steel structure, resulting in a uniform and fine equiaxed austenite structure. In one embodiment, V1 is in the range of 5 to 100 ℃/s; t1 is in the range of 900-1100 ℃; t1 is in the range of 2-10 min.
Preferably, in S12, the objective is to make the structure of the steel material a uniform and fine quenched martensite structure. In one embodiment, V2 is in the range of 50 to 200 ℃/s.
Preferably, in S13, by tempering and heating, internal stress of the steel can be eliminated, so that the structure of the steel is a tempered martensite structure, the ductility and toughness of the steel are improved, and the strength, the ductility and the toughness of the steel are reasonably matched. In one embodiment, T2 is in the range of 150-700 ℃ and T2 is in the range of 1-10 min.
Preferably, in S14, the structure of the target product is a tempered structure stable at room temperature; also, in this step, the development of temper brittleness during cooling should be avoided.
(2) The quenching heat treatment process comprises the following steps:
s21, heating the steel plate or the steel strip conveyed from the upstream to a preset temperature T3 in the first heating device 22 according to a preset heating speed V3, and preserving the heat for T3 time to enable the steel structure to be austenitized;
and S22, cooling the steel material output by the first heating device 22 to room temperature in the first cooling device 23 at a preset cooling speed V4 so as to obtain a quenched martensite structure in the steel material.
Preferably, in S21, the objective is to completely austenitize the steel structure to obtain a uniform and fine equiaxed austenite structure. In one embodiment, V3 is in the range of 5 to 100 ℃/s; t3 is in the range of 900-1100 ℃; t3 is within the range of 2-10 min.
Preferably, in S22, the objective is to make the structure of the steel material a uniform and fine quenched martensite structure. In one embodiment, V4 is in the range of 50 to 200 ℃/s.
(3) The normalizing heat treatment process comprises the following steps:
s31, heating the steel plate or the steel strip conveyed from the upstream to a preset temperature T4 in the first heating device 22 at a preset heating speed V5, and preserving the heat for T4 time to enable the steel structure to be austenitized;
s32, cooling the steel output by the first heating device 22 to room temperature in the first cooling device 23 at a preset cooling speed V6 to obtain a normalized structure in the steel;
preferably, in S31, the objective is to completely austenitize the steel structure to obtain a uniform and fine equiaxed austenite structure. In one embodiment, V5 is in the range of 5 to 100 ℃/s; t4 is in the range of 900-1100 ℃; t4 is within the range of 2-10 min.
Preferably, in S32, the aim is to make the structure of the steel material a uniform and fine normalized structure. In one embodiment, V6 is in the range of 10 to 50 ℃/s.
(4) The tempering heat treatment process comprises the following steps:
heating the steel material to a preset temperature T5 through a first heating device 22, keeping the temperature for T5 time to obtain a tempered martensite structure in the steel material, and then cooling to room temperature in a first cooling device 23 to obtain a target product;
alternatively, the steel material is heated to a predetermined temperature T5 by the second heating device 41 and kept at the temperature for T5 time to obtain a tempered martensite structure in the steel material, and then cooled to room temperature in the second cooling device 42 to obtain the target product.
Preferably, the internal stress of the steel can be eliminated through tempering and heating, so that the structure of the steel is a tempered martensite structure, the plastic toughness of the steel is improved, and the strength, the plasticity and the toughness of the steel are reasonably matched; the structure of the target product is a tempered structure stable at room temperature, and at the same time, in the cooling step, the generation of temper brittleness during the cooling process should be avoided. In one embodiment, T5 is in the range of 150-700 ℃ and T5 is in the range of 1-10 min.
The multifunctional high-strength steel plate strip heat treatment production system and the high-strength steel plate strip heat treatment production method provided by the embodiment can be suitable for heat treatment production of high-strength steel plate strips with the thickness specification of 1-30 mm and the width specification of 500-2200 mm, the maximum yield strength of a product can reach 1800MPa, the surface flatness of the product is less than 3/1000, and the surface quality and the surface cleanliness are less than Sa 2.5.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A heat treatment production system for a multifunctional high-strength steel plate strip is characterized by comprising a preparation unit, a high-temperature heat treatment unit, a low-temperature heat treatment unit and a product collection unit which are connected in sequence;
the preparation unit comprises an uncoiling device and a first shearing device;
the high-temperature heat treatment unit comprises a first heating device, a first cooling device, a second shearing device and a first stacker crane which are sequentially connected;
the low-temperature heat treatment unit comprises at least one group of low-temperature heat treatment mechanisms, and each low-temperature heat treatment mechanism comprises a second heating device and a second cooling device which are sequentially connected; when a plurality of groups of low-temperature heat treatment mechanisms are arranged, the low-temperature heat treatment mechanisms are arranged in parallel;
the first shearing device is connected with the first heating device through a steel conveying channel, and the first stacking machine is connected with each second heating device through a steel plate transfer device; each second cooling device is connected with the product collecting unit.
2. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 1, wherein: first shearing mechanism with steel transfer passage between the first heating device is last to be equipped with at least one first steel sheet station of going off the production line from top to bottom, first steel sheet station department of going off the production line from top to bottom is equipped with and can carry out the first steel sheet of steel sheet operation of going off the production line from bottom to bottom or the steel sheet operation of going on the production line from top to bottom to steel transfer passage.
3. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 2, wherein: the preparation unit further comprises a descaling device; the two upper and lower line stations of the first steel plate are respectively arranged at the upper and lower positions of the descaling device.
4. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 1, wherein: the product collecting unit comprises a finishing device and a steel plate stacking working section, each second cooling device is connected with a feeding port of the finishing device, and a discharging port of the finishing device is connected with the steel plate stacking working section.
5. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 4, wherein: each second cooling device is further connected with the steel plate stacking section through a bypass roller way, and two ends of the bypass roller way are respectively located on the feeding side and the discharging side of the finishing device.
6. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 4, wherein: and a steel plate feeding station and a steel plate feeding device are arranged on the steel plate conveying roller way on the feeding side of the finishing device.
7. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 4, wherein: the steel plate stacking section comprises a plurality of second stackers which are arranged in parallel.
8. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 7, wherein: and a third shearing device is arranged on the inlet side of each second stacker.
9. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 1, wherein: each second heating device is provided with a feeding roller way, and the steel plate transfer device is respectively connected with each feeding roller way; the feeding roller way is provided with a second steel plate feeding and discharging station, and the second steel plate feeding and discharging station is provided with a second steel plate feeding and discharging device capable of performing steel plate feeding or steel plate feeding operation on the feeding roller way.
10. The heat treatment production system of the multifunctional high-strength steel plate strip as claimed in claim 1, wherein: and a deviation correcting device is arranged on the inlet side of the first heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222196203.5U CN218435877U (en) | 2022-08-19 | 2022-08-19 | Multifunctional high-strength steel plate strip heat treatment production system |
Applications Claiming Priority (1)
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