CN115404332B - Heat treatment temperature compensation device and method for ultrathin high-strength plate strip steel - Google Patents
Heat treatment temperature compensation device and method for ultrathin high-strength plate strip steel Download PDFInfo
- Publication number
- CN115404332B CN115404332B CN202211141815.2A CN202211141815A CN115404332B CN 115404332 B CN115404332 B CN 115404332B CN 202211141815 A CN202211141815 A CN 202211141815A CN 115404332 B CN115404332 B CN 115404332B
- Authority
- CN
- China
- Prior art keywords
- temperature
- plate strip
- strip steel
- roller
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 144
- 239000010959 steel Substances 0.000 title claims abstract description 144
- 238000010438 heat treatment Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000010791 quenching Methods 0.000 claims abstract description 59
- 230000000171 quenching effect Effects 0.000 claims abstract description 59
- 238000005485 electric heating Methods 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 2
- -1 iron-chromium-aluminum Chemical compound 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims 1
- 239000002657 fibrous material Substances 0.000 claims 1
- 229910000734 martensite Inorganic materials 0.000 abstract description 9
- 238000001556 precipitation Methods 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000006032 tissue transformation Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005496 tempering Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention belongs to the technical field of steel heat treatment, and provides an ultrathin high-strength plate strip steel heat treatment temperature compensating device and a temperature compensating method. The temperature compensating device consists of a heat insulating shell, a transmission system and a temperature compensating system, the temperature compensating method consists of a temperature control method and a speed control method, and a control unit is used for making a temperature compensating rule and controlling the heating of an electric heating belt and the rotation of a transmission motor, so that the automatic temperature compensation of the plate strip steel after the plate strip steel is discharged from a heat treatment furnace is realized, and the process requirements of the cooling temperature before quenching, the air cooling temperature reduction of the plate strip steel and the like are met. The invention effectively avoids adverse tissue transformation such as non-martensitic transformation, coarse grains, carbide precipitation and the like before quenching the plate strip steel, improves the quenching plate shape, residual stress after quenching, performance uniformity and toughness performance of the ultra-thin high-strength plate strip steel, and improves the heat treatment quality of the plate strip steel.
Description
Technical Field
The invention relates to the technical field of steel heat treatment, in particular to an ultrathin high-strength plate strip steel heat treatment temperature compensating device and a temperature compensating method.
Background
The tempering heat treatment is a key process for improving the toughness and special service performance of the extremely thin high-strength plate strip steel. After the plate strip steel is rolled and formed, the grain refinement and carbide distribution homogenization are carried out by austenitizing heating (normalizing), then martensite or lower bainite structure is obtained by quenching at a speed higher than critical cooling speed, so as to improve the toughness and special service performance, and finally the quenching structure is transformed into a stable tempering structure by tempering, so that the internal stress of the plate strip steel is eliminated, and the corresponding structure transformation and toughness proportion are ensured. In the quenching and tempering heat treatment (normalizing-quenching-tempering) process of the plate strip steel, different process paths are realized through a complex heating-cooling system, comprehensive toughening mechanisms such as fine crystals, phase changes, precipitation, solid solutions, element diffusion and the like are fully exerted, the strength of the plate strip steel is improved, the toughness, stress distribution and performance uniformity are improved, the regulation and control requirements of different structures such as fine crystals, dispersion precipitation, gradient structures, composite phase changes and the like are met, and new service performance is given to the material.
With the reduction of the thickness (for example, 1-4 mm thick) of the plate strip steel and the improvement of the strength level (for example, the yield strength is more than 1000 MPa), the heat treatment sensitivity is obviously increased, the problems of high residual stress, high heat treatment distortion, substandard toughness, poor surface quality and the like are easily caused, the heat treatment yield and the production efficiency are affected, even the heat treatment production cannot be carried out on certain specifications and certain products of plate strip steel, and the research, the development and the application of the extremely thin high-strength plate strip steel are limited. Production practice shows that the length of the transfer time (air cooling time) between the plate strip steel exiting the normalizing furnace and entering the quenching equipment and the temperature before quenching the plate strip steel directly determine the structure and the performance after quenching, and the transfer time and the temperature before quenching the plate strip steel are in inverse proportion under the condition of the prior equipment technical level. When the thickness of the plate strip steel is reduced to 1-4 mm, the temperature of the plate strip steel in the transfer time is rapidly reduced, even the temperature before quenching is lower than the austenite decomposition temperature (Ar 1) or the ferrite starting precipitation temperature (Ar 3), non-martensitic structures such as proeutectoid ferrite, pearlite and the like are generated, the structures are left to the end of quenching, the toughness of the plate strip steel is obviously reduced, and the problems of stress concentration, uneven structure distribution and the like are generated.
In order to avoid the generation of non-martensitic structure during the heat treatment of the above-mentioned plate strip steel, the following three methods are generally adopted. (1) The moving speed of the plate strip steel is improved to shorten the transferring time: because the plate strip steel outlet normalizing furnace speed is determined by the quenching process speed, which is determined by a plurality of factors such as the critical cooling speed of the plate strip steel, the capacity of a quenching device, the quenching plate shape and the like, the problem that the quenching plate shape does not reach the standard, the residual stress is large and the like can be generated when the moving speed of the plate strip steel is increased, so that the implementation of the mode is difficult; (2) the distance between the normalizing furnace and the quenching device is shortened, and the air cooling distance is further reduced: the discharging furnace door, the temperature detection and plate strip steel tracking device, the quenching machine water retaining device, the purging device and the like are arranged in the distance, the space distance is very narrow, and the baking of the normalizing furnace to the quenching device is aggravated due to the reduced distance, so that the implementation of the mode is difficult; (3) raising the temperature of the plate strip steel before quenching: by designing the temperature compensation device and developing the temperature compensation method, the plate and strip steel with different thickness and steel grade is subjected to temperature compensation to a certain temperature after being discharged from the normalizing furnace, and the non-martensitic transformation is prevented from occurring before quenching, so that the method is not influenced by the process and the device position, and has feasibility.
The invention aims to improve the temperature before quenching of the extremely thin high-strength plate strip steel, shorten the air cooling time, prevent adverse tissue transformation such as non-martensitic transformation, coarse grains, carbide precipitation and the like from occurring before quenching, improve the quenching plate shape, performance uniformity and toughness performance of the extremely thin high-strength plate strip steel and improve the quenching quality by researching and developing a plate strip steel temperature compensating device and a temperature compensating method after a normalizing furnace and before a quenching device.
In the prior art, chinese patent application (publication No. CN 212800440U) discloses a temperature compensating mechanism for heating the surface of a metal product requiring secondary quenching. The mechanism is used for supplementing temperature for metal parts, and the temperature supplementing object, the mechanism form and the realization function are greatly different from those of the invention.
Chinese patent application (publication No. CN106643135 a) discloses a temperature compensating system for a rolling process of rolled pieces, which is used for compensating temperature of rolled pieces and improving temperature uniformity of the whole plate when long rolled pieces are produced in batch. The system is installed near the rolling mill, and the realization function and the mechanism form are greatly different from those of the invention.
Chinese patent application (publication No. CN112170506 a) discloses a method and apparatus for temperature compensation of a magnesium alloy sheet and strip conveying roller, wherein the temperature difference between the upper surface and the lower surface of the sheet and strip is adjusted by the conveying roller, so as to realize uniform thickness-wise temperature distribution. The device and the method are implemented by the object, the temperature compensation mode and the temperature compensation purpose, and are greatly different from the invention.
Disclosure of Invention
Aiming at the technical bottleneck problems of non-martensitic structure generation, large residual stress and poor structure uniformity in the quenching process of the plate strip steel caused by rapid temperature drop and low quenching and cooling temperature after the existing ultrathin high-strength plate strip steel is discharged out of a heat treatment furnace, the invention aims to provide the heat treatment temperature compensation device and the temperature compensation method for the ultrathin high-strength plate strip steel, which can realize the quenching heat treatment production of the plate strip steel with high flatness and low residual stress and meet the heat treatment requirements of meeting the standard of the plate strip steel structure performance and the toughness.
The technical scheme of the invention is as follows:
the heat treatment temperature compensating device for the ultrathin high-strength plate strip steel is arranged between a roller hearth heat treatment furnace 6 and a roller quenching machine 7 and mainly comprises a heat insulation shell 3, a transmission system 4 and a temperature compensating system 5;
the heat insulation shell 3 comprises a steel shell 8, a heat insulation layer 9, a Gao Wenruan curtain 10 and a slag discharging connecting rod 11; the steel shell 8 is a cuboid, is positioned on the outer layer of the temperature compensating device 1, and a heat insulating layer 9 is paved on the inner side of the steel shell 8; of the four sides of the steel shell 8, the side facing the roller hearth heat treatment furnace 6 is provided with a feed inlet 12, and the side facing the roller quenching machine (7) is provided with a discharge outlet 13; the lower ends of the other two side surfaces are provided with a support 20, the heat insulation shell 3 is arranged on a roller way beam 21 of the roller quenching machine 7 through the support 20, one of the two side surfaces is provided with a roller way round hole 17, the other side surface is provided with a roller way round hole 17 and an electric heating belt round hole 18, and the electric heating belt round hole 18 is positioned above the roller way round hole 17; the top end of the steel shell 8 is provided with a thermocouple round hole 19 penetrating through the heat insulation layer 9; the bottom end of the steel shell 8 is provided with a detachable slag discharging cover 14; the end part of the slag discharging cover 14 is provided with a connecting shaft 15, the connecting shaft 15 is connected with one end of a slag discharging connecting rod 11, and the other end of the slag discharging connecting rod 11 is fixed on a fixing mechanism 16 at the bottom end of the steel shell 8 through another rotating shaft 15; the outer side of the side wall of the discharge hole 13 side of the steel shell 8 is provided with a high-temperature-resistant soft curtain 10;
the transmission system 4 comprises a roller way 22, a transmission motor 23 and a rotary encoder 24; the roller way 22 penetrates through the steel shell 8 through the roller way round hole 17, two ends of the roller way 22 are arranged on a roller way beam 21 of the roller quenching machine 7, and one end of the roller way 22 is sequentially connected with a transmission motor 23 and a rotary encoder 24; the rotary encoder 24 is connected with the control unit 27 for speed feedback; the control unit 27 is connected with the transmission motor 23 for speed control;
the temperature compensating system 5 comprises an electric heating belt 25 and a thermocouple 26; the electric heating belt 25 is arranged in a serpentine shape on the inner side of the heat insulation layer 9 above the sides of the feed inlet 12 and the discharge outlet 13; one end of the thermocouple 26 is inserted into the steel shell 8 through the thermocouple round hole 19, and the other end of the thermocouple is connected with the control unit 27 for temperature feedback; the end of the electric heating belt 25 is connected to the control unit 27 through the electric heating belt circular hole 18, and the control unit 27 performs temperature control on the electric heating belt 25.
The feed inlet 12 and the discharge outlet 13 are horizontally and concentrically arranged; two electric heating belt round holes 18 are arranged.
The steel shell 8 and the roller way 22 are made of heat-resistant steel; the heat insulation layer 9 is made of ceramic fiber; the electric heating belt 25 is made of high-temperature iron-chromium-aluminum, and the heating temperature range is 700-980 ℃.
The wall thickness of the steel shell 8 is 5mm; the wall thickness of the heat insulation layer 9 is 80mm; the length of the feed inlet 12 and the discharge outlet 13 is 2200mm, and the height is 100mm; the slag discharging cover 14 has a length of 400mm and a width of 200mm; the diameter of the round hole 17 of the roller way is 150mm, and the center of the round hole is 225mm away from the outer wall of the bottom of the steel shell 8; the diameter of the circular hole 18 of the electric heating belt is 34mm, and the center of the circular hole is 515mm away from the outer wall of the bottom of the steel shell 8; the diameter of the thermocouple round hole 19 is 12mm; the diameter of the roller table 22 is 146mm.
The power of the transmission motor 23 is 2.2kW; the linear speed range of the roller way 22 is 2-60 m/min; after the plate strip steel 2 is heated, the plate strip steel is discharged out of the roller hearth type heat treatment furnace 6 and is carried and transported to the roller quenching machine 7 by the roller way 22.
A heat treatment temperature compensation method for ultra-thin high-strength plate strip steel mainly comprises a temperature control method 28 and a speed control method 29; before the heating of the plate strip steel 2 is finished and the roller hearth heat treatment furnace 6 is prepared, the temperature of the temperature compensating device 1 is controlled by a temperature control method 28 to meet the cooling temperature before the quenching of the plate strip steel 2, the linear speed of a roller way is controlled by a speed control method 29 to meet the air cooling temperature drop requirement of the plate strip steel 2; in the process of discharging the plate strip steel 2 from the roller hearth type heat treatment furnace 6 and entering the roller type quenching machine 7, the roller linear speed of the roller hearth type heat treatment furnace 6, the roller linear speed of the temperature compensating device 1 and the roller linear speed of the roller type quenching machine 7 are consistent.
The temperature control method 28 specifically includes that the thermocouple 26 measures the temperature compensation temperature of the temperature compensation device 1 and feeds the temperature compensation temperature back to the control unit 27, and the control unit 27 controls the output current of the electric heating belt 25 in a PID closed loop control mode so as to control the temperature compensation temperature inside the temperature compensation device 1; when the thickness of the plate strip steel is epsilon [1,2] mm, the temperature compensation temperature=the tapping temperature of the plate strip steel +20 ℃; the temperature compensation temperature=the tapping temperature of the plate strip steel +15 ℃ when the thickness of the plate strip steel is 2,3 mm, the temperature compensation temperature=the tapping temperature of the plate strip steel +10 ℃ when the thickness of the plate strip steel is 3, 4mm, and the temperature compensation temperature control precision is not more than 5 ℃.
The speed control method 29 specifically comprises the steps that the rotary encoder 24 calculates the linear speed of the roller way of the temperature compensating device 1 and feeds the linear speed back to the control unit 27, the control unit 27 controls the rotating speed of the transmission motor 23 in a PID closed-loop control mode, and further controls the linear speed of the roller way, and the control precision of the linear speed of the roller way is not more than 0.1m/min; the roller linear speed of the plate strip steel 2 is calculated according to the following formula, wherein H is the thickness of the plate strip steel, the unit is mm, and V is the roller linear speed, the unit is m/min;
the invention has the beneficial effects that:
the heat treatment temperature compensation device and the temperature compensation method for the ultrathin high-strength plate strip steel effectively reduce the air cooling temperature drop after the plate strip steel is discharged from the roller hearth type heat treatment furnace, improve the quenching and cooling temperature of the plate strip steel, avoid adverse tissue transformation such as non-martensitic transformation, coarse grains, carbide precipitation and the like before the plate strip steel is quenched, improve the quenching plate shape, residual stress after quenching, performance uniformity and toughness performance of the ultrathin high-strength plate strip steel, and improve the quenching quality. The implementation effect proves that the temperature compensation temperature before the quenching of the plate strip steel is above 870 ℃, the temperature compensation temperature control precision is +/-5 ℃, and the continuous and stable heat treatment production of the ultrathin high-strength plate strip steel is realized.
Drawings
FIG. 1 is a schematic diagram of a heat treatment temperature compensation device and a temperature compensation method for an ultrathin high-strength plate strip steel in the invention;
FIG. 2 is a cross-sectional view of the heat treatment temperature compensating device for the ultrathin high-strength plate strip steel in the invention;
FIG. 3 is a diagram of the heat insulation shell and the electric heating belt of the heat treatment temperature compensation device for the ultrathin high-strength plate strip steel.
In the figure, 1 a temperature compensating device; 2 plate strip steel; 3, heat insulation shell; 4, a transmission system; 5, a temperature supplementing system; 6 roller hearth heat treatment furnaces; 7 roller quenching machine; 8, a steel shell; 9, a heat insulation layer; 10 high Wen Ruanlian; 11 slag discharging connecting rods; 12 feed inlets; 13, a discharge hole; 14, a slag discharging cover; 15 a rotation shaft; 16 a fixing mechanism; 17 round holes of roller tables; 18 electric heating belt round holes; 19 thermocouple round holes; 20 supports; 21 roller bed beams; a 22 roller way; 23 a transmission motor; 24 a rotary encoder; 25 electric heating belt; 26 thermocouple; 27 a control unit; 28 temperature control method; 29 speed control method.
Detailed Description
A continuous quenching of a high-strength plate strip steel with the thickness of 2mm and the width of 2000mm is taken as an example, and a specific implementation mode of the heat treatment temperature compensation device and the temperature compensation method of the extremely thin high-strength plate strip steel is described with reference to figures 1-3. The temperature compensating device 1 is arranged between the roller hearth heat treatment furnace 6 and the roller quenching machine 7, and is arranged on a roller way beam 21 of the roller quenching machine 7 through a support 20, and a roller way round hole 17, an electric heating belt round hole 18 and a thermocouple round hole 19 are respectively designed on a heat insulating shell 3 of the temperature compensating device 1 and are used for installing a roller way 22, an electric heating belt 25 inlet and outlet wire and a thermocouple 26. Before the plate strip steel 2 is discharged from the roller bottom type heat treatment furnace 6, a control unit 27 of the temperature compensating device 1 is started, the target heating temperature of the temperature compensating device 1 is calculated to be 920 ℃ according to a temperature control method 28, and the linear speed of a roller way is calculated to be 6.4m/min according to a speed control method 29; the control unit 27 controls the electric heating belt 25 of the temperature compensating system 5 to pass through current in a PID control mode, so as to meet the temperature requirement of 920+/-5 ℃ in the temperature compensating device 1, and feeds back the temperature in the temperature compensating device 1 in real time through the thermocouple 26 to participate in temperature closed-loop control; the control unit 27 controls the rotating speed of the transmission motor 23 of the transmission system 4 in a PID control mode, meets the linear speed requirement of the roller way of 6.4+/-0.1 m/min, feeds back the linear speed of the roller way in real time through the rotary encoder 24, and participates in closed-loop control of the speed; after the preparation, the plate strip steel 2 enters the roller hearth type heat treatment furnace 6 at the speed of 6.4m/min, enters the steel shell 8 and the feeding hole 12 of the heat insulation layer 9 on the side facing the roller hearth type heat treatment furnace 6, the electric heating belt 25 completes the temperature compensation heating, the roller way 22 completes the bearing and transportation of the plate strip steel 2 in the temperature compensation device 1, and then leaves the temperature compensation device 1 at the speed of 6.4m/min through the steel shell 8 and the discharging hole 13 of the heat insulation layer 9 on the side facing the roller quenching machine 7, and enters the roller quenching machine 7 through the high temperature resistant soft curtain 10 to complete the quenching.
After the plate strip steel 2 of the embodiment completely exits the temperature compensating device 1, if the specification of the next plate strip steel is the same as that of the plate strip steel 2 of the embodiment, the control parameters of the temperature compensating device 1 are unchanged, if the specification of the next plate strip steel is changed, the target heating temperature and the roller linear velocity are recalculated according to the temperature control method 28 and the velocity control method 29, and the heating temperature and the roller linear velocity of the temperature compensating device 1 are respectively adjusted by controlling the electric heating belt 25 and the transmission motor 23 by the control unit 27.
When more iron scales of the strip steel 2 are accumulated in the temperature compensating device 1 after long-time production, the slag discharging cover 14 at the lower part of the temperature compensating device 1 is opened in a non-production state, the slag discharging cover 14 is connected to the fixing mechanism 16 through the rotating shaft 15 and the slag discharging connecting rod 11, and the slag discharging cover 14 is covered again after the iron scales in the temperature compensating device 1 are removed.
So far, the heat treatment temperature compensation device and the temperature compensation method of the ultrathin high-strength plate strip steel are implemented.
The heat treatment process of the extremely thin and high-strength plate strip steel with the thickness of 2mm and the width of 2000mm does not adopt a temperature compensation device and a temperature compensation method, and compared with the process adopting the temperature compensation device and the temperature compensation method, the quenching and cooling temperature of the plate strip steel is obviously improved, the non-martensitic transformation is avoided, and the flatness of the quenched plate shape of the plate strip steel is obviously improved, as shown in the table below.
Claims (7)
1. The heat treatment temperature compensating device for the ultrathin high-strength plate strip steel is characterized in that the temperature compensating device (1) is arranged between a roller hearth heat treatment furnace (6) and a roller quenching machine (7) and mainly comprises a heat insulation shell (3), a transmission system (4) and a temperature compensating system (5);
the heat insulation shell (3) comprises a steel shell (8), a heat insulation layer (9), a Gao Wenruan-resistant curtain (10) and a slag discharging connecting rod (11); the steel shell (8) is a cuboid, is positioned at the outer layer of the temperature compensating device (1), and a heat insulating layer (9) is paved at the inner side of the steel shell (8); of the four side surfaces of the steel shell (8), the side surface facing the roller hearth heat treatment furnace (6) is provided with a feed inlet (12), and the side surface facing the roller quenching machine (7) is provided with a discharge outlet (13); the lower ends of the other two side surfaces are provided with a support (20), the heat insulation shell (3) is arranged on a roller beam (21) of the roller quenching machine (7) through the support (20), one of the two side surfaces is provided with a roller way round hole (17), the other side surface is provided with a roller way round hole (17) and an electric heating belt round hole (18), and the electric heating belt round hole (18) is positioned above the roller way round hole (17); the top end of the steel shell (8) is provided with a thermocouple round hole (19) penetrating through the heat insulation layer (9); the bottom end of the steel shell (8) is provided with a detachable slag discharging cover (14); the end part of the slag discharging cover (14) is provided with a connecting shaft (15), the connecting shaft (15) is connected with one end of a slag discharging connecting rod (11), and the other end of the slag discharging connecting rod (11) is fixed on a fixing mechanism (16) at the bottom end of the steel shell (8) through the other rotating shaft (15); the outer side of the side wall of the discharge hole (13) side of the steel shell (8) is provided with a height-resistant Wen Ruanlian (10);
the transmission system (4) comprises a roller way (22), a transmission motor (23) and a rotary encoder (24); the roller way (22) penetrates through the steel shell (8) through the roller way round hole (17), two ends of the roller way (22) are arranged on a roller way beam (21) of the roller quenching machine (7), and one end of the roller way is sequentially connected with a transmission motor (23) and a rotary encoder (24); the rotary encoder (24) is connected with the control unit (27) for speed feedback; the control unit (27) is connected with the transmission motor (23) for speed control;
the temperature compensating system (5) comprises an electric heating belt (25) and a thermocouple (26); the electric heating belt (25) is arranged at the inner side of the heat insulation layer (9) above the side where the feeding hole (12) and the discharging hole (13) are positioned in a serpentine manner; one end of a thermocouple (26) is inserted into the steel shell (8) through a thermocouple round hole (19), and the other end of the thermocouple is connected with a control unit (27) for temperature feedback; the end part of the electric heating belt (25) is connected to a control unit (27) through an electric heating belt round hole (18), and the control unit (27) controls the temperature of the electric heating belt (25);
the thermocouple (26) measures the temperature compensation temperature of the temperature compensation device (1) and feeds the temperature compensation temperature back to the control unit (27), and the control unit (27) controls the output current of the electric heating belt (25) in a PID closed-loop control mode so as to control the temperature compensation temperature inside the temperature compensation device (1); when the thickness of the plate strip steel is epsilon [1,2] mm, the temperature compensation temperature=the tapping temperature of the plate strip steel +20 ℃; the temperature compensation temperature=the tapping temperature of the plate strip steel +15 ℃ when the thickness of the plate strip steel is 2,3 mm, the temperature compensation temperature=the tapping temperature of the plate strip steel +10 ℃ when the thickness of the plate strip steel is 3, 4mm, and the temperature compensation temperature control precision is not more than 5 ℃.
2. The heat treatment temperature compensation device for the ultrathin high-strength plate strip steel according to claim 1, wherein the feeding hole (12) and the discharging hole (13) are horizontally and concentrically arranged; two electric heating belt round holes (18) are arranged.
3. The heat treatment temperature compensation device for the ultrathin high-strength plate strip steel according to claim 1 or 2, wherein the steel shell (8) and the roller way (22) are made of heat-resistant steel; the heat insulation layer (9) is made of ceramic fiber materials; the electric heating belt (25) is made of high-temperature iron-chromium-aluminum, and the heating temperature range is 700-980 ℃.
4. The heat treatment temperature compensating device for the ultrathin high-strength plate strip steel according to claim 3, wherein the wall thickness of the steel shell (8) is 5mm; the wall thickness of the heat insulation layer (9) is 80mm; the length of the feed inlet (12) and the discharge outlet (13) is 2200mm, and the height is 100mm; the slag discharging cover (14) is 400mm long and 200mm wide; the diameter of the round hole (17) of the roller way is 150mm, and the center of the round hole is 225mm away from the outer wall of the bottom of the steel shell (8); the diameter of the circular hole (18) of the electric heating belt is 34mm, and the center of the circular hole is 515mm away from the outer wall of the bottom of the steel shell (8); the diameter of the thermocouple round hole (19) is 12mm; the diameter of the roller way (22) is 146mm.
5. The heat treatment temperature compensating device for the ultrathin high-strength plate strip steel according to claim 3, wherein the power of the transmission motor (23) is 2.2kW; the linear speed range of the roller way (22) is 2-60 m/min; after the plate strip steel (2) is heated and discharged out of the roller hearth type heat treatment furnace (6), the plate strip steel is carried and transported to a roller quenching machine (7) by a roller way (22).
6. The heat treatment temperature compensation method for the ultrathin high-strength plate strip steel is characterized by mainly comprising a temperature control method (28) and a speed control method (29); before the heating of the plate strip steel (2) is finished and the roller hearth heat treatment furnace (6) is prepared, the temperature of the temperature compensating device (1) is controlled by a temperature control method (28), the cooling temperature before quenching of the plate strip steel (2) is met, the roller line speed is controlled by a speed control method (29), and the air cooling temperature drop requirement of the plate strip steel (2) is met; in the process that the plate strip steel (2) goes out of the roller hearth heat treatment furnace (6) and enters the roller quenching machine (7), the roller linear speed of the roller hearth heat treatment furnace (6) and the roller linear speed of the temperature compensating device (1) are consistent; the temperature control method (28) is characterized in that a thermocouple (26) measures the temperature compensation temperature of the temperature compensation device (1) and feeds the temperature compensation temperature back to a control unit (27), and the control unit (27) controls the output current of the electric heating belt (25) in a PID closed-loop control mode so as to control the temperature compensation temperature inside the temperature compensation device (1); when the thickness of the plate strip steel is epsilon [1,2] mm, the temperature compensation temperature=the tapping temperature of the plate strip steel +20 ℃; the temperature compensation temperature=the tapping temperature of the plate strip steel +15 ℃ when the thickness of the plate strip steel is 2,3 mm, the temperature compensation temperature=the tapping temperature of the plate strip steel +10 ℃ when the thickness of the plate strip steel is 3, 4mm, and the temperature compensation temperature control precision is not more than 5 ℃.
7. The heat treatment temperature compensation method of the ultrathin high-strength plate strip steel according to claim 6, wherein the speed control method (29) is characterized in that a rotary encoder (24) measures and calculates the linear speed of a roller way of the temperature compensation device (1) and feeds the linear speed back to a control unit (27), the control unit (27) controls the rotating speed of a transmission motor (23) in a PID closed-loop control mode so as to further control the linear speed of the roller way, and the control precision of the linear speed of the roller way is not more than 0.1m/min; the roller linear speed of the plate strip steel (2) is calculated according to the following formula, wherein H is the thickness of the plate strip steel, the unit mm and V is the roller linear speed, and the unit m/min;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211141815.2A CN115404332B (en) | 2022-09-20 | 2022-09-20 | Heat treatment temperature compensation device and method for ultrathin high-strength plate strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211141815.2A CN115404332B (en) | 2022-09-20 | 2022-09-20 | Heat treatment temperature compensation device and method for ultrathin high-strength plate strip steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115404332A CN115404332A (en) | 2022-11-29 |
| CN115404332B true CN115404332B (en) | 2024-01-16 |
Family
ID=84166020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211141815.2A Active CN115404332B (en) | 2022-09-20 | 2022-09-20 | Heat treatment temperature compensation device and method for ultrathin high-strength plate strip steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115404332B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000063955A (en) * | 1998-08-12 | 2000-02-29 | Nkk Corp | Production of thin dual-phase hot rolled steel strip |
| US6264767B1 (en) * | 1995-06-07 | 2001-07-24 | Ipsco Enterprises Inc. | Method of producing martensite-or bainite-rich steel using steckel mill and controlled cooling |
| CN101928811A (en) * | 2009-06-23 | 2010-12-29 | 宝山钢铁股份有限公司 | Steel plate quenching method based on model control |
| CN102453846A (en) * | 2010-10-18 | 2012-05-16 | 宝山钢铁股份有限公司 | Heat treatment method for corrosion resistant alloy N08810 steel plate |
| CN102873091A (en) * | 2012-10-23 | 2013-01-16 | 武汉钢铁(集团)公司 | Preparation method for wear-resistant steel and carbon structural steel composite plates |
| CN103249847A (en) * | 2010-11-10 | 2013-08-14 | Posco公司 | Method for manufacturing high-strength cold-rolled/hot-rolled trip steel having a tensile strength of 590 mpa grade, superior workability, and low mechanical-property deviation |
| CN204151383U (en) * | 2014-09-23 | 2015-02-11 | 中冶赛迪工程技术股份有限公司 | A kind of sheet metal quenching device |
| CN106825066A (en) * | 2016-12-26 | 2017-06-13 | 中国重型机械研究院股份公司 | The concentration rolling system and method heated with duration for batch rolled piece isothermal |
| KR20180060352A (en) * | 2016-11-29 | 2018-06-07 | 주식회사 에스에이씨 | Stainless strip continuous annealing furnace for preventing heat loss |
| CN110129543A (en) * | 2019-05-27 | 2019-08-16 | 东北大学 | A kind of quenching process of the very thin Strip based on rolled quenching machine |
| CN111910060A (en) * | 2020-08-19 | 2020-11-10 | 山东钢铁股份有限公司 | Unconstrained quenching machine and unconstrained quenching process for thin and wide plates |
| WO2021052315A1 (en) * | 2019-09-19 | 2021-03-25 | 宝山钢铁股份有限公司 | 30crmo hot rolled steel sheet/strip and production method therefor |
| CN113088647A (en) * | 2021-04-02 | 2021-07-09 | 莱芜钢铁集团银山型钢有限公司 | Automatic control method for quenching cooling |
-
2022
- 2022-09-20 CN CN202211141815.2A patent/CN115404332B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264767B1 (en) * | 1995-06-07 | 2001-07-24 | Ipsco Enterprises Inc. | Method of producing martensite-or bainite-rich steel using steckel mill and controlled cooling |
| JP2000063955A (en) * | 1998-08-12 | 2000-02-29 | Nkk Corp | Production of thin dual-phase hot rolled steel strip |
| CN101928811A (en) * | 2009-06-23 | 2010-12-29 | 宝山钢铁股份有限公司 | Steel plate quenching method based on model control |
| CN102453846A (en) * | 2010-10-18 | 2012-05-16 | 宝山钢铁股份有限公司 | Heat treatment method for corrosion resistant alloy N08810 steel plate |
| CN103249847A (en) * | 2010-11-10 | 2013-08-14 | Posco公司 | Method for manufacturing high-strength cold-rolled/hot-rolled trip steel having a tensile strength of 590 mpa grade, superior workability, and low mechanical-property deviation |
| CN102873091A (en) * | 2012-10-23 | 2013-01-16 | 武汉钢铁(集团)公司 | Preparation method for wear-resistant steel and carbon structural steel composite plates |
| CN204151383U (en) * | 2014-09-23 | 2015-02-11 | 中冶赛迪工程技术股份有限公司 | A kind of sheet metal quenching device |
| KR20180060352A (en) * | 2016-11-29 | 2018-06-07 | 주식회사 에스에이씨 | Stainless strip continuous annealing furnace for preventing heat loss |
| CN106825066A (en) * | 2016-12-26 | 2017-06-13 | 中国重型机械研究院股份公司 | The concentration rolling system and method heated with duration for batch rolled piece isothermal |
| CN110129543A (en) * | 2019-05-27 | 2019-08-16 | 东北大学 | A kind of quenching process of the very thin Strip based on rolled quenching machine |
| WO2021052315A1 (en) * | 2019-09-19 | 2021-03-25 | 宝山钢铁股份有限公司 | 30crmo hot rolled steel sheet/strip and production method therefor |
| CN111910060A (en) * | 2020-08-19 | 2020-11-10 | 山东钢铁股份有限公司 | Unconstrained quenching machine and unconstrained quenching process for thin and wide plates |
| CN113088647A (en) * | 2021-04-02 | 2021-07-09 | 莱芜钢铁集团银山型钢有限公司 | Automatic control method for quenching cooling |
Non-Patent Citations (1)
| Title |
|---|
| DP590薄规格热轧双相钢的组织与性能研究;杨春宇;中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑(第04期);B022-414 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115404332A (en) | 2022-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0787541B1 (en) | Method of manufacturing seamless steel pipes and manufacturing equipment therefor | |
| CN103313812B (en) | Energy- and yield-optimized method and plant for producing hot steel strip | |
| CN101319270B (en) | Thermal treatment method for improving mechanical performances of normalized steel plate | |
| KR19980072267A (en) | Heating and cooling methods of non-alloyed steel and apparatus | |
| CN108517465A (en) | A kind of niobium titanium chromium-boron alloy abrasion-resistant stee and preparation method thereof | |
| CN108330386B (en) | Steel for saw blade and production method of hot rolled steel plate thereof | |
| CN115404332B (en) | Heat treatment temperature compensation device and method for ultrathin high-strength plate strip steel | |
| CZ149186A3 (en) | Process of steel wires heat treatment and apparatus for making the same | |
| CN108393456B (en) | Q345B thick plate casting blank structure control method | |
| JP4627025B2 (en) | Rolling equipment | |
| US4165246A (en) | Process for the heat treatment of thick walled steel pipes | |
| CN106191393A (en) | A kind of novel three-stage non-oxidation continuous annealer | |
| CN102363829A (en) | Heat treatment system used for producing ultrahigh strength steel | |
| CN104726764B (en) | Production method of non-oriented electrical steel | |
| CN101443144A (en) | Method and strand-guiding device for guiding a cast strand | |
| US20170183757A1 (en) | Hot stamping method for manufacturing vehicle body parts | |
| EP1444371B1 (en) | In-line process for the recrystallization of solidified coarse strips in carbon steel and in low-alloyed steel | |
| EP0969106A1 (en) | Rotary hearth furnace and its operating method | |
| CN105543455A (en) | Induction heat treatment process method of composite steel plate | |
| CN104907518B (en) | A kind of stainless steel slab slow cooling temperature control equipment and control method | |
| CN107876564A (en) | A kind of ferrite rolling control device and its control technique | |
| JP2009082931A (en) | System for performing controlled cooling of steel bar | |
| JP6295387B1 (en) | Controlled cooling method for hot-rolled steel bars | |
| CN103014298B (en) | Supporting roll inverter power supply differential temperature quenching device and heat treatment method | |
| KR20130075827A (en) | Apparatus for transferring slab of heating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |