CN108998634B - Production device for ultrahigh-strength steel plate - Google Patents
Production device for ultrahigh-strength steel plate Download PDFInfo
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- CN108998634B CN108998634B CN201810994753.7A CN201810994753A CN108998634B CN 108998634 B CN108998634 B CN 108998634B CN 201810994753 A CN201810994753 A CN 201810994753A CN 108998634 B CN108998634 B CN 108998634B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 91
- 239000010959 steel Substances 0.000 claims abstract description 91
- 230000007246 mechanism Effects 0.000 claims abstract description 61
- 238000005096 rolling process Methods 0.000 claims abstract description 52
- 238000010791 quenching Methods 0.000 claims abstract description 24
- 230000000171 quenching effect Effects 0.000 claims abstract description 24
- 230000032683 aging Effects 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 33
- 230000006698 induction Effects 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 23
- 229910052802 copper Inorganic materials 0.000 claims description 23
- 239000010949 copper Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000005485 electric heating Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 13
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000004321 preservation Methods 0.000 abstract description 3
- 229910000734 martensite Inorganic materials 0.000 description 7
- 238000005097 cold rolling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000002431 foraging effect Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003562 lightweight material Substances 0.000 description 2
- 238000010274 multidirectional forging Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241000237942 Conidae Species 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Classifications
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- 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- 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
- Y02P10/25—Process efficiency
Abstract
The production device of the ultrahigh-strength steel plate is mainly characterized in that an online quenching mechanism is arranged on a working rack in front of a rolling mechanism of the existing production line, an electric field auxiliary rolling mechanism is arranged on the rolling mechanism, and an aging treatment furnace is arranged on the working rack behind the rolling mechanism. The invention greatly improves the production device of the conventional high-strength steel plate, adopts an on-line quenching mechanism, has the advantages of high heating speed, no heat preservation time, stable and accurate cooling speed and cooling temperature, higher hardness than that of the general quenched workpiece, less deformation after quenching, simple and efficient processing process, greatly simplifies the complicated processes in the production process of the conventional high-strength steel plate, mechanizes and automates the conventional high-strength steel plate, reduces the production cost, improves the working efficiency, simultaneously can remove the oxide skin remained on the surface of the steel plate after quenching by a cleaning mechanism and dry the steel plate, and simultaneously improves the plasticity of the material after the electro-plastic rolling.
Description
Technical Field
The invention relates to a device for manufacturing ultrahigh-strength steel plates, in particular to a device for manufacturing ultrahigh-strength steel plates on an assembly line.
Background
Since the middle of the 90 s of the last century, the demand of strip steel in China is getting larger and larger, and the ultrahigh-strength steel is developed on the basis of alloy structural steel and is mainly used for manufacturing an aircraft landing gear, a main beam, a solid rocket engine shell, a high-speed centrifuge rotating cylinder and other structural components bearing high stress. With the development of science and technology, the social demand of ultrahigh-strength steel is increasing, and the application field is also continuously widened.
Since 2000, the industrial revolution of the large machine production industry has been greatly developed, the economic globalization has increased the amount of steel for automobiles and the automobile output, and the three problems of oil consumption, emission and traffic safety have been brought to people while bringing convenience to travel. An effective means for solving the problems of energy consumption and environment is the light weight of automobiles, and light weight materials are divided into two categories: one is a low density, lightweight material such as aluminum alloy, magnesium alloy, and the like; another category is high strength materials such as high strength steel sheet, hot stamped steel, and high strength cast iron. The plate is a main variety of steel for automobiles, and can be divided into traditional low-strength mild steel, high-strength steel and ultrahigh-strength steel according to different strengths. From the viewpoint of performance, in order to satisfy requirements for automobile safety, collision resistance, fatigue resistance, etc., and to improve formability and surface quality, steel sheets for automobiles are required to have low plane anisotropy and high elongation, bending properties, hole expansibility, etc. In recent years, hot rolled plates made of high-strength steel are widely applied, but the hot rolled plates are slightly insufficient in thickness specification, lightness, surface quality and the like, and the weight reduction of automobiles puts more strict requirements on steel required structures, so that the total consumption of the hot rolled plates on automobiles is small, the hot rolled plates are mainly applied to chassis stamped parts, the automobile body accounts for about 10%, and high-strength steel plates are mostly used for automobile body structural parts.
At present, the traditional steel production technology is basically mature, the research, development and application of the new generation of steel materials become the first task of the 21 st century steel materials, and a large number of advanced process technologies for preparing high-strength steel materials are produced. It is well known that grain size is an important factor affecting mechanical and physical properties of materials, and that refining grains can significantly improve the strength and toughness of materials. The nano structure of the tissue structure can further improve the toughness of the material and has good application prospect in engineering. The refined steel has high strength and toughness and wide application prospect in structural equipment, so the preparation technology of the refined steel becomes the focus of the research field of high-strength materials. The current methods of making high strength steels include: strong Plastic Deformation (SPD), low carbon martensitic cold rolling, equal channel angular Extrusion (ECAP), High Pressure Torsion (HPT), cumulative lap welding (ARB), multidirectional forging (MDF), and the like. Of these, the technique of large plastic deformation (SPD) is more attractive and has the great potential to refine coarse-grained materials to the nanometer level, thus giving the material high strength. The mechanical strength and hardness of the traditional common low-carbon steel are low, low-carbon martensite can be obtained after quenching, and then nano-size crystal grains are obtained through grain refinement, so that the strength of the low-carbon martensite is improved, and high-strength steel is obtained.
The super-strength steel used for automobile body materials is required to have enough hardness, strength and capability of resisting severe environment, the quality of automobile plates is light, the requirements of automobile light weight and energy conservation and emission reduction need to be met, the existing process for preparing the high-strength steel consumes time and labor, the production efficiency is low, the mechanization and automation degree are poor, the requirements of people on the quality and quantity of the high-strength steel are difficult to meet, so how to improve the production device of the high-strength steel plate and even the super-strength steel plate is realized, and the technical problem to be solved by technical personnel in the field is urgently solved.
Disclosure of Invention
The invention aims to provide a device for producing ultrahigh-strength steel plates, which has the advantages of reasonable structure, high production efficiency and high mechanization and automation degree. The invention mainly adopts an on-line quenching mechanism and adds an aging treatment furnace on the basis of a conventional high-strength steel plate production device.
The specific scheme of the invention is as follows:
the invention mainly comprises the following steps: the device comprises a working rack, an online quenching mechanism, a quick cleaning mechanism, a rolling mechanism and an aging treatment furnace. The invention is characterized in that an online quenching mechanism is arranged on a working rack in front of a rolling mechanism of the production line (the part which is in contact with a traveling steel plate firstly is the front part), an electric field auxiliary rolling mechanism is arranged on the rolling mechanism, an aging treatment furnace is arranged on the working rack behind the rolling mechanism, and a cleaning mechanism is preferably arranged on the working rack in front of the rolling mechanism. The main body of the on-line quenching mechanism is an induction coil which is a plurality of circles of spiral pipes wound by a copper pipe, the space formed in the spiral pipe is approximately elliptic cylinder, the major axis size of the space is larger than the width of a steel plate, two radial slotted holes are respectively arranged at two end parts of the induction coil, and the inside of the induction coil is connected with one end of a binding post (through interference fit). The openings at the two ends of the induction coil are respectively provided with a guide pipe (through interference fit), the guide pipe at the front end (the part which is in contact with the advancing steel plate firstly is the front part) is a water inlet pipe, and the guide pipe at the rear end is a water outlet pipe. The induction coil is divided into a front part and a rear part from the middle, the front part is a light pipe and is only used for heating a steel plate to ensure that the steel plate is completely austenitized; the rear part of the induction ring is provided with through holes communicated with the inner cavity of the induction ring at the position facing the steel plate surface, each through hole is provided with a short tubular nozzle, and the induction ring heats and quenches the steel plate to obtain the high-strength steel plate with a martensite structure. Preferably, the nozzle is frusto-conical and has a diameter at the free end which is smaller than the diameter at the fixed end to increase the spray area. The steel plate is quenched and then moves to the quick cleaning mechanism through the rotation of the carrier roller on the working frame.
The quick cleaning mechanism is formed by winding a metal tube into a plurality of circles of spiral tubes, namely vent tubes, wherein the space formed in the circles is approximately elliptic cylinder-shaped, and the size of the long axis of the space is larger than the width of a steel plate. Through holes communicated with the inner cavity of the vent pipe are formed in the positions, facing the steel plate surface, of the vent pipes, each through hole is provided with a short tubular nozzle, and preferably each nozzle is in a truncated cone shape, and the diameter of a free end of each nozzle is smaller than that of a fixed end of each nozzle. The front end of the vent pipe is an air inlet, the rear end of the vent pipe is an air outlet, and for convenient connection, the openings at the two ends of the vent pipe are preferably step-shaped round pipes. The high-pressure air enters the breather pipe through the air inlet, and then is sprayed to the steel plate through the nozzle on the breather pipe, so that the purpose is mainly to remove the scale remained on the surface of the steel plate after quenching and dry the steel plate. The cleaned steel plate is moved to a rolling device for deformation treatment through the rotation of the carrier roller on the working frame.
The rolling mechanism is a multi-pass rolling mechanism consisting of four roll systems distributed on the left and right, two working rolls of each roll system are arranged adjacently up and down, and a supporting roll is respectively arranged on the upper part and the lower part of each working roll, preferably, the rolls are slightly convex so as to offset the bending generated by the rolls during rolling and obtain good plate shapes. Two carrier rollers adjacent to the front and the back of the rolling mechanism are respectively provided with an anode and a cathode which are assisted by an electric field and are respectively connected with the anode and the cathode of the pulse power supply, thereby forming a current loop of two output ends of the pulse power supply. Specifically, the electric field-assisted positive electrode and the electric field-assisted negative electrode are respectively two copper bars, the cylindrical main bodies of the two copper bars are arranged in the slotted holes formed in the carrier roller shafts, and the copper bars are connected with the slotted holes formed in the carrier roller shafts in an interference fit manner and used for supplying power to the carrier roller A2-1 and preventing electric leakage, so that current loops of two output ends of the pulse power supply are formed. The copper bar is arranged at one end outside the roller supporting shaft and is provided with a convex ring between the copper bar and the cylindrical main body, the cone of the copper bar corresponds to and is arranged in a special-shaped shell which is arranged at one side of the insulating connecting frame and consists of a truncated cone-shaped shell and a cylinder, the outer wall of the cylinder of the special-shaped shell is connected with one end of a connecting rod of the connecting frame, the other end of the connecting rod is connected with the outer wall of a lantern ring internally provided with threads, the internal threads of the lantern ring are meshed with the external threads of the plunger, and. The truncated cone-shaped shell part of the connecting frame is provided with a hole, so that the electric wire can be placed into the hole just and can be contacted with the copper bar, and the electric wire cannot rotate when the carrier roller rotates. The steel plate can apply adjustable pulse current in the process of rolling each pass, the electro-plastic effect of metal is utilized, the rolling force can be reduced, the mechanical property of the rolled steel plate is improved, and the ultrahigh-strength steel plate is obtained. Then the materials are transported to an aging treatment furnace under the action of a working frame for aging treatment.
The aging treatment furnace mainly comprises: a furnace frame, a supporting roller and an electric heating element. The furnace frame is composed of an upper furnace body and a lower support, wherein the furnace body is a hollow cuboid with two through ends, openings at the two ends are provided with furnace doors covering the furnace bodies, one side of each furnace door is connected with the furnace body through a hinge, and the other side of each furnace door is connected with the furnace body through a magnet. The upper parts of the top plate and the two side plates in the furnace body are respectively provided with a strip-shaped groove, an electric heating element, preferably a resistance spiral line, two pairs of through holes are arranged below the strip-shaped grooves of the two side plates, each pair of through holes is internally provided with a carrier roller shaft, and a carrier roller on the carrier roller shaft has the same structure as a carrier roller of a working frame which is not arranged in the front of or behind a rolling mechanism. The bearing roller is characterized in that two ends of a bearing roller shaft of the bearing roller, which are positioned outside a supporting seat, are respectively fixed on the supporting seat through insulating screws penetrating through holes in a fixed seat, a sleeve sleeved on the bearing roller shaft is arranged on the bearing roller shaft, bearing seats are respectively arranged at two ends in the sleeve, deep groove ball bearings sleeved on the bearing roller shaft are respectively arranged in the two bearing seats, a separating ring is respectively arranged at the inner sides of the two deep groove ball bearings, the purpose is to reduce the damage to the bearings, a sealing outer ring is respectively arranged at the outer side of each of the two sealing outer rings, a sealing inner ring is respectively arranged at the outer side of each of the two sealing outer rings, each of the two sealing inner rings is annular, an outer sealing ring is respectively arranged outside each of the two sealing. Preferably, the length of the roller sleeve is close to the distance between the two side plates of the furnace body so as to protect the roller shaft. The end parts of the two roller carrier shafts, which are positioned outside the furnace body, are provided with annular fixed seats sleeved on the two roller carrier shafts and are fixed on the furnace body through insulating screws. In addition, strip-shaped through holes are arranged on the positions of the two furnace doors corresponding to the space between the two carrier roller tops and the electric heating element so as to be used as a channel for the steel plate to continuously advance. When the steel plate is heated by the aging treatment furnace, partial internal stress of the steel plate is released, and the comprehensive mechanical property of the ultrahigh-strength steel is improved.
Compared with the prior art, the invention has the following advantages:
1. the invention greatly improves the production device of the conventional high-strength steel plate, adopts the online quenching mechanism, has higher heating speed and no heat preservation time, has higher hardness than the general quenched workpiece, has smaller deformation after quenching, is convenient for mechanization and automation, reduces the production cost, improves the working efficiency, and simultaneously, the cleaning mechanism can remove the oxide skin remained on the surface of the steel plate after quenching by using high-pressure air and dry the steel plate, thereby saving resources and protecting the environment.
2. The rolling device is a multi-pass rolling system with electric field assistance, the steel plate can apply adjustable pulse current in the process of rolling each pass, the generated electro-plastic effect can reduce the rolling force, improve the mechanical property and the surface quality of the rolled plate, reduce the abrasion between an upper working roll and a lower working roll and prolong the service life of the rolls.
3. The application of the aging treatment furnace reduces the residual stress of the rolled plate and improves the comprehensive mechanical property of the steel plate.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic perspective view of a work frame according to the present invention;
fig. 3 is a schematic three-dimensional view of a idler of the present invention;
fig. 4 is a schematic cross-sectional view of a idler of the present invention;
FIG. 5 is a diagrammatic, schematic perspective view of a powered work stand according to the present invention;
FIG. 6 is a schematic three-dimensional view of a copper bar according to the present invention;
FIG. 7 is a schematic perspective view of the connecting bracket of the present invention;
FIG. 8 is a schematic sectional view of the connection of the copper bar, the connecting frame and the electric wire according to the present invention;
FIG. 9 is a schematic perspective view of an in-line quenching mechanism of the present invention;
FIG. 10 is a schematic, isometric view of a nozzle of the present invention;
FIG. 11 is a schematic perspective view of a cleaning mechanism of the present invention;
FIG. 12 is a schematic perspective view of a rolling mechanism according to the present invention;
FIG. 13 is a schematic perspective view of an aging furnace according to the present invention;
FIG. 14 is a schematic sectional view of an aging furnace according to the present invention.
In the figure: 1. the steel plate, 2, a working frame, 2-1, a carrier roller A, 2-2, a supporting seat, 2-3, a fixed seat, 2-4, a bearing seat, 2-5, a spacer ring, 2-6, a carrier roller shaft, 2-7, a deep groove ball bearing, 2-8, a sealing outer ring, 2-9, a sealing inner ring, 2-10, an outer sealing ring, 2-11, a shaft cover, 2-12, a copper rod, 2-13, a connecting frame, 2-14, a plunger, 2-15, a sleeve, 2-16, a wire, 3, an online quenching mechanism, 3-1, a water inlet pipe, 3-2, a binding post, 3-3, an induction ring, 3-4, a water spray nozzle, 3-5, a water outlet pipe, 4, a cleaning mechanism, 4-1, a vent pipe, 4-2 and an air nozzle, 4-3 parts of air inlet holes, 4-4 parts of air outlet holes, 5 parts of rolling mechanism, 5-1 parts of supporting roll, 5-2 parts of working roll, 6 parts of aging treatment furnace, 6-1 parts of furnace frame, 6-2 parts of furnace door, 6-3 parts of electric heating element, 6-4 parts of carrier roller B, 6-5 parts of hinge.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In a schematic front view diagram of an apparatus for producing an ultra-high strength steel sheet shown in fig. 1, the present invention includes: the device comprises a working rack 2, an online quenching mechanism 3, a quick cleaning mechanism 4, a rolling mechanism 5 and an aging treatment furnace 6. The working machine frame is composed of a plurality of single machine frames which are connected end to end as shown in figure 2, each single machine frame is provided with a rectangular frame and a supporting seat 2-2 composed of a stand column connected with the rectangular frame, five pairs of through holes are arranged on the rectangular frame, a carrier roller A2-1 is respectively arranged in each pair of through holes, and in the schematic diagram of the carrier roller shown in figure 3 and figure 4, two ends of a carrier roller shaft 2-6 of the carrier roller A, which are positioned outside the supporting seat, are respectively fixed on the supporting seat 2-2 by insulating screws penetrating through the through holes on the fixed seat 2-3. The carrier roller shafts 2-6 are provided with sleeves 2-15 sleeved thereon, two ends in the sleeves 2-15 are respectively provided with bearing seats 2-4, the bearing seats 2-4 are connected on the sleeves 2-15 in a welding way, deep groove ball bearings 2-7 sleeved on the carrier roller shafts 2-6 are respectively arranged in the two bearing seats 2-4, the inner sides of the two deep groove ball bearings 2-7 are respectively provided with an isolating ring 2-5, the outer sides are respectively provided with a sealing outer ring 2-8, the outer sides of the two sealing outer rings 2-8 are respectively provided with a sealing inner ring 2-9 which are both circular, the outer sides of the two sealing inner rings 2-9 are respectively provided with an outer sealing ring 2-10, the outer sealing rings 2-10, the sealing inner and outer rings form a labyrinth sealing ring, and the outer sides of the outer sealing rings 2-10 are provided with shaft, the outer sealing ring 2-10 is connected with the shaft cover 2-11 in a buckling mode.
The working machine frame is provided with a steel plate 1, the front end of the steel plate is firstly arranged in an on-line quenching mechanism 3, as shown in figure 9, the main body of the steel plate is an induction coil 3-3 which is a six-turn spiral pipe formed by winding a copper pipe, the space formed in the spiral pipe is approximately in an elliptic cylinder shape, the major axis dimension of the space is larger than the width of the steel plate, two end parts of the induction coil are respectively provided with a radial slotted hole, and the inside of the induction coil is respectively connected with one end of a binding post 3-2 through interference fit. The openings at the two ends of the induction coil are respectively provided with a guide pipe in interference fit, the guide pipe at the front end (the part which is in contact with the advancing steel plate firstly is the front part) is a water inlet pipe 3-1, and the guide pipe at the rear end is a water outlet pipe 3-5. The induction coil is divided into a front part and a rear part from the middle, the front three rings are light pipes, eleven through holes communicated with the inner cavity of the induction coil are arranged at the positions of the rear three rings of the induction coil, which face the surface of the steel plate, each through hole is vertically fixed with a short pipe-shaped water nozzle 3-4 in an interference fit mode, the water nozzles are in a truncated cone shape, and the diameter of the free end of each water nozzle is smaller than that of the fixed end of each water nozzle, as shown in figure 10. The steel plate is quenched and then moves to the quick cleaning mechanism through the rotation of the carrier roller on the working frame.
The quick cleaning mechanism is a three-circle spiral pipe, namely a vent pipe 4-1, which is formed by winding a metal pipe, as shown in figure 11, the space formed in the circle is approximately elliptic cylinder, and the size of the long axis of the space is larger than the width of a steel plate. The position of the vent pipe facing the steel plate surface is provided with ten through holes communicated with the inner cavity of the vent pipe, each through hole is vertically fixed with a short tubular air nozzle 4-2 in an interference fit mode, and the air nozzle is in a truncated cone shape, and the diameter of the free end of the air nozzle is smaller than that of the fixed end of the air nozzle. The front end of the vent pipe is provided with an air inlet 4-3, the rear end is provided with an air outlet 4-4, and two ends of the vent pipe are opened to form a step-shaped circular pipe. The cleaned steel plate is moved to a rolling device for deformation treatment through the rotation of the carrier roller on the working frame.
The rolling mechanism is a two-pass secondary rolling mechanism consisting of four roll systems distributed left and right, as shown in fig. 12, two working rolls 5-2 of each roll system are arranged adjacently up and down, and a supporting roll 5-1 is respectively arranged up and down of the two working rolls. Two carrier rollers adjacent to the front and the back of the rolling mechanism are respectively provided with an anode and a cathode assisted by an electric field, and as shown in figures 1 and 5, the anode and the cathode are respectively connected with an anode and a cathode of a pulse power supply. The electric field auxiliary positive electrode and the electric field auxiliary negative electrode are respectively two copper bars 2-12, as shown in fig. 6, a cylindrical main body of each copper bar is arranged in a slotted hole formed in a carrier roller shaft, and a cylindrical part of each copper bar 2-12 is connected with the slotted hole formed in the carrier roller shaft 2-6 in an interference fit mode and used for supplying power to the carrier roller A2-1 and preventing electric leakage, so that current loops of two output ends of a pulse power supply are formed. The copper rod 2-12 is located outside the roller carrier shaft 2-6 end is a cone, it sets up the convex ring between the main body of the cylinder, the cone of the copper rod and insulating connecting frame 2-13 one side by the special-shaped casing that the truncated cone shell and cylinder make up and put in it, as shown in figure 7, the cylinder outer wall of the said special-shaped casing couples to one end of connecting rod of the connecting frame, another end of connecting rod of the connecting frame couples to lantern ring outer wall with internal screw thread, the internal screw thread of the lantern ring engages with external screw thread of the plunger 2-14, the said plunger 2-14 is set up in slotted hole of the working frame 2. The holes formed in the truncated cone-shaped shell parts of the connecting frames 2-13 ensure that the wires 2-16 can be just placed in the holes and can be in contact with the copper bars 2-12, and the rollers 2-1 can ensure that the wires do not rotate when rotating, as shown in fig. 8. And after the rolling is finished, the steel plate is moved to an aging treatment furnace under the action of the working frame for aging treatment.
The furnace frame 6-1 of the aging treatment furnace is composed of an upper furnace body and a lower support, as shown in fig. 13 and 14, wherein the furnace body is a hollow cuboid with two through ends, openings at the two ends are provided with furnace doors 6-2 covering the furnace body, one side of each furnace door is connected with the furnace body through a hinge 6-5, and the other side of each furnace door is connected with the furnace body through a magnet. The upper parts of the top plate and the two side plates in the furnace body are respectively provided with a strip-shaped groove, a resistance spiral line electric heating element 6-3 is arranged in each groove, two pairs of through holes are arranged below the strip-shaped grooves of the two side plates, a carrier roller B6-4 with the same structure as a carrier roller of the working frame is arranged in each pair of through holes, and the length of a carrier roller sleeve is close to the distance between the two side plates of the furnace body so as to protect the carrier. The end parts of the two roller carrier shafts, which are positioned outside the furnace body, are provided with annular fixed seats sleeved on the two roller carrier shafts and are fixed on the furnace body through insulating screws. And strip-shaped through holes are arranged on the positions of the two furnace doors corresponding to the space between the tops of the two carrier rollers B6-4 and the electric heating elements.
The experiment verifies that the low-carbon steel AISI1010 is austenitized at 1100 ℃, then is subjected to heat preservation for 5min and then is subjected to rapid water cooling to realize quenching treatment, strip-shaped martensitic steel is obtained, the initial hardness is 470MPa, the tensile strength is 1467MPa, the elongation is 16%, then cold rolling treatment and electro-plastic rolling are respectively carried out, the hardness and the tensile strength after the cold rolling of 10% are respectively improved to 486MPa and 1564MPa, the elongation is 11.25%, the hardness and the tensile strength after the cold rolling of 30% are respectively improved to 516MPa and 1673MPa, the elongation is 10.68%, the electro-plastic rolling parameters are set to be voltage 24V, the pulse width is 100 mu s, the pulse frequency is 600HZ, the hardness and the tensile strength after the electro-rolling of 10% are respectively improved to 483MPa and 1513.6MPa, the elongation is 15.3%, the hardness and the tensile strength after the electro-rolling of 30% are respectively improved to 511MPa and 1600.43MPa, the elongation is 11.35%, and then the aging treatment is carried out at 120 ℃ for 3 min, the hardness of the martensite steel which is not deformed is reduced to 465MPa, the tensile strength is improved to 1475MPa, the hardness and the tensile strength after cold rolling for 10 percent are respectively improved to 490MPa and 1570MPa, the hardness and the tensile strength after cold rolling for 30 percent are respectively improved to 520MPa and 1676MPa, the hardness and the tensile strength after electric rolling for 10 percent are respectively improved to 486MPa and 1550MPa, and the hardness and the tensile strength after electric rolling for 30 percent are respectively improved to 517MPa and 1665MPa, so that the ultrahigh-strength steel plate is obtained.
The working process of the invention is roughly as follows: before working, adjusting the current frequency of the induction coil, adjusting the distance between the upper working roll and the lower working roll to a proper value, adjusting the temperature of the aging treatment furnace to a required temperature, enabling a carrier roller of the working rack to be in a working state, turning on a power supply, manually placing a steel plate on the working rack, enabling the steel plate to move along with the rotation of the carrier roller, turning on switches of a water pipe and a high-pressure air pipe, heating the steel plate to a quenching temperature through the first half induction coil to fully austenitize the steel plate, then continuously heating the steel plate to the second half induction coil, continuously spraying cooling water to the steel plate through a water nozzle on a coil to realize an online quenching process, obtaining a high-strength steel plate with a martensite structure, continuously moving the steel plate to a cleaning mechanism to clean and dry the steel plate, continuously moving the steel plate to a rolling mechanism to perform electric field auxiliary rolling, and, the steel plate after the rolling treatment is moved to an aging treatment furnace through the rotation action of a carrier roller on a working rack, enters a furnace body through a strip-shaped through hole formed in the center of a furnace door for aging treatment, the steel plate is subjected to aging treatment continuously under the continuous rotation of the carrier roller in the aging treatment furnace, the temperature of the aging treatment furnace is controlled to be about 100 ℃ plus 250 ℃, the comprehensive mechanical property of the ultrahigh-strength steel plate can be improved, and the whole preparation process and the production process are continuous production.
Claims (7)
1. The utility model provides a production device of ultrahigh strength steel sheet, its work frame and the middle part that is established by supporting seat and the bearing roller above that constitutes of it are a plurality of four roller system multi-pass rolling mechanisms that distribute about being present high strength steel sheet's production line which characterized in that: an online quenching mechanism is arranged on the working rack in front of the rolling mechanism of the production line, namely the part which is firstly contacted with the advancing steel plate, an electric field auxiliary rolling mechanism is arranged on the rolling mechanism, and an aging treatment furnace is arranged on the working rack behind the rolling mechanism; the on-line quenching mechanism is characterized in that the main body of the on-line quenching mechanism is an induction coil which is divided into a front part and a rear part from the middle, the front part is a light pipe and is only used for heating the steel plate to enable the steel plate to be completely austenitized, through holes communicated with the inner cavity of the induction coil are formed in the positions, facing the surface of the steel plate, of the rear part of the induction coil, each through hole is provided with a short pipe-shaped nozzle, and the induction coil heats the steel plate and simultaneously quenches the steel plate; the electric field auxiliary rolling mechanism arranged on the rolling mechanism is characterized in that two carrier rollers adjacent to the front and the back of the rolling mechanism are respectively provided with a copper bar, the two copper bars form an electric field auxiliary anode and cathode, a cylindrical main body of the copper bar is arranged in a slot hole arranged on a carrier roller shaft, and the copper bar and the cylindrical main body are respectively connected with the anode and the cathode of a pulse power supply, so that current loops of two output ends of the pulse power supply are formed; the aging treatment furnace mainly comprises a furnace frame, carrier rollers and electric heating elements, wherein the furnace frame consists of an upper furnace body and a lower support, strip-shaped grooves are formed in the upper portions of a top plate and two side plates in the furnace body, the electric heating elements are arranged in the grooves, two pairs of through holes are formed in the lower portions of the strip-shaped grooves of the two side plates, and a carrier roller shaft is arranged in each pair of through holes; in addition, a quick cleaning mechanism is arranged on the working rack in front of the rolling mechanism.
2. The apparatus for producing an ultra-high strength steel sheet according to claim 1, characterized in that: the induction coil of the on-line quenching mechanism main body is a plurality of circles of spiral pipes which are wound by a copper pipe, the space formed in the spiral pipe is approximately elliptic cylinder, the size of the major axis of the induction coil is larger than the width of a steel plate, two ends of the induction coil are respectively provided with a radial slotted hole, the two ends of the induction coil are respectively connected with one end of a binding post, openings at two ends of the induction coil are respectively provided with a conduit, the conduit at the front end of the induction coil is a water inlet pipe, and the conduit at the rear end of the induction coil is.
3. The apparatus for producing an ultra-high strength steel sheet according to claim 1, characterized in that: the rolling mechanism is a multi-pass rolling mechanism consisting of four roll systems which are distributed left and right, and the steel plate can be applied with controllable pulse current in the process of rolling each pass.
4. The apparatus for producing an ultra-high strength steel sheet according to claim 1, characterized in that: the ageing treatment furnace body is the cavity cuboid that both ends link up, is equipped with the furnace gate that covers it on the opening at furnace body both ends, and furnace gate one side links to each other with the furnace body through the hinge, and the opposite side passes through magnet and links to each other with the furnace body, and roof and both sides board upper portion all are equipped with the bar recess in the furnace body, and the bearing roller on the bearing roller axle that establishes below both sides board bar recess is the same with the bearing roller structure in the work frame, is equipped with the bar through-hole on the position that two furnace gates are a.
5. The apparatus for producing an ultra-high strength steel sheet according to claim 1, characterized in that: the two ends of a carrier roller shaft of the carrier roller, which are positioned outside the supporting seat, are respectively fixed on the supporting seat by insulating screws penetrating through holes in the fixing seats, a sleeve sleeved on the carrier roller shaft is arranged on the carrier roller shaft, bearing seats are respectively arranged at two ends in the sleeve, deep groove ball bearings sleeved on the carrier roller shaft are respectively arranged in the two bearing seats, a separating ring is respectively arranged at the inner sides of the two deep groove ball bearings, a sealing outer ring is respectively arranged at the outer sides of the two sealing outer rings, a sealing inner ring is respectively arranged at the outer sides of the two sealing outer rings, the sealing inner rings are both circular, outer sealing rings are respectively arranged outside the two sealing inner rings, the outer sealing rings, the sealing inner rings and the sealing outer rings form labyrinth sealing rings, a shaft cover is arranged at the outer side of the outer sealing rings, the outer sealing.
6. The apparatus for producing an ultra-high strength steel sheet according to claim 1, characterized in that: the quick cleaning mechanism is a plurality of circles of spiral pipes, namely vent pipes, which are formed by winding a metal pipe, the space formed in the circle is approximately elliptic cylinder, the size of the long axis of the vent pipe is larger than the width of a steel plate, through holes communicated with the inner cavity of the vent pipe are arranged at the positions of the vent pipe facing the surface of the steel plate, each through hole is provided with a short pipe-shaped nozzle, the front end of the vent pipe is an air inlet, and the rear end of the vent pipe is an exhaust hole.
7. The apparatus for producing an ultra-high strength steel sheet according to claim 1, characterized in that: the nozzle is in a truncated cone shape, and the diameter of the free end is smaller than that of the fixed end.
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| CN101928873A (en) * | 2010-08-26 | 2010-12-29 | 姚圣法 | Method for processing high-strength and ultrahigh-strength steel plates |
| CN203569144U (en) * | 2013-10-11 | 2014-04-30 | 南京钢铁股份有限公司 | Surface cleaning device for steel plate quenched by quenching machine |
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Effective date of registration: 20211229 Address after: 064499 north steel logistics industry cluster area, Qian'an City, Tangshan City, Hebei Province (qianshawopu village, shaheyi town) Patentee after: Tangshan Legang metal products Co.,Ltd. Address before: 066004 No. 438 west section of Hebei Avenue, seaport District, Hebei, Qinhuangdao Patentee before: Yanshan University |
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Denomination of invention: A production device for ultra-high strength steel sheets Granted publication date: 20200807 Pledgee: Agricultural Bank of China Luanzhou Branch Pledgor: Tangshan Legang metal products Co.,Ltd. Registration number: Y2024110000023 |