WO2009094848A1 - Acier profilé utilisé pour un rail de train à suspension magnétique et procédés de laminage - Google Patents

Acier profilé utilisé pour un rail de train à suspension magnétique et procédés de laminage Download PDF

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Publication number
WO2009094848A1
WO2009094848A1 PCT/CN2008/002124 CN2008002124W WO2009094848A1 WO 2009094848 A1 WO2009094848 A1 WO 2009094848A1 CN 2008002124 W CN2008002124 W CN 2008002124W WO 2009094848 A1 WO2009094848 A1 WO 2009094848A1
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WIPO (PCT)
Prior art keywords
rolling
profiled steel
magnetic levitation
web
train track
Prior art date
Application number
PCT/CN2008/002124
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English (en)
Chinese (zh)
Inventor
Jie Dong
Weizhuang Qu
Xiwei Huo
Funing Liu
Chuandong Zhao
Wei FENG
Pengju Yuan
Jie Zhang
Dong Yang
Zhenhong Ma
Dequan Yin
Original Assignee
Laiwu Steel Group Co., Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Laiwu Steel Group Co., Ltd filed Critical Laiwu Steel Group Co., Ltd
Priority to JP2010540003A priority Critical patent/JP5233023B2/ja
Priority to KR1020107016667A priority patent/KR101244269B1/ko
Publication of WO2009094848A1 publication Critical patent/WO2009094848A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/085—Rail sections
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • 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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/0226—Hot 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
    • C21D8/0221—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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
    • 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
    • C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension

Definitions

  • the invention belongs to the technical field of metallurgy, and relates to a profiled steel, in particular to a F-shaped profiled steel for a magnetic levitation train track and a rolling process thereof.
  • the minimum interval between peaks is 6min
  • the interval between peaks is 10min
  • the maximum speed is 100km/ h
  • the one-way running time is 15min
  • the daily traffic is 15,000. It was officially opened to traffic on March 5, 2005.
  • Similar systems to HSST include the Daewoo test line in Korea and AMT in the United States.
  • CN1621618 discloses a driving road for a magnetic levitation train, the road comprising a support structure supported on a foundation, in particular made of reinforced concrete or prestressed concrete, the support structure having a plate shape at a location associated with the vehicle An edge portion projecting laterally, on which the magnetic suspension orbiting mechanism is arranged in a U-shaped functional component of the suspension frame of the vehicle, such as a sliding plate, a stator and a side guiding track, so that the vehicle suspension frame and the supporting structure Transmission between end parts
  • the size of the gap is minimized and the gap is in the form of a labyrinth.
  • the height and width of the slit correspond approximately to the tolerance dimension of the magnetic levitation orbiting mechanism on the portion of the sliding plate and the side guiding track.
  • CN2869102 discloses a medium-low speed maglev train track, which is directly fixed on both sides of the beam by bolts or pre-buried manner; the lower surface of the rail is fixed by bolts to the inverted U-shaped suspension rail or the lower part of the rail is inverted U-shaped, which constitutes a inverted U-shaped suspension rail.
  • the existing medium and low-speed maglev train track steels are available in box steel, I-beam and U-shaped steel. In practical applications, there are problems such as poor precision, complicated installation, and difficulty in orbital positioning.
  • Japan's medium and low-speed magnetic suspension test line track is made of weather-resistant steel plate welded and machined. Although the precision is high, the material waste is serious, the production cost is high, the production efficiency is low, and it is difficult to achieve mass production, which can only meet the requirements of current small batch test. .
  • maglev train Using electromagnetic force to overcome the gravity of the earth, so that the train can be suspended in orbit.
  • the normally-oriented maglev train has a suspension clearance of about 1 cm) and uses a linear motor to propel forward. From the perspective of suspension theory, the accuracy of the track is very high. Therefore, in order to ensure the accuracy of the track, the production method of the track is: After the steel plate is welded into the required shape, it is machined with high precision.
  • the production method is generally steel plate welding-annealing-machining-annealing-straightening, which is not only complicated in process, low in processing efficiency, long in production cycle, but also wasteful material waste and high in cost.
  • Some domestic companies have tried to produce finished products by hot rolling, but they have not succeeded. They only use rough rolling mills to roll out blanks and then machine them to produce finished products.
  • the production process still needs annealing process, compared with welding production. Although the process has been reduced, the production cycle and cost have not been significantly reduced, and the efficiency has not been greatly improved, and the mass industrial production requirements cannot be met.
  • CN1470669 discloses a soft magnetic structural steel and a method of manufacturing the same, a soft magnetic structural steel for a magnetic suspension orbit and a method of manufacturing the same.
  • the technical solution is: soft magnetic structural steel and its manufacturing method, the constituent elements include: Fe, C, Si, Mn, P, S, Als, Cr, Cu, Ti, N, Ni, Ca, which is characterized by the component element Ca available REM substitution, the weight percentage of the constituent elements is: C: 0.010% ⁇ 0.040%, Si: 1.0% ⁇ 2.0%, ⁇ : 0 ⁇ 60% ⁇ 1 ⁇ 00%, P: ⁇ 0.015%, S: ⁇ 0.005 %, Als: 0 ⁇ 005% ⁇ 0 ⁇ 020%, Cr: ⁇ 0.60%, Cu: 0 ⁇ 20% ⁇ 0 ⁇ 60%, Ti: 0 ⁇ 005% ⁇ 0 ⁇ 02%, ⁇ : ⁇ 0.010%, Ni: ⁇ 1.00%, Ca or REM: ⁇ 0.010%, the balance being iron and inevitable inclusions.
  • the rolling process includes: continuous casting
  • CN1690242 discloses a soft magnetic structural steel sheet excellent in low temperature toughness, the composition of which is (mass percentage) C 0 ⁇ 010% ⁇ 0.040%, Si 0 ⁇ 50% ⁇ 1 ⁇ 00%, ⁇ 1 ⁇ 00% ⁇ 1 ⁇ 50%, ⁇ 0 ⁇ 015%, S ⁇ 0.005 %, Al s 0 ⁇ 50% ⁇ 1 ⁇ 00%, Cr 0 ⁇ 20 ⁇ 0 ⁇ 50%, Cu 0 ⁇ 20% ⁇ 0 ⁇ 60%, ⁇ 0 ⁇ 005 % ⁇ 0.02%, 0.001 0.001% ⁇ 0 ⁇ 008%, Ni 0 ⁇ 30 ⁇ 0 ⁇ 80%, Ca 10ppm ⁇ 60ppm, the balance being iron and unavoidable inclusions, Pcm ⁇ 0.20%.
  • the present invention provides a method for improving product accuracy, simplifying installation steps, reducing the difficulty of track positioning, reducing production cost, saving materials, improving production efficiency, and meeting industrialization and batch requirements. Hot-rolled F-shaped profiled steel for low-speed maglev train tracks.
  • Another object of the present invention is to provide a production process capable of directly rolling a magnetically levied orbit having high precision, high flatness, and uniform structure without using welding or machining.
  • the rolling process of the present invention is directed to the design of a profiled rolling process for the characteristics of a profiled steel for a magnetic suspension track.
  • the invention provides a profiled steel for a magnetic levitation train track, wherein the profiled steel has a F-shaped cross section, wherein an angle between the centerline of the inclined leg and the lower surface of the web is ⁇ , and the upper and lower surfaces of the horizontally extending section are respectively on the upper and lower sides of the web.
  • the surfaces are parallel to each other or in the same plane, and the straight legs are located at the junction of the web and the horizontal extension.
  • the oblique leg and the straight leg have the same vertical height with respect to the lower surface of the web.
  • the shaped steel has a circular arc shape at each corner.
  • the angle between the oblique leg and the lower surface of the web is 92 to 120 °, preferably 95 to 105. .
  • the present invention also provides a rolling process for the profiled steel for a magnetic levitation train track, which in turn includes a rough rolling, a finishing rolling, a cooling control and a straightening process, wherein the rough rolling is performed by a two-roll reversible rolling mill, and the two rolls are reversible
  • the maximum rolling force of the rolling mill is 8000 ⁇ 10000KN, preferably 8000 ⁇ 9000KN, and the rolling deformation accounts for 60% ⁇ 90% of the total deformation; the finishing rolling adopts the three-stand universal continuous rolling unit for continuous rolling.
  • the rolling temperature of the rough rolling step is 1150 to 1200 ° C, and the finishing temperature is 950 to 1000 ° C.
  • the rolling force of the finishing rolling is 10000 ⁇ 15000KN, the pressing precision is ⁇ 0.1mm ; the rolling rolling temperature is 800-840°C, and the finishing rolling temperature is 750-850°C, and the remaining deformation is completed at this stage.
  • the universal continuous rolling mill replaces the longer S roller of the roller body by using a short horizontal universal roller; (the universal rolling mill adopts a two-roll simple mode, only two rollers per frame, each The rolls are called S rolls).
  • the universal rolling mill is further provided with two left and right vertical rollers, and the control system of the rolling mill controls the upper and lower horizontal rollers and the left and right vertical rollers simultaneously to complete the rolling process, and the upper and lower horizontal rollers are active rollers, The two vertical rollers are driven rollers.
  • the rectangular billet is cold-packed or heat-loaded into the furnace, heated to 1200-1250 °C, and subjected to high-pressure water descaling, descaling pressure 10 ⁇ 20MPa.
  • the F-shaped profiled steel for the magnetic levitation train track provided by the present invention is different from the F-shaped profiled steel welded by the steel plate, and the joints of the respective portions are all circular arc transitions. This design is to ensure that the product can pass through the hot rolling directly.
  • the method of production, without welding and machining simplifies the manufacturing process, reduces the cost, improves the production efficiency, and at the same time increases the rigidity and strength of the inclined protruding section (slanted leg) and the vertical protruding section (straight leg). , enhanced security of use.
  • the profiled steel structure provided by the invention can make the inclined protruding section and the vertical protruding section respectively correspond to the two poles of the U-shaped electromagnet of the vehicle body, and the lower end plane interacts with the electromagnet of the vehicle body to generate an upward attraction to the vehicle body. Suspended.
  • the selected inclined angle of the inclined protruding section not only well withstands the horizontal centrifugal force generated by the vehicle during the running of the curve, but also functions as a friction braking process with the braking of the vehicle body; horizontal extension
  • the out-segment serves as a connection, which enables the medium- and low-speed maglev train track F-shaped steel to be easily connected and fixed to the sleeper with high strength and rigidity.
  • the web is designed to facilitate the mounting of the sensor board on top and to provide a horizontal drive for the car body during operation.
  • the rolling process provided by the invention has the advantage that the rough rolling adopts two-roll reversible rolling with large rolling force Machine rolling, large deformation rolling of the billet, uniform rolling material, eliminating defects on the billet, reducing rolling pass, reducing roll consumption and increasing productivity; finishing rolling with large rolling force, high
  • the precision three-stand universal rolling mill performs continuous rolling, which improves the rolling rhythm and reduces the temperature drop, which can reduce the heating temperature of the billet and reduce the gas consumption.
  • the rolling mill is optimized and modified. Instead of using the two-roller mode, the process control system and mechanical control system of the universal mode are modified, and the improved universal mode is used for rolling.
  • the improved universal mode rolling differs from the two-roll mode rolling mentioned above in that: in the two-roll mode, the rolling mill has only two upper and lower horizontal rolls, and the rolling mill control system controls two horizontal rolls; Next, in addition to the upper and lower horizontal rolls, the rolling mill has two left and right vertical rolls.
  • the control system of the rolling mill controls the upper and lower horizontal rolls and the left and right vertical rolls simultaneously, and separate control of the horizontal or vertical rolls. can not achieve.
  • the independent control of the horizontal roller by the rolling mill control system is realized in the universal mode. In this way, replacing the longer S roller of the roller body with the shorter universal horizontal roller of the roller body saves the tooling input and consumption.
  • the final product can then be obtained through a controlled cooling process and a straightening process.
  • the invention can produce the final product only through the large H-beam hot rolling production line, without the need of heat treatment and mechanical processing steps, which not only greatly reduces the cost, improves the production efficiency, but also satisfies the requirements of the batch production.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention
  • FIG. 2 is a schematic structural view of another embodiment of the present invention.
  • the specific production process of rolling is as follows: rectangular billet is cold-packed or hot-loaded into the furnace, heated to 1200-1250 °C, and subjected to high-pressure water descaling. To ensure the descaling effect, the descaling pressure is 10 ⁇ 20MPa, except for the scale. The billet is sent to the roughing mill by roller conveyor, and the rolling is 1150-1200 °C, and the finishing temperature is 950-1000 °C. In order to ensure the uniformity of the product, this stage adopts a two-roll reversing mill for large deformation rolling. The maximum rolling force of the two-roll reversing mill is 8000 ⁇ 10000KN, and the rolling deformation accounts for 60% ⁇ 90% of the total deformation.
  • the rough rolling billet is sent to the universal unit for continuous rolling through the conveyor roller conveyor, and the finishing rolling adopts large
  • the rolling force and high-precision three-stand universal continuous rolling mill are continuously rolled to achieve two-roll rolling in the universal mode.
  • the rolling force of finish rolling is 10000 ⁇ 15000KN, the pressing precision is ⁇ 0.1mm ;
  • the rolling temperature is 800-840°C, the finishing rolling temperature is 750-850°C, and the remaining deformation is completed at this stage.
  • the universal continuous rolling mill replaces the longer S roller of the roller body by using a short universal universal horizontal roller.
  • the improved universal mode rolling differs from the two-roll mode rolling mentioned above in that: in the two-roll mode, the rolling mill has only two upper and lower horizontal rolls, and the rolling mill control system controls two horizontal rolls; Next, in addition to the upper and lower horizontal rolls, the rolling mill has two left and right vertical rolls.
  • the control system of the rolling mill controls the upper and lower horizontal rolls and the left and right vertical rolls simultaneously, and separate control of the horizontal or vertical rolls. can not achieve.
  • the rolled parts of the universal unit are sent to the controlled cooling zone for controlled cooling, so that the rolled piece obtains a uniform temperature and a suitable cooling rate to avoid bending and residual stress caused by uneven temperature.
  • the controlled cooling is completed, the rolled piece is sent to the hot saw for tail cutting, segmentation, sampling operation, and then the cooling bed is controlled to cool.
  • the rolled piece is cooled to below 150 °C, it is straightened into the special straightening machine for profiled steel to correct the deformation caused by air cooling. Finally, the rolled piece is cut into pieces and collected.
  • the profiled steel for the magnetic levitation train track as shown in Fig. 1, the profiled section has an F-shaped cross section and is composed of four parts: a slanting leg 1, a web 2, a straight leg 3, and a horizontal extension section 4.
  • the angle between the centerline of the oblique leg and the lower surface of the web is 92°, and the upper and lower surfaces of the horizontal protruding section are parallel to the lower surface of the web respectively, and the straight leg is located at the joint of the web and the horizontal protruding section.
  • the corners of the profiled steel are rounded.
  • the vertical height of the oblique leg 1 and the straight leg 3 with respect to the lower surface of the web is the same.
  • the profiled steel for the maglev train track as shown in Figure 1, wherein the angle between the centerline of the inclined leg and the lower surface of the web is 95°, and the upper and lower surfaces of the horizontal extension are parallel to the lower surface of the web, respectively.
  • the web is joined to the horizontal extension.
  • the corners of the profiled steel are rounded.
  • the vertical height of the oblique leg 1 and the straight leg 3 with respect to the lower surface of the web is the same.
  • the profiled steel for the maglev train track as shown in Figure 2, wherein the angle between the centerline of the inclined leg and the lower surface of the web is 105°, and the upper and lower surfaces of the horizontal extension are respectively on the same plane as the lower surface of the web, straight
  • the legs are located at the junction of the web and the horizontal extension.
  • the corners of the profiled steel are rounded.
  • the vertical height of the inclined leg 1 and the straight leg 3 with respect to the lower surface of the web is the same.
  • the profiled steel for the magnetic levitation train track as shown in Fig. 2, wherein the angle between the center line of the inclined leg and the lower surface of the web is 120°, and the upper and lower surfaces of the horizontal protruding section are respectively on the same plane as the lower surface of the web, straight
  • the legs are located at the junction of the web and the horizontal extension.
  • the corners of the profiled steel are rounded.
  • the vertical height of the oblique leg 1 and the straight leg 3 with respect to the lower surface of the web is the same.
  • the rectangular billet is cold-packed or heat-loaded into the furnace, heated to 1200-1230 °C, and subjected to high-pressure water descaling.
  • the descaling pressure is 10 MPa
  • the blanks except the scale are sent to the roughing mill by the roller conveyor.
  • Rolling 1150-1180 ° C, finishing rolling temperature is 950-1000 ° C, in order to ensure the uniformity of the product, this stage uses a two-roll reversing mill for large deformation rolling, the maximum rolling force of the two-roll reversing mill is 8000KN, the rolling deformation should account for 60% of the total deformation.
  • the rough rolling billet is sent to the TM universal unit for continuous rolling through the conveyor roller conveyor.
  • the finishing rolling adopts the large rolling force and high precision three-stand universal continuous rolling mill for continuous rolling to realize the universal mode.
  • the next two rolls are rolled.
  • the rolling force of finishing rolling is 15000KN, the pressing precision is ⁇ 0.1mm; the rolling temperature is 800-840°C, and the finishing rolling temperature is 750-800°C.
  • the remaining deformation is completed in this stage.
  • the universal continuous rolling mill replaces the longer S roller of the roller body by using a short universal universal horizontal roller.
  • the improved universal mode rolling differs from the two-roll mode rolling mentioned above in that: in the two-roll mode, the rolling mill has only two upper and lower horizontal rolls, and the rolling mill control system controls two horizontal rolls; Next, in addition to the upper and lower horizontal rolls, the rolling mill has two left and right vertical rolls.
  • the control system of the rolling mill controls the upper and lower horizontal rolls and the left and right vertical rolls simultaneously, and separate control of the horizontal or vertical rolls. can not achieve.
  • the rolled parts of the universal unit are sent to the controlled cooling zone for controlled cooling, so that the rolled piece obtains a uniform temperature and a suitable cooling rate to avoid bending and residual stress caused by uneven temperature.
  • the controlled cooling is completed, the rolled piece is sent to the hot saw for tail cutting, segmentation, sampling operation, and then the cooling bed is controlled to cool.
  • the rolled piece is cooled to below 150 °C, it is straightened into the special straightening machine for profiled steel to correct the deformation caused by air cooling.
  • the rolled piece is cut into pieces and collected.
  • the profiled steel for the medium and low speed maglev train track described in Embodiment 1 is obtained.
  • the rectangular billet is cold-packed or hot-loaded into the furnace, heated to 1200-1250 °C, and subjected to high-pressure water descaling.
  • the descaling pressure is 15MPa
  • the blanks except the scales are sent to the roughing mill by roller conveyor
  • the rolling is 1180-1200 °C
  • the finishing temperature is 950-1000 °C.
  • the two-roller reversing mill is used for large deformation rolling.
  • the maximum rolling force of the two-roll reversing mill is 9000KN, and the rolling deformation should account for 80% of the total deformation.
  • the rough rolling billet is sent to the TM universal unit for continuous rolling through the conveyor roller conveyor.
  • the finishing rolling adopts the large rolling force and high precision three-stand universal continuous rolling mill for continuous rolling to realize the universal mode.
  • the next two rolls are rolled.
  • the rolling force of finishing rolling is 13000KN, the pressing precision is ⁇ 0.1mm; the rolling temperature is 820-840 °C, and the finishing rolling temperature is 800-850 °C.
  • the remaining deformation is completed at this stage.
  • the universal continuous rolling mill replaces the longer S roller of the roller body by using a short universal universal horizontal roller.
  • the improved universal mode rolling differs from the two-roll mode rolling mentioned above in that: in the two-roll mode, the rolling mill has only two upper and lower horizontal rolls, and the rolling mill control system controls two horizontal rolls; Next, in addition to the upper and lower horizontal rolls, the rolling mill has two left and right vertical rolls.
  • the control system of the rolling mill controls the upper and lower horizontal rolls and the left and right vertical rolls simultaneously, and separate control of the horizontal or vertical rolls. can not achieve.
  • the rolled parts of the universal unit are sent to the controlled cooling zone for controlled cooling, so that the rolled piece obtains a uniform temperature and a suitable cooling rate to avoid bending and residual stress caused by uneven temperature.
  • the controlled cooling is completed, the rolled piece is sent to the hot saw for tail cutting, segmentation, sampling operation, and then the cooling bed is controlled to cool.
  • the rolled piece is cooled to below 150 °C, it is straightened into the special straightening machine for profiled steel to correct the deformation caused by air cooling.
  • the rolled piece is cut into pieces and collected.
  • the profiled steel for the medium and low speed maglev train track described in the second embodiment is obtained.
  • the rectangular billet is cold-packed or heat-loaded into the furnace, heated to 1240-1250 °C, and subjected to high-pressure water descaling.
  • the descaling pressure is 20 MPa
  • the blanks except the scales are sent to the roughing mill by the roller conveyor.
  • Rolling 1180-1200 °C, finishing rolling temperature is 980-1000 °C, in order to ensure the uniformity of the product, this stage uses a two-roll reversing mill for large deformation rolling, the maximum rolling force of the two-roll reversing mill is 9000KN
  • the rolling deformation should account for 90% of the total deformation.
  • the rough rolling billet is sent to the universal unit for continuous rolling through the conveyor roller conveyor.
  • the finishing rolling adopts the large rolling force and high precision three-stand universal continuous rolling unit for continuous rolling to realize the universal mode. Rolling two rolls.
  • the rolling force for finishing rolling is 10000KN, the pressing accuracy is ⁇ 0.1mm; the rolling temperature is 820-840 °C, and the finishing rolling temperature is 750-800 °C.
  • the remaining deformation is completed at this stage.
  • the universal continuous rolling mill replaces the longer S roller of the roller body by using a short universal universal horizontal roller.
  • This kind The improved universal mode rolling differs from the above-mentioned two-roll mode rolling in that: in the two-roll mode, the rolling mill has only two upper and lower horizontal rolls, and the rolling mill control system controls two horizontal rolls; and in the universal mode, In addition to the upper and lower horizontal rolls, the rolling mill has two left and right vertical rolls.
  • the control system of the rolling mill controls the upper and lower horizontal rolls and the left and right vertical rolls simultaneously, but the separate control of the horizontal or vertical rolls cannot be realized. .
  • the rolled parts of the universal unit are sent to the controlled cooling zone for controlled cooling, so that the rolled piece obtains a uniform temperature and a suitable cooling rate to avoid bending and residual stress caused by uneven temperature.
  • the controlled cooling is completed, the rolled piece is sent to the hot saw for tail cutting, segmentation, sampling operation, and then the cooling bed is controlled to cool.
  • the rolled piece is cooled to below 150 °C, it is straightened into the special straightening machine for profiled steel to correct the deformation caused by air cooling.
  • the rolled piece is cut into pieces and collected.
  • the profiled steel for the medium and low speed maglev train track described in Example 3 was obtained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Organic Chemistry (AREA)
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Abstract

L'invention concerne un acier profilé utilisé pour un rail de train à suspension magnétique à vitesse moyenne à basse, qui présente une section en F, y compris un pied incliné (1), un pied vertical (3), une âme (2) et une partie de prolongement (4) horizontale. La ligne centrale du pied incliné (1) est inclinée par rapport à la surface inférieure de l'âme (2), le pied vertical se situe à la jonction de l'âme (2) et de la partie de prolongement (4) horizontale, et la partie supérieure et la surface inférieure de la partie de prolongement (4) sont indépendamment parallèles à la surface correspondante de l'âme (2) ou dans le même plan que celle-ci. Les procédés de laminage de cet acier profilé comprennent un laminage brut, un laminage de finition, un réglage par refroidissement et un redressage. Deux cylindres réversibles de laminoir sont utilisés pour le laminage brut, la force de laminage maximum de deux cylindres réversibles étant comprise entre 8000 et 10000 KN, la déformation de laminage représentant entre 60 et 90 pour cent de la déformation totale; une ligne de laminage continue universelle à trois postes est utilisée pour le laminage de finition. L'invention peut simplement utiliser une grande ligne de production de laminage à chaud en H pour produire des produits finis.
PCT/CN2008/002124 2007-12-29 2008-12-29 Acier profilé utilisé pour un rail de train à suspension magnétique et procédés de laminage WO2009094848A1 (fr)

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JP2010540003A JP5233023B2 (ja) 2007-12-29 2008-12-29 磁気浮上式鉄道軌道用の形鋼及びその圧延方法
KR1020107016667A KR101244269B1 (ko) 2007-12-29 2008-12-29 자기부상열차궤도용 이형강 및 그 압연 공정

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CN2007101163010A CN101214494B (zh) 2007-12-29 2007-12-29 一种磁悬浮列车轨道用异型钢的轧制工艺
CN200710116301.0 2007-12-29

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CN101214494B (zh) 2010-12-01

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