WO2018216742A1 - Procédé de fabrication d'acier à section en forme de h - Google Patents

Procédé de fabrication d'acier à section en forme de h Download PDF

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Publication number
WO2018216742A1
WO2018216742A1 PCT/JP2018/019883 JP2018019883W WO2018216742A1 WO 2018216742 A1 WO2018216742 A1 WO 2018216742A1 JP 2018019883 W JP2018019883 W JP 2018019883W WO 2018216742 A1 WO2018216742 A1 WO 2018216742A1
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Prior art keywords
rolling
rolled
edging
auxiliary
raised portion
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PCT/JP2018/019883
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English (en)
Japanese (ja)
Inventor
浩 山下
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新日鐵住金株式会社
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Application filed by 新日鐵住金株式会社 filed Critical 新日鐵住金株式会社
Priority to US16/614,000 priority Critical patent/US20200078842A1/en
Priority to EP18806758.1A priority patent/EP3593915A1/fr
Priority to JP2018545241A priority patent/JP6458917B1/ja
Priority to CN201880032555.0A priority patent/CN110636908A/zh
Publication of WO2018216742A1 publication Critical patent/WO2018216742A1/fr
Priority to PH12019502500A priority patent/PH12019502500A1/en

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    • 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
    • B21B1/088—H- or I-sections

Definitions

  • the present invention relates to a manufacturing method for manufacturing H-section steel using, for example, a slab having a rectangular cross section as a raw material.
  • raw materials such as slabs and blooms extracted from a heating furnace are formed into a rough shape (so-called dogbone-shaped material to be rolled) by a roughing mill (BD), and intermediate universal rolling is performed.
  • the thickness of the rough profile web and flange is reduced by a machine, and the edge reduction mill near the intermediate universal rolling mill is subjected to width reduction and forging and shaping of the flange of the material to be rolled.
  • an H-section steel product is modeled by a finishing universal rolling mill.
  • Patent Document 1 a groove is formed at the center of a flat shaping hole mold, and an unpressed lower portion is provided at the center of the web-corresponding portion during rolling to reduce the length of the cropping portion.
  • This Patent Document 1 describes that edging rolling is performed in a state in which a convex portion (corresponding to a raised portion of the present invention) is formed at the center of the web equivalent portion. Increased efficiency.
  • Patent Document 2 discloses a tentering rolling method for advantageously shaping a rough shaped steel slab in the manufacturing process of the shaped steel. Specifically, in Patent Document 2, local rolling is performed on the web equivalent part, then rolling is performed to flatten and widen the central convex part of the web equivalent part, and then the material to be rolled is set up. A rolling method for performing edging rolling is disclosed. According to this method, the flange width, web thickness, and web height can be adjusted to produce various types of rough steel slabs.
  • Patent Document 1 is a technique for reducing the length of the cropped portion, and does not disclose any technical idea of shaping a material to be rolled having a large flange width. No mention is made of the effect of carrying out the process, the deterioration of the material permeability and the deterioration of the shape of the material to be rolled. Moreover, the convex part formed in the center of the web equivalent part disclosed by the said patent document 2 is formed, and then the rolling which flattens and widens the central convex part of the web equivalent part is performed, and then the material to be rolled is set up.
  • the object of the present invention is to provide a material in “auxiliary edging rolling”, in which a rolling material is returned to an edging hole mold after a raised portion is formed on a web in flat shaping rolling, and light rolling is performed. It is an object of the present invention to provide a method for producing an H-section steel capable of suppressing the deterioration of property and the deterioration of the shape of the material to be rolled and stabilizing the auxiliary edging rolling.
  • a method for producing an H-section steel comprising a rough rolling step, an intermediate rolling step, and a finish rolling step, wherein the rough rolling step is performed by applying a predetermined material to be rolled.
  • a ridge generation process, and a material rolled by one or more passes in the ridge generation process is rotated 90 ° or 270 ° again and returned to the final hole shape of the edging rolling process to perform light rolling
  • An edging rolling step, and a ridge portion erasing step for erasing and eliminating the ridge formed in the ridge generation step, and the upper and lower hole rolls performing the ridge generation step include a material to be rolled.
  • a hollow portion for forming a raised portion at the center of the web portion is provided at the center of the roll body length of the upper and lower hole-type roll, and the roll shape of the upper and lower hole-type roll is non-contact at the end of the flange portion of the material to be rolled
  • the ridge generation process and the auxiliary edging rolling process are continuously performed one or more times, and the ridge elimination process includes the ridge generation process and the auxiliary edging rolling process.
  • a method for producing an H-section steel is provided, which is performed after being performed.
  • light rolling may be performed so that the end of the flange portion of the material to be rolled fills the hole mold in the final hole mold of the edging rolling process.
  • the web height of the material to be rolled becomes smaller than the web height of the material to be rolled supplied to the hole mold that performs the raised portion generating step immediately before the auxiliary edging rolling step.
  • light rolling may be performed.
  • the auxiliary edging rolling step may be performed by one or two chances when one set of a plurality of passes with a constant edging height of the final pass is regarded as one chance.
  • the width of the raised part formed in the raised part generating step may be set to 25% or more and 50% or less of the web part method of the material to be rolled.
  • auxiliary edging rolling in which the material to be rolled is put back into the edging hole mold and the light rolling is performed after forming the raised portion on the web in the flat shaping rolling, the deterioration of the material permeability and the covering It is possible to suppress the deterioration of the rolled material shape and stabilize auxiliary edging rolling.
  • FIG. 1 is an explanatory diagram of an H-section steel production line T including a rolling facility 1 according to the present embodiment.
  • a heating furnace 2 As shown in FIG. 1, a heating furnace 2, a sizing mill 3, a roughing mill 4, an intermediate universal rolling mill 5, and a finishing universal rolling mill 8 are arranged in order from the upstream side on the production line T. Further, an edger rolling mill 9 is provided in the vicinity of the intermediate universal rolling mill 5.
  • the steel materials in the production line T will be collectively referred to as “rolled material A” for the sake of explanation, and the shape may be appropriately illustrated using broken lines, diagonal lines, etc. in each drawing.
  • a rectangular cross-section material (later rolled material A), for example, a slab 11 extracted from the heating furnace 2 is roughly rolled in a sizing mill 3 and a roughing mill 4.
  • intermediate rolling is performed in the intermediate universal rolling mill 5.
  • the edger rolling machine 9 reduces the flange tip portion (flange corresponding portion 12) of the material to be rolled as necessary.
  • the rolls of the sizing mill 3 and the roughing mill 4 are engraved with a so-called flat shaping hole mold that reduces the thickness of the edging hole mold and the web part and forms the shape of the flange part.
  • the H-shaped rough profile 13 is formed by reverse rolling of a plurality of passes through the sizing mill 3 and the rough rolling mill 4.
  • the H-shaped rough shaped material 13 is subjected to a plurality of passes of rolling by using a rolling mill row composed of two rolling mills, the intermediate universal rolling mill 5 and the edger rolling mill 9, and the intermediate material 14 is formed.
  • the intermediate material 14 is finish-rolled into a product shape in the finish universal rolling mill 8 to produce an H-section steel product 16.
  • the slab thickness of the slab 11 extracted from the heating furnace 2 is in a range of 290 mm to 310 mm, for example. This is a dimension of a slab material called a so-called 300-thick slab used when manufacturing a large H-shaped steel product.
  • an edging rolling process is first performed as a preceding process.
  • rolling modeling is performed in a state where a rectangular cross-section material (slab 11) is erected, and modeling is performed so as to have a predetermined substantially dog-bone shape.
  • the flat shaping rolling process is performed as a subsequent process.
  • the material A to be rolled that has undergone the edging rolling process is rotated by 90 ° or 270 °. With this rotation, the flange portions located at the upper and lower ends of the material A (slab 11) in the edging rolling process are arranged so as to come on the rolling pitch line.
  • the web part which is a connection part which connects two flange parts is reduced.
  • the H-shaped rough profile 13 shown in FIG. 1 is modeled by these edging rolling process and flat modeling rolling process.
  • the preceding and subsequent steps are collectively referred to as a rough rolling step.
  • the edging rolling process which is the preceding process, of the rough rolling process may be performed by a conventionally known general method. Therefore, in this specification, detailed description of the edging rolling process is omitted. Below, with reference to drawings, the flat shaping rolling process which is a latter process is demonstrated in detail.
  • the first flat shaping hole mold KH1 includes a pair of horizontal rolls, an upper hole roll 85 and a lower hole roll 86.
  • the material A to be rolled formed in the edging rolling process is rotated 90 ° or 270 °, and the upper and lower ends of the material A to be rolled until the preceding step.
  • the flange portion 80 located at is located so as to be on the rolling pitch line.
  • the web part 82 which is a connection part which connects the two flange parts 80 is reduced.
  • the upper and lower hole-type rolls 85 and 86 of the first flat shaping hole mold KH1 have a shape in which depressions 85a and 86a having a predetermined length L1 are formed at the center of the roll body length. Due to the hole-type configuration shown in FIG. 2, the web portion 82 is partially reduced. As a result, the web portion 82 after the reduction is formed with a reduction portion 82a at both ends in the web height direction and a raised portion 82b as an uncompressed portion at the center. In this way, rolling modeling is performed in which a raised portion 82b is formed on the web portion 82 in a so-called dogbone-shaped material to be rolled. In the present specification, the step of forming the raised portion 82b on the web portion 82 in the first flat shaping hole mold KH1 is also referred to as “the raised portion generating step”.
  • the width of the raised portion 82b after the formation is the same as the width L1 of the recessed portions 85a and 86a.
  • the width L1 of the recesses 85a and 86a in this specification is a width at a depth that is 1 ⁇ 2 of the depth hm of the recesses 85a and 86a. It is prescribed as A later-described escape amount L1 is also based on the same rule.
  • FIG. 3 is a schematic explanatory diagram of the second flat shaping hole mold KH2.
  • the second flat shaping hole mold KH2 includes a pair of horizontal rolls, an upper hole roll 95 and a lower hole roll 96.
  • the raised portion 82b formed in the web portion 82 is erased from the material A rolled and shaped in the first flat shaping hole mold KH1, and the inside of the web portion 82 Rolling modeling is performed to widen the method.
  • the second flat shaping hole mold KH2 rolling is performed in which the upper and lower hole-type rolls 95 and 96 are brought into contact with the raised portion 82b formed in the web portion 82 to reduce (erase) the raised portion 82b. Along with the reduction of the raised portion 82b, the spread in the web height direction and the metal flow to the flange portion 80 are promoted. By such a metal flow, it becomes possible to carry out rolling shaping without causing flange surface reduction as much as possible.
  • the step of reducing (erasing) the raised portion 82b in the second flat shaping hole mold KH2 is also referred to as a “raised portion erasing step”.
  • the second flat shaping hole mold KH2 is also referred to as a “protruding part erasing hole type” because it erases the protruding part 82b formed in the web part 82.
  • a rolling mill row composed of two rolling mills, an intermediate universal rolling mill 5 and an edger rolling mill 9, for the H-shaped rough profile 13 shaped through the first flat shaping hole mold KH1 and the second flat shaping hole mold KH2.
  • the intermediate material 14 is shaped by applying a plurality of passes of reverse rolling. And the intermediate material 14 is finish-rolled by the finishing universal rolling mill 8 to a product shape, and the H-section steel product 16 is manufactured (refer FIG. 1).
  • FIG. 4 is a schematic diagram of the final hole type KE (hereinafter also referred to as the edging final hole type KE) of the edging rolling process of the rough rolling process in the manufacture of H-section steel.
  • the edging final hole type KE is engraved in an upper hole type roll 50 and a lower hole type roll 51 which are a pair of horizontal rolls.
  • a protrusion 55 is formed that protrudes toward the inside of the hole mold.
  • a projection 56 that protrudes toward the inside of the hole mold is formed on the peripheral surface (that is, the hole bottom surface) of the lower hole roll 51.
  • These projecting portions 55 and 56 have a tapered shape, and the projecting length and other dimensions are configured to be equal between the projecting portion 55 and the projecting portion 56.
  • the rolled material A is reduced in the web width direction with the material A to be rolled up and the flange is widened.
  • the outer surface of the flange portion 80 (upper and lower end surfaces of the material to be rolled A) is pressed down by the upper and lower hole-type rolls 50 and 51 in which the protrusions 55 and 56 are formed.
  • FIG. 5 is a schematic explanatory diagram regarding auxiliary edging rolling between the edging final hole mold KE and a general flat shaping hole mold GH, in which (a) is before the auxiliary edging rolling, and (b) is auxiliary. The time of edging rolling is shown.
  • FIG. 5A in a general flat shaping hole mold GH, the web part of the material A to be rolled is reduced simultaneously with the reduction of the flange part 80 in the width direction. Therefore, as shown in FIG. 5B, the width of the flange portion 80 is considerably shortened. As a result, the material A to be rolled having the flange portion 80 with a short width is returned to the edging final hole mold KE for auxiliary edging rolling.
  • the flat shaping hole mold used at the time of auxiliary edging rolling is a “web partial rolling hole mold” which is the first flat shaping hole mold KH1 shown in FIG.
  • an appropriate condition is defined such that the shrinkage of the flange portion 80 in the rolling shaping by the web partial rolling hole die is minimized.
  • a raised portion 82b is generated when the web is thinned.
  • the pull-down of the flange part 80 is hard to occur, and the reduction rate of the flange width becomes low. Therefore, as shown in FIG. 6B, the width of the flange portion 80 is hardly reduced. Since the change in the flange width is small, it is returned to the edging final hole mold KE, and the restraining force of the hole sidewall when the auxiliary edging rolling is performed is also maintained.
  • left-right centering property is favorable, and dimensional defects and shape defects such as web buckling and left-right thickness unbalance of the flange portion 80 are suppressed.
  • the shape of the flange portion 80 is not in contact with the hole mold during rolling shaping, and the flat shaping rolling before auxiliary edging rolling (ie, It is desirable to design the roll so that the flange tip is in contact with the roll hole mold in the raised portion generation step).
  • auxiliary edging rolling for example, edging rolling of about 40 mm or less is preferably performed, and in this case, the flange width expansion amount is about 24 mm or less.
  • the web height of the material A to be rolled is made as small as possible with respect to the hole width W of the “web partial rolling hole mold” which is the first flat shaping hole mold KH1 (see FIG. 2).
  • the distance between the outer surface of the flange part 80 and a hole-type roll outer wall can be enlarged.
  • the optimum value of the edging amount during auxiliary edging rolling should be determined in consideration of the balance between wrinkle generation and rolling stability.
  • it is desirable that the side wall (outer wall) of the flat shaping hole mold and the web height of the material A to be rolled are substantially matched.
  • the rolling of the web part 82 is regarded as plate rolling.
  • the sheet width ratio is about 3 to 4 and the sheet thickness ratio is about 4 to 5 because of the dimensional relationship between the roll diameter of a normal section rolling mill and the rolled material of large H-section steel.
  • the flange portions are provided at both ends of the plate thickness, the amount of expansion is further increased.
  • the spread ratio in the web height direction of the material A to be rolled due to the web reduction is 4% or more of the web height. That is, when considering the material A to be rolled having a web height dimension of 1000 mm, for example, as a large H-shaped steel, the spread ratio of the web height is at least 40 mm.
  • the amount of edging during auxiliary edging rolling is preferably 40 mm or less.
  • FIG. 7 is a graph showing the transition of the flange width of the material A to be rolled for each pass when a plurality of passes have passed during flat shaping rolling.
  • the example of FIG. 7 is data when FEM calculation is performed using a 2000 mm ⁇ 300 mm cross-section slab as a material.
  • flat shaping rolling with a conventional general shaping hole mold GH hereinafter referred to as “conventional method” and flat shaping rolling with the first flat shaping hole mold KH1 according to the present embodiment (Hereinafter referred to as “the method of the present invention”).
  • the reduction rate of the flange width by the flat shaping rolling according to the present embodiment was smaller than the reduction rate of the flange width by the conventional method.
  • Table 1 shown below is an experimental example showing the relationship between the hole filling property and the material passing property in auxiliary edging rolling.
  • Table 1 shows the relationship between the hole filling property and the material permeability in the conventional method and the method of the present invention under the conditions of Case 1 to Case 4.
  • edging rolling with an edging amount of about 40 mm was performed in two passes in all cases 1 to 4. For this reason, the value of the change in web height during auxiliary edging rolling shown in Table 1 is expressed as ⁇ 40 mm in all cases 1 to 4.
  • the present inventors thought that the effect of suppressing dimensional defects and shape defects differed depending on the schedule design (rolling amount, pass schedule, etc.) of auxiliary edging rolling according to the present embodiment. Then, the transition of the flange width by auxiliary edging rolling in the case of manufacturing H-section steel using a 2000 mm ⁇ 300 mm cross-section slab as a raw material was verified by experiments.
  • Table 2 shown below shows the transition of the flange width for each pass when flat modeling rolling is performed using the first flat modeling hole mold KH1 (that is, the web partial rolling hole mold). Cases 1 to 3 in Table 2 differ in the number of times of auxiliary edging rolling for each pass of flat shaping rolling.
  • the auxiliary edging rolling that is, the case 2 and the case 3
  • the transition of the flange width after the auxiliary edging rolling is shown.
  • the description of the 15th pass to the 23rd pass in the table indicates that edging rolling was performed in the first stage as the 1st to 14th passes before the flat forming rolling, It shows that it is flat forming rolling.
  • edging rolling of about 40 mm was performed. Specifically, in case 2, edging rolling of about 40 mm was performed once in two passes. In Case 3, edging rolling of about 20 mm was performed twice in two passes. As shown in Table 2, the amount of flange width expansion by auxiliary edging rolling was about 24 mm in any pass in case 2 and about 44 mm in any pass in case 3.
  • Case 2 in Table 2 shows the flange width after performing auxiliary edging rolling in each pass shown in Case 1 for 1 chance in each pass under conditions that do not restrict the expansion of the flange width.
  • Case 2 of Table 2 when the auxiliary edging rolling is performed in one chance, the flange width after the auxiliary edging rolling in the 15th to 17th passes is the edging hole mold width before flat shaping rolling (1010 mm). ). Therefore, hole filling is realized in the edging final hole mold KE during auxiliary edging rolling.
  • “ ⁇ ” indicates that hole-type filling is realized and rolling stability is good.
  • Table 3 shows the transition of flange width after flat molding rolling in the conventional method (case 1), and the flange width at the time of auxiliary edging rolling after auxiliary edging rolling after each pass. This shows the transition of the flange width in consideration of the expansion (Case 2). As shown in Table 3, in the conventional method, the flange width after auxiliary edging rolling exceeds the edging hole mold width (1010 mm) before flat shaping rolling only in the fifteenth pass, and the edging final hole during auxiliary edging rolling. Hole filling is realized in the mold KE.
  • the raised portion 82b is formed at the center of the web portion 82 of the material A to be rolled in the first flat shaping hole mold KH1 (see FIG. 2 and the like) according to the present embodiment.
  • the formed raised portion 82b is erased in the second flat shaping hole mold KH2 at the subsequent stage. Then, after the bulging portion is erased, widening rolling by the in-web method is performed as necessary, and an H-shaped rough shaped material is formed.
  • the inventors of the present invention have the width L1 of the raised portion 82b formed in the first flat shaping hole mold KH1 (that is, the escape amount of the in-web method in the rolling shaping with the first flat shaping hole mold KH1. It has been found that the flange width of the finally obtained H-shaped rough shape is changed by simply changing the amount of escape. This means that as the width L1 of the raised portion 82b is increased, the flange thickness is easily secured, while the flange width is reduced by the longitudinal stretching action of the material A to be rolled at the time of the subsequent removal of the raised portion. caused by. Then, the present inventors verified the relationship between the escape amount of the in-web method in the rolling modeling with the first flat shaping hole mold KH1 and the flange width of the H-shaped rough material finally obtained.
  • FIG. 8 shows an H-shaped rough shape obtained by rolling modeling in a total of 18 passes using the first flat shaping hole mold KH1, the second flat shaping hole mold KH2, and further three widening hole molds in the subsequent stage. It is a graph which shows transition of the flange width for every pass at the time of shaping a shape material.
  • FIG. 8 shows data using a material slab having a width of about 2000 mm.
  • the horizontal axis in the graph of FIG. 8 is 1 to 18 passes, of which 1 to 13 passes correspond to the first flat shaping hole mold KH1, and 14 and 15 passes correspond to the second flat shaping hole mold KH2.
  • 16 to 18 passes correspond to the hole form of widening rolling.
  • FIG. 8 shows respective data when the escape amount L1 is changed.
  • the value shown in the following formula (1) is defined as the escape rate, and when the escape rate is 12%, 17%, 23%, 28%, 33%, 39%, 44%, 49% Data is described, and the case where the escape rate is 0% is described as the conventional method.
  • Escape rate [%] (Escape amount L1 / In-web method L2) ⁇ 100 (1)
  • the amount of shrinkage at the flange portion 80 (the amount of decrease in the flange thickness) in the first flat shaping hole mold KH1 is reduced. Therefore, as shown in FIG. 8, the flange width of the finally obtained H-shaped rough shape tends to increase as the escape rate increases. This tendency was also confirmed by experiments as shown in FIG. However, the flange width after the erasure of the raised portion and the widening rolling in the second flat shaping hole mold KH2 was not necessarily increased even if the escape rate was increased to a predetermined value or more. This is presumed to be caused by the fact that the flange shrinkage amount is increased at the time of erasure of the raised portion in the second flat shaping hole mold KH2 when the escape portion is enlarged.
  • the present inventors have focused on the relationship between the escape rate and the increase / decrease in the flange width after forming the H-shaped rough shape material, and derived a suitable numerical range of the escape rate.
  • FIG. 9 is a graph showing the relationship between the escape rate and the flange width increase / decrease rate after forming the H-shaped rough profile based on the data of FIG.
  • the flange width increase / decrease rate in FIG. 9 is the flange width when the escape rate is each value (12% to 55%) with the flange width when the escape rate is 0% as a reference (1.000). It is the value which showed.
  • the flange width of the H-shaped rough profile tends to increase as the escape rate increases.
  • the flange width increase / decrease rate was substantially constant in the region where the relief rate was about 25% or more and about 50% or less (see the broken line portion in FIG. 9).
  • the numerical range of the rate is preferably 25% to 50%.
  • the escape rate is preferably as low as possible. Therefore, it is desirable to set the escape rate to about 25%. .
  • the first flat shaping hole mold KH1 for forming the raised portion 82b is formed by the flat shaping rolling performed after the edging rolling. ing.
  • the “auxiliary edging rolling” in which the rolled material A is put back into the edging final hole mold KE after the flat shaping rolling and the light rolling is performed, the deterioration of the material permeability and the rolled material shape are suppressed. It is possible to stabilize the auxiliary edging rolling.
  • the relief ratio is set within the range of 25% to 50% (more preferably about 25%) in the formation of the raised portion 82b, and the rolling shaping is performed. It is possible to maximize the flange width of the H-shaped rough shape.
  • the present invention can be applied to a manufacturing method for manufacturing H-section steel using, for example, a slab having a rectangular cross section as a raw material.
  • pilot hole type roll (first flat shaping hole type) 86a ... hollow part 95 ... upper hole type roll (second flat shaping hole type) 96 ... lower hole type roll (second flat shaping hole type) KH1 ... 1st flat shaping hole type KH2 ... 2nd flat shaping hole type KE ... Edging final hole type GH ... General flat shaping hole type T ... Production line A ... Rolled material

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Abstract

L'invention concerne un procédé de fabrication d'acier à section en forme de H comprenant : une étape de laminage de bordure consistant à laminer et à mettre en forme un matériau à laminer en une forme prédéfinie; une étape de génération de partie surélevée consistant à laminer une partie bande en faisant tourner le matériau à laminer et à former une partie surélevée au centre de la partie bande du matériau à laminer; une étape de laminage de bordure auxiliaire consistant à faire tourner à nouveau le matériau à laminer qui a été laminé par le biais d'un ou de plusieurs passages dans l'étape de génération de partie surélevée et à remplacer le matériau à laminer en un calibre final pour l'étape de laminage de bordure pour effectuer un léger laminage réducteur; et une étape d'élimination de partie surélevée consistant à effectuer une réduction et à éliminer la partie surélevée formée dans l'étape de génération de partie surélevée. Des rouleaux de calibre supérieur et inférieur pour réaliser l'étape de génération de partie surélevée sont pourvus, au centre de la longueur de corps de rouleau des rouleaux de calibre supérieur et inférieur, d'un évidement pour former la partie surélevée au centre de la partie bande du matériau à laminer. La forme de rouleau des rouleaux de calibre supérieur et inférieur est conçue de manière à ne pas entrer en contact avec une pointe de partie bride du matériau à laminer. Les deux étapes de génération de partie surélevée et de laminage de bordure auxiliaire sont effectuées successivement une fois ou une pluralité de fois. L'étape d'élimination de partie surélevée est mise en œuvre après que l'étape de génération de partie surélevée et l'étape de laminage de bordure auxiliaire sont effectuées.
PCT/JP2018/019883 2017-05-24 2018-05-23 Procédé de fabrication d'acier à section en forme de h WO2018216742A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US16/614,000 US20200078842A1 (en) 2017-05-24 2018-05-23 Method for producing h-shaped steel
EP18806758.1A EP3593915A1 (fr) 2017-05-24 2018-05-23 Procédé de fabrication d'acier à section en forme de h
JP2018545241A JP6458917B1 (ja) 2017-05-24 2018-05-23 Ｈ形鋼の製造方法
CN201880032555.0A CN110636908A (zh) 2017-05-24 2018-05-23 H型钢的制造方法
PH12019502500A PH12019502500A1 (en) 2017-05-24 2019-11-07 Method for producing h-shaped steel

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JP2017-102423 2017-05-24
JP2017102423 2017-05-24

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EP (1) EP3593915A1 (fr)
JP (1) JP6458917B1 (fr)
CN (1) CN110636908A (fr)
PH (1) PH12019502500A1 (fr)
WO (1) WO2018216742A1 (fr)

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CN114309057A (zh) * 2021-12-30 2022-04-12 无锡市方顺型钢科技有限公司 一种异型钢的冷轧加工方法

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JPS57146405A (en) * 1981-03-05 1982-09-09 Kawasaki Steel Corp Broadside rolling method and rolling roll for large sized blank material for rough shape
JPS57146405U (fr) 1981-03-09 1982-09-14
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JPS5935802U (ja) 1982-08-31 1984-03-06 トヨタ自動車株式会社 ブレ−キブ−スタ−のプツシユロツド測定治具
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