WO2019228985A1 - Procédé servant à éviter des colles pour bande sur du matériau en bande fabriqué par laminage flexible - Google Patents

Procédé servant à éviter des colles pour bande sur du matériau en bande fabriqué par laminage flexible Download PDF

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Publication number
WO2019228985A1
WO2019228985A1 PCT/EP2019/063658 EP2019063658W WO2019228985A1 WO 2019228985 A1 WO2019228985 A1 WO 2019228985A1 EP 2019063658 W EP2019063658 W EP 2019063658W WO 2019228985 A1 WO2019228985 A1 WO 2019228985A1
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WO
WIPO (PCT)
Prior art keywords
metal strip
coil
wound
less
thickness
Prior art date
Application number
PCT/EP2019/063658
Other languages
German (de)
English (en)
Inventor
Jürgen Butzkamm
Alexander EICK
Christian Reuter
Sven SCHARZ
Original Assignee
Muhr Und Bender Kg
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 Muhr Und Bender Kg filed Critical Muhr Und Bender Kg
Priority to CN201980035936.9A priority Critical patent/CN112203783A/zh
Publication of WO2019228985A1 publication Critical patent/WO2019228985A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/003—Regulation of tension or speed; Braking
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/663—Bell-type furnaces
    • C21D9/667—Multi-station furnaces
    • C21D9/67—Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere

Definitions

  • the invention relates to a method for avoiding tape adhesives, in particular flexibly rolled metal strip.
  • EP 0 760 396 A1 discloses a method for avoiding the annealing of cold-rolled strips, in which the strip surface is oxidized above 600 ° C. during the holding time.
  • WO 03/000438 A1 a method and a belt treatment plant for avoiding tape adhesives during reel is known, in which the axial pressure over the fire width on the coiler mandrel is measured in order to control the control values of the strip rolling mill with the measured values.
  • the above methods each relate to the treatment of constant thickness strip material over the length. However, they are not sufficiently suitable to avoid the emergence of tape adhesives on flexibly rolled strip. Flexibly rolled strip material has a variable thickness over the length, which, when wound up or wound up, results in a coil structure with a variable radius over the circumference and thus possibly also variable stress properties over the circumference.
  • the present invention is therefore based on the object, vorzu a method with which the occurrence of tape adhesives, especially of flexible ge rolled metal strip, can be effectively reduced or avoided.
  • One solution lies in a method for avoiding tape adhesives on flexibly ge rolled metal strip, wherein the metal strip is wound into a coil after the flexible rolling and subjected to a heat treatment, wherein the flexible rolled metal strip before the heat treatment at least in a particular ra dial outside Part of the coil is wound with a take-up of less than 40 N / mm 2 based on a cross-sectional area of the metal strip.
  • the coiled coil acting in the circumferential direction of the stresses are relatively low, so that the mutually superimposed band surfaces are pressed together less strongly , As part of the heat treatment thus leads to lower adhesion effects, so that tape adhesive can be avoided when rewinding the coil Abwi.
  • at least one radially outer portion of the coil is wound with a take-up tension of less than 40 N / mm 2 with respect to a cross-sectional area of the metal strip.
  • the take-up is adjusted depending on an average thickness of the metal strip over the length.
  • the average thickness of the band or band sections can in principle be arbitrary.
  • the mean value can be determined based on the geo metric mean value of the thickness profile over the length of the strip material or one or more band sections according to a first possibility.
  • the average value can also be determined as the absolute average value between a maximum thickness and a smallest thickness of a band section or a total length of the band.
  • the mean value of the belt thickness can be determined with one of the Strip hardening corresponding code multiplied. Furthermore, from the mean value of the strip thickness multiplied by the strip width, an average cross-sectional area can be calculated, which can be used to determine the winding over the length of the strip material.
  • strip material having a substantially uniform sheet thickness is rolled over the length by changing the roll gap during the process into strip material having a particularly variable sheet thickness.
  • the sections of different thickness produced by the flexible rolling extend transversely to the longitudinal direction or to the rolling direction of the strip material.
  • the flexible rolling can be performed in example so that a first portion has a thinner first Di bridge, as a thicker second section, wherein the ratio of first thickness to second thickness less than 0.8, in particular less than 0.7, in particular smaller Can be 0.6.
  • the absolute thickness of the strip material may, for example, be between 0.7 mm in thin areas and 4.0 mm in thick areas.
  • the strip material can be wound up immediately after the flexible rolling, that is, from the coiler of the rolling mill in the manner mentioned with low strip tension.
  • the strip material can be initially wound up with higher strip tension after flexible rolling, and then wound up in the course of a separate wrapping process with the said low tensile forces, before it is subsequently annealed.
  • the strip material may in principle be made of any metal or metal alloys, for example of iron-containing metals, in particular steel, or light metals, in particular aluminum, magnesium or alloys containing light metals.
  • steel hot strip or cold strip can be used, these terms in the meaning of the jargon for different Bandbreitenberei be understood.
  • hot strip is meant a rolled steel finished product (steel strip) produced by rolling after preheating.
  • cold strip is meant a cold-rolled steel strip (flat steel). Cold rolled is flat steel designated, the last reduction in thickness by rolling without previous He warming takes place.
  • IF steels Interstitial Free
  • dual phase steels dual phase steels
  • multiphase steels multiphase steels
  • TRANSformation Induced Plasticity (TRIP) steels and microalloyed steels can be used without being limited thereto.
  • a strip material having a width of at least 400 mm is used, in particular of at least 500 mm.
  • the contact surface of the superposed band were relatively large in relation to the total width.
  • the intended for flexible rolling metal strip may have a maximum width of up to 2500 mm, in particular of up to 1300 mm, without being limited thereto.
  • the coil of wound strip material may have an outer diameter of less than 2500 mm, in particular less than 2200 mm. Preferably, the outer diameter is greater than 1500 mm.
  • the inner diameter of the coil may be greater than 500 mm and / or less than 700 mm, for example.
  • variable take-up tension means that the coil is wound up with a different winding force at least in a first coil section than in a second coil section spaced radially or circumferentially therefrom.
  • the metal strip can be divided into ring sections, for example, in lengths, be relationship as the coil, which are gradually wound under different tensile forces.
  • the coil as a function of the length of the belt, or of the coiling zuneh ing diameter of the coil, continuously wi with varying tensile forces to wi, for example, as a linear function.
  • the flexibly rolled metal strip is wound in a radially inner portion of the coil with a larger Aufwickelzug, as in a radially outer portion.
  • the inner portion may be a portion inner half of an inner third of the coil, or extend over the entire inner third of the coil.
  • inner third of the coil is meant the annular portion between the inner diameter and an intermediate diameter of the coil, wherein the intermediate diameter is one third of the difference between the outer diameter and the inner diameter.
  • the radially outer portion may be a portion within an outer third of the coil, or extend over the entire outer third of the coil.
  • the ring portion between the outer diameter and a Zwi diameter of the coil is meant, wherein the intermediate diameter is two-thirds of the difference between the outer diameter and the inner diameter.
  • the winding tension can be adjusted depending on the sheet thickness and the strength of the mate rials.
  • the metal strip in the radially inner lie ing section a Aufwickelzug of at least 5 N / mm 2 , in particular at least 10 N / mm 2 min, optionally also at least 15 N / mm 2 and / or up to 40 N / mm 2 , in particular up to 35 N / mm 2 , optionally up to 30 N / mm 2 , in each case based on the cross section of the strip material.
  • the cross section of the strip material may refer to a smallest, largest or a middle cross section of the strip material. It is understood that the values given are exemplary and that each of the above-mentioned upper values can be combined with each of the lower values mentioned.
  • the winding pulls can be at least 10%, in particular at least 20%, depending on the material also at least 30% less than the winding tension in the inner coil section in the outer portion of the coil, for example.
  • the winding tensile forces can be greater, the thicker the strip material and the higher the strength of the strip material.
  • the winding tensile force can be radially inward, for example between 20 and 30 N / mm 2 and radially outside between 10 and 25 N / mm 2 .
  • the winding tension radially inward for example, between 10 and 25 N / mm 2 and radially outside between 5 and 15 N / mm 2 are.
  • lubricant in particular oil
  • the amount of lubricant applied is in particular at least 0.5 g / m 2 and / or up to 3 g / m 2 , in each case based on the surface of the strip material.
  • rolling the strip material undergoes a hardness increase, which is also referred to as rolling hard state.
  • a micro-alloyed fine grain steel called S550MC as a raw material has a yield strength of 550 MPa and a tensile strength of 620 MPa. After rolling, the tensile strength can be over 900 MPa.
  • the rolled and coil-wound strip material is annealed in a crucible annealing furnace. As a result, a recrystallization annealing takes place in which the hardness is reduced again and the formability is restored.
  • a heat treatment of the coil in a hood furnace comprises the phases of heating, holding and cooling.
  • the coil during heating in a temperature range of 100 ° C to 600 ° C with an average heating rate of at least 0.50 ° C / min and / or a maximum of 1, 8 ° C / min is heated, in particular with an average heating rate of 0.80 ° C / min to 1, 40 ° C / min.
  • the coil is cooled at a cooling rate of less than 0.35 ° C./min, at least in a first temperature range after leaving the holding time.
  • the temperatures given refer in particular to the temperatures measured at the control element of the furnace.
  • a protective gas can be introduced into the hood furnace.
  • the average amount of inert gas during the heating time in a Tem temperature range of 200 ° C to 600 ° C maximum 0.5 m 3 / h per ton of befindli chen in the furnace strip material, in particular not more than 0.25 m 3 / h.
  • FIG. 1 shows a method according to the invention for avoiding tape adhesives of rolled strip material as a schematic flow diagram in a first embodiment
  • FIG. 2 shows a method according to the invention for avoiding tape adhesives of rolled strip material as a schematic flow diagram in a modified embodiment
  • Figure 3 shows a coil made of flexible rolled strip material in three-dimensional presen- tation prepared by the method according to the invention
  • Figure 4 shows a detail of the coil of Figure 3 in axial view in an enlarged view
  • Figure 5 shows the coil of Figure 3 in axial view with drawn dimensions
  • Figure 6 shows two layers of superposed turns of the coil of Figure 3 in
  • FIG. 7 shows, by way of example, a thickness profile of a strip section or a board cut from the metal strip
  • FIG. 8 shows the temperature course over time during the heat treatment of a
  • FIGS. 1 to 9 will be described together below.
  • FIG. 1 shows a method according to the invention for preventing tape adhesives from rolled strip material, in particular from flexibly rolled strip material 2.
  • the strip material 2 which is also generally referred to as a substrate and is wound on a coil 3 in the initial state, is rolling works, preferably by means of flexible rolling.
  • the Bandma is material 2, which has a largely constant sheet thickness over the length before the flexible rolling, by means of rollers 4, 4 'so rolled that it receives along the rolling direction a variable sheet thickness d2.
  • the work rolls 4, 4 ' are supported by means of support rollers 5, 5'.
  • the process is monitored and controlled using the data obtained from a sheet thickness measurement 6 as input to control the rolls 4, 4 '.
  • the strip material 2 After the flexible rolling, the strip material 2 has different thicknesses in the rolling direction.
  • the strip mate rial starting from the substrate with a uniform thickness, with degrees of rolling of 3% to over 40%, in particular in sections also over 50%, are rolled.
  • the starting thickness of the substrate may be, for example, between 0.7 mm and 4.0 mm, without being limited thereto.
  • the flexibly rolled material has accordingly thicker and thinner thicker tape sections, which are made according to a pre-specified nominal thickness profile.
  • the substrate may in principle be made of any rollable metal or Metalllegie tion, for example, iron-containing metals, in particular steel, or light metals, in particular aluminum, magnesium or alloying alloys containing light metals.
  • the strip material 2 for example, have a width B2 of at least 400 mm, in particular of at least 500 mm.
  • the metal strip used for flexible rolling may have a maximum width B2 of up to 2500 mm, in particular of up to 1300 mm, without being limited thereto.
  • the length L2 of the strip material then results from the predetermined diameter D3 of the coil 2 wound to the coil 3 and the thickness profile d2 over the length L2 of the strip. With an average thickness of 1, 5 mm, the band material, for example, have a length of about 2000 m.
  • the coil 3 of wound strip material 2 may, for example, have an outer diameter D3o of approximately 2000 mm.
  • the inner diameter D3i of the coil 3 may be, for example, greater than 500 mm and / or less than 700 mm.
  • a lubricant 22 preferably oil or an oil-containing agent by means of a corresponding applicator 21 are applied to the flexible rolled metal strip 2.
  • the amount of oil applied is in particular between 0.5 g / m 2 and 3 g / m 2 , based in each case on the surface 23 of the strip material 2.
  • the lubricant can be sprayed onto the strip material 2 in the form of a spray.
  • the flexibly rolled metal strip 2 can be wound up with different winding trains over the length L2 of the metal strip 2.
  • the metal band 2 can be generouswi in a radially inner portion 1 1 with larger features F1 1, for example, at least 10% larger than the winding trains F13 of the radially outer portion 13.
  • the inner section 11, which may also be referred to as the core in this embodiment is an inner third of the coil 3.
  • the middle portion 12 and the outer portion 13 of the coil 3 are preferential, wound with smaller Wickelmann F12, F13.
  • the outer ring portion 13 can be wound in the said steel material, for example, with a tensile force F13 of 20 to 30 N / mm 2 based on the average cross-sectional area.
  • the winding tension F12 for the middle ring portion 12 of the coil 3 extending between the diameters D1 1 and D13 may be identical to the winding tension F13 for the outer coil portion 13 or may be selected in size between the inner winding tension F1 1 and the outer winding tension F13 ,
  • the winding tensile force radially inward for example less than 25 N / mm 2 , in particular between 10 and 20 N / mm 2 , and radially outside less than 15 N / mm 2 , in particular 5 and 10 N / mm 2 lie.
  • the take-up pull can be adjusted as a function of a mean thickness dm of the metal strip 2 over the length L2.
  • the calculation of the mean thickness dm of the band or band sections can for example be based on the geometric mean of the thickness profile d2 over the length L2 of the tape or the tape sections, or as an absolute average between a maximum thickness and a smallest thickness of each considered band section and / or the total length of the tape.
  • FIG. 7 shows a It can be seen that the board 7 has a variable thickness D7 over the length L7 of the board, it being understood that the thickness profile of the tape or the boards to be produced therefrom can have any other regular or irregular, symmetrical or unsymmetrical shape.
  • the average thickness dm of the band portion 2 for manufacturing the present board 7 can be determined, for example, by the average between the largest thickness d8b and the smallest thickness d8.
  • the thickness dm, and in particular also the width B2 of the band section or band, are then used to determine the band tensile forces F for the winding, wherein the calculated mean value dm can be multiplied by a characteristic number of the material corresponding to the band consolidation.
  • the wound coil 30 is subjected to a heat treatment in the process of step S40 to soften the material rolled by rolling into a hard-rolled state.
  • This form of heat treatment is also referred to as recrystallization annealing.
  • the heat treatment is carried out in a crucible annealing furnace 41, without being limited thereto.
  • FIGS. 8 and 9 an exemplary heating curve in the heat treatment S40 of the coil material 2 wound to the coil 3 is shown. It can be seen that the phases heat up S42, hold S43 and cool down S44.
  • the average heating rate R42 during heating S42 in a temperature range of 100 ° C to 600 ° C for steel materials is preferably between 0.50 ° C / min and 1, 8 ° C / min, in particular between 0.80 ° C / min and 1.40 ° C / min. It may also be provided the material is cooled in a first temperature range T44 after leaving the holding time S43, with a cooling rate R44 of less than 0.35 ° C / min.
  • the specified temperatures relate in particular to the rule according to Regelele from the furnace temperatures.
  • a shielding gas may be introduced into the hood furnace 41.
  • the average amount of protective gas G42 during the heating phase S42 here for example between approximately 2.0 and 8.0 hours, in a temperature range from 200 ° C. to 600 ° C., is 20 m 3 at most.
  • h is, in particular a maximum of 10m 3 / h.
  • the specified amounts of inert gas G42 relate to the total tonnage of the coils in the furnace, which may in particular be between 40 and 60 tons of strip material.
  • the strip material 2 is unwound in the next method step S50 by means of an unwinding device 50 from the coil 30 and the further processing, in this case a separation S60 of the strip material 2 to individual sheet metal blanks 7.
  • the singulation of the strip material 2 sheet metal blanks 7 takes place For example, by means of a punching or cutting tool 61. Depending on the shape of the sheet metal blanks 7 to be produced this can be punched out of the strip material 2 as a shaped cut, with an edge stops on the strip material, which is not used further, or the strip material 2 can easily in Tail pieces are cut to length.
  • a forming of the board 7 to the desired end product takes place in a suitable molding tool 71, in particular by means of cold forming, whereby hot forming is likewise possible.
  • FIG. 2 shows a method according to the invention for avoiding tape adhesives or for producing a product from a strip material 2 in one modified process management. This corresponds largely to the method of Figure 1, so that reference is made to the above description in terms of similarities.
  • the same or modified Einzelhei th are provided with the same reference numerals, as in Figure 1.
  • the strip material 2 is wound after the flexible rolling S10 in a separate step S30 with the small winding turns of less than 40 N / mm 2 relative to the cross-sectional area, the winding optionally being sprayed with lubricant in step S20 22 can be switched on.
  • This process is also called a wrapping process.
  • the Ver individually S50 and forming S60 can be downstream.
  • the abovementioned methods according to the invention or the coils 3 wound in accordance with the invention have the advantage that the stresses acting in the circumferential direction are relatively low, so that the strip surfaces lying on one another in the coil are pressed against one another to a lesser extent.
  • the special heat treatment can additionally have a favorable effect on the stresses acting in the circumferential direction, so that tape adhesives are avoided when rewinding the coil.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

L'invention concerne un procédé servant à éviter des colles pour bande sur une bande de métal fabriquée par laminage flexible. Une bande de métal (2) est enroulée après le laminage flexible (S10) en la bobine (3) et est soumise à un traitement thermique (S40). La bande de métal (2) fabriquée par laminage flexible est enroulée avant le traitement thermique (S40) au moins en une section annulaire (13) de la bobine (3) avec une contrainte d'enroulement (F13) inférieure à 40 N/mm² par rapport à une surface de section transversale (A) de la bande de métal (2).
PCT/EP2019/063658 2018-05-30 2019-05-27 Procédé servant à éviter des colles pour bande sur du matériau en bande fabriqué par laminage flexible WO2019228985A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980035936.9A CN112203783A (zh) 2018-05-30 2019-05-27 用于避免柔性轧制的带材上的带粘结的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18175239.5A EP3575008B1 (fr) 2018-05-30 2018-05-30 Procédé permettant d'éviter le collage de bande à un matériau en bande laminé flexible
EP18175239.5 2018-05-30

Publications (1)

Publication Number Publication Date
WO2019228985A1 true WO2019228985A1 (fr) 2019-12-05

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PCT/EP2019/063658 WO2019228985A1 (fr) 2018-05-30 2019-05-27 Procédé servant à éviter des colles pour bande sur du matériau en bande fabriqué par laminage flexible

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EP (1) EP3575008B1 (fr)
CN (1) CN112203783A (fr)
WO (1) WO2019228985A1 (fr)

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CN111257032B (zh) * 2020-03-19 2022-09-20 中铝瑞闽股份有限公司 一种铝合金热轧卷材取样方法
CN114561696A (zh) * 2022-02-25 2022-05-31 电子科技大学 一种超大面积单晶金属箔的制备方法

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WO2003000438A1 (fr) 2001-06-23 2003-01-03 BFI VDEh-Institut für angewandte Forschung GmbH Procede et installation de manipulation de feuillards, notamment train de laminoir ou cage de laminoir, pour eviter que les feuillards ne collent lors du bobinage
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Publication number Priority date Publication date Assignee Title
DE19531447A1 (de) * 1995-08-26 1997-02-27 Messer Griesheim Gmbh Verfahren zum Vermeiden von Klebern beim Glühen von Kaltband
EP0760396A1 (fr) 1995-08-26 1997-03-05 Messer Griesheim Gmbh Procédé pour éviter le collage de bande d'acier pendant le recuit
DE19750780A1 (de) 1997-11-10 1999-05-20 Mannesmann Ag Arbeitsverfahren zum Aufbringen einer definierten Oberflächenrauhheit auf ein Metallband
WO2003000438A1 (fr) 2001-06-23 2003-01-03 BFI VDEh-Institut für angewandte Forschung GmbH Procede et installation de manipulation de feuillards, notamment train de laminoir ou cage de laminoir, pour eviter que les feuillards ne collent lors du bobinage
DE10162702C1 (de) * 2001-12-19 2003-04-17 Messer Griesheim Gmbh Verfahren zur Vermeidung von Klebern und Kratzern beim Rekristallisationsglühen von Kaltband
WO2006024526A2 (fr) * 2004-09-02 2006-03-09 Theodor Stuth Procede de fabrication de bandes metalliques
DE102005042020A1 (de) * 2005-09-02 2007-03-08 Sms Demag Ag Verfahren zum Schmieren und Kühlen von Walzen und Metallband beim Walzen, insbesondere beim Kaltwalzen, von Metallbändern

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Publication number Publication date
EP3575008A1 (fr) 2019-12-04
EP3575008B1 (fr) 2022-08-24
CN112203783A (zh) 2021-01-08

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