• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of this invention is a device (1) for the production of galvanized thin-strip cast steel strip (12) with a pickling section (5), a skin pass mill (6) and a galvanizing plant (9). According to the invention, the galvanizing plant (9) is an electrolytic galvanizing plant (9), wherein the pickling section (5), the skin pass mill (6) and the electrolytic galvanizing plant (9) are arranged one behind the other without a treatment plant for the thermal treatment of the steel strip (2) being interposed therebetween. is provided. The subject of this invention is also a process for the production of galvanized, thin-band cast steel strip.
    公开号:AT516956A4
    申请号:T50564/2015
    申请日:2015-06-29
    公开日:2016-10-15
    发明作者:Franz Ing Msc Plaschka；Arthur Stingl；Peter Eisenköck
    申请人:Andritz Ag Maschf；
    IPC主号:
    专利说明:

    DEVICE AND METHOD FOR PRODUCING A ZINCED STEEL STRIP
    The subject of this invention is a device for the production of galvanized, thin-band-cast steel strip with a pickling section, a skin pass mill and a galvanizing plant. The subject of this invention is also a corresponding method for the production of galvanized, thin-band cast steel strip in a pickling / galvanizing combi-line.
    Thin-belt casting is a continuous, near-net-shape casting process developed from continuous casting.
    In the plant typically rolling stands are classified, in which after the rolling passes already a strip thickness of about 1 mm is obtained. The rolled thin strip is cooled and wound up on rolls, so-called bundles or "coils".
    The thin strip is therefore a hot strip (thin strip hot rolled strip SPHC, SPHD, SPHE, HSLA330-440 according to EN 10051).
    Such processes for the production of steel strips in thin strip casting plants are also known under the names ESP (Endless Strip Production from Primetals), ISP (In-line Strip Production), CSP (Compact Strip Production from SMS) and QSP (Quality Strip Production from Danieli).
    In order to produce galvanized thin-strip-cast steel strip, it is state of the art either to pickle the starting material (thin strip) in a hot-dip galvanizing plant
    To heat hot-dip galvanizing and then coat in the dipping process or perform this procedure in a combination line.
    Unlike galvanizing cold-rolled strip, where the annealing process is combined with hot-dip galvanizing, the thermal process / reheating and cooling of the steel strip is only required for the galvanizing process and has no metallurgical significance when galvanizing thin-strip cast strip. This thermal process is very energy intensive.
    The invention has for its object to provide a system for a fast and cost-effective production of galvanized thin-strip cast steel strip.
    This object is achieved by a device with a pickling section, a skin pass mill and an electrolytic galvanizing plant. The pickling section, the skin pass mill and the electrolytic galvanizing plant are arranged one behind the other without the provision of a treatment plant for the thermal treatment of the steel strip in between.
    In the device according to the invention, the thermal process is not required and thus energy is saved. This makes it possible to produce thin-dipped thin-strip-cast steel strip with lower production costs. In addition, the setup time is shorter here, since the heating and cooling phase of the furnace is eliminated.
    According to the invention, the starting material used is a steel strip produced in a thin-strip casting plant, which leaves the thin-strip casting line of approximately final thickness.
    This strip is not cold rolled but the thin strip is fed directly after the Dünnbandgießanlage in the form of a federal government of the device according to the invention.
    Preferably, a scale breaker is placed in front of the pickling section to aid in scale removal in the pickling section.
    It is favorable if a stretch straightener is arranged after the skin pass mill. The stretcher ensures a good flatness of the strip, which is necessary in order to avoid contact (short circuit) with the anodes in the galvanizing plant and, on the other hand, to reduce electricity costs.
    In a preferred embodiment of the invention is in front of the electrolytic galvanizing plant a
    Decoction unit with sink arranged to activate the steel strip surface before galvanizing, for example with dilute sulfuric acid.
    The electrolytic galvanizing plant is preferably a plant as described in EP 0 101 429 A1 (GRAVITL plant). The metal strip is guided in a direction deviating from the horizontal direction, wherein the electrolyte flows between at least one plate-shaped anode and the metal strip as the cathode. The electrolyte flows freely from a vessel in the upper area of the anode into the space between anode and metal strip and flows down as a closed flow volume under the influence of gravity. The thin strip is therefore guided here essentially in the vertical direction by a plurality of current-carrying deflection rollers.
    To avoid scratches on the galvanized thin strip, it is advantageous if the deflection roller at the end of the galvanizing plant is a rubberized deflection roller.
    Optionally, it is also possible to arrange a further coating system after the electrolytic galvanizing plant. In this coating system, an additional layer, such as, for example, an antifingerprint coating, or a Cr3 passivation, a Cr-free passivation or phosphating can be carried out using the roll application method, spraying or dipping method.
    The invention also provides a corresponding method for the production of galvanized, thin-strip cast steel strip, which is first pickled, dressed and electrogalvanized. The thin-strip-cast steel strip is continuously pickled, dressed and electrolytically galvanized in a continuous strip treatment plant, without being subjected to a thermal treatment.
    Thus, a particularly efficient production of thin-dipped, thin-strip-cast steel strips in cold strip dimensions is made possible.
    In one embodiment of the method according to the invention, the steel strip is electrolytically coated with a thin nickel layer before the galvanizing (Ni-flash coating). As a result, surface defects are repaired.
    FIG. 1 shows a schematic embodiment of the invention.
    The strip processing line comprises a device 1 for producing galvanized, thin-strip-cast steel strip 12. In an inlet section 3, the thin-strip-cast steel strip 2 is unwound from the bundle. In this case, the beginning of the tape is connected to a welding machine with the tape end of the previous tape to form an endless belt.
    Subsequently, the steel strip 2 is fed to a scale breaker 4 and broken therein the scale and the band shape (edge waves and saber) improved. Thereafter, the belt moves into the pickling section 5, which is operated here with hydrochloric acid (45 -190 g / 1 HCl free). Thereafter, the surface roughness of the pickled strip 2 is adjusted in the skin pass 6 and improved together with the stretch-bending straightener 7 the strip flatness and so optimally prepared for the subsequent electrolytic galvanizing 9.
    To activate the surface of the steel strip 2 for the electrolytic galvanizing 9, the strip 2 passes through a pickling 8 with a sink in which the steel strip 2 is treated with dilute sulfuric acid (50-100 g / l total HSO) 4. Subsequently, the band 2 passes through the electrolytic galvanizing 9, in which one or both sides zinc is applied in the electrolytic process. For example
    TM galvanizing takes place in GRAVITEL galvanizing cells from Andritz. Such galvanizing cells are described, for example, in EP 0 101 429 A1.
    As an aftertreatment, there is the option of providing a further coating unit 10 in the line, in which, for example, in the roll application method, spraying or dipping method, a further layer is applied and dried. This further layer may be, for example, an antifingerprint coating, a Cr3 passivation, a Cr-free passivation or a phosphating.
    The finished galvanized and finished belt 12 is finally wound on the reel (11) to form a bundle.
    It would also be conceivable that a so-called electrolytic nickel flash system is provided directly in front of the galvanizing plant 9, in which the strip is coated on both sides with a thin nickel layer (50 mg / m 2) (electrolyte: sulfuric acid: about 20 g / 1NiSO 4) ^ approx. 5 g / 1 HSO) a This will better cover surface defects.
    权利要求:
    Claims (10)
    [1]
    claims
    1. Device (1) for the production of galvanized, thin-strip cast steel strip (12) with a pickling section (5), a skin pass mill (6) and a galvanizing plant (9), characterized in that the galvanizing plant (9) is an electrolytic galvanizing plant (9) and that the pickling section (5), the skin pass mill (6) and the electrolytic galvanizing plant (9) are arranged one behind the other, without a treatment plant for the thermal treatment of the steel strip (2) being provided therebetween.
    [2]
    2. Apparatus according to claim 1, characterized in that before the pickling section (5) a scale breaker (4) is arranged.
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that after the skin pass mill (6) a stretch straightener (7) is arranged.
    [4]
    4. Device according to one of claims 1 to 3, characterized in that in front of the electrolytic galvanizing plant (9) a Dekapierungsanlage (8) is arranged with sink for activating the steel strip surface before galvanizing.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the electrolytic galvanizing plant (9) comprises a plurality of deflection rollers around which the steel strip (2) is guided, wherein a part of the deflection rollers are power rollers and wherein the deflection roller at the end of the galvanizing plant (9) is a rubberized guide roller.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that after the electrolytic galvanizing plant (9), a further coating system (10) is arranged.
    [7]
    7. A process for the production of galvanized, thin-strip cast steel strip (12), which is first pickled, dressed and electrogalvanized, characterized in that the thin strip cast steel strip (2) is continuously pickled in a continuous strip treatment plant (1), dressed and electrolytically galvanized, without being subjected to a thermal treatment.
    [8]
    8. The method according to claim 7, characterized in that the steel strip (2) before the electrolytic galvanizing (9) is coated with a nickel layer.
    [9]
    9. The method according to claim 7 or 8, characterized in that on the galvanized steel strip, a further zinc-containing layer is applied before it is wound up.
    [10]
    10. Galvanized, thin-band-cast steel strip (12), characterized in that it has been produced by a method according to one of claims 6 to 9.
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    同族专利:
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    WO2017001283A2|2017-01-05|
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    CN107709626A|2018-02-16|
    WO2017001283A3|2017-03-16|
    引用文献:
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    CN112139360A|2020-09-30|2020-12-29|日照皓诚电子科技有限公司|Method for processing spring piece for tuning fork type crystal resonator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50564/2015A|AT516956B1|2015-06-29|2015-06-29|DEVICE AND METHOD FOR PRODUCING A ZINCED STEEL STRIP|ATA50564/2015A| AT516956B1|2015-06-29|2015-06-29|DEVICE AND METHOD FOR PRODUCING A ZINCED STEEL STRIP|
    PCT/EP2016/064559| WO2017001283A2|2015-06-29|2016-06-23|Device and method for producing a galvanized steel strip|
    CN201680033948.4A| CN107709626A|2015-06-29|2016-06-23|For manufacturing the apparatus and method of zinc-plated steel band|
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