• 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 present invention relates to a method for producing a preferred component for loading from sheet steel. According to the method, the strip is cast between two cooling rollers with a variable gap, the thickness of the strip being poured into the nip formed by the roller or by varying the time the strand cell is in contact with the roller. It is changed by changing the strength of the cooling action of the roller with respect to. The strip of this type has a uniform microstructure and can be continuously improved to suit the requirements of a particular application by hot or cold rolling.
    公开号:KR20010074990A
    申请号:KR1020017002951
    申请日:1999-08-27
    公开日:2001-08-09
    发明作者:슈미츠빌헬름；젠크디터；알브레히트-프뤼울리히；코프라이너
    申请人:추후제출；티센 크루프 슈타알 악티엔게젤샤프트；
    IPC主号:
    专利说明:

    Optimal steel strip manufacturing method for loading {METHOD FOR PRODUCING LOAD-OPTIMISED STEEL STRIPS}
    [2] In order to have no sudden change in thickness and to obtain the desired components for loading, all recent tests are carried out with flexible cold rolling, ie cold rolling of steel, where the nip between the rolling It changed depending on the movement. (B. Hachmann, R.Kopp, Aachen, "Preferred Longitudinal Rolling for Loading", pages 4.2-1 to 4.2-6, "Umformtechnik", (= Shape Technology), Seventh Aachen River Seminar, March 1992 26 and 27, Institut fur Bildsame Formgebung (= soft shape instrument), Rhineland-Westphalia Technical University, Aachen). However, the tests still yielded practically unusable results. Besides the difficulty of reaching the required high rolling force, another difficulty is that during cold rolling the steel strip is affected by different levels of shape over the length of the steel strip. Other coagulations associated with it are undesirable for most applications.
    [1] For the purpose of saving raw materials and energy, attempts have been made for several years to manufacture desirable building components for loading. In particular, in the case of motor vehicles where weight plays an important role in fuel consumption, the above efforts have led to the use of components manufactured from tailored blanks at different locations for motor vehicles. Such components constitute parts of metal plates of different thickness welded to each other. Of course, due to sudden changes in thickness, not all places in the continuous loading mode are optimal.
    [10] 1 is a schematic view showing one embodiment of the present invention.
    [3] It is an object of the present invention to provide a method which is used directly for the production of steel strips preferred for loading and which further allows steel strips to be shaped during the cold rolling without the drawbacks described above.
    [4] The present invention therefore relates to a method for the manufacture of a steel strip which is preferred for loading and for having a continuously varying thickness in the longitudinal direction of the steel strip. According to the invention such a method is directed to the cooling of the rollers acting by casting in two cold roll yarns in which steel strips have variable nips and in the molten steel cast into a gusset formed by the rollers. Depending on the movement of the cast steel strip penetrating through it, the thickness of the steel strip was thus converted to provide a change in the length of the steel sheet at a thickness of 10 to 40%.
    [5] A strip with a homogeneous structure but with a different thickness throughout its length can be produced by the method according to the invention. Such steel strips provide an optimum prerequisite for continuous further shaping by hot rolling or in particular cold rolling. A certain level of shape can be achieved without problems if the strip is cold rolled.
    [6] In the practice of the invention there are other possible ways of adjusting the thickness of the steel strip through the cooling of the rolls. In one possible implementation of the invention the cooling of the roller is affected by the time of direct contact with the molten steel. In practical fact this may be done by adjusting the circumferential speed of the roll and / or through the height of the molten metal. However, another possibility is that cooling is affected by the heat flow between the roll and the molten steel. In practical fact this can be done through the surface structure of the roll and / or through an inert gas atmosphere and / or casting oil.
    [7] Since the thickness of the steel strip is influenced by the cooling of the roll and thus through the strand shell of the steel sheet in the forming process, a simple adjustment of the bearing force can be used, and the roll can be operated with a slightly constant increasing bearing force. . If the strip becomes thicker, cooling will increase as a result of thick stranded cells. This means that the rolls cause backing and form large nips. Conversely, the support roll is adjusted if cooling is reduced, thus making the strand cell thinner. In any case, the procedure ensures that the strand cells are in contact with each other and welded to each other at the kissing point, ie the opposite vertex of the roll.
    [8] If the casting strip is further reduced in thickness, it can be hot rolled. In addition, the structure of the steel strip can be affected more particularly by cold rolling and by possible recrystallization annealing.
    [9] The invention will be described in more detail with reference to the implementation of the device shown in the drawings suitable for the process according to the invention.
    [11] Two cooling rolls 1, 2 driven in opposite directions form a nip therebetween. The nip forms a reinforcement plate so that the molten steel is cast from the casting tank 3. The molten steel solidifies in the region near the cooling rolls 1, 2, so that the strand cells 4, 5 meet and form at the nearest place of the nip (called the kissing point 6). At this location the strand cells 4, 5 are welded together to form a strip 7 which is pulled out in the direction indicated by the arrow z.
    [12] In order to manufacture the steel strip 7 which has a thickness change in the longitudinal direction, the distance between the rolls 1 and 2 can be changed. In addition, strand cells 4 and 5 of different thickness are formed through cooling exerted by the rolls 1 and 2 on the molten steel. There are many possible ways to influence cooling. For example, cooling is effected through the heat flow from the cooling rolls 1 and 2 to the molten steel. The divided rolls 1, 2 described in the practice showed that the parts may have different surface structures as parts. However, they must be cooled to a different range. However, cooling can be affected by changing the inert gas that forms the atmosphere at the place where the casting is formed. However, the influence may be possible through the casting oil present between the melt and the generated surface of the roll. However, the fast reaction obtained with respect to special effects and cooling can be obtained by changing the contact time between the rolls 1 and 2 and the molten steel. For example, the height of the molten steel can be quickly affected through the deposition member 8 acting as a conversion element. The deposition member must be adiabatic and in particular made of ceramic. However, finally the influence is possible by the circumferential speed of the rolls 1, 2. In the last two cases cooling is influenced by the contact time between the rolls 1 and 2 and the molten metal. Reduction of the circumferential speed results in a long contact time, thus making the strand cell thicker, while an increase in the circumferential speed shortens the contact time and thus thins the strand cell.
    [13] The distance between the rolls 1 and 2 can be adjusted by an adjustment member (not shown). Preferably the adjustment member operates with a constant bearing force or with a slightly larger bearing force with increased distance. In this case the adjustment of the exact distance is particularly simple, so the width of the nip is adjusted spontaneously depending on the thickness of the strand cells 4, 5. In essence, the small ΔS for the thickness of the steel strip, which is a rigid stand, corresponds to the large ΔK for the rolling force, and the large ΔS, which is a soft stand, corresponds to the small ΔK.
    [14] The strip 7 leaving the strip casting equipment in thickness becomes larger and smaller in the direction in which the movement of the strip is in a homogeneous structure and can be used immediately thereafter or can be changed by additional formation such as hot rolling or cold rolling. Can be. At any rate, the homogeneous structure provided the strips with the desired optimum prerequisites for further processing.
    权利要求:
    Claims (9)
    [1" claim-type="Currently amended] The steel strip is formed by casting in two cold roll yarns with variable nips and through the cooling of the rollers acting on the molten steel cast into a gusset formed by the rollers. It is manufactured depending on the movement, and thus the thickness of the steel strip is varied for providing a change in the length of the steel sheet at a thickness of 10 to 40%. Steel strip manufacturing method.
    [2" claim-type="Currently amended] The method of claim 1,
    The cooling of the roller is done at the time of contact with molten steel.
    [3" claim-type="Currently amended] The method of claim 2,
    The contact time is controlled by the roll speed and / or the bath height of the molten metal.
    [4" claim-type="Currently amended] The method according to any one of claims 1 to 3,
    The cooling is achieved through heat flow between the roll and the melt instructor.
    [5" claim-type="Currently amended] The method of claim 4, wherein
    The heat flow is influenced by the surface structure of the roll and / or the inert gas atmosphere and / or the casting oil.
    [6" claim-type="Currently amended] The method according to any one of claims 1 to 5,
    The roll is operated with a constant bearing force
    [7" claim-type="Currently amended] The method according to any one of claims 1 to 6,
    And said cast strip is hot rolled from casting heating.
    [8" claim-type="Currently amended] The method according to any one of claims 1 to 7,
    The cast steel strip is cold rolled immediately after hot rolling and / or recrystallization annealing.
    [9" claim-type="Currently amended] The method according to claim 7 or 8,
    Hot rolling and / or cold rolling are carried out to a constant level of shape, if necessary after the previous recrystallization annealing.
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    同族专利:
    公开号 | 公开日
    AT216930T|2002-05-15|
    US6524408B1|2003-02-25|
    DE19840898C2|2000-06-29|
    ES2177315T3|2002-12-01|
    EP1109638A1|2001-06-27|
    CN1316929A|2001-10-10|
    WO2000013820A1|2000-03-16|
    JP2002524261A|2002-08-06|
    AU5625199A|2000-03-27|
    BR9913520A|2001-06-05|
    EP1109638B1|2002-05-02|
    DE19840898A1|2000-03-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-09-08|Priority to DE19840898.6
    1998-09-08|Priority to DE19840898A
    1999-08-27|Application filed by 추후제출, 티센 크루프 슈타알 악티엔게젤샤프트
    1999-08-27|Priority to PCT/EP1999/006303
    2001-08-09|Publication of KR20010074990A
    优先权:
    申请号 | 申请日 | 专利标题
    DE19840898.6|1998-09-08|
    DE19840898A|DE19840898C2|1998-09-08|1998-09-08|Process for producing load-optimized steel strips|
    PCT/EP1999/006303|WO2000013820A1|1998-09-08|1999-08-27|Method for producing load-optimised steel strips|
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