Abstract:
Hollows, preferably hollows, each having an average depth of 40-200 mu m and a circle-equivalent diameter of 0.5-3 mm, are formed on the peripheral surface of a cooling drum, the hollows being formed adjacent to one another via the tops of the hollows; and on/in the tops and /or the surfaces of the hollows are formed minute projections (preferably, minute projections 1-50 mu m in height and 5-200 mu m in circle-equivalent diameter on the surfaces of the hollows, and those 1- 50 mu m in height and 30-200 mu m in circle-equivalent diameter on the tops of the hollows), and small holes (preferably, small holes at least 5 mu m in depth and 10-200 mu m in circle-equivalent diameter) or minute irregularities (preferably, minute irregularities 1-50 mu m in average depth and 10-200 mu m in circle-equivalent diameter).
Abstract:
A system for continuously cooling a metal strip which comprises at least one cooling roll rotatable and in contact with the metal strip, for cooling the metal strip continuously moving in the lengthwise direction thereof, said cooling roll allowing a cooling liquid to flow therethrough for continuously cooling said cooling roll, and a contact area between the surface of said cooling roll and the surface of the metal strip being controllable; a gas cooling machine disposed at the outlet of said cooling roll, for continuously cooling the metal strip by blowing the cooling gas onto the metal strip in such a manner that the distribution of temperature in the direction of a plate width of the metal strip is kept uniform after the final cooling, said gas cooling machine including a plurality of nozzle headers being independent of one another, for blowing the cooling gas onto the metal strip, and said plurality of nozzle headers controlling at least one of the flowrate and the flow velocity of the cooling gas in the direction of the plate width of the metal strip; a first tension adjusting machine disposed at the inlet of the said cooling roll; and a second tension adjusting machine disposed at the outlet of the gas cooling machine.
Abstract:
1. Bezeichnung. Flexible Wärmebehandlungsanlage für metallisches Band in horizontaler Bauweise. 2. Kurzfassung 2.1 Beim Durchlaufglühen und beim Feuerverzinken werden bei AI-beruhigten Tiefziehund bei TRIP-Stählen zur Erzielung bestmöglicher Eigenschaften in-line Wärmenachbehandlungen mit verhältnismäßig langen Behandlungszeiten durchgeführt. Damit ist jedoch ein gravierender Nachteil verbunden, weil die Bedingungen für eine optimale Herstellung von IF- und von Dualphasenstählen bezüglich ihrer Eigenschaften und Wirtschaftlichkeit verschlechtert werden. Die Erfindung soll es ermöglichen, in einer horizontalen Wärmenachbehandlungseinheit die Behandlungszeiten gezielt an die Erfordernisse des jeweils behandelten Stahltyps anzupassen. 2.2 Die Lösung der gestellten Aufgabe ist eine Vorrichtung in einer Wärmenachbehandlungskammer (1) einer Band-Durchlaufanlage. Dabei ist eine Tragkonstruktion (2) so ausgelegt, dass sich in ihr eine vordere Rollen-Anordnung auf mindestens einem Schlingenwagen (3) horizontal nach vorne oder hinten bewegen lässt. Im Zusammenwirken mit einer hinteren festen Rollenanordnung (4) kann ein Band in Schleifen durch die Behandlungskammer geführt werden, wobei durch Verfahren der vorderen Anordnung nach vorne oder hinten unterschiedliche Schleifenlängen und damit Behandlungszeiten erzielt werden. 2.3 Die Erfindung ermöglicht es, dass beim Durchlaufen von Band in einer flexiblen Wärmenachbehandlungszone mit horizontaler Anordnung die Durchlaufzeiten optimal an die Erfordernisse des jeweils behandelten Stahltyps angepasst werden.
Abstract:
The invention relates to a method for cooling a continuously-moving metal strip (2), whereby the strip (2) is applied to a main cooling roller (10) such that said strip forms an arc, the inner curve of which defines a zone of contact with the external face of said roller, for removal of a part of the heat in the strip towards the interior of the roller, the strip (2) being held in contact with the main cooling roller (10) by means of a pressure roller (14), acting on the outer curve of the strip which is made from an elastically-deformable and thermocapacitive medium and the heat transmitted from the strip (2) to the pressure roller (14) is removed by secondary cooling means (16).
Abstract:
Pour refroidir une bande métallique (2) en défilement continu : - on applique la bande (2) sur un rouleau de refroidissement principal (10) de façon à ce que la bande forme un arc dont l'intrados délimite avec la face extérieure de ce rouleau une zone de contact adaptée pour évacuer vers l'intérieur du rouleau une partie de la chaleur de la bande, - on maintient la bande (2) en contact avec le rouleau de refroidissement principal (10) au moyen d'un rouleau (14) d'appui sur l'extrados de la bande, constitué d'une matière élastiquement déformable et thermo-capacitive, et - on évacue la chaleur transmise de la bande (2) au rouleau d'appui (14) par l'intermédiaire de moyens (16) de refroidissement secondaire.
Abstract:
Method of processing a strip following a strip path by heating or cooling wherein the strip is brought into contact with a roller wherein the roller comprises a heat pipe, wherein the roller simultaneously heats a first strip and cools a second strip, characterised in that the dimensions of the roller and the lay-out of the strip paths are chosen such that the footprint of the first strip on the roller and the footprint of the second strip on the roller do not overlap.
Abstract:
The present invention relates to a method of cooling strip or wire products in which, subsequent to being annealed, the product (3) is cooled to a temperature of about 20-50°C beneath its oxidation temperature. The invention is characterised by winding the product (3) around a drum (1) immediately downstream of an annealing path so that the product (3) is brought to lie in mutually juxtaposed turns and thereafter to be unwound from the drum (1) after a number of turns, wherein the product is wound onto the drum (1) through a number of turns such that said product (3) will be cooled to a desired temperature, and wherein the drum (1) is given a diameter that exceeds the diameter at which the product (3) will be influenced mechanically by plastic deformation.
Abstract:
A metal band cooling apparatus in a roll cooling machine on a heat treatment line, and a cooling method therefor. The basic characteristics of this invention reside in a roll cooling apparatus for regulating the contact length of a metal band with not less than one cooling roll by winding the metal band around the cooling rolls, the apparatus having a gas cooling unit disposed in an opposed state with respect to the cooling rolls via the metal band, and provided with not less than two nozzle headers extending in the lengthwise direction of the rolls, having a width smaller than that of the metal band and formed so that these nozzle headers can be moved in the moving direction of the cooling rolls and so that at least one of the nozzle headers can be moved in the lengthwise direction of the cooling rolls; and a gas regulating unit for regulating the pressure or flow rate of a cooling gas in the nozzle headers. By utilizing this structure, the narrow nozzle headers of the gas cooling unit is moved to a position just above a hot point of a narrow W-type ununiform temperature distribution, and a cooling gas the pressure or flow rate of which has been regulated by the gas regulating unit is blown out toward the hot point, whereby the mentioned part is cooled in a concentrated manner to efficiently eliminate ununiform temperature distribution.
Abstract:
急冷焼入れ時に金属板に発生する形状不良を効果的に抑制可能な金属板の製造方法および急冷焼入れ装置を提供する。本発明に係る金属板の製造方法は、金属板のMs点の温度をT Ms (℃)、Mf点の温度をT Mf (℃)とすると、急冷焼入れ中の金属板を、金属板の温度が(T Ms +150)(℃)から(T Mf -150)(℃)である範囲において、一対の拘束ロールにより拘束する。