Abstract:
本発明は、鋼板を、鋼板面を複数組の上下ロールで拘束しながら水平に搬送する工程と、搬送中の鋼板を鋼板面の上下方向から水冷する工程とを有し、1組当りの上下ロールによる鋼板の拘束力(t)がP1(=6.85×10 -7 S 3 L 0.65 )以上P2(=1.2×10 -6 S 3 L 0.65 )未満である、鋼板の冷却方法を提供する。ここで、L(mm)は隣り合う上下ロール組間の距離、S(mm)は鋼板の厚みを表す。本発明の方法により、冷却ムラによる反りや拘束力による挫屈が生じることなく熱間圧延された鋼板を均一冷却できる。
Abstract translation:一种冷却钢板的方法,包括以下步骤:当钢板的表面被多组上下辊阻挡时水平地输送钢板,并且在从表面的上下方向输送期间对钢板进行水冷却 的钢板,其中,通过上下辊的钢板止动力(t)为P1(= 6.85×10 -7 S <0.65),小于P2(= 1.2 其中L(mm)是彼此相邻的上下辊的组之间的距离,S(mm)是钢板的厚度,其中, 可以均匀地冷却热轧钢板,而不会由于滞后力的不均匀的冷却和翘曲而产生翘曲。
Abstract:
Cooling jets for moving webs such as continuously annealing steel strip can be deflected to aim at the edge of the web, and thereby stabilise it as it passes between. Flutter of the web is thereby reduced. The offset is between 2 DEG and 15 DEG , alternatively 25-75% of the divergence angle of gas leaving the jet.
Abstract:
Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip of no more than 5 mm thickness having austenite grains that are coarse grains of 100-300 micron width; and providing desired yield strength in the cast strip by cooling the strip to transform the austenite grains to ferrite in a temperature range between 850 DEG C and 400 DEG C at a selected cooling rate of at least 0.01 DEG C/sec to produce a microstructure that provides a strip having a yield strength of at least 200 MPa. The low carbon steel produced desired microstructure.
Abstract:
The invention concerns an installation for controlling the sealed condition of water-gas heat exchangers equipping an industrial furnace (1), said furnace (1) comprising at least as assembly formed by means (9, 10, 11, 9', 10', 11') extracting a hot gas present in a specific zone of said furnace (1), a water-gas heat exchanger (12, 12') designed to cool the hot gas and means (14, 15, 14', 15') for reintroducing said hot gas which has been cooled into a zone of said furnace (1) located downstream of said zone where said hot gas is extracted. The invention is characterised in that it comprises: means (16, 16', 22 31) for sampling said hot gas at points (A, A') each located upstream of an exchanger (12, 12') and two-way valves (18-21, 18'-21') enabling said sampling; means (17, 17', 27, 32) for sampling said hot gas which has been cooled at points (B, B') each located downstream of an exchanger (12, 12') and two-way valves (23-26, 23'-26') enabling said sampling; means (36, 42) for regulating the respective pressure levels of said hot gas and the hot gas which has been cooled downstream of said sampling means (16, 16', 22, 31, 17, 17', 27, 32); means, such as a three-way valve (45) and its outlet pipe (46), for selecting said hot gas or said hot gas which has been cooled and sending it into an hygrometer (49); and means (50) for restoring to the operator the results of the analyses carried out by the hygrometer (49) enabling him to compare the degree of humidity of said hot gas and said hot gas which has been cooled for each of the exchangers (12, 12').
Abstract:
The invention relates to a method and a device for cooling a hot rolled steel strip (1, 30, 40, 50) that runs off a roll stand (2). Cooling is carried out by means of a cooling device (3, 4, 5, 6, 7, 8, 9, 10) and at least two temperature measuring devices (20, 21, 33, 34, 35, 41, 42, 51, 52, 53) that are arranged in the longitudinal direction of the steel strip (1, 30, 40, 50). The cooling devices (3, 4, 5, 6, 7, 8, 9, 10) are controlled according to the measured values of the at least two temperature measuring devices (20, 21, 33, 34, 35, 41, 42, 51, 52, 53).
Abstract:
The invention concerns a method for making a continuous steel strip, which consists in: dipping the steel strip, at a temperature ranging between 700 DEG C and 850 DEG C, in an aqueous bath maintained at a temperature above room temperature; adding to the aqueous bath at least a surfactant capable of lowering the surface tension of said aqueous bath by at least 20 dynes/cm; adding said surfactant in a proportion ranging between 0.5 g/l and 50 g/l and thereby lowering the aqueous bath surface tension to a value less than 30 dynes/cm. The temperature of the bath can be substantially its boiling point. Preferably, surfactants capable of resisting to temperatures above 110 DEG C, to pressure levels of at least 2 bar, and optionally to organic acids added to the bath are used, when making a non-oxidised strip.
Abstract:
A rolling mill (1) for rolling metal strip has provision for applying discrete levels of liquid coolant to the strip and the temperature (te) of the strip leaving the mill is compared with a target temperature (ts) and the temperature (Te) of the incoming workpiece is compared with a target temperature (Ts). The difference signals are employed to control the levels of liquid coolant and the rolling speed so that the exit temperature remains substantially equal to the target exit temperature.
Abstract:
본 발명에 따른 강판 냉각 장치는 강판의 이송경로에 구비되는 장치몸체;와, 상기 장치몸체에 구비되어 상기 강판을 향하는 방향으로 유체를 공급하는 냉각유닛; 및 상기 장치몸체에 구비되며, 상기 강판 방향과는 다른 방향으로 상기 유체에 인력을 제공하여 상기 냉각유닛에서 공급한 유체의 방향을 전환하는 방향전환유닛;을 포함할 수 있다.
Abstract:
Die Erfindung betrifft eine Durchlaufkühlvorrichtung (3) zum Abkühlen eines Metallbandes (1 ), insbesondere eines Metallbandes aus Aluminium oder einer Aluminiumlegierung, mit zumindest einem Bandschwebekühler (4), der mehrere entlang der Bandlaufrichtung (B) verteilte obere Düsen (5) und mehrere entlang der Bandlaufrichtung (B) verteilte untere Düsen (6) aufweist, wobei das Metallband (1 ) schwebend zwischen den oberen Düsen (5) und den unteren Düsen (6) transportierbar und dabei sowohl die Bandoberseite als auch die Bandunterseite mit Kühlluft beaufschlagbar ist, und mit mehreren Wasserkühleinheiten (7), mit welchen das Metallband (1 ) mit Kühlwasser beaufschlagbar ist. Diese Vorrichtung ist dadurch gekennzeichnet, dass die Wasserkühleinheiten (7) in den Bandschwebekühler (4) integriert sind.
Abstract:
The present invention relates to an annealing furnace (1) for annealing a strand (2) of steel comprising a first heating apparatus (9) for heating the strand (2) during the operation of the annealing furnace (1), comprising a transport device (4, 5, 6, 7) for the strand (2), which is designed to advance the strand (2) in a direction of transport (3) through the annealing furnace (1) during the operation of the annealing furnace (1). The annealing furnace (1) further comprises a first cooling device (13) for cooling the outer surface (17) of the strand (2) with a gas guide (16) in the direction of transport (3) behind the first heater (9), wherein the gas guide (16) is arranged in such a manner that a gas flows along the outer surface (17) of the strand (2) during the operation of the annealing furnace (1) for cooling the strand (2).