An emulsion flow optimization method suitable for a cold continuous rolling mill that aims to achieve vibration suppression. Said method aims to suppress vibrations, and by means of an oil film thickness model and a friction coefficient model, an optimum set value of the emulsion flow rate for each rolling stand that aims to achieve vibration suppression is optimized on the basis of an over-lubrication film thickness critical value and an under-lubrication film thickness critical value that are proposed. The described method greatly reduces the incidence of rolling mill vibration defects, improves production efficiency and product quality, treats rolling mill vibration defects, and improves the surface quality and rolling process stability of a finished strip of a cold continuous rolling mill.

A handling line that includes a valve in a feed line that sets the valve to a respective opening position (s) for adjusting a coolant flow (F) to a metal strip per unit of time; an upstream condition detection device upstream of the valve device in the feed line that detects an upstream condition (ZV) of the coolant; a control unit that determines a set point (s*) for an opening position (s) of the valve device corresponding to the set point (F*) for the coolant flow (F) based on a set point (F*) for the coolant flow (F*), the upstream condition (ZV) of the coolant and a valve characteristic (C) of the valve device.

A process for cooling a metal substrate running in a longitudinal direction, said process including ejecting at least one first cooling fluid jet on a first surface of said substrate and at least one second cooling fluid jet on a second surface of said substrate, said first and second cooling fluid jets being ejected at a cooling fluid velocity higher than or equal to 5 m/s, so as to form on said first surface and on said second surface a first laminar cooling fluid flow and a second laminar flow respectively, said first and second laminar cooling fluid flows being tangential to the substrate, said first and second laminar cooling fluid flows extending over a first predetermined length and a second predetermined length of the substrate respectively, said first and second lengths being determined so that the substrate is cooled from a first temperature to a second temperature by nucleate boiling.

A X80 pipeline steel with good strain-aging performance comprises (wt. %): C: 0.02-0.05%; Mn: 1.30-1.70%; Ni: 0.35-0.60%: Ti: 0.005-0.020%; Nb: 0.06-0.09%; Si: 0.10-0.30%; Al: 0.01-0.04%; N≤0.008%; P≤0.012%; S≤0.006%; Ca: 0.001-0.003%, and balance iron and unavoidable impurities.

Provided is a strip edge detection device that can precisely detect an edge of a strip, and that can reduce maintenance labor; and also provided is a brushing apparatus comprising the same.

An edge detection device 7 reciprocates in a width direction of a strip 2, together with brush rolls 3, to detect an edge of the strip 2 in the width direction. The edge detection device 7 comprises a light-emitting portion 8 for emitting light from one side of the front and back surfaces of the strip 2 to the other side; a light-receiving portion 9 for receiving light emitted from the light-emitting portion 8, the light-receiving portion 9 being placed on the opposite side of the light-emitting portion 8 with respect to the strip 2; multiple covers 100 individually covering the light-emitting portion 8 and the light-receiving portion 9; an air injection means 11 for continuously injecting air to the light-emitting portion 8 or the light-receiving portion 9, the air injection means 11 being provided in each cover 100; and a water injection means 12 for injecting water to the light-emitting portion 8 or the light-receiving portion 9 at a predetermined timing, the water injection means 12 being provided in each cover 100.

A cooling section for flat rolling stock has a working region, through which the flat rolling stock is guided. The working region can be supplied with a liquid coolant by means of a number of spray beams. The liquid coolant is fed from a reservoir for the liquid coolant to the spray beams by means of a pump and a supply system. Valves are arranged upstream of the spray beams in the supply system. Opening positions of the valves are set by a control unit of the cooling section according to a respective sub-flow that is to be applied to the flat rolling stock by means of each spray beam. Also, the delivery rate of the pump and/or a line pressure generated by the pump in the supply system are set by the control unit according to the total flow that is to be applied to the flat rolling stock by means of all the spray beams.

A flat rolled metal product (1) is first hot-rolled in at least one rolling stand (2), then fed to a cooling zone (5) arranged downstream of the rolling stand (2) and finally cooled in the cooling zone (5). During the rolling in the rolling stand (2), the flat rolled product (1) is oriented horizontally. Before running into the cooling zone (5) and/or when running into the cooling zone (5), the flat rolled product (1) is turned by a first acute angle (a) about an axis running in the transporting direction (x), so that after completion of the turning about the axis the flat rolled product (1) is oriented obliquely. The flat rolled product (1) is cooled in the cooling zone (5) while it is oriented obliquely. The product (1) is then returned to horizontal orientation.

A cooling system (2) for cooling metal rolling stock. A plurality of cooling bars (8) for applying a coolant onto the rolling stock, one dedicated coolant supply line (36) for each cooling bar (8), and a feed system (9) for guiding the coolant to the coolant supply lines (36). Each cooling bar (8) is connected to the feed system (9) via a dedicated coolant supply line (36). A bypass line (48, 52) for discharging a coolant flow from the feed system (9), is connected on the input side to a connection element (51, 53) of the feed system (9).

A rolling mill exit side temperature control system includes the following features. A second valve control unit controls a valve opening of a second valve to cause a flow rate actual value detected by a flow rate detector to coincide with a flow rate target value. A remaining coolant discharging section controls a first valve to an open state and the second valve to a closed state by setting the flow rate target value to zero, before a material to be rolled reaches a rolling mill. A flow rate target value setting section sets the flow rate target value to a value corresponding to a target temperature of the material to be rolled on the entry side and the exit side of the rolling mill after the control by the remaining coolant discharging section.

A uniform temperature roller system for uniform temperature exchange by supercritical fluid is revealed. The system includes a roller body, a pair of rotary shafts, a plurality of heating/cooling modules and a supercritical fluid. The roller body includes a first chamber, a second chamber and a third chamber. The second chamber is a closed space and the two rotary shafts are formed on two lateral plates of a housing of the roller body correspondingly. The heating/cooling modules are mounted in the second chamber and the supercritical fluid is filled in the second chamber for transferring temperature between the heating/cooling modules and the roller shell. Thereby the uniform temperature roller system achieves heating or cooling quickly with uniform heat exchange so as to improve quality and yield rate of the product as well as extend service life of the roller.