Sms Schloemann-siemag Aktiengesellschaft

Sms Demag Ag

Sms Meer Gmbh

Sms Siemag Aktiengesellschaft

Meinert Meyer

Uwe Plociennik

Klaus K&uuml;ppers

Hans-Georg Hartung

Manfred Albedyhl

Thomas Nerzak

Wolfgang Roloff

Rainer Kohlmann

Karl Keller

Martin Braun

Friedrich Wilhelm Hollmann

Ludwig Weingarten

R&uuml;diger Grimmel

Gunter Grenz

Rolf Stodt

Werner Kohlstedde

Paul-Josef Mauk

Bruno B&ouml;hmer

Andreas Peters

Klaus Kuppers

Egon Sippel

Klaus Küeppers

Heinz-Jurgen Oudehinken

Klaus Küppers

Georg Rebel

A system for cooling a hot rail of rail steel to a fine perlitic or ferritic or perlitic/ferritic structure has a plurality of separate cooling modules with independently adjustable cooling parameters. The rail is guided downstream through the modules of the cooling stretch and through intermediate zones between the modules so as to cool the surface of the rail in each of the modules and to subject the rail to destressing or stress relief between the modules. Sensors in each of the intermediate zones detect the actual surface temperature of the rail in the respective zones, and a controller connected to the modules and to the sensors varies the cooling parameters of the cooling modules in dependence on the detected temperatures in the respective upstream zones to ensure a defined temperature in the rail that lies above a critical temperature at which bainitic structure components are formed.

System for cooling shape-rolled rails

The invention relates to a method of releasing a reel awe, which is hydraulically restrained by a self-locking effect by means of inwardly located wedge surfaces of expansion elements. Removal of a coil from a reel awe is achieved, without problems, by lifting off the self-locking effect of the expansion elements at least partially or completely by applying longitudinal vibrations acting in an axial direction. The invention also relates to a correspondingly formed device.

Method of and device for reducing the static friction between a reel and a coil

In order to obtain a fine-lamellar perlite structure in the edge region of the heads of rails (), especially hot-rolled rails for carriageways or railways, by specific thermal treatment during cooling from the rolling heat without the formation of bainite, precooling () occurs in order to achieve a core temperature of approximately 750-850&#xb0; C., and the temperature of the more intensively cooled edge region is raised by intermediate heating () to at least said core temperature and finally cooled ().

Method and system for thermal treatment of rails

A method of cooling on a cooling bed hot-rolled steel sections from rolling heat, wherein the sections, particularly rails, have section parts of different masses arranged at a distance from each other over the cross-section of the section, and an apparatus for carrying out the method. Initially, the heat quantities to be proportionally removed from the different section parts in dependence on their mass and temperature and the quantity of cooling medium required for this removal are determined and computed by using measuring equipment together with a computing unit by means of a computer program. Subsequently, cooling of the different section parts or their masses is carried out in a controlled manner in such a way that the section parts reach with as little time delay as possible the transformation line A /A during the decomposition of the gamma-mixed crystal into ferrite and/or pearlite while releasing the transformation heat.

Method and apparatus for cooling hot-rolled sections

A method of heat treatment of wire including cooling the wire stock immediately after the stock leaves the rolling heat region to a temperature below the starting temperature of martensite formation and, thereafter, forming wire coils.

Method of heat treatment of wire

A water cooling device for a controlled cooling of wire, small sections, and ribbed concrete wire guided along a wire rod guiding line out of the rolling heat has a support frame that is parallel-slidable or rotatable. Parallel, adjacently arranged cooling water pipelines are provided each having a different inner diameter and mounted on the support frame. Each cooling water pipeline has arranged thereat water boxes. The cooling water pipelines have cooling water pipes having an inner pipe diameter matching the inner diameter of the correlated cooling water pipeline. The cooling water pipes are arranged in the water boxes. Each cooling water pipeline has guide grooves positioned between the water boxes for connecting the cooling water pipes of each cooling water pipeline with one another. The cooling water pipelines are configured such that, by parallel-sliding or rotation of the support frame in a direction perpendicular to the wire rod guiding line, each cooling water pipeline is positionable in the wire rod guiding line so that the wire rod is guidable in all of the cooling wire pipes.

Water cooling device for wire

A method of measuring and regulating temperature and quantity of cooling water of a continuous casting mold flowing through water-coolable mold walls composed of copper plates, particularly mold walls which are independent of each other, wherein the cooling water temperature of a mold wall is measured at at least two locations in the area of the discharge openings of a copper plate and the corresponding water box. The flow velocity and the water pressure of the cooling system are adjusted in such a way that the lowest temperature in the area of the water discharge side or the water discharge opening of a copper plate is at the limit of the boiling temperature, and that for all higher temperatures a bubble evaporation at subcooled boiling of the cooling water is stimulated.

Method of measuring and regulating temperature and quantity of cooling water for water-coolable mold walls of a continuous casting mold

In a heat treatment method for producing boundary layer-hardened long products and flat products of unalloyed or low-alloy steel, the workpiece is cooled for producing a martensitic grain within a boundary layer of the workpiece by repeating several sequential cooling process steps. Each sequential cooling process step has a cooling phase, in which the workpiece is cooled to a temperature below a martensite starting temperature for martensitic conversion of only a portion of the boundary layer of the workpiece, and a temporal stress-relief phase for relieving stress within already formed martensitic grain areas and already formed martensite/austenite boundary areas. Subsequently, the workpiece is cooled at a cooling rate below a lower critical cooling rate for cooling the workpiece core.

Heat treatment method for producing boundary-layer hardened long products and flat products of unalloyed or low-alloy steel

A method and apparatus for cooling hot-rolled rolling stock, wherein, for cooling preferably both sides of hot-rolled wide strip, a heat exchange is carried out between the rolling stock and the cooling medium by a pressurized water flow through a sequence of a pressure chamber and a convection chamber, and wherein the rolling stock is cooled by a targeted control of the intensity of the forced convection. The method utilizes a combination of a cooling unit between stands and an additional roll cooling unit in the area of the roll gap at the exit side thereof using a directed pressurized water flow along a circumferential portion of the roll body of each work roll, wherein the cooling unit between stands and the roll cooling unit each operate with contactless sealing means for the surface of the rolling stock and the surface of the roll body.

Method and apparatus for cooling hot-rolled rolling stock, particularly

A laying tube for producing wire windings from continuously introduced essentially straight wire material includes a first portion of an outer casing which is driven so as to rotate and receives a feeding tube for the wire material. Connected to the first portion is an outwardly expanding portion of the outer casing which includes a curved wire guide channel, wherein this guide channel is provided in the form of a groove in the outer surface of a hollow insert which is placed with fit in the expanding portion of the outer casing, and wherein the centrifugal forces of the wire are absorbed by the inner surface of the outer casing. The feeding tube and the insert form a structural unit which is releasably connected to the outer casing. This structural unit and, thus, the impact surfaces of the centrifugal forces of the wire can be moved in dependence on the localized wear of the inner surface of the outwardly expanding portion of the outer casing and relative thereto by a rotary movement about the longitudinal axis to an area which has not yet been worn out.

Laying tube for windings

A method of cooling section steel, particularly sectional steel girders, from rolling heat, wherein, prior to a final air cooling, a water cooling process is carried out in such a way that section steel portions with material concentrations are cooled at outwardly projecting portions of the steel sections over a width of application and a duration of application which are variable and subject to a predetermined cooling strategy supported by a process computer to a value which is at least still slightly above the transformation temperature Ar1.

Method of cooling sectional girders

A method of coiling steel rod arriving continuously comprises the steps of rotating about an upright axis a coiling basket defining a space centered on the axis and defined by an annular inner wall, an annular outer wall, and a floor between the walls, and feeding the rod into the space to form a coil resting on the floor and formed by a multiplicity of turns. The coil is, once formed, raised out of the space and simultaneously axially compacted and is also stabilized. More particularly the coil is stabilized by spraying an outer surface of the coil with a coolant while raising the coil out of the space. Normally the coil is rotated about the axis as the coil outer surface is being sprayed.

Coiling steel rod

A method of coiling or placing bar steel or wire in coils, wherein the rolling stock is reeled from rolling heat in a basket or is placed by a coiler in the form of coils onto a conveyor and is collected at the end of the conveyor over a mandrel into a coil, wherein the rolling stock is cooled during coiling and the rolling stock is further cooled after the coiling process or the formation of coils. Cooling of the rolling stock from rolling heat prior to coiling into the transformation range characterized by the Ar.sub.3 line or Ar.sub.1 line of the transformation time-temperature diagram corresponding to the type of steel to be cooled is extended, such that, depending on the type of steel, the rolling stock is transformed immediately after cooling prior to, during or after coiling, uniformly over the entire length and entire cross-section thereof essentially isothermally from the austenite phase into the ferrite phase or pearlite phase and, as required, into the bainite phase.

Ferritic coiling of wire or bar steel

A method of cooling steel sections which are hot from rolling by means of shock-like cooling following the rolling process so as to form a martensitic surface layer, and by subsequently autogenously tempering this surface layer by means of core heat to obtain a tough-resistant structure with an austenitic remaining cross-section, wherein the method is used in connection with types of steel which, with uncontrolled cooling in air, would directly transform from the austenitic phase into martensite because of their alloying elements from the group Cr, Mn, Mo, Ni and other suitable elements.

Method of cooling steel sections which are hot from rolling

A method for cooling of profiled rolled material hot rolled in roll stands, especially rails on a cooling bed by natural convection or by forced air cooling, which includes conveying the rails across the cooling bed with the rail heads oriented downwards. The apparatus for effecting the method includes a cooling bed having support elements which support the rails in a suspended state with the rail heads oriented downwards.

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Erkrath, Germany

Meinert Meyer