Primetals Technologies Austria Gmbh

Primetals Technologies Germany Gmbh

Umicore

Robert Linsbod

Rainer Burger

Ansgar Grüss

Bernd Linzer

Axel Rimnac

Josef Mikota

Andreas Jungbauer

Helmut Hlobil

Peter Hunt

A method for determining the ferrite phase fraction xafter heating or when cooling a steel strip () in a metallurgic system. Also, a device for carrying out the method. A method by which the ferrite phase fraction in the steel strip () can be determined online, quickly and easily, includes measuring a width wand a temperature Tof the steel strip (), wherein the steel strip () comprises a ferrite phase fraction xduring the measurements; heating or cooling the steel strip (); when heating the steel strip () a phase conversion at least in part occurs, a&#x2192;y from the ferrite state a into the austenitic state y and when cooling the steel strip a phase conversion at least in part occurs, from the austenitic state y into the ferrite state a; measuring of a width w and a temperature T of steel strip () converted at least in part; determining the ferrite phase fraction of the formula (I), wherein Tis a reference temperature and aand aare the linear heat expansion coefficients of ferrite and austenite.

Determining the ferrite phase fraction after heating or cooling of a steel strip

A method and apparatus for flatness measuring and measuring of residual stresses in a metallic flat product (): The method includes bending the flat product () in a bending device () such that a planar flat product () forms an arc () with a target bending radius rafter bending; measuring the contour and the actual bending radii r(y), in the region of the arc () of the bent flat product () at a plurality of positions along the width direction of the flat product (); and determining the flatness of the flat product () taking into account the measured contour of the bent flat product ().

Flatness measuring and measuring of residual stresses for a metallic flat product

A method for altering the width of a strip-shaped rolled material (), before, during or after hot rolling the rolled material in a hot rolling mill. The problem is to specify a method for altering width so that the length of a rolled out transition piece lying outside width tolerances can be reduced. Scrap losses are to be reduced. The crown of at least one working roll and/or at least one backing roll of a stand () is set as a function of a width error e=B&#x2212;B between a setpoint width Band the width B of the rolled material (), wherein the crown is increased when e&#x3e;0 and the crown is reduced when e&#x3c;0. AA RBB B.

Width-altering system for strip-shaped rolling rock

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Linz, Austria

Robert Linsbod