公开(公告)号：US10655197B2

公开(公告)日：2020-05-19

申请号：US14888821

申请日：2014-04-04

Applicant: PRIMETALS TECHNOLOGIES AUSTRIA GMBH

Inventor： Rainer Burger ,  Robert Linsbod ,  Bernd Linzer ,  Josef Mikota ,  Axel Rimnac

IPC: C21D11/00 ,  C21D9/56 ,  C21D1/54 ,  C21D8/02 ,  C21D9/54

Abstract: A method for determining the ferrite phase fraction xa after heating or when cooling a steel strip (2) in a metallurgic system. Also, a device for carrying out the method. A method by which the ferrite phase fraction in the steel strip (2) can be determined online, quickly and easily, includes measuring a width w1 and a temperature T1 of the steel strip (2), wherein the steel strip (2) comprises a ferrite phase fraction xa 1 during the measurements; heating or cooling the steel strip (2); when heating the steel strip (2) a phase conversion at least in part occurs, a→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 (2) converted at least in part; determining the ferrite phase fraction of the formula (I), wherein T0 is a reference temperature and aa and ay are the linear heat expansion coefficients of ferrite and austenite.

公开(公告)号：US10081041B2

公开(公告)日：2018-09-25

申请号：US14651411

申请日：2013-11-25

Applicant: PRIMETALS TECHNOLOGIES AUSTRIA GMBH

Inventor： Rainer Burger ,  Ansgar Grüss ,  Helmut Hlobil ,  Peter Hunt ,  Robert Linsbod

IPC: G01N3/20 ,  B21B38/02 ,  G01B11/24 ,  B21C51/00 ,  G01B11/30 ,  G01B21/20 ,  G01B11/16 ,  B21B3/00

CPC classification number: B21B38/02 ,  B21B2003/001 ,  B21B2261/06 ,  B21C51/00 ,  G01B11/16 ,  G01B11/24 ,  G01B11/306 ,  G01B21/20 ,  G01N3/20

Abstract: A method and apparatus for flatness measuring and measuring of residual stresses in a metallic flat product (1): The method includes bending the flat product (1) in a bending device (3) such that a planar flat product (1) forms an arc (5) with a target bending radius r0 after bending; measuring the contour and the actual bending radii r(y), in the region of the arc (5) of the bent flat product (1) at a plurality of positions along the width direction of the flat product (1); and determining the flatness of the flat product (1) taking into account the measured contour of the bent flat product (1).