公开(公告)号：US11724299B2

公开(公告)日：2023-08-15

申请号：US16958175

申请日：2018-12-21

申请人： Sandvik Intellectual Property AB

发明人： Fernando Rave ,  Krister Wickman ,  Thomas Froböse

IPC分类号： B21D3/12 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/26 ,  C21D9/08 ,  C21D8/10 ,  C21D6/00 ,  C22C38/22 ,  C21D1/34

CPC分类号： B21D3/12 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/105 ,  C21D9/08 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C21D1/34

摘要： The present disclosure relates to a method for straightening of a tube comprising a ferritic FeCrAl-alloy. One reason for the challenges regarding the cold working of a hollow of a ferritic FeCrAl-alloy into a finished tube is that FeCrAl-alloys have a low ductility. Even if a tube of a FeCrAl-alloy is obtained by cold working a hollow into a tube, the tube can hardly be straightened. This is even more a problem if a tube obtained is annealed, wherein the annealing leads to a deformation of tube along the longitudinal direction of the tube. Therefore, there is a need for a method for straightening of a tube comprising a ferritic FeCrAl-alloy. Thus, according to the present disclosure a method for straightening of a tube is suggested, wherein the method comprises the steps of providing a tube comprising a ferritic FeCrAl-alloy, heating the tube, and straightening and forming the heated tube by stretching.