Patents Assigned to Sogerail
  • Process for heat treatment of a steel rail
    Patent number: 5714020
    Abstract: A process for the heat treatment of a steel rail having a head, a web and a flange. The rail is preheated, overheated and cooled. The process applies to steel in general, as well.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: February 3, 1998
    Assignee: Sogerail
    Inventor: Jean Luc Perrin