Abstract: An improvement in a process for preparing a structural steel having a maximum carbon content of 0.26 weight percent, the balance comprising iron, wherein the steel is continuously heated with the use of rapid heating, followed by quenching, the improvement comprising heating the steel only in its shell to a temperature between A.sub.cl and 1,300.degree.C such that the core heats up at an average rate of at least 100.degree.C/sec. up to a temperature between incipient pearlite transformation (A.sub.cl) and 900.degree.C, and thereafter, but prior to the attainment of equilibrium with respect to the carbon content, quenching said steel.
Type:
Grant
Filed:
May 11, 1972
Date of Patent:
January 20, 1976
Assignee:
Bau-Stahlgewebe GmbH
Inventors:
Ludwig Ettenreich, Otto Reimann, Klaus Greulich