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In order to obtain higher yield strength in traditional hot rolling especially in the greater thicknesses, the addition of substantial amounts of alloying elements is necessary. However, these additions decrease weldability and toughness. Production costs are also increased to a hardly competitive level.
An appropriate alternative to achieve, in an economical way, high yield strength, good toughness and weldability is the quenching and self tempering (QST) treatment after the last rolling pass.
Part I of the QST project (1986-1989) aimed at the development of the SC (selective cooling) and QST processes for sections with a height up to 500 mm and a thickness up to 40 mm. Fabrication properties like flame cutting, welding, cold sawing, machining and drilling have also been investigated in that part of the project.
Part II of the QST project, which the present report is describing, started in July 1989 with the modifications of the test equipment necessary to treat beams of a height up to 1 100 mm and a flange thickness up to 140 mm. m.

Additional information

Authors: CHANTRAIN P, ARBED Recherches, Esch-sur-Alzette (FR);AXMANN G, ARBED Recherches, Esch-sur-Alzette (FR);DENGLER J, ARBED Recherches, Esch-sur-Alzette (FR);SEIL P, ARBED Recherches, Esch-sur-Alzette (FR)
Bibliographic Reference: EUR 15806 EN (1996) 309pp., FS, ECU 33
Availability: Available from the (2)
ISBN: ISBN 92-827-7197-0; ISSN
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