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The effects of varying the heating rate during the annealing of sheet steel has been investigated, using a variety of types of sheet steel, to determine whether any process advantages or metallurgical benefits could be gained from being able to heat to an annealing temperature in a few seconds or less, compared with existing methods involving heating times of about 30 seconds. In each laboratory the range of heating rate covered was up to 30000C/s. Faster heating rates appeared to have little effect on the recrystallised grain size obtained, with the exception of micro-alloyed steel, and preliminary shape studies confirmed that very fast heating could lead to bowing. At present there is therefore little incentive to give priority to the development of more rapid heating methods.

Additional information

Authors: HUDD R C, Britsh Steel plc;LYONS L K, CRM;DE PAEPE A, CRM;STOLZ C, CRM;COLLINS J, EA Technology
Bibliographic Reference: EUR 18562 EN (1998) 175pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4905-8
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