Centre De Recherches Metallurgiques

Jean Claude Herman

Annick De Paepe

St&eacute;phan Wilmotte

A method for making a low carbon and low manganese cold rolled steel strip for deep-drawing whereby a steel strip hot rolled in the austenistic region coiled at the end of the high temperature hot rolling process (680&deg; C.<T<750&deg; C.) is subjected to a cold rolling process with a reduction rate between 65 and 80 %, and finally subjected to an annealing and overageing heat treatment. The method consists in heating the steel strip at a heating rate Vh ranging between 150&deg; C./s and 1000&deg; C. up to the annealing temperature Ta ranging between 650&deg; C. and 750&deg; C., and in maintaining it at said annealing temperature for a time interval between 1 and 20 seconds, then in cooling it at cooling rate Vc between 100&deg; C./s and 500&deg; C./s up to an overageing temperature Toa ranging between 150&deg; C. and 450&deg; C.

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Blégny-Trembleur, Belgium

Jean Claude Herman