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Ettore Anelli

Antonio Mascanzoni

A process for the production of low carbon steel strips having a good combination of strength an formability, as cast, and a good weldability after the pickling by usual processes, comprising the following steps: casting, in a twin rolls continuous casting machine ( ) comprising pinch rolls ( ), a strip with a thickness comprised between 1 and 8 mm, having the following composition as weight percentage of the total weight: C 0.02-0.10; Mn 0.1-0.6; Si 0.02-0.35; Al 0.01-0.05; S<0.015; P<0.02; Cr 0.05-0.35; Ni 0.05-0.3; N 0.003-0.012; and, optionally, Ti<0.03; V<0.10; Nb<0.035, the remaining part being substantially Fe; cooling the strip in the area comprised between the casting-rolls and the pinch rolls ( ); hot deforming the strip cast through said pinch rolls ( ) at a temperature comprised between 1000 and 1300&deg; C. until reaching a thickness reduction less than 15%, in order to encourage the closing of the shrinkage porosites; cooling the strip at a speed comprised between 5 and 80&deg; C./s down to a temperature (Tavv) comprised between 500 and 850&deg; C.; and coiling into a reel ( ) the so obtainable strip.

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Rome, Italy

Ettore Anelli