A Laboratory Investigation of the Processing Behaviour and Properties of Niobium Bearing E.D.D. Steels,

摘要

A laboratory investigation of the processing behavior and properties that may be obtained in cold rolled and annealed,very low carbon steel containing niobium has been carried out. The work has confirmed that EDD steels with drawing properties superior to those of existing aluminium stabilized steel may be obtained. A wide variation in properties was,however,produced due to the extreme difficulties in controlling laboratory hot rolling. Best properties were produced when a fine precipitate distribution was present in the hot band and when there was a pronounced hot band texture. As with titanium bearing steels,the niobium bearing steels recrystallize during annealing at higher temperatures than aluminum stabilized steel. On the basis of the results obtained, a successful works trial was carried out,the results of which will be given in a separate report.