Abstract
When the welding body is expanded, it shrinks in the direction of can height. The change of height of can is influenced by r-value.
The effect of cold rolling reduction on the r-value of niobium (Nb) and boron (B) combined added extra low-carbon steel was investigated by using commercial steels.
Ferrite grain size of annealed sheet decreased with the increase of cold rolling reduction. At the same time, the intensity of {001} <110> increased and the r90°-value decreased.
The behavior of the decrease of r-value was dependent on the ferrite grain size of hot-rolled sheet. The intensity of {001} <110> of annealed sheet was large for the hot-rolled sheet of grain size of 8.4 μm comparing with 10.8 μm and the r90°-value decreased.
