We have developed a high gradient unidirectional solidification horizontal continuous casting apparatus to investigate the preparation process of Cu-Cr in-situ composites.It was revealed that inter-matching among parameters

including glory-hole temperature

cooling intensity and drawn velocity

has the significant effects not only on the control of liquid-solid zone but also on the surface quality and internal unidirectional structure of the Cu-Cr bar.With the drawn velocity keeping 245 μm/s

the microstructure is composed of eutectic （α+β） phase and primary α phase

in which the eutectic （α+β） phase is parallel to primary α phase

uniformly arranged along axial direction with the continuous fibres

while primary α phase exhibits cellular character at a low drawn velocity

restrained by thermal flow in growth direction.