Continuous Casting of Tin Containing Alloys and their Transformation

摘要

This paper deals with binary and ternary tin bronze processing. A first issue is the refinement of the as cast microstructure to facilitate homogeneization: vertical casting is usually associated with interdendritic spacings of about 100 micrometers while thin slab casting (horizontal usually) reduces the length scale for microsegregation to below 20 micrometers. This is crucial since the homogeneization time at a given temperature in the solutioning range varies with the square of that length scale. Microsegregation modelling is used to account for observations and micro-analyses and to guide process evolutions. The sequence of phase transformation in ternary Cu-Ni-Sn bronzes is presented to optimize the annealing and to reach a compromise strength / ductility / conductivity.