Parameters of the dendritic structure of copper alloys
Chem.
Met. Alloys 3
(2010) 197-200
https://doi.org/10.30970/cma3.0152
The influence of the conditions of
crystallization on the microstructure of a binary leaded bronze was examined.
The conditions of crystallization were modified by changing the cooling speed
of the melt through preliminary heating of the casting moulds. Quantitative
regularities of the influence of the cooling rate on parameters of the dendritic cells and the grain size are presented. Data on
the formation of lead inclusions between the dendrites of the copper matrix are
also reported. It is shown that cooling rates of the order 100‑150°Ñ/s
lead to the formation of dendritic structures
containing only axes of the first and second order. A decrease of the cooling
rate at the moment of crystallization to less than 15°Ñ/s leads to the
appearance of axes of the third order in the dendrite matrix.
Macrostructure of castings obtained at the
cooling rates 158°Ñ/s.
Keywords
Dendrites / Bronze / Crystallization / Copper