Advances in the Technology of Titanium Castings

Abstract

This paper describes the techniques used for making titanium casting and how current mould-making methods can produce pieces with good dimensional tolerances and surface finish. Both rammed sand and lost wax investment methods can be used for mould-making, the choice depending on piece complexity, weight, required finish and economic considerations. Hot isostatic pressing is normally applied to castings for aerospace and results are presented showing the beneficial effect of this process in terms of reduction of internal porosity. The effect of HIP on mechanical properties is also presented.