تأثير المعاملات الحرارية و عناصر السبك على خواص السبائك (نحاس-نيكل-قصدير)‎

Abstract EN

Copper-Nickel-Tin alloys have been recently developed by Hardening due to spinodal decomposition.

The (Cu - 9Ni - 6Sn) system has shown promise in this direction and has been used to develop several high strength compositions.

It is well known the fact that small element additions significantly modify phase transformation characteristics, the effect of adding (0.3%) silicon or Aluminum on the Spinodal hardening in (Cu - 9Ni - 6Sn) alloy was studies close to the Spinodal cusp temperature . It was found that the additions of Si & Al gave rise to a certain amount of stabilization of mechanical properties with time of ageing.

The presence of Aluminum also increased the ductility of alloy at the expense of some hardness .

The effects of trace elements additions have been observed in this work with a view to improve high strength alloys as substitutes to the Copper – Beryllium alloys .