UNWROUGHT CONTINUOUS CAST COPPER-NICKEL-TIN SPINODAL ALLOY

摘要

An unwrought continuous cast Cu-Ni-Sn spinodal alloy and a method for producing the same is disclosed. The Cu-Ni-Sn spinodal alloy is characterized by an absence of discontinuous .gamma.' phase precipitate at the grain boundaries, ductile fracture behavior during tensile testing, high strength, excellent wear and corrosion resistance, superior bearin g properties, and contains from about 8-16 wt.% nickel, from about 5-8 wt.% tin, and a remainder copper. As a method for producing the spinod al alloy, a continuous cast Cu-Ni-Sn billet, hollow billet, or rod composed of small, equiaxed crystals is subjected to solution heat treatm ent and aging steps to effect spinodal decomposition type phase transformation. According to our invention, it is not necessary to subject the cast rod, billet or casting to wrought processing prior to the spinodal decomposition heat treatment in order to obtain a strong and ductil e material, thereby allowing for the use of the unwrought continous cast Cu-Ni-Sn spinodal alloy in the manufacture of various components which heretofore have been manufactured from materials other than an unwrought Cu-Ni-Sn spinodal alloy.