Patent ID: 6736188
Filing Date: 2004-05-18
Classification: B22D

Abstract:
A barrel or shot sleeve of a casting apparatus for processing a metallic material into a molten or semisolid state, said barrel or shot sleeve comprising:a body defining a chamber therein, an inlet in communication with said chamber to permit the introduction of material into said chamber, an outlet in communication with said chamber to permit the discharging of material from said chamber, said body further including a sidewall portion having an exterior layer formed of a first material, an interior layer formed of a second material and defining an internal surface of said chamber, said second material being different from said first material; and an intermediate layer disposed between said exterior layer and said interior liner and bonding said exterior layer to said interior layer, said intermediate layer being formed of a third material, said third material being different from said first material and said second material; and said first material having the following Ni base composition, in weight percent: greater than 10% Cr, greater than 7.5% Co, greater than 2.5% Mo, in the range of 0-6% W, less than 4% Nb, greater than 2% Al, greater than 2.4% Ti and greater than 5.5% of Al+Ti such that said first material resists delta phase embrittlement.