Patent ID: 6444061
Filing Date: 2002-09-03
Classification: B21B,C22C,C30B,Y10T

Abstract:
A process for producing a heat-resistant intermetallic compound Ni3Al foil having a room-temperature ductility, which comprises a first step of arc-melting an alloy having a chemical composition containing Ni as a main component and Al to form a starting rod, wherein the alloy in the first step contains Al in an amount of at least 12.8% by weight and at most 13.6% by weight and has an Ll2-type ordered structure, a second step of growing the starting rod in columnar crystal form by unidirectional solidification to form a unidirectionally solidified rod, a third step of cutting out the unidirectionally solidified rod to form a plate, and a fourth step of cold-rolling the plate at room temperature to form a foil.