Patent ID: 7001570

Claim:
A process for producing a metal-made seamless pipe, which comprises: preparing a mixture containing (1) 80 to 98% by weight of a powder of at least one metal selected from the group consisting of Mo, W, Re, Ti, Hf and Zr, each having a melting point of 1,600° C. or more and (2) a binder in a solvent; kneading the mixture for up to 3 hours and then extruding the kneaded material to form a pipe-shaped material; and drying the pipe-shaped material at −5 to 25° C. for 10 hours to 48 hours from the completion of the extrusion and thereafter at 30 to 120° C. for 0.5 to 8 hours and then firing the dried material at a lower temperature selected from a temperature between 1,000 to 2,100° C. and a temperature lower by 300° C. than the melting point of the metal.