MANUFACTURING METHOD FOR HOLLOW MEMBER MADE OF TITANIUM-BASED COMPOSITE MATERIAL AND FOR HOLLOW VALVE MADE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method where the hollow part of a hollow member is easily formed of a titanium-based composite material by cutting work.;SOLUTION: The manufacturing method for the hollow member made of a titanium-based composite material comprises the following processes: a forging process for forging the forging material (8) that has an outer peripheral layer (81) made of a titanium-based composite material whose matrix, in which reinforced particles are dispersed, is mainly constituted of titanium and that has an inner peripheral layer (82) which is arranged inside the outer peripheral layer and which is made of a free-cutting titanium material having more excellent machinability than the titanium-based composite material; and a hollow-part forming process for forming a hollow part (101) by cutting the inner peripheral layer of the forging material that is obtained from the forging process. Since the inner peripheral layer is made of the free-cutting titanium material, the hollow part is easily formed by cutting.;COPYRIGHT: (C)2003,JPO