HIGH-STRENGTH TITANIUM ALLOY MEMBER AND PROCESS FOR PRODUCTION THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a high-strength titanium alloy material which is highly strengthened in whole by applying nitrogen in a highly versatile α-β type titanium alloy.

SOLUTION: A process for producing the high-strength titanium alloy member includes: a step of preparing a sintering titanium alloy raw material that serves as a raw material for a sintered product; a nitrogenation step of forming a nitrogen compound layer and/or a nitrogen solid solution layer on the surface layer of the sintering titanium alloy raw material by a nitrogenation treatment to produce a nitrogen-containing sintering titanium alloy raw material; a mixing step of mixing the sintering titanium alloy raw material with the nitrogen-containing sintering titanium alloy raw material to produce a sintering titanium alloy raw material containing a nitrogen-containing titanium alloy; and a sintering step of bonding the raw materials to each other in the sintering titanium alloy raw material containing the nitrogen-containing titanium alloy and dispersing nitrogen contained in the nitrogen compound layer and/or the nitrogen solid solution layer in the nitrogen-containing sintering titanium alloy raw material uniformly in the form of a solid solution in the whole of the inside of the titanium alloy member after sintering.

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