SURFACE HARDENING TREATMENT METHOD FOR amp;beta; TYPE TITANIUM, amp;beta; TYPE TITANIUM BASED MEMBER AND SURFACE HARDENING TREATMENT DEVICE FOR amp;beta; TYPE TITANIUM

摘要

PROBLEM TO BE SOLVED: To provide a surface hardening treatment method for a β type titanium based metal, in which the thickness of an oxidized layer formed through oxygen pack cementation is suppressed to the minimum, and further, a hardened layer can be formed from the surface to 100 μm.;SOLUTION: Regarding the surface hardening treatment device 10 for βtype titanium, a β type titanium based member 11 is subjected to heating treatment in a gaseous mixture of gaseous argon and oxygen, wherein heating treatment is performed in an oxygen concentration of 0.05 to 20 vol% at 700 to 1,000°C for 10 to 30 min, and thereafter, aging treatment is performed at 400 to 550°C for 6 to 12 hr.;COPYRIGHT: (C)2005,JPO&NCIPI