| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of treating the surface of a substrate constituted of a titanium alloy and titanium, capable of improving mechanical strength and fatigue strength by hardening the vicinity of the surface of the substrate constituted of the titanium alloy and titanium. <P>SOLUTION: The method of treating the surface of the substrate comprises a step A of applying a shot peening treatment to the surface of the substrate constituted of the titanium alloy and titanium, a step B of subjecting the substrate to a first heat treatment in a temperature range T1, a step C of subjecting the substrate to a second heat treatment in a temperature range T2, and a step D of subjecting the substrate to a third heat treatment in a temperature range T3, in this order. The temperature ranges satisfy the relation: T1>T2>T3, provided that T1 is at least 900°C and not higher than 1,000°C. <P>COPYRIGHT: (C)2013,JPO&INPIT |
