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1. (WO2013125038) TITANIUM ALLOY FOR USE IN GOLF-CLUB FACE

Pub. No.:    WO/2013/125038    International Application No.:    PCT/JP2012/054619
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Sat Feb 25 00:59:59 CET 2012
IPC: C22C 14/00
A63B 53/04
C22F 1/18
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION
新日鐵住金株式会社
KAWAKAMI, Akira
川上 哲
FUJII, Hideki
藤井 秀樹
Inventors: KAWAKAMI, Akira
川上 哲
FUJII, Hideki
藤井 秀樹
Title: TITANIUM ALLOY FOR USE IN GOLF-CLUB FACE
Abstract:
The present invention provides a titanium alloy for use in the face of a golf club such as a driver or an iron. Said alloy complies with the limitation on coefficient of restitution, has a high Young's modulus and tensile strength, and excels in hot and cold workability. By mass, this alloy contains 1.0-3.5% aluminum, 0.5-1.4% iron, 0.2-0.5% oxygen, and 0.002-0.030% nitrogen, with the remainder comprising titanium and impurities. The alpha phase is strengthened by the addition of both oxygen and aluminum, and inexpensive iron was chosen as the beta-stabilizing element, resulting in both high strength and a high Young's modulus. The amount of aluminum, which reduces hot workability, is kept low, reducing the rolling load and minimizing scratches and edge cracking during hot rolling.