Nagano Prefecture

E & F Corporation

E & F Co., Ltd.

Toshio Tanimoto

Hidekazu Takizawa

To provide a golf club head which is easy-to-hit and which restrains the reduction of flight distance at the time of off-center shot to the minimum without making a sacrifice of the flight distance at the time of sweet spot shot, and a method for manufacturing the golf club head, a golf club head () has a hollow structure including a face portion () and a body portion (), the body portion () includes a ring-shaped body barrel portion () as a front portion, and a tail portion () as a rear portion, and the average thickness of the body barrel portion () is 0.1 to 0.6 mm, and the mass of the tail portion () including a weight portion () is 20 to 70 g. The relations k/k&#x2266;3 and 2 kN/mm&#x2266;1/(1/k+1/k)&#x2266;5 kN/mm are satisfied where k(kN/mm) is the rigidity of the face portion () and k(kN/mm) is the rigidity of the body barrel portion ().

Golf club head, and method for manufacturing the golf club head

A titanium alloy composite material including dispersed carbon fibers coated with a layer containing an element which forms a carbide in reaction with carbon, and the carbide formed thereby, in crystal grains of the titanium alloy. The element which forms a carbide in reaction with carbon is preferably at least one of silicon (Si), chromium (Cr), titanium (Ti), vanadium (V), tantalum (Ta), molybdenum (Mo), zirconium (Zr), boron (B), and calcium (Ca). The carbon fibers are preferably carbon nanotubes, vapor-grown carbon fibers, or a mixture thereof. The titanium alloy composite material has excellent mechanical strength, such as tensile strength, Young's modulus, toughness, and hardness.

Titanium alloy composite material, titanium clad material using the titanium alloy composite material, and method of producing the titanium clad material

Growing community of inventors

Toky, Japan

Toshio Tanimoto