Patent ID: 6832961
Filing Date: 2004-12-21
Classification: A63B

Abstract:
A wood-type golf club head having a volume of not less than 300 cc, which comprises a main body and a face member disposed at the front of the main body to form a clubface, said face member formed by (i) forging an alpha-beta-type titanium alloy at a temperature which is less than the transformation temperature to the beta phase of the alloy, said temperature being not more than 100Â° C. less than said transformation temperature, and (ii) subsequent slow air cooling made without a blower within a temperature range of from 0 to 100Â° C., wherein,the face member is welded to the main body to form a junction therebetween, at least a part of said junction shifted backwards from the edge of the clubface by at least 5 mm, and the total length of the edge of the clubface where the extension is at least 5 mm is not less than 40% of the entire length of the edge, wherein the clubface F has a Vickers hardness in a range of from 300 to 380 Hv when measured according to Japanese Industrial Standard JIS-Z2244 with a load of 50 gf and a load duration time of ten seconds.