| 摘要 |
<p>PROBLEM TO BE SOLVED: To decrease backspin quantity of a golf ball by subjecting the clubface of the surface hardened head body of a golf club head to mirror finishing. SOLUTION: When the work for molding the head body is completed (step 100), a separately prepd. sole is mounted in the opening of a sole part and is coupled by welding to complete the head body (step 110). The clubface is then subjected to mirror finishing by buffing (step 120). This mirror finishing is so executed that the surface roughness of the clubface attains <1μm at. the max. (step 130). Next, the clubface is subjected to a carburization treatment in order to enhance the surface hardness of the clubface. Whether the head body to be subjected to mirror finishing is already subjected to the carburization treatment or not is decided prior to the treatment and in the case of the untreatment, the head body is subjected to the carburization treatment (step 140). For example, plasma carburization is executed as the carburization treatment (step 150). The surface hardness of the clubface is made 400 to 1,000Hv in Vickers hardness and the layer thickness 0.1 to 0.5mm (step 160).</p> |
