Patent ID: 6481088
Filing Date: 2002-11-19
Classification: A63B,B21J,B22D,Y10T

Abstract:
A method of fabricating a golf club with a club head having a metallic glass face of desired shape free from cold shuts comprising the steps of:filling a metal material in a hearth; melting said metal material by using a high-energy heat source which is capable of melting said metal material; pressing the molten metal at a temperature above a melting point of said metal material to deform the molten metal into the desired shape by at least one of compressive stress and shear stress at a temperature above the melting point, while avoiding surfaces of the molten metal cooled to a temperature below the melting point of said metal material from meeting with each other during the pressing; cooling said molten metal at a cooling rate higher than a critical cooling rate of the metal material simultaneously with or after said deformation to produce the metallic glass face; embedding said metallic glass face in said club head; and connecting said club head to a club shaft; and wherein said metallic glass face has a Vickers hardness of at least 300 Hv, a thickness in the range of 1.5 mm to 4.5 mm, and a value of the product EÃ—T of Young's modulus E (GPa) and thickness T (mm) in the range of 100 to 350.