Abstract: An alloy for golf club heads includes 3.0-5.5 wt % of silicon, 8.0-10.5 wt % of manganese, 14.5-17.0 wt % of chromium, 3.5-6.0 wt % of nickel, the rest being iron and inevitable impurities.

Abstract: An aluminum-scandium alloy contains essentially of Si; Fe; Mn; Cr; Ti; from 1.9 wt % to 2.5 wt % Cu, from 2.0 wt % to 2.7 wt % Mg, from 5.9 wt % to 6.9 wt % Zn, from 0.08 wt % to 0.15 wt % Zr, from 0.01 wt % to 0.06 wt % Sc, balance aluminum and inevitable impurities.

Abstract: Disclosed is a golf club head having a striking plate made of a high-strength aluminum alloy including at most 0.06 wt % of Si, at most 0.1 wt % of Fe, 2 to 2.5 wt % of Cu, 1.5 to 2.5 wt % of Mg, 5 to 9.5 wt % of Zn, at most 0.05 wt % of Mn, 0.1 to 0.2 wt % of Zr, at most 0.05 wt % of Cr, at most 0.05 wt % of Ti, 0.01 to 0.1 wt % of Sc, and balance Al, wherein the weight ratio of Zn over Mg is from about 3.2 to about 4.4.

Abstract: A golf club head includes a striking face having a plurality of grooves formed therein. At least one groove includes a first curved side surface, a second curved side surface opposite to the first curved side surface, and a bottom surface connecting the first and the second curved side surfaces. As viewed in the longitudinal direction of the at least one groove, the first and the second curved surfaces respectively have first and second involute profiles. A distance measured between the first and the second curved surfaces continuously increases from the bottom surface to the striking face.

Abstract: A golf club head includes a striking face having a plurality of grooves formed therein. At least one groove includes a first curved side surface, a second curved side surface opposite to the first curved side surface, and a bottom surface connecting the first and the second curved side surfaces. As viewed in the longitudinal direction of the at least one groove, the first and the second curved surfaces respectively have first and second involute profiles. A distance measured between the first and the second curved surfaces continuously increases from the bottom surface to the striking face.

Abstract: Disclosed is a golf club head having a striking plate made of a high-strength aluminum alloy including at most 0.06 wt % of Si, at most 0.1 wt % of Fe, 2 to 2.5 wt % of Cu, 1.5 to 2.5 wt % of Mg, 5 to 9.5 wt % of Zn, at most 0.05 wt % of Mn, 0.1 to 0.2 wt % of Zr, at most 0.05 wt % of Cr, at most 0.05 wt % of Ti, 0.01 to 0.1 wt % of Sc, and balance Al, wherein the weight ratio of Zn over Mg is from about 3.2 to about 4.4.

Abstract: A golf club head is disclosed. The golf club head comprises a main body, a striking plate and a thermoplastic elastic vibration-absorbing material. The main body includes a chamber. The striking plate is disposed on the front side of the main body. The thickness of the striking plate is between 0.76 mm and 2.25 mm. The thermoplastic elastic shock absorber is formed in the chamber of the main body and touches the back of the striking plate, wherein the density of the thermoplastic elastic vibration-absorbing material is between 0.5 g/cm3 and 1.3 g/cm3.

Abstract: A golf club head includes a first portion forming a part of the head body of the golf club head, a second portion forming another part of the head body of the golf club head, and an intermediate layer. The first portion, the second portion, and the intermediate layer are made of different materials. Each of the first portion and the second portion has an abutting portion, with the intermediate layer being positioned between the abutting portion of the first portion and the abutting portion of the second portion. The intermediate layer and the abutting portion of the first portion are joined together by friction welding, and the intermediate layer and the abutting portion of the second portion are joined together by friction welding, thereby forming a golf club head product.

Abstract: A golf club head is disclosed. The golf club head comprises a main body, a striking plate and a thermoplastic elastic vibration-absorbing material. The main body includes a chamber. The striking plate is disposed on the front side of the main body. The thickness of the striking plate is between 0.76 mm and 2.25 mm. The thermoplastic elastic shock absorber is formed in the chamber of the main body and touches the back of the striking plate, wherein the density of the thermoplastic elastic vibration-absorbing material is between 0.5 g/cm3 and 1.3 g/cm3.

Abstract: A golf club head includes a striking plate component and a rear-assembling component mechanically connected thereto. The striking plate component provides with a striking face and a rear-connecting wall. The rear-connecting wall is bent rearward and extended a rearward extended length from the striking face. The rear-assembling component provides with a sidewall corresponding to the rear-connecting wall of the striking plate component. In assembling, the rear-connecting wall of the striking plate component connects with the sidewall of the rear-assembling component by means of an upstanding bent edge or a rear-assembling flange such that the rear-connecting wall separates the striking face from the rear-assembling component for permitting elastic deformation.

Abstract: An aluminum alloy includes manganese of about 1.1% to about 7.0% by weight, magnesium of about 0.1% to about 6.0% by weight, scandium of about 0.01% to about 1.5% by weight and the balance is essentially aluminum. Alloying elements of scandium, manganese and magnesium are added to form a columnar grain structure with a nano-complex phase in the aluminum alloy. Accordingly, the aluminum alloy has a high degree of physical and mechanical properties.

Abstract: A golf club head includes a golf club head body having a connecting groove and a filling space, and a striking plate having an annular upright bent wall and a connecting end. In assembling, the connecting end of the annular upright bent wall of the striking plate is initially inserted into the connecting groove of the golf club head body so that an intensified structure is provided. The filling space of the golf club head body is further filled with a braze material. In brazing, the braze material contained in the filling space of the golf club head body is melted and thus filled within a clearance between the connecting groove of the golf club head body and the connecting end of the striking plate to form a welded layer.

Abstract: A golf club head includes a golf club head body and at least one club head component. The golf club head body provides with an assembling opening which includes a welding inner circumference, a supporting bottom periphery and a tapered portion. The club head component correspondingly provides with a welding outer circumference and a rear periphery. In welding, the welding inner circumference of the assembling opening is engaged with the welding outer circumference of the club head component, and the supporting bottom periphery of the assembling opening is further engaged with the rear periphery of the club head component. The tapered portion of the assembling opening is used to form a space for releasing inert gas from a welding portion in welding operation.

Abstract: A plasma welding method for a golf club head includes the steps of: preparing a club head body and a striking plate, and mounting the striking plate to the club head body; moving a plasma nozzle to aim to a connection line formed between the club head body and the striking plate before the plasma welding; tilting the plasma nozzle a predetermined inclined angle with respect to a vertical direction of the combination of the club head body and the striking plate for the plasma welding; and controlling the tilted plasma nozzle to weld the striking plate to the club head body so as to constitute the golf club head.

Abstract: A plasma welding method for a golf club head includes the steps of: preparing a club head body and a striking plate, and mounting the striking plate to the club head body; moving a plasma nozzle to aim to a connection line formed between the club head body and the striking plate before the plasma welding; tilting the plasma nozzle a predetermined inclined angle with respect to a vertical direction of the combination of the club head body and the striking plate for the plasma welding; and controlling the tilted plasma nozzle to weld the striking plate to the club head body so as to constitute the golf club head.

Abstract: A method of making a golf club head is disclosed. A striking plate is attached to a front open end of a metal casing to cover an opening. The striking plate is placed over the front open end by contacting a rear surface of the striking plate with the front open end, thereby creating a clearance between the rear surface and the front open end. A brazing material is positioned on one of the rear surface and the front open end externally of and immediately adjacent the clearance. When the brazing material melts, it flows into the clearance through a capillary action, thereby forming a layer of brazing material between the rear surface and the front open end.

Abstract: A golf club head includes a golf club head body and a weight member mounted in a recession of the golf club head body. The weight member includes at least one solder channel for receiving solderable filler. The weight member is mounted in the recession of the golf club head body before a brazing process for bonding the weight member with the golf club head body. During the brazing process, the solderable filler is melted and fills a gap between the weight member and walls delimiting the recession of the golf club head body to thereby increasing bonding strength between the weight member and the walls delimiting the recession of the golf club head body.

Abstract: A golf club head includes a striking plate component and a rear-assembling component mechanically connected thereto. The striking plate component provides with a striking face and a rear-connecting wall. The rear-connecting wall is bent rearward and extended a rearward extended length from the striking face. The rear-assembling component provides with a sidewall corresponding to the rear-connecting wall of the striking plate component. In assembling, the rear-connecting wall of the striking plate component connects with the sidewall of the rear-assembling component by means of an upstanding bent edge or a rear-assembling flange such that the rear-connecting wall separates the striking face from the rear-assembling component for permitting elastic deformation.

Abstract: A golf club head includes a first portion forming a part of the head body of the golf club head, a second portion forming another part of the head body of the golf club head, and an intermediate layer. The first portion, the second portion, and the intermediate layer are made of different materials. Each of the first portion and the second portion has an abutting portion, with the intermediate layer being positioned between the abutting portion of the first portion and the abutting portion of the second portion. The intermediate layer and the abutting portion of the first portion are joined together by friction welding, and the intermediate layer and the abutting portion of the second portion are joined together by friction welding, thereby forming a golf club head product.

Abstract: A golf club head includes a golf club head body and at least one club head component. The golf club head body provides with an assembling opening which includes a welding inner circumference, a supporting bottom periphery and a tapered portion. The club head component correspondingly provides with a welding outer circumference and a rear periphery. In welding, the welding inner circumference of the assembling opening is engaged with the welding outer circumference of the club head component, and the supporting bottom periphery of the assembling opening is further engaged with the rear periphery of the club head component. The tapered portion of the assembling opening is used to form a space for releasing inert gas from a welding portion in welding operation.