Method for Manufacturing a High-Strength Golf Iron Head with a Thin Striking Faceplate

A method for manufacturing a high-strength golf iron head with a thin striking faceplate comprising:

• placing a shell mold onto a rotary table, with the shell mold including a crucible portion and a cavity portion in communication with the crucible portion, with the rotary table coupled to a rotating shaft rotatable about a rotating axis;
• placing at least one metal ingot into the crucible portion of the shell mold, and melting the at least one metal ingot into molten metal in a vacuum environment;
• driving the rotating shaft to rotate the rotary table, causing the molten metal to flow into the cavity portion of the shell mold;
• slowly stopping the rotating shaft and removing the shell mold after pouring;
• destroying the shell mold after the molten metal cools and solidifies, obtaining a casting having a cast product portion;
• separating the cast product portion from the casting to obtain at least one golf iron head;
• and
• heat treating the at least one golf iron head to provide a striking faceplate of the at least one golf iron head with a tensile strength of 280-340 ksi, an elongation of 4%-20%, and a minimum thickness of 1.4-1.8 mm excluding a groove depth of the striking faceplate.