Face guard for use in ball game and method for making the same

A method for making a face guard for use in a ball game, comprising the steps of:

• providing a specific material;
• annealing the specific material by first keeping the specific material at a constant temperature, which is within a range of 41° and 430° C., for 3 hours and then cooling the specific material at a temperature reduction rate of about 30° C./hour in order for the specific material to have a fixed shape;
• cutting the annealed specific material into a main-body member and a plurality of supporting members;
• butt-joining two ends of the main-body member by a cold welding process, wherein the cold welding process comprises applying a specific pressure to the two ends of the main-body member in order to join the two ends together;
• welding the supporting members to the main-body member in such a way that the supporting members are arranged at intervals, thereby forming a face guard body;
• after applying the cold welding process to the main-body member and welding the supporting members to the main-body member, performing a T4 heat treatment on the face guard body by first keeping the face guard body at a first selected constant temperature between 45° and 550° C. for 1 hour and 30 minutes and then quenching the face guard body for 7 seconds;
• performing a T6 heat treatment on the face guard body by first keeping the face guard body at a second selected constant temperature between 10° and 120° C. for 24 hours and then cooling the face guard body by air;
• and
• performing a surface treatment on the face guard body.