On June 17, 2025, it was reported that according to information from the China National Intellectual Property Administration, Ningbo Jintian Copper (Group) Co., Ltd. obtained a patent titled "A Copper Alloy Bar and Its Preparation Method," with the authorization announcement number CN116179889B and an application date of January 2023. By adding Si, Ni, Mn, and Fe to the copper matrix and controlling their amounts, an average grain size of 0.015 to 0.01 mm was achieved. Through solution strengthening and aging strengthening, the copper alloy ultimately achieved a tensile strength of ≥650 MPa, a high-temperature softening resistance temperature of ≥650°C, a friction coefficient of 0.12 to 0.15, a corrosion weight loss of ≤1.2 mg/cm², and a fatigue strength of ≥360 MPa. While meeting the mechanical property requirements for bearing cages, it also exhibits good cold workability and can withstand complex stamping deformation.