1 1. The wire is deoxidized in vacuum; 2. Cutting the wire into a certain length in a ball forming machine, and pressing the wire into a ball through a concave die and a convex die on hemispherical ball seats at two sides; 3. Clamping the compressed sphere between two grinding discs, rotating and pressing to remove burrs; 4. After heat treatment, quenching and tempering, the strength and wear resistance of steel balls can be improved. The microstructure of the ball obtained by heat treatment is composed of martensite, residual austenite and residual carbide. 5. Grinding the heat-treated ball with a special refiner to improve the shape accuracy and surface roughness; 6. Wash away the abrasive debris and other attachments on the surface of the sphere; 7. Check the surface of the ball with an optical automatic appearance sorter, and detect and remove the ball with scars on the surface.