The ballpoint pen is to rely on the free scroll ball in the tee, which with ink adhesion on the writing carrier, the ball is directly contact with paper or other carrier. The history of the ballpoint pen development has more than 100 years, with the progress of science and technology and the improvement of people's cultural life. The ball is developped from the traditional oil-based ballpoint pen to a water pen, gel pen, Petroleum pen and erasable pens and other products, but the ball is always been the important part to guarantee the writing performance of a ballpoint pen. Ball-point pens use the ball which is a very small sphere.Currently, the main materials are stainless steel, carbide balls (tungsten carbide ball), ceramic balls and so on, the size is from Φ0.30mm to Φ1.60mm. In the current market, most of the ball are carbide balls (tungsten carbide ball), hardness ≥ 1300HV, require high dimensional accuracy and suitable surface roughness. If the ball is used with water or gel ink, it is also need good corrosion resistance.