Ball with high wear resistance and ball valve using the same

A ball installed in a ball valve, the ball comprising:

• a ball main body comprising a penetrating hole penetrating from a front portion to a rear portion thereof and having a predetermined diameter, and a concave recess formed on an upper portion thereof to be coupled to a stem of the ball valve;
• and
• insert members formed of a super hardness material and coupled to a left side and a right side of the ball main body,
• wherein the insert members are coupled to the ball main body, such that, when the ball is installed in the ball valve and is placed in a position for closing the ball valve, each of the insert members covers a region of the ball contacting a seat of the ball valve,
• wherein a left side surface and a right side surface of the ball main body each comprises a flat surface, and comprises a protrusion protruding outward from each of the flat surfaces of the left side surface and the right side surface,
• wherein each of the insert members is a ring-shaped member surrounding each of the protrusions and is formed of sintered tungsten carbide having a Rockwell hardness (HRa) ranging from 81 to 92, and
• wherein the ring-shaped insert member fits over each protrusion and is coupled to the ball main body by using at least one of welding and adhesive, such that the insert member is coupled to each of the left side surface and the right side surface of the ball main body.