The difference between forged balls and hot-rolled grinding balls

For grinding balls with a diameter of 90mm, customers are advised to choose forging balls. As a large-sized ball, it is made by air hammer forging technology (pictured above). Heat the steel rod and then repeatedly forge it with an air hammer. Due to the multiple times of external forces, the internal density will increase and the grains will be refined, thereby improving the toughness of the ball. Better toughness and large size grinding balls will not break easily. Through our special heating treatment. Core and surface hardness will be improved.

Through forging technology, our customers will get better hardness and toughness of grinding balls. This will save mining costs with better wear rates and near "0".

Therefore, large-sized balls, especially in depressions, must ensure the toughness and impact value of the ball to avoid rupture.

They chose to hot roll to produce 50mm balls. A customer told us that almost local factories in Europe can produce small grinding balls using hot rolling mills. But there is no air hammer forging machine. Therefore, only China has air hammer forging machines. This is the advantage of our production of large-sized balls.

Hot Rolled Ball

Hot rolling mill

Greater production capacity than forged balls

Suitable for small balls of 25mm-70mm.

The round steel is directly ground to the round grinding ball by a hot rolling mill, with small external force, which makes the internal structure less change

Toughness and impact values ​​will be lower than forged balls

If the compression ratio of the raw material (round steel) is insufficient, the toughness and impact values ​​of the made grinding balls will become worse.

Therefore, the key to controlling the quality of hot rolled grinding balls is to select qualified raw materials.

Small size balls are not prone to cracking in ball mills, so we recommend choosing hot rolling balls.