Grinding balls inspection
Forged grinding balls are widely used in Gold mining or Copper mining
which will follow the strict quality control system
1.Raw material of steel balls Pre-production checks
Steel Bars ( Diameter, Length of Cut Bars , Heating number signature )
Equipment includes Air Hammer , Forging Hammer, Cooling time and Quenching time and etc.
Temperature control- Quenching Start temperature and quenching end temperature ( Produce 10 grinding balls
then stop production and test the samples )
2. Grinding balls Surface Hardness Measurement
Balls 1-----Balls 10 HRC recordings
Surface hardness Target
3. Grinding balls Core Hardness Test . Cutting 2 balls for further inspection
4. Heating treatment before Packing ( Record heating batch , temperature )
5. Final Hardness Test before dispatch , Marking the hardness result on the steel drum of grinding balls
