Aday Döküm has specific heat treatment standards prepared according to the size, chemical content, and raw material type of the grinding balls.
Figure.1: Ball microstructure, (x100 magnification, 64-65 HRc, % 14 ostenit)
In general microstructure, secondary carbides are homogeneously distributed and in the structure;
Primary carbides (1), secondary carbides (2), grain boundary (3) show ideal distribution as in Fig.1..
As a result of the special heat treatment applied after casting and cooling in oil, the hardness value varies at most 2 HRC between the surface (S) and the center (C) (homogeneous wear).
Figure.2: Ball surface-center distribution
Figure.3: Sample ball surface homogeneous hardness distribution
The misalignment of a ball represents the difference between the maximum and minimum distance in any cross section of the diameter of the ball. Minimum deviation is aimed as the misalignment will affect the performance of the balls.
Acceptable deviation tolerances based on ball size
Figure.4: Internal running fracture
Figure.5: External running fracture
Figure.6: Misalignment
In the wear process of grinding materials, less than 2% by weight of breakage can be seen. Our grinding material breakage guarantee is as follows, provided that the mills are operated under normal operating conditions and are not run idle for more than ten minutes without waiting for the material to be grinded;
a) Between 0-2% : No replacement
b) Between 2-5% : Replacement of the broken quantity
c) 5% and above : Replacement of the whole quantity in which size the breakage occurs
Grinding balls are packed in metal barrels. The label on the barrel contains the manufacturer's information, the buyer's information, the ball diameter, the material information and the weight of the barrel.
