Why does the aspect ratio of powder metallurgy machine parts need to be controlled?
Mainly related to the mold, or die punches easily damaged, affecting the die life.
The traditional unidirectional pressing leads to uneven density distribution, which leads to the limited ratio of height to diameter, and to friction compaction.
This is the material, process, mold, equipment restrictions,When the material is pressed in the height direction, the density is too high, but the diameter is too high. The density gradient is too large and the strength of the blank is too low to form.
