Question

pbf: post-processing
use the information below to answer the question.
heat treating
one post - processing step for powder bed fusion (pbf) prints is to use heat treating.
heating the metal of the print and then quickly cooling it down removes any internal
stresses within the metal. this reduces the chance of it affecting the performance of
the piece.
support material
another step of post - processing for powder bed fusion (pbf) prints involves the
support material. the support material has to be removed by the operator using a
grinder once the print is complete. after the support material is removed, traditional
machine tooling techniques can be used such as welding, grinding, or polishing.
a subtractive manufacturing process can be done as well, whereby a cnc machine
removes material. sandblasting, electroplating, or micro - polishing can be done during
post - processing as well.
what must be removed from a powder bed fusion (pbf)
print once it is completed?
the inner core
the built - in base
the support material
the wax exterior

Explanation:

The text clearly states that for Powder Bed Fusion (PBF) prints, one of the post - processing steps is the removal of support material. It mentions that the support material has to be removed by the operator using a grinder once the print is complete. There is no mention of removing the inner core, built - in base, or wax exterior in the given text.

Answer:

the support material