Unlike conventional PM, MIM, HIP-CIP, or PF, spray forming is not used
to fabricate individual net-shape components. Rather, the process is used to
produce semi-finished mill products in the form of billets, tubes, and sheet/plate.
The process consists of sequential stages of liquid metal atomization and
droplet consolidation to produce a near-net-shape product. The as-sprayed
material is close to full density with a fine, equiaxed grain structure,
with mechanical properties that meet or exceed those of ingot-processed
alloys.
Spray forming is known for its high rate of metal deposition, typically
in the range of 0.5–5.0 lb./s. Commercial processing includes alloy
steels, stainless steels, tool steels, superalloys, aluminum, and copper-base
alloys.