From the component
designer's viewpoint, designing parts to be made from PRIMEX CAST
based composites is nearly identical to that for conventional aluminum.
PRIMEX CAST based components, cast from MCX-1605 and MCX-1405can
be cast using any of the conventional aluminum casting methods (e.g., sand,
investment shell, permanent mold, or high-pressure die). However, MCX-1195
is limited to investment shell and high-pressure die casting techniques.
apply similar draft angles and can expect to achieve similar dimensional tolerances
process for process, as if conventional aluminum casting alloys were being
used. Some process differences do exist, (e.g., melt handling, melt flow,
shrinkage, and gating issues) but these differences are most often the responsibility
of the foundry engineers.
As with casting,
the machining parameters used for PRIMEX CAST based composites are similar
to those used for conventional aluminum. Speeds and feeds, at the low end
of those used for conventional aluminum, are utilized. However, because SiC
is very hard, and is itself used for cutting tools, the machining of these
SiC reinforced composites requires the use of diamond or poly-crystalline-diamond
cutting tools. These composite materials are also amenable to conventional
lapping and EDM machining.
As with casting
and machining, conventional aluminum coating and plating materials and methods
are readily applied to components made from PRIMEX CAST based composites.
This is true whether components have "as cast" or machined surfaces.
Likewise, standard techniques for Hot Isostatic Pressing and quality inspection
are routinely used.
recommends that customers involve us in the design process. While the customer
undertakes the mechanical and thermal aspects of the design, TTC and its foundry
engineers can provide valuable input on alloy and process selection, as well
as on manufacturabliity issues. Involving TTC early in the design process
will help to minimize design iterations, while maximizing the efficiency of
the design process.
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