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Letter 39088
Sandblasting WC-Co inserts before coating
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We have a discussion whether a providing of sandblasting WC
inserts before CVD coating is necessary. We do sanblasting because of
a few reasons: splinters of inserts made by pressing, reamining Co
phase on surface of inserts, we are not sure about some residual
stresess after sintering which sanblasting can partly remove. The
main discussion is about if we should provide sanblasting of
remaining Co phase on surface of inserts before CVD coating. Do we
need to do that? Thank you.
Stanislav Berger
powder metallurgy - Czech Republic
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