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PLEASE NOTE THAT
OUR PRODUCT RANGE AND SITE ARE CURRENTLY UNDER REVIEW
for more information please
contact -
Sales and Technical Enquiries
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Machining
Hard Steel
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What
is POLYCRYSTALLINE CUBIC BORON NITRIDE?
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Diamond,
cubic carbon, is the hardest, most abrasive resistant material
known to man. It is therefore
an ideal tool
material. Unfortunately, in the presence of heat and
iron, nickel or cobalt, diamond transforms to
hexagonal form, graphite. This is why ferrous materials are not generally
machined
with diamond.
The
second hardest material, Cubic Boron Nitride (CBN), is created
by man, using temperatures and pressures
similar to those for diamond synthesis, but does not have
this inherrant weakness when it
comes to the machining of ferrous
materials. Used in the correct manner CBN
offers cost-effective
rapid stock removal and finishing
of hardened steels and certain softer ferrous materials.
David
Richards offer five grades of PCBN material:-
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DR-100
For Rough Machining:
is
a fully solid high CBN content material and is used for
heavy
machining applications,where high stock
removal
rates provide an
attractive alternative to conventional
techniques.
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DR-80
and DR-85 For Special Tools & Semi Finishing:
materials
with a high CBN content and a tungsten carbide
substrate.
These are used for roughing applications,where
the
fully solid format
of DR-100 is not suitable or semi-finishing
applications where increased
fracture toughness is required.
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DR-50
and DR- 450 For Finishing:
DR-50
has a low CBN content and is designed for finishing and
semi-finishing
applications where grinding
with conventional
abrasives proves time consuming or difficult. DR-450 is tougher
and performs
well over severe interruptions.
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©
David Richards Engineering 2008
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