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Unformatted text preview: toughness.
Particularly useful for machining nickel based alloys, cast iron and
The benefits of whisker-reinforced
ceramics involve certain limitations.
The SiC whiskers themselves have
been identified as a carcinogen, and
special precautions must be taken in
order to manufacture this type of
ceramic safely. Major Classes of Tool Materials
Nickel-based alloys are commonly used in the aerospace market due to
their high strength and heat resistance. This combination creates a
product that is difficult to machine with conventional tooling because
the material tends to work-harden during machining, which can lead to
“notching” on the cutting tool and, ultimately, insert failure.
Whisker-reinforced ceramics feature:
• an alumina base with the addition of silicon carbide (SiC)
whiskers, which have a high tensile strength that allows them to act
like rebar in the alumina-based matrix.
• improved notch resistance of the insert.
• cutting speeds five to six times those of conventiona...
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This note was uploaded on 02/04/2014 for the course ME 3162 taught by Professor Nus during the Spring '13 term at National University of Singapore.
- Spring '13