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Among the very latest advanced carbide grades, breakage. These factors contribute to reduced
ISCAR has developed the IC806 grade for tool life and high deformation of the cutting edge
turning and grooving high temperature alloys. even at low cutting speeds. Another complexity
ISCAR grade IC806 is a new, complementary associated with Inconel is its tendency to
SUMOTEC PVD coated grade for machining become malformed; this is due to its metallurgical
high temperature alloys, especially Inconel 718. sensitivity to residual stresses and self-hardening
The microstructure of Inconel 718 consists of an effects during cutting operations. ISCAR’s aim is
austenitic structure possessing high tensile and to effectively machine this unique material, and
yield strength. The major problems encountered has therefore successfully developed the IC806.
when machining Inconel 718 are characterized This is a submicron grade with TiAlN and ISCAR’s
by very high temperatures on the cutting edge of SUMOTEC coating resulting in superior wear
the insert, this is due to the abrasive elements in resistant properties. IC806 has a hard submicron
the materials’ composition (high nickel content of substrate with PVD coating and a special post
50-55% and chrome 17-21%), which can cause coating treatment that provides substantially
high wear rates, chipping, notching and insert improved tool life and better reliability.
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