Wear and thermal shock resistant SiAION cutting tool material
AssigneeSandvik AB
InventorGunnar Brandt
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Abstract
A sintered ceramic material for high speed machining of heat resistant alloys is provided comprising SiAION grains and 0.2-20 v/o intergranular phase. At least 80 v/o of said SiAION phase is beta SiAION having a z-value greater than 1.0, but less than 1.5. The ceramic material has a Vickers Hardness HV1 of more than 1530 and it is produced by gas pressure sintering.
Claims5
A sintered ceramic material for high speed machining of heat resistant alloys said ceramic comprising SiAION and 0.2-20 v/o intergranular phase whereby at least 80 v/o of said SiAION phase is beta SiAION (Si.sub.6 --.sub.z Al.sub.z O.sub.z N.sub.8-z) having a z-value greater than 1.0, but less than 1.5, said sintered ceramic material having a Vickers Hardness HV1 of more than 1530.
Dependencies are inferred from the claim text.