Cermet and Coated Cermet
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Apr 26, 2011
filing date -
Apr 26, 2010
priority date (Note) -
Abandoned
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Abstract
A cermet has a first hard phase of a complex carbonitride solid solution, a second hard phase of WC, and a binder phase mainly comprising Co and Ni as main component(s). The first hard phase has a core/rim structure. The core is represented by (Ti1-x-yLxMoy)(C1-zNz) and the rim is represented by (Ti1-a-b-dRaMobWd)(C1-eNe), wherein L and R each represent at least one element selected from the group consisting of Zr, Hf, Nb and Ta. If a maximum thickness of the rim of the core/rim structure grains of the first hard phase is given by rmax, and a minimum thickness of the rim of the core/rim structure grains of the first hard phase is given by rmin, a number of the core/rim structure grains of the first hard phase satisfying 0.2<(rmin/rmax)<1 is 85% or more, based on the total number of the core/rim structure grains of the first hard phase.
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