Cermet alloy and process for its production
AssigneeHitachi Metals, Ltd.
InventorsKatsuhiko Kojo, Akibumi Negishi, Masayuki Gonda
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Abstract
A cermet alloy having a structure comprising a hard phase and a bonding phase, said hard phase comprising (1) at least one of MC, MN, and MCN, wherein M is at least one element selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W (2) at least one compound selected from (M,Mo)(B,C), M,Mo)(B,N) and (M,Mo)(B,CN) and (3) at least one Mo--Co--B compound; said bonding phase comprising Co. The cermet alloy has superior toughness and hardness, and can be worked by conventional sintering methods. The invention also includes a method for producing the cermet alloy.
Claims18
In a cermet alloy having a structure comprising a hard phase and a bonding phase, said hard phase comprising (1) at least one of MC, MN and MCN, where M is at least one element selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W and (2) at least one Mo--Co--B compound, said bonding phase comprising Co, wherein the cermet alloy is characterized in that said hard phase further comprises at least one compound selected from (M,Mo)(B,C), (M,Mo)(B,N) and (M,Mo)(B,CN).
In a cermet alloy having a structure comprising a hard phase and a bonding phase, said hard phase comprising (1) at least one of MC, MN and MCN, where M is at least one element selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W and (2) a Mo--Co--B compound comprising CoMoB and CoMo.sub.2 B.sub.2, said bonding phase comprising Co, wherein the cermet alloy is characterized in that said Mo--Co--B compound comprises core/shell particles having a core comprising CoMo.sub.2 B.sub.2, said core having thereon at least a partial shell comprising CoMoB.
Dependencies are inferred from the claim text.