| 摘要 |
PURPOSE:To obtain a TiB2-base sintered hard alloy having very high hardness and higher sinterability than a conventional alloy by bonding TiB2 with an Ni- Zr alloy so as to make use of the high hardness and wear resistance of TiB2. CONSTITUTION:TiB2 is bonded with an Ni-Zr alloy prepd. by adding 2-98.7wt% Zr to Ni to obtain a TiB2-base very hard alloy. The amount of the Ni-Zr alloy used is 0.1-50wt% of the amount of TiB2. When the TiB2-base very hard alloy contg. the Ni-Zr alloy as a binder is used, a high density sintered body is easily manufactured by conventional sintering under ordinary pressure. The TiB2-base sintered hard alloy is provided with advantages of TiB2 and has high hardness and deflective strength.
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