| 摘要 |
PURPOSE:To produce a diamond bite for a tool utilizable as a diamond bit, a drawing die, a ceramic cutting bite, etc. CONSTITUTION:This diamond sintered compact consists of 20-85vol.% coarse diamond grains having >=3mum grain size and the balance 10-79vol.% binder and 1 to <5vol.% pores. The compsn. of the binder consists of 60-90vol.% superfine diamond grains having <=1mum grain size, 35-5vol.% carbide of a group IVa, Va or VIa metal of the periodic table having <=1mum grain size and <=10vol.% iron family metal. |
