| 摘要 |
A cutter assembly, for a rotary drill bit, comprises a preform cutting element (18) mounted on a carrier (19) in the form of a stud or post received in a socket in the bit body. The carrier (19) is a metal matrix composite, formed by sintering, hot-pressing or by an infiltration process, comprising tungsten metal particles in a metal binder phase or a mixture of tungsten metal particles and tungsten carbide particles in a metal binder phase. |
