Manufacture of rotary drill bits

Details Manufacture of rotary drill bits Manufacture of rotary drill bits

1986-04-01

1987-06-02

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164 80, 419 6, B22D 1914

Patent

active

046695222

ABSTRACT:
A method of making a rotary drill bit comprises forming a hollow mould for moulding at least a portion of the bit body, packing at least a part of the mould with powdered matrix material, and infiltrating the material with a metal alloy in a furnace to form a matrix, the alloy being a copper based alloy containing phosphorus and being selected to provide an infiltration temperature which is not greater than 850.degree. C. and preferably not greater than 750.degree. C.

REFERENCES:
patent: 4485147 (1984-11-01), Nishino et al.

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