Furnace taphole drilling bit

Details Furnace taphole drilling bit Furnace taphole drilling bit

1976-10-12

1977-09-13

Whitehead, Harold D.

Stone working

Tools

Impact

76108A, B28D 126

Patent

active

040475140

ABSTRACT:
A drilling bit for use in making a taphole in a blast furnace. The drilling bit has a bit head having a plurality of cutting tips radially arranged on and soldered to the bit head. Soldering of the tips to the bit head is carried out by the use of a soldering material of a particular composition containing 3 to 5% by weight of carbon, 0.5 to 3.0% by weight of silicon and the balance iron, the sum of the carbon content and the silicon content in the composition being at least 4% by weight relative to the total weight of the composition. Each of the tips which are to be soldered to the bit head by the use of the particular soldering material is made of either stellite or a super hard alloy.

REFERENCES:
patent: 1701427 (1929-02-01), Shields
patent: 2867137 (1959-01-01), Joy
patent: 2995815 (1961-08-01), Dixon
patent: 3056196 (1962-10-01), Berg
patent: 3894676 (1975-07-01), Oppenheim

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