Cemented carbide drill

Details Cemented carbide drill Cemented carbide drill

1990-01-25

1990-11-20

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Tool of specific diverse material

761086, 76DIG11, 407119, 419 15, B23B 2714, B23B 5100

Patent

active

049714856

ABSTRACT:
A drill is formed by a hard dispersed phase of WC and a B-1 type solid solution, and a bond metal phase of an iron family metal. The composition of the hard dispersed phase is expressed as (W.sub.a M.sub.b) (C.sub.x N.sub.y), where M represents Ti, or two or more metals, including Ti but excluding W, selected from the group IVa, Va and VIa of the periodic table, and a, b, x and y represents molar fractions which are defined by relational expressions of a+b=1, x+y=1, x>0, y.gtoreq.0 and b.gtoreq.0.4. The bond metal phase occupies at least 13 volume percent and not more than 30 volume percent of the cemented carbide.

REFERENCES:
patent: 4642003 (1987-02-01), Yoshimura
Hisashi Suzuki et al., Nihon Kinzoku Gakkai-shi, vol. 28, 1964, p. 55.

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