C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
57/17, 75/7.1
C22C 9/00 (2006.01) C09K 3/14 (2006.01) C22C 29/00 (2006.01)
Patent
CA 1054400
ABSTRACT OF THE DISCLOSURE A bond used in the manufacture of abrasive tools containing 3 - 75 wt.-% of copper, 15 - 90 wt.-% of chromium carbide; 0.01 - 10 wt.-% of a metal selected from the group including titanium vanadium, chromium, zirconium, niobium, molybdenum, tungsten; 1 - 30 wt.-% of a low-melting metal; 2 - 30 wt.-% of the metal belonging to the iron subgroup of VIII group of the periodic chart. The employment of the bond according to the invention, for example in the manufacture of drill bits from an abrasive materi- al based on cube boron nitride has made it possible to drill rocks of VIII - XI categories of drilling capacity at a drill speed and bit meterage exceeding 1.5 - 2 times drill speed and bit meterage that have formerly been attained with the use of drill bits made of diamond with a bond containing tungsten car- bide. While drilling rocks of VI-VIII categories of drilling capacity the bits made from cube boron nitride with the bond according to the invention surpass the carbide-faced bits, i.e. bits made by embedding hard-alloy cutting elements into a steel body by 1.5 times with respect to drill speed and up to 5 - 6 times with respect to bit meterage.
226276
Drui Mark S.
Ovseevich Rima S.
Senkin Gennady A.
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