FIELD: metallurgy.
SUBSTANCE: here are disclosed easy-to-cut copper alloys containing reduced amount of lead in comparison with traditional alloys. Alloys contain from 71.5 to 78.5 percent of weight of copper, from 2.0 to 4.5 percent of weight of silicon, from 0.005 percent and up to, but not less, than 0.02 percent of weight of lead and the rest percent of weight of zinc. Also alloy includes (a) matrix containing α-phase and (b) one or more phases chosen from the group consisting of γ-phase and κ-phase.
EFFECT: alloys are easy-to-cut, possess high durability and wear resistance, and also high resistance to oxidation at high temperatures.
45 cl, 7 dwg, 2 tbl, 30 ex
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