Conductor materials. Conductor bronzes. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Conductor materials. Conductor bronzes. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Electrical materials

Conductor bronzes belong to copper alloys, the need for the use of which is mainly caused by insufficient mechanical strength and thermal stability of pure copper in some cases.

The general nomenclature of bronzes is very extensive, but only few brands of bronzes:

cadmium bronze belongs to the most common conductive bronzes. Of all grades, cadmium bronze has the highest electrical conductivity. Due to the increased abrasion resistance and higher heat resistance, this bronze is widely used for the manufacture of trolley wires and collector plates;
beryllium bronze refers to alloys that acquire strength as a result of aging. It has high elastic properties, stable when heated up to 250 °C, and electrical conductivity 2-2,5 times higher than the conductivity of other grades of general purpose bronzes. This bronze has found wide application for the manufacture of various spring parts that simultaneously act as a current conductor, for example, current-carrying springs, certain types of brush holders, sliding contacts in various devices, plug connectors;
Phosphor bronze It has high strength and good spring properties; due to its low electrical conductivity, it is used for the manufacture of spring parts with low current densities.

Cast current-carrying parts are made from various grades of machine-building cast bronzes with a conductivity in the range of 8-15% of the conductivity of pure copper. characteristic feature of bronzes is low shrinkage compared to cast iron and steel and high casting properties, so they are used for casting various current-carrying parts of complex configuration, designed for electrical machines and apparatus.

All grades of cast bronzes can be subdivided into tin and tinless, where the main alloying elements are Al, Mn, Fe, Pb, Ni.

Author: Koryakin-Chernyak S.L.

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