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Aluminum bronze BrA9Zh3L per GOST 493 solid state transformations and properties processing

According to aluminum-ferrous bronze BrA9Zh3L microstructure and reticular characteristics studies results, it has been found that under significant undercooling (cooling rate> 1°C /min) below eutectoid temperature (at ~ 500 °C), martensitic transformation occurs with high-temperature β-phase stabilization and/or its martensitic derivatives: β1, β1´, β´, etc. formation. Technological or natural impurity Zn>0, 2…0, 3 % content leads to impact properties catastrophic decreasing. This is due to in alloy, as eutectoid structure α+γ2 component, rhombohedral chemical compound γ2-Cu9Al4 of trigonal system formation. That is, such Zn content stimulates in lowtemperature region (<565°) diffusion eutectoid transformation with γ2-phase with its reticular characteristics negative for material of product formation.

Aluminum bronze ; properties

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