<正> 为探讨 Fe 元素在锡青铜中的机理行为,本工作是在 Cu-Fe,Cu-Sn 和 Fe-Sn 三个二元系相图基础上,用 X 射线粉末衍射法、金相法和微差热分析法测定了 Cu-Fe-Sn 三元系合金相图的室温截面和600℃等温截面.配制合金所用的材料是纯度为99.99%的Fe 和99.99%的电解 Cu 以及光谱纯的 Sn.每个试样按3g 配料,用感量为0.1mg 的光电天平测量,配料盛于 Al_2O_3坩埚内,在稍大于1个大气压的氩气保护下的高频感应炉中熔炼.熔好后的合金样品呈钮扣状,表面光滑,失重率小于
Isothermal sections of the phase diagram of the ternary Cu-Fe-Sn system at room temper- ature and 600℃ have been determined by X-ray powder diffraction method,microscopic observation and DTA.Eight single-phase regions:α,β,σ,ε,η,τ,ρ and θ;fourteen two- phase regions:β+η,β+θ,θ+η,θ+ρ,ρ+η,η+ε,ε+τ,τ+ρ,ρ+ε,ρ+α,α+τ,α+ε,ε+σ and α+σ:seven three-phase regions:β+η+θ,θ+η+ρ,ρ+η+ε,ρ+ε+τ,ρ+τ+α,α+τ+ε and α+σ+ε are observed at room temperature.Eight single-phase regions:α,σ,L,ρ′,τ,γ,ξ and ε; fourteen two-phase regions:L+ρ',L+ε,ρ'+ε,ρ'+τ ρ'+α,τ+ε,τ+ξ,τ+γ,ε+ξ,ξ+γ,γ+α,σ+α, γ+σ and τ+α;seven three-phase regions:L+ρ'+ε,ρ'+τ+ε,ρ'+τ+α,ε+τ+ξ,τ+ξ+γ,α+τ+γ and α+γ+σ are observed at 600℃.
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