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本文研制了高导电铍铜合金(Cu-2.5％Ni-0.5％Be),并对该合金和 C17500合金(Cu-2.5％Co-0.5％Be)的组织、性能及强化机制进行了研究。CuNiBe合金经热处理后的最佳性能达到σ_b=1000MPa,电导率为48％IACS。CuCoBe合金最佳性能达到σ_b=980MPa,电导率为43％IACS。结果表明,CuNiBe合金可代替CuCoBe合金。CuNiBe合金的时效强化相为NiBe相,CuCoBe合金的强化相为CoBe相。固溶处理后的冷变形促进了时效过程,使析出相更加弥散,同时使合金在时效过程中发生再结晶,细化了合金晶粒,使合金强度提高,导电性也得到改善。本文给出了合金的最佳热处理规范,以便在生产中采用。
In this paper, a highly conductive beryllium copper alloy (Cu-2.5% Ni-0.5% Be) was developed and the microstructure, properties and strengthening mechanisms of this alloy and the C17500 alloy (Cu-2.5% Co-0.5% Be) were studied. CuNiBe alloy after heat treatment to achieve the best performance σ_b = 1000MPa, conductivity of 48% IACS. The best properties of CuCoBe alloy σ_b = 980MPa, conductivity of 43% IACS. The results show that CuNiBe alloy can replace CuCoBe alloy. CuNiBe alloy aging strengthening phase is NiBe phase, CuCoBe alloy strengthening phase is CoBe phase. The cold deformation after solution treatment promotes the aging process and makes the precipitated phase more dispersed. At the same time, the alloy recrystallizes during the aging process, and the grain size of the alloy is refined so that the strength of the alloy is improved and the conductivity is also improved. This article gives the best heat treatment specifications for the alloy used in production.