固溶时效对新型Cu-Al-Fe系铝青铜合金力学性能的影响
Effect of Aging Treatment on Mechanical Property of Cu-Al-Fe Aluminum Bronze Alloy
米国发1, 王有超1, 张锦志1,2
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作者单位：1. 河南理工大学 材料科学与工程学院, 河南 焦作 454000; 2. 河南平原光电有限公司, 河南 焦作 454100
中文关键字：新型铝青铜； 固溶时效； 显微组织； 力学性能
英文关键字：novel aluminum bronze; solution and aging; microstructure; mechanical properties
中文摘要：对Cu-Al-Fe-Be合金和Cu-Al-Fe-Ni合金进行多种制度的固溶时效处理，并对铸态及各热处理态合金的组织结构、综合力学性能及电导率变化规律等进行对比研究。结果表明，固溶时效能够显著改善铝青铜合金的塑性，合金的强度、硬度并没有出现明显的下降，基本保持在淬火后的水平。延长时效时间能够有效提高合金的综合力学性能，但时效时间越长合金的电阻率越大。从“高强中导”的角度出发， Cu-Al-Fe-Be合金理想的热处理工艺为950 ℃× 2 h水淬 + 350 ℃ × 2 h水冷时效；Cu-Al-Fe-Ni合金理想的热处理工艺为950℃ × 2 h水淬 + 450 ℃ × 2 h水冷时效。研究结果还表明，较之Cu-Al-Fe-Ni合金，时效处理后Cu-Al-Fe-Be合金具有较好的综合性能。
英文摘要：The solution and aging treatment of Cu-Al-Fe-Be and Cu-Al-Fe-Ni aluminum alloy was carried out. The microstructure, mechanical properties of Cu-Al-Fe-Be and Cu-Al-Fe-Ni aluminum alloy as-cast and after heat treatment were studied, respectively. The results show that the solution and aging treatment can significantly improve the plasticity of Cu-Al-Fe-Be and Cu-Al-Fe-Ni alloys, while the strength, hardness remaines in the quenched level. The mechanical properties of the alloy increase with the increase of aging time, but the longer the aging time, the higher the electric resistance of the alloys. According to the results, the mechanical properties of Cu-Al-Fe-Be alloy can be improved remarkably by solution treatment at 950 ℃ for 2 h and aging at 350 ℃ for 2 h, and water cooling. While the most suitable heat treatment for the Cu-Al-Fe-Ni alloy is solution-treated at 950 ℃ for 2 h and aged at 450 ℃ for 2 h, and water cooling. The experimental result also shows that Cu-Al-Fe-Be alloy possesses higher hardness and tensile strength compared with Cu-Al-Fe-Ni alloy.