摘要
研究了CuNiTiBe合金在不同热处理工艺条件下的性能,并由此确定了最佳工艺参数;通过光学显微镜及透射电镜分析了其强化机理。结果表明:合金在940℃×1 h水淬固溶+480℃×2 h时效的热处理条件下,其力学、电学性能存在最佳匹配,电导率为17.4×106S.m-1、硬度为270 HV、软化温度为670℃;平均晶粒尺寸≤3μm,组织中含有大量孪晶;Be2Cu增强相与基体存在共格关系,合金基体上分布着两种形态的Ni3Ti、Be2Cu增强相,其一是弥散分布的纳米级等轴颗粒,其二是呈多种几何形态的微米级颗粒;合金在细晶、孪晶和增强相的共同作用下提高了强度、硬度和抗高温软化能力。
The performance of CuNiTiBe alloy produced under different heat processing technological conditions had been studied.The best technological parameters had been determined by performance test.The strengthening mechanison had been analyzed using optical microscope and transmission electron microscope.The results indicate that the best match between the mechanical properties and electrical performance existed when the alloy was treated by such technology as 940 ℃×1 h(water quenching) solid solution +480 ℃×2 h ...
出处
《机械工程材料》
CAS
CSCD
北大核心
2008年第10期31-34,39,共5页
Materials For Mechanical Engineering
基金
江苏省科技攻关资助项目(BE2005080)
