摘要
采用真空感应熔炼技术浇铸CuNiCoBe合金,利用光学显微镜、硬度计、电导仪,研究固溶、冷变形和时效处理工艺对CuNiCoBe合金组织和性能的影响。结果表明,CuNiCoBe合金较为合适的固溶温度为960℃;时效前冷变形有利于加快时效进程、缩短时效时间;冷变形量越大,合金时效后的室温硬度越高,达到时效硬化峰值的时间越短,峰值后硬度下降的幅度越大;总体说来冷,预冷变形亦有利于提高合金时效后的电导率,提高幅度平均约为10%。经960℃保温1.5 h固溶处理+60%冷变形+490℃保温2.5 h时效处理后的CuNiCoBe合金的硬度可达377 HV30,比未冷变形时提高了124%。
CuNiCoBe alloy was prepared by casting in a median frequency vacuum induction furnace,hot forging,solution treatment,cold deformation and aging.Microstructure and the properties of the CuNiCoBe alloy were investigated by optical microscope,hardness and conductivity tests.The results show that the proper temperature of solution treatment for CuNiCoBe alloy is 960 ℃.Pre-cold deformation is favourable to accelerate the aging process and shorten the aging time for the alloy and the higher microhardness after peak aging is observed in the alloy with high cold deformation.Pre-deformation increases electrical conductivity of the alloy by 10%.For the alloy solution-treated at 960 ℃ for 1.5 h plus 60% cold deformation and then aged at 490 ℃ for 2.5 h,its hardness reaches 377 HV30,increasing by 124% than that of the hot-forged alloy.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2010年第10期70-74,共5页
Transactions of Materials and Heat Treatment
