铸造Cu-15Ni-8Sn-xTi合金的组织和硬度  

Microstructure and Hardness of Cast Cu-15Ni-8Sn-xTi Alloys

作　　者：张少宗[1] 江伯鸿[1] 丁文江[1] 

机构地区：[1]上海交通大学

出　　处：《特种铸造及有色合金》2006年第10期669-671,共3页Special Casting & Nonferrous Alloys

摘　　要：研究了铸造Cu-15Ni-8Sn-xTi合金时效过程中组织和硬度的变化规律。研究表明,与Cu-15Ni-8Sn合金一样,含Ti的Cu-15Ni-8Sn合金能通过调幅结构及γ′强化相的形成而得到强化。0.073%的Ti能完全固溶于Cu-15Ni-8Sn合金中,并加速基体中γ′相和晶界胞状组织的形成和生长。当Ti含量超过0.300%时,Ni与Ti形成新相Ni3Ti,抑制γ′相的形成和生长,并完全抑制胞状组织的形成。Effects of ageing on microstructure and hardness of cast Cu-15Ni-8Sn-xTi alloy were investigated.It was found that the cast Cu-15Ni-8Sn-xTi alloys are strengthened due to the formation and growth of the modulated structure and the metastable γ' phase similar to that of the cast Cu-15Ni-8Sn alloys.0.073% Ti can completely dissolve into Cu-15Ni-8Sn and accelerate the formation and growth of γ' phase in matrix and cell structure in grain boundary.The newly-formed phase of Ni_3Ti can restrain the formation and growth of γ' phase and completely constrain the formation of cell structure.

关 键 词：铸造Cu-15Ni-8Sn-xTi合金 组织 硬度 时效 

分 类 号：TG113[金属学及工艺—物理冶金]