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

Zhang Shaozong; Jiang Bohong; Ding Wenjiang

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Microstructure and Hardness of Cast Cu-15Ni-8Sn-xTi Alloys
Issue 10, Pages: 669-671(2006)
Published： 2006 ，
DOI：

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[1]张少宗,江伯鸿,丁文江.铸造Cu-15Ni-8Sn-xTi合金的组织和硬度[J].特种铸造及有色合金,2006(10):669-671+607.

Zhang Shaozong, Jiang Bohong, Ding Wenjiang. Microstructure and Hardness of Cast Cu-15Ni-8Sn-xTi Alloys. [J]. Special Casting & Nonferrous Alloys (10):669-671(2006)
[1]张少宗,江伯鸿,丁文江.铸造Cu-15Ni-8Sn-xTi合金的组织和硬度[J].特种铸造及有色合金,2006(10):669-671+607. DOI：

Zhang Shaozong, Jiang Bohong, Ding Wenjiang. Microstructure and Hardness of Cast Cu-15Ni-8Sn-xTi Alloys. [J]. Special Casting & Nonferrous Alloys (10):669-671(2006) DOI：

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。

Abstract

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

Ti can restrain the formation and growth of γ’ phase and completely constrain the formation of cell structure.