摘要
试制了一种含铝量高于铜铝二元合金共析点(11.8wt%)的耐磨铝青铜,研究了合金经过不同热处理后的组织和性能。结果表明,经920℃固溶处理及580℃时效后的合金具有优良的综合力学性能。合金强化是由于先析出第二相2γ的分布逐渐由连续网状转变为离散状,κ相质点的形状由尖变圆、粗大变得细小,并脱离网状硬脆相γ2的包围,镶嵌于强度和硬度综合性能较佳的β+α基体相中。
A novel aluminum bronze, with content of aluminum up to the Cu-Al eutectoid limit 11.8wt% was developed and the microstructures and mechanical properties of the alloy after different heat treatments were investigated. The experimental results demonstrate that the shape of the precipitate γ2 phase changes from net to dispersal, κ phase particles gradually change from large to small, taper to sphere, escapes from the surrounding knitted structure γ2 phase and disperses into β ＋ α matrix after the bronze quenched at 920 ℃ and aged at 580℃ ,and thus the alloy is remarkably strengthened.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2006年第8期71-76,共6页
Heat Treatment of Metals
基金
甘肃省科学技术攻关项目(GS992-A52-052)
兰州理工大学基金项目(12312)
关键词
铝青铜
热处理
组织与性能
aluminum bronze
heat treatment
microstructure and mechanical properties
