摘要
利用金相显微镜、X射线衍射仪和扫描电镜等研究了Fe含量对亚快速凝固态高铝青铜Cu-15Al-X Fe(X=0,1,4,7,10,12,15)合金组织和性能的影响。结果表明,Fe含量的变化对亚快速凝固态高铝青铜合金的组织形态有显著影响。随着Fe含量增加,合金形貌由单一柱状晶结构向等轴晶转变。当w(Fe)≤7%时,合金主要由先共析γ_2相和(α+γ_2)共析体组成,随着Fe含量增加,柱状晶间距减小,γ_2相由稀疏粗大网状变成细密均匀的枝晶状;当w(Fe)≥10%时,合金主要由(α+γ_2)共析体一定体积的κ相组成,随着Fe含量的增加,κ相逐渐增多并合并长大。合金的硬度呈现出先上升后下降的趋势,合金的最大硬度值出现在w(Fe)为4%时,此时硬度值为492 HV。
The influence of different iron content on sub-rapidly solidified high aluminum bronze microstructures and properties were investigated by using optical microscopy,X-ray diffraction and scanning electron microscope.The results show that the iron content will great influence on the microstructure and phase composition of sub-rapidly solidified high aluminum bronze alloys.With the increase of Fe content,the morphology of alloy is transformed from columnar grain to equiaxed grain.When w（Fe） ≤7%,the microstructure of alloys consists of γ2＋（α＋γ2）.As the increase of Fe content,columnar grain is refined gradually and γ2 is transformed from coarse net structure to fine and dense dendritic structure;when w（Fe）≥10%,the microstructure of alloys is composed of（α＋γ2）＋κ,in which the phase increases gradually becomes coarsening with Fe content increasing.The hardness of alloys increase at first and then decrease with Fe addition increasing,and the maximum hardness value reaches 492 HV.
作者
管红艳
张汉山
袁庆龙
GUAN Hongyan;ZHANG Hanshan;YUAN Qinglong(School of Mechanical Engineering,Shangqiu Institute of Technology,Shangqiu 476000,China)
出处
《铸造技术》
CAS
2018年第11期2506-2509,共4页
Foundry Technology
基金
校级科研重点资助项目(2018XKZ01)
关键词
亚快速凝固
高铝青铜
铁
微观组织
sub-rapidly solidified
high aluminum bronze
iron
microstructure
