热处理对QAl11-6-6合金挤压棒组织与硬度的影响  

Effect of Heat Treatment on Microstructure and Hardness of QAl11-6-6 Alloy Extruded Rod

作　　者：刘莹雪 刘鹏程 胡克福 吕永生 林高用[1] LIU Yingxue;LIU Pengcheng;HU Kefu;LYU Yongsheng;LIN Gaoyong(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China;Guixi Junda Special Copper Materials Co.Ltd.,Yingtan 335400,Jiangxi,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]贵溪骏达特种铜材有限公司,江西鹰潭335400

出　　处：《矿冶工程》2025年第1期160-165,共6页Mining and Metallurgical Engineering

基　　金：贵溪市铜产业升级科技攻关计划项目(GXTCY2022-06)。

摘　　要：采用正交试验法,并结合金相显微镜、X射线衍射仪、扫描电镜和硬度计,研究了时效时间、时效温度、固溶时间、固溶温度等热处理参数对QAl11-6-6铝青铜合金挤压棒组织和性能的影响。结果表明:试验合金挤压态组织由α、κ(AlFe、AlFe_(3)、AlNi)、γ_(2)以及剩余的β′相组成;固溶+时效热处理可有效提高该合金挤压棒的硬度,4个热处理工艺参数对合金硬度的影响强弱顺序依次为:时效时间>时效温度>固溶时间>固溶温度。试样在910℃固溶45 min后采用水冷淬火,再经450℃×150 min时效处理,合金硬度由挤压态的33.4HRC提升到40.1HRC,呈现明显的时效硬化特性;较多的类马氏体β′相的析出是合金时效后硬度显著提高的主要原因。The effect of heat treatment parameters on the microstructure and properties of QAl11-6-6 aluminum bronze alloy extruded rod was explored by performing orthogonal test,in combination with metallographic microscope,X-ray diffractometer,scanning electron microscope and hardness tester.The results show that the microstructure of extruded aluminum bronze alloy consists ofα,κ(AlFe,AlFe_(3),AlNi),γ_(2),and the remainingβ′phases;the heat treatment including solid solution and aging can effectively improve the hardness of the alloy extruded rod;the influence of four process parameters on the hardness of the alloy is in the following descending order:aging time>aging temperature>solid solution time>solid solution temperature.The sample was quenched by water cooling after solid solution at 910℃for 45 min,and then treated by aging at 450℃for 150 min.The hardness of the alloy was increased to 40.1HRC from previous 33.4HRC in the extruded state,presenting obvious age hardening effect.It is found that precipitation of more martensite-likeβ′was the main reason for significant increase in hardness of the alloy after aging treatment.

关 键 词：QAl11-6-6 铝青铜合金 挤压棒 固溶 时效 硬度 热处理 析出相 

分 类 号：TG166.2[金属学及工艺—热处理]