摘要
针对微波组件用Al-12Si合金盖板材料中存在粗大针状Si相导致强度不足的问题,采用喷射沉积−热压制备Al-12Si和Al-12Si-1Mn-0.6Mg合金,对比分析添加1%Mn和0.6%Mg对合金微观组织、力学和热物理性能的影响。结果表明:热处理后,Al-12Si-1Mn-0.6Mg合金组织中Si相呈近球形颗粒均匀分布于Al基体,平均尺寸为(4.4±0.2)μm,基体中形成细小的Mg_(2)Si、β″和Al_(6)Mn析出相。相对于Al-12Si合金,Al-12Si-1Mn-0.6Mg合金在保持良好热物理性能的情况下,显微硬度、抗拉强度和伸长率分别达到(74.4±1.2)HV、(231.2±2.1)MPa和4.8%±0.1%,其中抗拉强度提高23.4%,形成细小的析出相是是抗拉强度提高的主要原因。
To solve the problem of thick needle-like Si phase and insufficient strength of Al-12Si alloy for shell material,Al-12Si and Al-12Si-1Mn-0.6Mg alloys were prepared by spray deposition and hot pressing,and the effects of addition of 1%Mn and 0.6%Mg(mass fraction)on microstructure,mechanical and thermo-physical properties of Al-12Si-1Mn-0.6Mg alloy were investigated and compared.The results show that Si phase exhibits spherical shape with an average size of(4.4±0.2)μm,which distributes homogeneously in the Al matrix in the spray deposited Al-12Si-1Mn-0.6Mg alloy.At the same time,the fine Mg_(2)Si,β″and Al_(6)Mn precipitates form in the matrix after heat treatment.Compared with Al-12Si alloy,Al-12Si-1Mn-0.6Mg alloy maintains good thermo-physical properties,and its microhardness,tensile strength,and elongation reach are(74.4±1.2)HV,(231.2±2.1)MPa and 4.8%±0.1%,respectively,the tensile strength increases by 23.4%.The enhanced strength is mainly attributed to the precipitation strengthening.
作者
张辉
郭祊鹤
许春停
吴瑛
王日初
蔡志勇
ZHANG Hui;GUO Fang-he;XU Chun-ting;WU Ying;WANG Ri-chu;CAI Zhi-yong(China Electronics Technology Group Corporation No.38 Research Institute,Heifei 230088,China;School of Materials Science and Engineering,Central South University,Changsha 41000,China;Key Laboratory of Electronic Packaging and Advanced Functional Materials,Hunan Province,Changsha 410083,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2022年第2期322-331,共10页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51804349)。
关键词
Al-12Si合金
喷射沉积
热物理性能
力学性能
强化机制
Al-12Si alloy
spray deposition
thermo-physical property
mechanical property
strengthening mechanism
