摘要
采用正交试验方法，研究了Ce、Mn、Cr对高铁共晶铝硅合金组织和性能的影响。发现：Mn、Cr改善了β（Al9FeSi3）相的形貌，形成含Mn、Cr铁相；稀土Ce对共晶硅的细化作用明显，在高的Ce质量分数下，Ce进入含Mn、Cr的铁相，很好地改善其形貌、减小铁相的尺寸，并能代替Ni的位置形成耐高温Al-Ni-Cu-Ce相。Ce、Fe、Mn、Cr的最佳加入量为0．8％、1．0％、0．4％、0．1％，合金常温（25℃）和高温（300℃）抗拉强度分别达到270．3MPa、136．7MPa，完全能满足新型活塞高温负荷的使用要求。
The effects of Ce, Mn and Cr on microstructure and properties of eutectic aluminium silicon alloy were researched with orthogonal test. The results show that the morphology of β （A19FeSi3） is improved by Mn and Cr to form Fe phase with Mn and Cr. The effect of Ce on refining eutectic silicon is obvious. In higher Ce content, the Ce gets into Fe phase to improve its morphology and decrease its size, and the high temperature Al-Ni-Cu-Ce phase is formed instead of the position of Ni. The optimum contents of Ce, Fe, Mn and Cr are 0.8%, 1.0%, 0.4% and 0.1%. The normal temperature and high temperature tensile strength reach to 270.3 MPa and 136.7 MPa to meet the operating requirements of high temperature load for new pistons.
出处
《铸造工程》
2012年第6期1-5,共5页
Foundry Engineering
关键词
共晶铝硅合金
正交试验
稀ice
FERN
高温性能
eutectic aluminium silicon alloy
orthogonal test
Ce
Fe phase
high temperature property
