Controlling of the Solidification Structure for Recycling by Ultrasonic Vibration
Controlling of the Solidification Structure for Recycling by Ultrasonic Vibration
复制标题
超声波振动回收凝固结构的控制
DOI：
10.4028/www.scientific.net/msf.539-543.2345
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
K. Halada
中科院分区：
文献类型：
--
作者：
Y. Osawa;S. Takamori;K. Minagawa;H. Kakisawa;K. Halada
预计到2010年左右，日本废铝的产量将超过国内需求。建立“资源循环型社会”的关键是零排放过程。然而，回收材料会产生大量的废料，无法回收，将成为废物。考虑到预期用途并包括回收的设计应纳入材料开发中，以尽可能减少浪费。铁杂质与铝的混合导致在凝固过程中形成粗针状金属间化合物，并阻碍成品的回收能力。在凝固过程中的超声振动的应用进行了这项工作的目的是控制材料的形态。通过熔化含有4质量% Fe（以下，质量%缩写为%）的Al-Si合金来进行实验。从液相线开始形成的初生晶体为Al 3Fe、α AlSiFe（Al7.4SiFe2）和PAlSiFe（Al 9 Si 2Fe 2）金属间化合物。在Al-6Si-4Fe和Al-12 Si-4Fe合金中形成了粗大的针状金属间化合物，但施加超声振动导致形成了细晶组织。在Al-18 Si-4Fe合金中，组织可以从粗针状组织转变为细晶组织。
The production of aluminum scrap is expected to exceed the domestic demand in japan around the year 2010. The key to the establishment of a "resource recycling-based society" is the zero emission process. However, recycling materials will produce an amount of scrap that cannot be recycled and will become waste. A design that considers the intended usages and includes recycling should be incorporated into the materials development to reduce as much waste as possible. Mixing iron impurities with aluminum leads to the formation of coarse needle-shaped intermetallic compounds during solidification and hinders the recycling capacity of the finished product. The application of ultrasonic vibration during solidification was carried out in this work with the aim of controlling the morphology of the material. Experiments were performed by melting an Al-Si alloy containing 4 mass% Fe (hereafter, mass% is abbreviated by %). The primary crystals formed from the liquidus line of this alloy were intermetallic compounds identified as Al 3 Fe, α-AlSiFe (Al 7.4 SiFe 2 ) and P-AlSiFe (Al 9 Si 2 Fe 2 ). A coarse needle-like intermetallic compound was formed in the Al-6Si-4Fe and Al-12Si-4Fe alloys, but the application of ultrasonic vibration resulted in the formation of a fine grained structure. In the Al-18Si-4Fe alloy, the structure could be modified from a coarse needle-like structure into a fine grained structure.