Development of Slurry Preparation Method by Applying Mechanical Vibration
Development of Slurry Preparation Method by Applying Mechanical Vibration
复制标题
机械振动制浆方法的开发
DOI：
10.4028/www.scientific.net/ssp.285.333
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
N. Omura
中科院分区：
文献类型：
--
作者：
Y. Murakami;K. Miwa;M. Kito;T. Honda;N. Omura
半固态浆料的制备是半固态成形的关键技术之一。在本研究中，我们开发了通过施加机械振动来制备JIS AC4CH（相当于ASTM标准中的A356）和ADC 12（相当于ASTM标准中的A383）铝合金的浆料的方法。在该方法中，在从液态到半固态的冷却过程中对铝合金施加机械振动。通过控制振动条件来改变颗粒的形状。因此，我们研究了条件对机械振动的影响。在机械振动中有四个参数，即频率、加速度幅值、速度幅值和位移幅值。在这些参数中，速度幅值对固体颗粒形状的影响最大。通过适当控制频率和速度幅值，可以得到颗粒细小、球形的浆料。此外，还可以通过改变液相初始温度来控制浆料的固相率。特别是ADC12铝合金液固共存温度范围较低，不适合半固态成形。然而，通过使用这种机械振动方法，可以稳定地获得半固态浆料。该方法有望在半固态高压铸造工艺中得到有效应用。
The preparation of a semi-solid slurry with fine and spherical solid particles dispersed in the liquid phase is a key technology for the semi-solid process. In this study, we have developed the slurry preparation method by applying mechanical vibration for JIS AC4CH (equivalent to A356 in the ASTM standard) and ADC12 (equivalent to A383 in the ASTM standard) aluminum alloys. In this method, the mechanical vibration was applied to the aluminum alloys during cooling from a liquid state to semi-solid state. The shape of the particle was varied by controlling vibration conditions. Therefore, we investigated the effect of conditions on mechanical vibrations. There are four parameters which are frequency, acceleration amplitude, velocity amplitude and displacement amplitude in the mechanical vibration. Among these parameters, the velocity amplitude had highest effects on the shape of solid particles. By properly controlling of the frequency and the velocity amplitude, the slurry with fine and spherical solid particles could be obtained. Moreover, the fraction solid of slurry could be controlled by varied initial liquid temperature. Especially, ADC12 aluminum alloy has low liquid-solid coexistence temperature range, so it is not considered to be suited for the semi-solid process. However, by using this mechanical vibration method, the semi-solid slurry could be obtained stably. This method is expected to be effective for the semi-solid high-pressure die-casting process.