Casting Quality Improvement by Gating System Optimization
Casting Quality Improvement by Gating System Optimization
复制标题
DOI：
10.24425/afe.2021.136089
复制
发表时间：
2021-01-01
影响因子：
0.6
通讯作者：
Galcik, M.
中科院分区：
文献类型：
--
作者：
Bruna, M.;Galcik, M.
二次氧化是造成铝合金铸件内部均匀性下降的主要原因之一。再氧化的产物是双重氧化物，即所谓的“双膜”。提交的文件涉及浇注系统设计的优化，以减少发生在模具型腔中的二次氧化过程。实验工作比较和评估三种浇注系统的设计基础上，非加压和自然加压的原则。第三种设计采用了非常规的流道延伸段。评价的方面包括：机械性能、热裂指数、平均气孔量的目视检查、速度、湍流和氧化物量的数值模拟。论文的目的也是澄清再氧化现象的可视化与ProCAST数值模拟软件的帮助。力学性能和热裂指数的结果清楚地证实了应用元件降低速度的自然加压浇注系统的积极效果。
One of the main reason for decreased internal homogeneity of aluminium alloy castings is reoxidation. The resulting products of reoxidation are doubled oxides, so called "bifilms". Submitted paper deals with optimization of gating system design in order to reduce reoxidation processes taking place in mold cavity. Experimental work compares and evaluates three gating systems designs based on non-pressurized and naturally pressurized principles. Unconventional spin trap extension of runner was used in third design. Among the evaluated aspects were: mechanical properties, hot tearing index, visual inspection of average porosity amount, numerical simulation of velocity, turbulence and oxide amount. Paper aim is also to clarify the reoxidation phenomenon by visualization with the aid of ProCAST numerical simulation software. Results of mechanical properties and hot tear index clearly confirmed the positive effect of the naturally pressurized gating system with applied element for velocity reduction.