【摘要】 以100%硅砂使用CO2法制作砂型,并有系统改变A201铝合金平板铸件的长度、厚度、及冒口大小的方案设计,研究砂型中A201铝合金平板铸件力学性能及微孔隙的变化情形,进而探讨铸件的健全性,可于铸造实务工作时,作为冒口设计及金属凝固之参考,为本研究的目的。由实验结果显示,在本研究中适当尺寸的冒口设计与铸件尺寸的关系,有助于获得健全性的铸件。此外,A201铝合金平板铸件的抗拉强度及伸长率的变化受孔隙率的影响,铸件的微孔隙的量增多,与抗拉强度下降及伸长率下降有关联性。更多还原

【Abstract】 Systematic change of riser size together with variation of thickness and length of A201 aluminum alloy plate castings were studied to investigate the correlation between mechanical properties and porosity content. The molds with end chill for plate castings were made of 100% silicate sand by CO2 process. If soundness throughout the whole plate casting has to be guaranteed, the riser diameter should be proper design to the dimension of the plate. The tensile strength, elongation and porosity content of A201 aluminum alloy plate casting is governed by riser diameter, thickness, and length of the plate. The more the porosity content, the lower the tensile strength and elongation of plate casting.更多还原