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除气(去氢)和晶粒细化,是增强Al-Si合金综合力学性能的主要措施。超声波处理因其独特的声学效果,使其在金属凝固过程中对除气与细化晶粒都有较好作用。结果表明,施振功率是影响除气及晶粒细化效果的主要因素,而目前的研究多是基于PZT(压电陶瓷)换能器进行的,由于施振功率较小,所以对基于振动技术实现Al-Si合金增强性能机理的研究有一定的局限性。超磁致伸缩材料由于有更大的功率密度及良好的控制特性,基于超磁致伸缩换能器增强铸造Al-Si合金力学性能的研究可为进一步提高铸造Al-Si合金力学性能提供新途径。
Degassing (dehydrogenation) and grain refinement are the main measures to enhance the comprehensive mechanical properties of Al-Si alloys. Ultrasonic treatment due to its unique acoustic effect, so that the metal in the solidification process of degassing and grain refinement have a better effect. The results show that the power of vibration is the main factor affecting the degassing and grain refinement. However, the current researches are mainly based on PZT (piezoelectric ceramic) transducers. Because of the small vibrational power, Technology to achieve Al-Si alloy enhanced performance mechanism of the study has some limitations. Giant Magnetostrictive Materials Due to the greater power density and good control properties, the study on the mechanical properties of Al-Si alloys reinforced by Giant Magnetostrictive Transducers provides a new way to further improve the mechanical properties of Al-Si alloys .