超声功率对Al-14Mg-7Si合金组织与性能的影响  

Effects of Ultrasonic Power on Microstructure and Performance of Hypereutectic Al-14Mg-7Si Alloy

作　　者：赵志伟[1] 关博文 张栋 Zhao Zhiwei;Guan Bowen;Zhang Dong(School of Materials Science and Engineering,Liaoning University of Technology;Engineering Training Center,Liaoning University of Technology)

机构地区：[1]辽宁工业大学材料科学与工程学院 [2]辽宁工业大学工程训练中心

出　　处：《特种铸造及有色合金》2020年第12期1411-1414,共4页Special Casting & Nonferrous Alloys

摘　　要：研究了不同超声功率对Al-14Mg-7Si合金凝固组织及力学性能的影响。结果发现,当超声功率为600和1000W时,能够细化初生Mg2Si,提高合金的力学性能;当超声波功率达到1400W时,虽然Mg2Si颗粒尺寸更加细小,但由于高频超声处理造成了局部过热,初生Mg2Si相附近出现了高固溶的粗大组织,降低了合金的力学性能。The effects of ultrasonic power on solidification microstructure and mechanical properties of hypereutectic Al-Mg-Si alloy were investigated.The results indicate that the primary Mg2Si can be refined and the mechanical properties of alloy can be enhanced under the ultrasonic treatment with 600Wand 1000W.When the ultrasonic power reaches 1400W,some high solid solution coarse microstructure appears near the primary Mg2Si phase in spite that the size of primary Mg2Si becomes finer,which is attributed to the local overheat caused by high power ultrasonic treatment,resulting in the degradation of mechanical properties.

关 键 词：超声处理 AL-MG-SI合金 MG2SI 晶粒细化 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]