超声处理原位自生Mg<sub>2</sub>Si/AZ91复合材料的工艺优化

崔策; 尧军平; 张磊

doi:10.15980/j.tzzz.2016.06.021

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超声处理原位自生Mg₂Si/AZ91复合材料的工艺优化
Optimum Design of Ultrasonic Treatment of In-Situ Mg₂Si/AZ91 Composites
2016年36卷第6期页码：631-633
纸质出版日期： 2016 ，
DOI： 10.15980/j.tzzz.2016.06.021

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[1]崔策,尧军平,张磊.超声处理原位自生Mg_2Si/AZ91复合材料的工艺优化[J].特种铸造及有色合金,2016,36(06):631-633.

Cui Ce, Yao Junping, Zhang Lei. Optimum Design of Ultrasonic Treatment of In-Situ Mg₂Si/AZ91 Composites[J]. Special Casting & Nonferrous Alloys, 2016,36(6):631-633.
[1]崔策,尧军平,张磊.超声处理原位自生Mg_2Si/AZ91复合材料的工艺优化[J].特种铸造及有色合金,2016,36(06):631-633. DOI： 10.15980/j.tzzz.2016.06.021.

Cui Ce, Yao Junping, Zhang Lei. Optimum Design of Ultrasonic Treatment of In-Situ Mg₂Si/AZ91 Composites[J]. Special Casting & Nonferrous Alloys, 2016,36(6):631-633. DOI： 10.15980/j.tzzz.2016.06.021.

摘要

研究了超声功率、超声处理时间和超声处理温度对原位自生Mg2Si/AZ91复合材料性能的影响

并设计正交试验优化工艺。结果表明

超声处理后的复合材料铸态组织中

基体晶粒细化明显

初生Mg2Si相由粗大块状转变为近球状

共晶β-Mg17Al12相析出较少

并呈断网状。当超声处理温度为690℃、超声功率为700 W、超声处理为65s时

复合材料的抗拉强度和伸长率最佳

抗拉强度由未超声处理时的167 MPa提高至209 MPa

伸长率由未超声处理时的1.8%提升至超声处理后的3.4%

分别提升了25%和89%。

Abstract

The effects of ultrasonic power

ultrasonic treatment time and temperature on properties of insitu Mg2Si/AZ91 composites were investigated

and orthogonal experiment was designed to optimize process.The results reveal that ultrasonic treatment can refine obviously as-cast microstructure of the composites

and the morphology of primary Mg2 Si phases is converted from chunk to fine particle

and a little eutecticβ-Mg17 Al12 phase is precipitated with dis-continuous net-like structure.The tensile strength and elongation of the composite exhibit desirable when the ultrasonic treatment temperature is690 ℃and ultrasonic power is 700 Was well as ultrasonic treatment for 65 s.The tensile strength is increased from 167 MPa to 209 MPa

and the elongation is increased form 1.8%to 3.3% after ultrasonic treatment

increased by 25% and 89%

respectively.