摘要
对比研究了未处理、超声处理、Zr处理以及Zr-超声复合处理对长周期结构增强Mg-5Y-2.5Zn-1.2Ca合金凝固组织和压缩性能的影响,同时考察了复合处理条件下超声功率和处理时间对合金组织与力学性能的影响。结果表明,超声处理、Zr处理和复合处理均能改善Mg-5Y-2.5Zn-1.2Ca合金的凝固组织和力学性能,其中复合处理效果最好,合金的压缩强度和压缩率分别较未处理时提高了15.3%和15.7%。在0~900W范围内,随着超声功率增加,合金的初生相先细化后粗化,转折点为700W;在0~90s范围内,随着超声处理时间增加,合金的初生相先细化后粗化,转折点为60s。晶粒尺寸越小,合金的第二相分布越均匀,合金的抗压强度越高。
Effects of untreated,ultrasonic,Zr modification,compound treatment of Zr and ultrasonic were investigated on solidified structure and compressive properties of Mg-5Y-2.5Zn-1.2Ca alloy enhanced by long period structure.Effects of ultrasonic power and processing time on the alloy with compound treatment were also analyzed.The results show that ultrasonic treatment,Zr treatment and compound treatment can all improve solidified structure and mechanical properties of the alloy,among which the compound treatment has the satisfied effect.Compared with those of the untreated alloy,the compressive strength and the compressive rate of the alloy with compound treatment are increased by 15.3%and 15.7%,respectively.With the increase of ultrasonic power in the range of 0~900W,primary phase in the alloy is refined at first and then coarsened,and the turning point is 700W.In the range of 0~90s,with the increase of ultrasonic processing time,primary phase in the alloy is refined at first and then coarsened,and the turning point is 60s.With decreasing in the grain size,the distribution of the second phase is presented more uniform,and the compressive strength is increased.
作者
李鹏
周全
陈舸
陈乐平
谢东原
Li Peng;Zhou Quan;Chen Ge;Chen Leping;Xie Dongyuan(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University;Shanghai Spaceflight Precision Machinery Institute)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第12期1418-1422,共5页
Special Casting & Nonferrous Alloys
基金
上海航天科技创新基金资助项目(SAST2019-130)。
作者简介
第一作者:李鹏,男,1994年出生,硕士研究生,南昌(330063),电话:17807059620,E-mail:649527720@qq.com;通信作者:周全,男,1976年出生,教授,南昌(330063),电话:13317053857,E-mail:lgclzq@sina.com。
