摘要
利用超声波处理Al-Cu-Mg-Ag合金熔体,研究了熔体超声处理对其微观组织和硬度的影响。结果表明,相较于未超声处理的铸态合金,熔体超声处理90 s和180 s所得铸态合金硬度分别提升了12.7%和11.2%。熔体超声处理降低了合金成分偏析,加快200℃/2 h时效过程中Ω相的析出。定量分析结果表明:熔体超声处理虽然能减小铸态合金的晶粒尺寸,但细晶强化效果有限;固溶强化和析出强化分别提高了铸态和T6态合金的硬度。
Al-Cu-Mg-Ag alloy melt was treated with ultrasonic waves,and the effect of the ultrasonic melt treatment on the microstructure and hardness of alloy was investigated.The results show that compared to the as-cast alloy without ultrasonic treatment,the as-cast alloy after ultrasonic melt treatment for 90 s and 180 s respectively has its hardness correspondingly improved by 12.7% and 11.2%.The ultrasonic melt treatment can reduce the segregation of alloy composition and accelerate precipitation of Ω phase during 2 h aging process at 200 ℃.A quantitative analysis shows that ultrasonic melt treatment can reduce the grain size of as-cast alloy,but presents limited effect of fine grain strengthening.Solid solution strengthening and precipitation strengthening respectively improve the hardness of as-cast and T6-tempered alloys.
作者
毛盼
王吉祥
柏松
刘志义
MAO Pan;WANG Jixiang;BAI Song;LIU Zhiyi(School of Material Science and Engineering,Central South University,Changsha 410083,Hunan,China)
出处
《矿冶工程》
CAS
北大核心
2024年第6期139-143,共5页
Mining and Metallurgical Engineering
基金
国家自然科学基金面上项目(52071341)
湖南省自然科学基金青年项目(2020JJ5711)。
关键词
AL-CU-MG-AG合金
超声处理
硬度
微观组织
固溶强化
析出强化
T6热处理
Al-Cu-Mg-Ag alloy
ultrasonic treatment
hardness
microstructure
solid solution strengthening
precipitation strengthening
T6 heat treatment
