Cu、Mg、Ag元素对Al-Cu-Mn合金铸造性能的影响
Effects of Cu,Mg and Ag Elements on Casting Properties of Al-Cu-Mn Alloy
吴良玉 1陈大辉 1付玉 1张将 1洪晓露 1朱秀荣1
作者信息
- 1. 中国兵器科学研究院宁波分院,宁波 315100
- 折叠
摘要
Al-Cu合金具有较高的力学性能和断裂韧度,但较差的铸造性能限制了其在复杂铸件上的应用.研究了Cu、Mg、Ag元素对Al-Cu-Mn合金铸造性能的影响,以期提高Al-Cu合金的铸造性能.结果表明,在Al-Cu-Mn合金中,Cu含量从5.5%提升至6.5%时,合金的流动性试样长度从598 mm提升至918 mm,热裂倾向显著降低,热裂环宽度从20 mm降至15 mm以下.单独加入Ag时,能够提高合金的流动性但对热裂倾向影响不大.添加Mg、Ag时,形成的低熔点S-Al2CuMg相使合金液的流动性提升,但降低了抗热裂性能.
Abstract
Al-Cu alloy exhibits desirable mechanical properties and fracture toughness.However,poor casting proper-ties limit the application in complex castings.Effects of Cu,Mg and Ag elements on casting properties of Al-Cu-Mn alloys were investigated to improve the casting capacity of Al-Cu alloy.The results indicate that when the Cu content is increased from 5.5%to 6.5%,the flow sample length of the alloy is increased from 598 mm to 918 mm with reduc-tion of hot cracking tendency,and the hot crack ring width is decreased significantly from 20 mm to less than 15 mm.Single Ag addition can improve the fluidity of the alloy,which has little effect on hot cracking tendency.When Mg and Ag are compound added,the low melting point S-(Al2CuMg)phase is formed,enhancing the fluidity of alloy melt and reducing the resistance to hot cracking.
关键词
Al-Cu合金/热裂/流动性/Mg/AgKey words
Al-Cu Alloy/Hot Cracking/Fluidity/Mg/Ag引用本文复制引用
基金项目
基础加强计划重点基础研究项目(2021-173ZD-044)
出版年
2024
NETL
NSTL
万方数据