高合金化Al-8Zn-2Mg-2Cu合金均匀化退火制度研究
Study on homogenizing annealing system of high-alloying Al-8Zn-2Mg-2Cu aluminum alloy
张祥斌 1任伟才 1王凤春 1李艺萌 1刘长琳 1王金花 1宋阳 1刘云龙1
作者信息
- 1. 东北轻合金有限责任公司,黑龙江哈尔滨 150060
- 折叠
摘要
研究了不同单级均匀化退火制度对高合金化Al-8Zn-2Mg-2Cu合金组织的影响.通过对第二相及共晶组织的演化规律分析获得了合金较为理想的单级均匀化退火制度.组织分析发现,Al-8Zn-2Mg-2Cu合金中第二相主要为片层状的T(AlZnMgCu)相,以及片层间与T(AlZnMgCu)相共生的Al2CuMg相,过烧温度为476 ℃.在465、470、475℃三种温度下开展的单级均匀化退火处理研究结果表明,在过烧温度下进行单级均匀化退火处理很难将共晶组织完全消除.本研究确定的较为理想的均匀化退火制度为475 ℃96 h,在此制度下的第二相残留数量最少、形貌圆滑,且共晶组织体积分数最低为0.5％.
Abstract
High-alloying Al-8Zn-2Mg-2Cu aluminum alloy was investigated with different single-stage homogenizing annealing systems.An ideal system was obtained by analyzing the evolution laws of the second phase and eutectic structure.Structure analysis show that the second phase is mainly the layered T(AlZnMgCu)phase and the Al2CuMg phase coexisting with T(AlZnMgCu)between the layers.The overburning temperature is 476 ℃.Different single-stage homogenizing annealing were conducted at 465 ℃,470 ℃,and 475 ℃,re-spectively.The results indicate that it is difficult to completely eliminate the eutectic struc-ture at the overburning temperature.The resulted ideal system is 475 ℃96 h,in which the residual amount of the second phase is minimum,the morphology is smooth,and the volume fraction of the eutectic structure is the lowest at 0.5％.
关键词
单级均匀化退火/高合金化/Al-8Zn-2Mg-2Cu合金/第二相/共晶组织Key words
single-stage homogenizing annealing/high alloying/Al-8Zn-2Mg-2Cu alloy/second phase/eutectic structure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据