材料科学与工程学报2025，Vol.43Issue(1)：23-30,8.DOI:10.14136/j.cnki.issn1673-2812.2025.01.004
ZL205A合金热处理参数优化及其组织性能演变
Optimization of Heat Treatment Parameters and Evolution of Microstructure and Properties of ZL205A Alloy
摘要
Abstract
ZL205A alloy is an important cast aluminum alloy in aerospace field.Heat treatment is the key to improve the comprehensive mechanical properties of ZL205A alloy.The effects of solid solution and aging parameters on the microstructure and mechanical properties of ZL205A alloy were studied by 530℃×2 h+540℃×13 h solid solution+165℃×6 h again.Laser confocal microscope(CLSM),X-ray diffraction(XRD),scanning electron microscope(SEM)and field emission transmission electron microscope(Field emission transmission electron microscope,TEM)were used to detect the microstructure and mechanical properties of the materials under different heat treatment systems,and the correlation effect between microstructure mechanism and mechanical properties was analyzed.The results show that 530℃×2 h+540℃×13 h is a better two-stage solid solution system.After solution treatment,the reticulated eutectic structure in the as-cast alloy dissolves,the microstructure uniformity of the alloy is improved,and the microstructure of the alloy is improved.During low temperature aging,θ'nanometer precipitates are discontinuously distributed on the grain boundary,and the increase of temperature will lead to the coarsening and increase of θ'phase,and the stable θ'phase can effectively hinder the dislocation movement and improve the mechanical properties of the alloy.关键词
ZL205A合金/微观组织/力学性能/固溶/纳米析出相Key words
ZL205A alloy/Microstructure/Mechanical properties/Solution/Nano precipitation phase分类
金属材料引用本文复制引用
郭廷彪,钱丹晨,王炳,王楠,丁万武,金玉花..ZL205A合金热处理参数优化及其组织性能演变[J].材料科学与工程学报,2025,43(1):23-30,8.基金项目
甘肃省省科技重点研发计划项目(20YF8GA056) （20YF8GA056）
甘肃省重大科技专项项目(1302GKDA015) （1302GKDA015）
