铸造2024，Vol.73Issue(6)：746-752,7.
细化变质对免热处理压铸Al-Zn-Si-Cu合金组织及性能的影响
The Effect of Refinement and Modification on the Microstructure and Properties of Al-Zn-Si-Cu Alloy Die-Casting Without Heat Treatment
摘要
Abstract
Al-Zn-Si-Cu alloy was prepared by die casting process.The effect of ceramic nano-reinforced particles(TiC/TiB2)and Al-l0Sr modifier on mechanical properties,thermal/electrical properties and microstructure of Al-Zn-Si-Cu alloy was studied.The results show that after adding 0.5％ceramic nanoparticles alone,theα-Al phase is obviously refined,showing nearly rose-like shape,the fibrous eutectic Si phase is denser,the short rod-like Al2Cu phase is finer,and the content of Zn,Si and Cu elements in the matrix is increased,and the mechanical properties are improved.The thermal conductivity/electrical properties decreased slightly,mainly due to the increase of solute elements led to a greater degree of lattice distortion,increasing the electron scattering ability while decreasing the mean free path of electrons,resulting in a decrease in the thermal conductivity and electrical conductivity of metals.After the co-action of 0.5％ceramic nanoparticles and 0.1％Al-10Sr,the eutectic Si phase is angular passivated,and the solutes content in the matrix further increases.At this time,the mechanical properties of the alloy reach the best,with the tensile strength,yield strength and elongation of 361 MPa,213 MPa and 6.8％,respectively.Thermal conductivity 118.73 W/(m-K).关键词
免热处理压铸Al-Zn-Si-Cu合金/晶粒细化/变质处理/力学性能/显微组织Key words
die casting Al-Zn-Si-Cu alloy without heat treatment/grain refinement/deterioration treatment/mechanical properties/microstructure分类
信息技术与安全科学引用本文复制引用
张恩图,郝建飞,夏鹏,陈斌,王志鹏,揭晓华,李润霞..细化变质对免热处理压铸Al-Zn-Si-Cu合金组织及性能的影响[J].铸造,2024,73(6):746-752,7.基金项目
广东省基础与应用基础研究基金区域联合基金重点项目(2022B1515120066) （2022B1515120066）
广东省重点建设学科科研能力提升项目(2022ZDJS030) （2022ZDJS030）
国家自然科学基金专家推荐类原创探索计划项目(12150001) （12150001）
东莞市科技特派员项目(20221800500773). （20221800500773）
