铸造技术2018，Vol.39Issue(6)：1153-1156,1160,5.DOI:10.16410/j.issn1000-8365.2018.06.002
Sr对AlSi9Cu3合金组织与力学性能的影响
Effect of Sr on Microstructure and Mechanical Properties of AlSi9Cu3 Alloy
摘要
Abstract
The effects of different Sr content on mechanical properties and microstructure of AlSi9Cu3 alloy were investigated.The results show that when the Sr content is 0.06 ％, the modification effect of the alloy is the best, and the eutectic silicon phase of the alloy is transformed from a thick needle and flake to a small fibrous or particles.However, excessive Sr may cause the increase of casting defects such as porosity.With the increase of Sr content, the mechanical properties of the alloy show a trend of first increase and then decrease.When the Sr content is 0.06 ％, the reinforcement effect of the alloy is up to peak, the ultimate tensile strength and elongation reach 288 MPa and 13.23 ％, respectively.The strong-plasticity properties of the alloy will be decreased with adding more Sr, which is consistent with the effect of Sr on the modification effect of eutectic Si.关键词
AlSi9Cu3合金/Sr含量/微观组织/力学性能Key words
AlSi9Cu3 alloy/Sr content/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
汪闵,赵玉涛,陶然,印厚尚,杨永刚..Sr对AlSi9Cu3合金组织与力学性能的影响[J].铸造技术,2018,39(6):1153-1156,1160,5.基金项目
国家自然科学基金资助项目(U1664254,U51174098) （U1664254,U51174098）
