铸造2011，Vol.60Issue(5)：477-480,4.
Bi对Al-18%Si合金微观组织与力学性能的影响
Effect of Bi on Microstructure and Mechanical Properties of Hyper-Eutectic Al-1 8%Si Alloy
摘要
Abstract
Experiment was carried out to study the effect of different Bi content on microstructure and mechanical properties of hyper-eutectic Al-18％ Si alloy. The results show that most of Bi distributed uniformly and dispersively in the Al-18％Si alloy matrix, only a little Bi aggregation was found; and Bi had a certain modification effect on eutectic Si, with the increasing of Bi content,eutectic silicon transformed from bulky needle-like to short stalk shape, and when addition of Bi reached 3％, eutectic silicon uniformly distributes in the matrix as vermicular patch, and when Bi content was 4％ and 5％, the eutectic Si was not further refined. In addition, the research on mechanical properties and friction show that the tensile strength increased from 168 MPa to 189 MPa when 3％ Bi was added to Al-18％Si alloy, the friction coefficient decreased from 0.437 2 to 0.387 9, and the abrasion loss of alloy is only 20％ of that without Bi.关键词
过共晶Al-18%Si合金/合金元素Bi/微观组织/力学性能Key words
hyper-eutectic Al-18％Si alloy/ alloying element Bi/ microstructure/ mechanical properties分类
矿业与冶金引用本文复制引用
兰晔峰,郭晶,李庆林,王强强..Bi对Al-18%Si合金微观组织与力学性能的影响[J].铸造,2011,60(5):477-480,4.基金项目
兰州市科技攻关项目((2008-1-23). （(2008-1-23）
