半固态挤压过共晶铝硅铁合金组织与性能的研究  

Study on Microstructure and Properties of Semi-Solid Extruded Hypereutectic Al-Si-Fe Alloy

作　　者：赵树国[1] 曹阳[2] 黄宏军[3] 袁晓光[3] 

机构地区：[1]沈阳航空航天大学,辽宁沈阳110136 [2]沈阳铸造研究所,辽宁沈阳110022 [3]沈阳工业大学,辽宁沈阳110870

出　　处：《铸造》2013年第12期1172-1175,共4页Foundry

摘　　要：采用半固态反挤压成形方式制备了Al-17Si-3Fe-2Mn-4Cu-1Mg-1Ti合金。利用金相显微镜分析了合金铸态、电磁搅拌态、半固态挤压成形态的组织;利用SEM电子显微镜对拉伸断口进行观察。用拉伸试验机对合金铸态和半固态挤压成形态力学性能进行测试。试验结果表明:经过半固态挤压后,合金组织发生了明显细化,第二相长度和厚度减小,同时尖角发生钝化,且分布较均匀,半固态挤压成形后合金抗拉强度达到233.6 MPa,伸长率为1.6%。The Al-17Si-3Fe-2Mn-4Cu-1Mg- 1Ti alloy was prepared by semi-solid backward extruded process. The structure of as-cast, electromagnetic stirring and semi-solid extruding of alloy were analyzed by metallography microscope. Fracture was studied by scanning electronic microscope. Tensile testing machine was used to measure mechanics properties of as-cast and extruded alloy. The results show that compared with the as-cast alloy after extrusion, the structure of alloy obviously refined. The length and thickness of the second phase decreased, the sharp comer change rounding, and distribution becomes more homogeneous. Tensile strength of extruded alloy is 233.6 MPa, and extension percentage can get 1.6%.

关 键 词：半固态成形 AL-SI-FE合金 微观组织 力学性能 

分 类 号：TG379[金属学及工艺—金属压力加工]