Cu-1Mg-1V合金的组织及性能
(1. 沈阳工业大学 材料科学与工程学院，沈阳110023；
2. 辽宁工程技术大学 材料科学与工程系，阜新 123000)
摘 要: 采用喷射沉积快速凝固技术制备了Al-17Si-5Fe-2Mn-2Ni-3.5Cu-1Mg-1V合金，利用金相、X射线衍射和SEM等测试方法分析了合金的组织特征、热稳定性及力学性能。结果表明：喷射沉积合金的组织由大量弥散分布的粒状相、少量块状相和共晶基体组成。挤压态合金经300 ℃不同时间加热后，初晶Si相没有明显的粗化，热稳定性良好；合金经热挤压后，室温极限拉强度达232.2 MPa，经T6热处理后极限抗拉强度提高了17%，达271.3 MPa。
关键字: Al-Si合金；显微组织；喷射沉积；热稳定性；力学性能
Al-17Si-5Fe-2Mn-2Ni-3.5Cu-1Mg-1V alloy
（1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China;
2. Department of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China）
Abstract:Al-17Si-5Fe-2Mn-2Ni-3.5Cu-1Mg-1V alloy was prepared by spray-deposition technology, a kind of rapid solidification. The microstructure, thermal stability and mechanical properties were investigated by optical microscopy, XRD and SEM. The results show that the microstructures of alloy are composed of lots of dispersed granular phases, block like phases and eutectic matrixes. The hypereutectic Si phase is coarsened evidently and the thermal stability of the alloy is good when the extruding alloys are heattreated at 300 ℃ for different time. The ultimate tensile strength of the as-extruded alloy is 232.2 MPa at room temperature, and the value reaches 271.3 MPa after T6 process, which is increased about 17% than that of the former.
Key words: Al-Si alloy; microstructure; spray-deposition; thermal stability; mechanical properties
