摘要
采用喷射沉积快速凝固技术制备了Al-17Si-4Fe-2Mn-3Ni-3.5Cu-1Mg合金,利用金相、XRD、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。合金在150、250、350℃下不同时间加热后,初晶Si没有明显的粗化。证明其在350℃下具有良好的热稳定性。合金经热处理后,室温抗拉强度达373MPa。
Microstructure,thermal stability and mechanical properties of spray-deposited prepared Al-17Si-4Fe-2Mn-3Ni-3.5Cu-1Mg alloy were investigated by OM(optical microscope),XRD(X-ray diffraction) and SEM(scanning electron microscope).The results reveal that the microstructure of the alloy is composed of lots of dispersed granular phase,a little block-like phase and eutectic matrix.Obvious coarseness of primary Si phase can not be observed in the alloy with different heating time at 150℃,250℃ and 350℃,respectively,which verifies that the alloy exhibits desirable thermal stability at below 350℃.Ultimate tensile strength of the as-extruded alloy after T6 treatment reaches 373MPa at room temperature.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第11期1050-1053,共4页
Special Casting & Nonferrous Alloys
