(1. 南昌航空大学 轻合金加工科学与技术国防重点学科实验室，南昌 330063；
2. 中国南方航空工业(集团)有限公司，株洲 412002)
摘 要: 结合拉伸力学性能测试，采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)及能谱分析仪(EDS)，研究淬火水温对ZL210A合金显微组织、拉伸断口形貌及力学性能的影响。结果表明：随淬火水温的升高，析出相不断聚集长大，晶粒内空白区域增大，无沉淀析出带变宽；合金的拉伸断口都存在明显的尺寸不等的韧窝，淬火水温为50 ℃的试样的拉伸断口韧窝尺寸较大且深，试样塑性较好；合金的抗拉强度、屈服强度、硬度和伸长率都随淬火水温的升高先增加后减少；当淬火水温为50 ℃时，合金的抗拉强度、屈服强度、硬度和伸长率达最大值分别为477 MPa、363 MPa、149 HV和3%。
关键字: ZL210A合金；淬火水温；显微组织；力学性能；断口形貌
（1. National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,
Nanchang Hangkong University, Nanchang 330063, China;
2. Southern China Aviation Industry (Group) Co., Ltd., Zhuzhou 412002, China）
Abstract:The effect of quenching water temperature on the microstructure,fracture morphology and mechanical properties of ZL210A alloy was studied by tensile tests, optical microscopy, scanning electron microscopy, transmission electron microscopy and energy spectrum analysis.The results show that, with increasing the quenching water temperature, the precipitate phase tends to grow up, and many blank areas in the grain expand, the precipitation free zones become wider. All the tensile fractures have some dimples with different sizes, when the quenching temperature is 50 ℃, the dimple size is large and deep. The samples have a good plasticity. The tensile strength, yield strength, hardness and elongation of samples increase first and then decrease as the quenching water temperature rises, when the quenching water temperature is 50 ℃, the peak values of tensile strength, yield strength, hardness and elongation are 477 MPa, 363 MPa, 149 HV and 3%, respectively.
Key words: ZL210A alloy; quenching water temperature; microstructure; mechanical property; fracture morphology
