(1. 南昌航空大學(xué) 輕合金加工科學(xué)與技術(shù)國防重點(diǎn)學(xué)科實(shí)驗(yàn)室，南昌 330063；
2. 中國南方航空工業(yè)(集團(tuán))有限公司，株洲 412002)
摘 要: 結(jié)合拉伸力學(xué)性能測試，采用光學(xué)顯微鏡(OM)、掃描電鏡(SEM)、透射電鏡(TEM)及能譜分析儀(EDS)，研究淬火水溫對ZL210A合金顯微組織、拉伸斷口形貌及力學(xué)性能的影響。結(jié)果表明：隨淬火水溫的升高，析出相不斷聚集長大，晶粒內(nèi)空白區(qū)域增大，無沉淀析出帶變寬；合金的拉伸斷口都存在明顯的尺寸不等的韌窩，淬火水溫為50 ℃的試樣的拉伸斷口韌窩尺寸較大且深，試樣塑性較好；合金的抗拉強(qiáng)度、屈服強(qiáng)度、硬度和伸長率都隨淬火水溫的升高先增加后減少；當(dāng)淬火水溫為50 ℃時，合金的抗拉強(qiáng)度、屈服強(qiáng)度、硬度和伸長率達(dá)最大值分別為477 MPa、363 MPa、149 HV和3%。
關(guān)鍵字: ZL210A合金；淬火水溫；顯微組織；力學(xué)性能；斷口形貌
（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
