有色金属科学与工程2018，Vol.9Issue(3)：17-21,5.DOI:10.13264/j.cnki.ysjskx.2018.03.004
低温时效对QBe2.0铍青铜组织与性能的影响
Effects of low temperature aging on the microstructure and properties of QBe2.0 alloy
摘要
Abstract
The microstructure and properties of QBe2.0 alloy aging at the temperature of 280℃were investigat-ed. The room temperature tensile test, hardness testing and conductivity test were performed to measure the properties of the alloy, while the OM, XRD, TEM and other methods were used to analyze the microstructure. The results showed that with the prolonging of aging time, the hardness, yield strength and tensile strength of the alloy continue to increase, reaching the peak aging state at 8 h. The main strengthening phase was the γ' phase in the matrix in the form of amplitude-modulated structure. Since the lattice distortion was caused by coherent precipitated phase of γ'', the conductivity of the alloy first decreased and then increased with the ag-ing time. After 16 hours, the alloy reached the over-aged state. It was obvious to find that the discontinuous precipitation widely appeared at grain boundary and small amount of γ phase was detected in XRD pattern. Both two factors deteriorated the mechanical properties of the alloy.关键词
QBe2.0铍青铜/时效/电导率/力学性能/微观组织Key words
QBe2.0 alloy/aging/conductivity/mechanical property/microstructure分类
矿业与冶金引用本文复制引用
王晶莉,岳丽娟,闫永,吴文博,寻坚,林高用..低温时效对QBe2.0铍青铜组织与性能的影响[J].有色金属科学与工程,2018,9(3):17-21,5.基金项目
国家重点研发计划资助项目(2016YFB0301300) （2016YFB0301300）
中南大学研究生创新资助项目(2016zzts263) （2016zzts263）
中南大学大学生米塔尔创新资助项目(201610533029) （201610533029）
