【摘要】：通過金相顯微鏡(OM)、掃描電鏡(SEM)、示差掃描量熱法(DSC)和室溫拉伸性能測試等方法,研究固溶處理對新型高強耐熱鋁合金Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd合金組織和力學性能的影響。結(jié)果表明:當固溶溫度由510℃升高到525℃時,更多的初生相回溶至基體;當固溶溫度繼續(xù)升至530℃時,初生相則未進一步回溶,而再結(jié)晶晶粒的尺寸持續(xù)加劇,導(dǎo)致合金軟化程度增加;合金的力學性能由時效強化和固溶軟化共同影響,該合金優(yōu)化的固溶處理制度為525℃、2 h,經(jīng)(525℃,2 h)+(185℃,7 h)峰時效處理后,合金抗拉強度、屈服強度和伸長率分別為608 MPa、587 MPa和10.4%。
[Abstract]:The effect of solution treatment on the microstructure and mechanical properties of a new high strength and heat resistant aluminum alloy Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd alloy was studied by means of metallographic microscope (OM), scanning electron microscope (SEM), differential scanning calorimetry (DSC) and room temperature tensile test. The results show that when the solution temperature increases from 510 鈩，

本文編號：2201228