本文選題：A鋁合金　切入點(diǎn)：雙級(jí)固溶　出處：《熱加工工藝》2017年04期 　論文類型：期刊論文

【摘要】：通過拉伸試驗(yàn)、金相觀察、掃描電鏡、透射電鏡等手段研究了不同雙級(jí)固溶處理對(duì)2A14鋁合金力學(xué)性能及組織的影響。結(jié)果表明:雙級(jí)固溶獲得了較高程度的過飽和固溶體,僅發(fā)生了部分再結(jié)晶;最佳雙級(jí)固溶工藝為:470℃×2 h+510℃×1 h,采用該工藝并經(jīng)160℃×8 h時(shí)效后,合金的拉伸力學(xué)性能達(dá)到σb=508.4 MPa,σ0.2=422.7 MPa,δ=14.9%;經(jīng)雙級(jí)固溶后,Al2Cu相已基本完全溶解,未溶相主要為富含F(xiàn)e、Si的雜質(zhì)相,其拉伸斷口呈現(xiàn)出典型的韌窩型斷裂;時(shí)效后合金中的主要強(qiáng)化相為S′相,且在470℃×2 h+510℃×1 h二級(jí)固溶并時(shí)效后的析出相較單級(jí)固溶的數(shù)量更多且細(xì)小均勻,因而獲得了更高的析出強(qiáng)化效果。
[Abstract]:The effects of different two-stage solution treatment on mechanical properties and microstructure of 2A14 aluminum alloy were studied by means of tensile test, metallographic observation, scanning electron microscope and transmission electron microscope. The results showed that a high degree of supersaturated solid solution was obtained by two-stage solution. Only partial recrystallization occurred, and the optimum two-stage solution process was: W 470 鈩，

本文編號(hào)：1639735