發(fā)布時(shí)間：2018-07-22 19:11

【摘要】：研究了雙重退火熱處理對(duì)經(jīng)不同的拉伸條件變形后的TC4-DT鈦合金組織的影響。結(jié)果表明:雙重退火后得到的組織與拉伸變形條件和第一重退火溫度有關(guān)。當(dāng)經(jīng)最佳的應(yīng)變速率5.6×10-4s-1和變形溫度920~980℃變形后,隨第一次退火溫度升高,顯微組織中次生α相析出量增加;在980℃變形后,經(jīng)過雙重退火后的合金組織可以得到編織緊密的網(wǎng)籃組織,且第一重退火溫度在β單相區(qū)時(shí)得到的網(wǎng)籃組織的針狀α相更加細(xì)長。當(dāng)經(jīng)最佳的變形溫度940℃和不同的應(yīng)變速率5.6×10-2~5.6×10-4s-1變形后,經(jīng)過930℃/1 h AC+540℃/4 h AC雙重退火的組織可以得到雙態(tài)組織,而經(jīng)過980℃/1 h AC+540℃/4 h AC雙重退火的組織為魏氏組織。
[Abstract]:The effect of double annealing heat treatment on the microstructure of TC4-DT titanium alloy deformed under different tensile conditions was studied. The results show that the microstructure obtained after double annealing is related to the tensile deformation condition and the first annealing temperature. When the optimum strain rate is 5. 6 脳 10-4s-1 and the deformation temperature is 920 ~ 980 鈩，

本文編號(hào)：2138290