本文選題：高溫合金　切入點(diǎn)：雙道次　出處：《工程科學(xué)學(xué)報(bào)》2015年03期

【摘要】：采用Gleeble-1500熱模擬試驗(yàn)機(jī)對FGH96合金進(jìn)行雙道次真應(yīng)變量為0.6+0.6和0.3+0.9的等溫間斷熱壓縮試驗(yàn),研究了變形溫度為1050~1125℃、變形速率為0.001~0.1 s-1時(shí)合金的熱變形行為和組織演變.熱變形過程中合金發(fā)生了再結(jié)晶,第一道次較小的真應(yīng)變量減輕了合金的開裂.當(dāng)?shù)谝坏来握鎽?yīng)變量小時(shí),隨著溫度和變形速率的上升,合金道次間再結(jié)晶軟化率增加.不同應(yīng)變量以及不同道次真應(yīng)變量均對合金熱加工圖產(chǎn)生明顯影響.在相同變形條件下,當(dāng)能量耗散率隨應(yīng)變量的增加而下降時(shí),合金中組織由細(xì)晶向粗晶轉(zhuǎn)變,反之則由粗晶向細(xì)晶轉(zhuǎn)變;當(dāng)能量耗散率不隨應(yīng)變量的變化而變化時(shí),能量耗散率低于20%的合金中出現(xiàn)大量的不完全再結(jié)晶組織,能量耗散率高于35%的合金中出現(xiàn)細(xì)小完全再結(jié)晶組織.
[Abstract]:On FGH96 alloy by double pass really should be variable for the 0.6+0.6 and 0.3+0.9 continuous isothermal hot compression test using the Gleeble-1500 thermal simulation testing machine, the deformation temperature of 1050~1125, the deformation rate of 0.001~0.1 S-1 alloy hot deformation behavior and microstructure evolution during hot deformation. The alloy recrystallization occurred, the first. The true strain reduced alloy cracking. When the first true strain hours, with the rise of the temperature and strain rate, alloy Interpass recrystallization softening rate increased. The variables and different pass variables are really should have a significant impact on the processing of the alloy. Different under the same deformation conditions, when the energy dissipation rate increases with the increase of strain decreases when the change in the alloy organized by fine grain to coarse grain, and vice versa by coarse to fine grain change; when the energy dissipation rate does not change with the strain energy. A large number of incomplete recrystallized structures appear in the alloy with a dissipation rate of less than 20%, and the fine and complete recrystallized microstructure appears in the alloy with energy dissipation rate higher than 35%.

【作者單位】： 北京科技大學(xué)材料科學(xué)與工程學(xué)院;北京航空材料研究院;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃資助項(xiàng)目(2010CB631204)
【分類號(hào)】：TG132.3

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本文編號(hào)：1705685