【摘要】 使用Gleeble 3800试验机对铸态Inconel 625合金进行了一系列条件的热压缩实验,根据动态材料模型建立了热加工图,并结合真应力-真应变曲线及微观组织,分析了合金在不同条件下的变形机制。结果表明:对铸态625合金,1273~1363K,0.1~5.05s-1为动态回复区;1363~1453K,0.1~5.05s-1为不充分动态再结晶区;1400~1453K,5.05~10s-1为完全动态再结晶区。该合金在0.1~10s-1变形时,发生动态再结晶的临界温度在1373~1423K之间,临界应变在0.4~0.6之间。Inconel 625合金不发生失稳流变的条件范围为1400~1453K,5.05~10s-1。更多还原

【Abstract】 Gleeble 3800testing machine was used to conduct a series of compression tests of cast alloy Inconel 625.Then thermal processing map was developed based on dynamic material model(DMM),which was used to analyze the hot deformation mechanism with the combination of true stress-true strain curve and microstructure.The results show that,for cast alloy 625,1273-1363K,0.1-5.05s-1is the dynamic recovery(DRV)domain,1363-1453K,0.1-5.05s-1 is the partly dynamic recrystallization(DRX)domain and 1400-1453K,5.05-10s-1 is the completely dynamic recrystallization domain.When it is deformed at 0.1-10s-1,the critical temperature of DRX is between 1373Kand 1423Kand the critical strain is between 0.4and 0.6.The conditions without flow instability are 1400-1453K,5.05-10s-1.更多还原