【摘要】 钛合金热加工窗口比较狭窄,通常热加工工艺很难同时满足各参数要求.本文采用刚塑性有限元法,通过钛合金锭坯镦粗过程进行了有限元模拟,重点分析了锭坯各部分温度的变化规律,尤其是中心区域的温升规律.结果表明:表面散热仅影响锭坯表面有限的范围,整体影响较小;锤头的热传导对锭坯的端面温降影响较大,但区域范围较小,应避免锤头与锭坯的长时间接触;塑性变形热在锭坯中心区域会产生比较大的温升,有可能导致过热,应考虑制定停顿工艺设计,以避免破坏性温升的发生.本文模拟结果可以为钛合金镦粗工艺设计提供参考.更多还原

【Abstract】 Since the hot processing windows of Ti alloys are narrow,the common hot working process is difficult to satisfy all requirements.The upset process of Ti60 alloys is investigated using thermal-mechanical coupled simulations based on the rigid- plastic finite element method.The temperature distribute is detail discussed.It was found that the surface heat dispersing had few influence on temperature drop of alloy; the forging hammer had strong influence on temperature drop of alloy end face.The plastic deformation heat can heating up the billet.The results in this paper consist with the experimental data and can provide a reference for the processing technology of Ti alloy forging.更多还原