钛合金镦锻过程温度场的有限元模拟  

Simulation of Temperature of Ti Alloy Forging

作　　者：张悦[1] 江萍[2] 

机构地区：[1]鞍山师范学院物理科学与技术学院,辽宁鞍山114007 [2]吉林建筑大学电气与电子信息工程学院,吉林长春130118

出　　处：《鞍山师范学院学报》2013年第4期11-14,共4页Journal of Anshan Normal University

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.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 ahoy end face. The plastic deformation heat can heating up the bil- let. The results in this paper consist with the experimental data and can provide a reference for the processing technology of Ti alloy forging.

关 键 词：钛合金 镦锻 有限元 模拟 

分 类 号：O4-39[理学—物理]