高Nb--TiAl合金叶片锻造模拟  

Forging simulation of blades of a high niobium containing Ti Al based alloy

作　　者：辛景景 张来启[1] 马向玲[1] 林均品[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《工程科学学报》2016年第4期532-537,共6页Chinese Journal of Engineering

基　　金：北京市自然科学基金资助项目(2162024);国家重点基础研究发展计划资助项目(2011CB605502)

摘　　要：采用Deform-3D有限元软件模拟β-γ高Nb-Ti Al合金叶片等温锻造,分析等效应变场、等效应力场与温度场的分布.叶片等温锻造中叶身与榫头的等效应变分布均匀,随着上模具压下速度的增大和预热温度的升高,变形过程中等效应力降低,有利于动态再结晶的发生;上模具压下速度在1.0~1.5 mm·s-1、预热温度在1250~1300℃有利于提高β-γ高Nb-Ti Al合金叶片锻件的质量.The isothermal forging process of blades of a β- γ high niobium containing Ti Al based alloy was simulated by using a Deform-3D software,with focus on the analysis of the effective strain,effective stress and temperature distributions. The results demonstrate that the effective strains of the blade body and rabbet uniformly distribute during the isothermal forging process. With the increase of top die speed and preheating temperature,the effective stress decreases and the dynamic recrystallization is easy to take place. The preheating temperature of 1250-1300 ℃ and the top die speed of 1. 0-1. 5 mm·s- 1help to improve the quality of the forged blades.

关 键 词：钛铝合金 铌 叶片 等温锻造 计算机模拟 

分 类 号：TG316.3[金属学及工艺—金属压力加工]