摘要
为了预测GH4169合金热挤压过程中挤压件微观组织的演变规律,本文将微观组织模型加入到模拟软件DE-FORM-3D中,实现了金属高温塑性变形—传热—微观组织演变的耦合。同时研究了不同压下量及应变速率对挤压件微观组织演变的影响。结果表明,挤压件杆部晶粒明显细化,压下量及变形速度对组织演变影响显著。
In order to predict the evolution of microstructure in GH4169 alloy extrusion workpiece, mathematical models for the microstructure evolution of GH4169 workpiece were implemented into DEFORM-3D simulator, then the coupling between thermo-mechanical and microstructure evolution was realized. Meanwhile, the method was used to predict the influence of various height reduction and deformation velocity. The results show that the height reduction and deformation velocity have a strong influence on the mierostructure evolution, and the pole of the workpiece has less grain size.
出处
《锻压技术》
CAS
CSCD
北大核心
2009年第1期161-165,共5页
Forging & Stamping Technology
关键词
挤压
高温合金
微观组织演变
数值模拟
extrusion
high-temperature alloy
microstructure evolution
numerical simulation
