某汽轮机叶片材料热变形行为及锻坯参数优化  

Thermal deformation behavior of turbine blade material and blank manufacturing parameter optimization

作　　者：钟杰[1] 李华峰[1] 肖艳红[1] 郭成[1] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《锻压技术》2012年第2期1-5,共5页Forging & Stamping Technology

摘　　要：为提高某叶片锻件质量和生产效率、减少模具磨损,采用热模拟试验研究了叶片材料的热变形行为,建立了材料的高温流动应力方程;以此方程作为材料模型,对叶片的锻造过程进行了数值模拟,优化了制坯工艺参数。试验分析表明,该材料热变形行为符合双曲正弦函数关系;数值模拟结果表明,采用叶根与叶冠成40°角的坯料较优,成形质量与成形载荷对坯料各参数的敏感性不同;试模结果表明,坯料的综合优化可以显著提高成形质量和生产效率。该项研究工作对提高叶片生产技术水平具有重要指导意义。To enhance a turbine blade＇s forging quality and production efficiency, reduce the mold abrasion, the ther- mal deformation behavior of its material was researched and a high temperature constitutive equation of the material was established which were based on a thermal simulation experiment. Using the established equation, the forging process was simulated in the way of orthogonal test and the blank parameters were optimized. The result of thermal simulation experiment shows that this material follows hyperbolic-sine function when it is forged. The forging simulation shows that ifs better to use a blank of 40 degree between the tip and root and there is a difference of sensitivity coefficient on factors between forging quality and die load. Forging test shows that forging quality and production efficiency can be improved with optimization of blank. This research shall be an important reference for blade production.

关 键 词：汽轮机叶片 流动应力方程 数值模拟 制坯 

分 类 号：TG316[金属学及工艺—金属压力加工]