_粉末冶金8-07.pdf

2007 中国钢铁年会论文集 双性能粉末高温合金涡轮盘梯度 热处理的温度场模拟 田高峰 1 贾成厂 1 吴 凯 1 刘建涛 2 胡本芙 1 （1. 北京科技大学材料科学与工程学院，北京 100083; 2. 钢铁研究总院高温材料研究所，北京 100081 ） 摘 要 高速喷气式飞机上使用的高推重比发动机涡轮盘要求承受较高的工作温度、较长的服役寿命和具有廉价的 成本。轮毂为细晶组织、轮缘为粗晶组织的双重组织（双性能）涡轮盘是涡轮盘制造技术的主要发展方向。本文采 用有限元的方法，建立一个简化的涡轮盘模型，对FGH4096 合金涡轮盘梯度热处理的温度场进行了数值模拟，讨 论了各种因素对涡轮盘温度场分布的影响。结果表明，采用上述的梯度热处理模型完成双晶粒组织是可行的，在涡 轮盘尺寸一定的情况下，炉温对盘坯的温度梯度影响不大，而换热系数和保温时间对其有较大影响，保温时间越长， 换热系数越大，盘坯温度梯度越平缓。 关键词 涡轮盘 双性能 数值模拟 梯度热处理 Temperature Field Simulation for Dual-property P/M Superalloy Turbine Disk Subjected to Gradient Heat Treatment Tian Gaofeng1 Jia Chengchang1 Wu Kai1 Liu Jiantao2 Hu Benfu1 （1. School of Materials Science and Engineering, USTB, Beijing, 100083; 2. High Temperature Materials Research Institute, CISRI, Beijing, 100081 ） Abstract The higher temperature capability, the longer service life and the lower cost are requested for turbine disk in gas advanced engine with a higher thrust/weight ratio for jet aircraft. The dual-property turbine disk possesses a fine grain bore and coarse grain rim is a main development direction in manufacturing technologies of turbine disks. A simplified model was built to simulate the temperature field of FGH4096 superalloy turbine disk when it was subjected to gradient heat treatment, the effects of various factors on temperature field were investigated in this paper. The results show furnace temperature affects little on the temperature field of a certain size of turbine disk, while synthesis coefficient of heat transfer and heat treatment time affect it to a great extent. Key words turbine di