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基于GH4738合金的热流变应力模型及晶粒组织演变模型,提出并实现了利用Deform3DTM软件对该合金涡轮盘从自由锻前预热直至模锻完成的整个锻造过程的集成式模拟.借助集成式模拟实现了对锻件在整个锻造过程中温度、平均晶粒尺寸等参数的定量控制.同时采用直径300mm涡轮盘的实际锻造结果验证了所用模型和该模拟方法的可靠性.最后,把集成式模拟运用于直径1450mm涡轮盘盘件的锻造过程模拟,并根据模拟优化方案在8×104t锻压机下成功锻制直径1450 mm涡轮盘盘件.为大型变形高温合金涡轮盘的锻造成型提供了工艺优化的理论依据和研究方法.
Based on the heat flow stress model and the evolution model of grain structure of GH4738 alloy, an integrated simulation of the entire forging process of the alloy turbine disk from preheating before forging to forging forging was proposed and implemented with Deform3DTM software. With integrated simulation The quantitative control of the forging temperature and the average grain size during the forging process was realized.The reliability of the model and the simulation method was verified by the actual forging results of the 300mm diameter turbine disk.Finally, The forging process of the 1450 mm diameter turbine disk was simulated and the 1450 mm diameter disk was successfully forged under the 8 × 104t forging press according to the simulation and optimization plan.The process optimization was provided for the forging of large deformation superalloy disk Theoretical basis and research methods.