重型燃机压气机盘淬火过程的数值模拟与工艺优化

Numerical Simulation and Technical Optimization of Gas Turbine Compressor Disk Quenching Process

通过建立合适的有限元模型，模拟研究了重型燃机压气机盘在不同淬火介质中淬火时的温度变化，把计算得到的冷却曲线与CCT图中的冷却曲线进行比较，来判断压气机盘淬火时的组织转变。模拟计算结果表明，在不同的淬火介质中冷却，均可得到全马氏体组织。但在空气中冷却时，由于温差较小，淬火应力也较小，因而淬火变形和开裂的倾向性较小。由此提出在空气中冷却的淬火工艺方案，并在实际生产中得到了成功运用。

Based on Finite Element Method （FEM）, the temperature variations of gas turbine compressor disk during quenching in different quenchants were studied. The microstructure variations of compressor disk in quenching process were decided by comparing computed cooling curves with the cooling curves in CCT diagram. The simulated results show that the martensite microstructure can be obtained all over the whole disk after quenching in different quenchants. However, the quenching stress and the possibility of distortion and cracking is less due to the smaller temperature difference during quenching process in air. As a result, the optimized quenching scheme of cooling in air was put forward, which has been successfully adopted in practice.