基于数值仿真的整体叶盘锻造变形规律分析

Analysis of blisk forging deformation regularity based on numerical simulation

采用FORGE数值仿真软件对钛合金整体叶盘锻造工艺进行模拟,分析了温度、应力、应变和等效应变速率对锻件的影响,并对打击次数进行优化。针对该锻件水浸超声检测不合格问题,重点分析了不合格区域等效应变与等效应变速率变化对探伤结果的影响。研究表明,在一次打击成形时能有效控制金属流动和填充,且温度变化小,能够显著降低成形力;等效应变与等效应变速率的变化对锻件内部微观组织产生一定的影响,进而影响锻件芯部超声探伤结果。

The forging process of Ti alloy blisk was simulated by using the FORGE software. The influences of temperature, stress, strain and effective strain rate on forging blisk were analyzed, and the number of hits was optimized. Aiming at the ultrasonic testing problem of this forging blisk, the influences of effective strain and effective strain rate on ultrasonic testing result were studied emphatically. The results showed that the material flow and die filling capability can be effectively controlled during one - time hit. Meanwhile, the form- ing load was decreased obviously and the temperature changed a little. In addition, the ef- fective strain and the effective strain rate have a certain impact on the microstructure, thereby affects the ultrasonic testing result of the forging.