摘要
某发动机用GH4169合金涡轮轴转动锻件由轴部和盘部两部分组成,考虑采用两步锻造法进行生产。首先采用快锻+精锻生产出满足技术要求的轴部并得到模锻阶段用的毛坯；然后利用模锻进行盘部的成形。重点对该方法中需采取的特殊模锻坯料形状进行了分析,并利用Deform3D有限元模拟软件确定了成形可行性。在加热温度和终锻温度的控制上,为保证轴部和盘部获得各自所需的组织和力学性能,在精锻和模锻过程中分别采取了不同工艺制度。经试验开发的锻件成形良好；组织观察表明,轴部获得了基本无δ相的组织；盘部晶粒度达6～8级,且δ相以球化状态分布在晶界。经性能测试,锻件两部分的力学性能均达到了相应技术条件要求。
A two - step forging approach was taken in the production of GH4169 turboshaft of an engine, which was an integration of a disk and a shaft. Firstly press forging and precision forging were used to form the shaft with required structure and properties and the billet of the disk. Secondly die forging was used to process the disk. Analysis was made on the required shape of the billet for die - forging. The feasibility of the forming of the disk was confirmed with finite element simulation on Deform - 3D. In order to get required structures and properties of the shaft and the disk, respectively, different heating temperatures and finish forging temperatures were adopted for the shaft and the disk during precision forging and die forging. The trial - produced forging had a well - formed configuration. It was shown that the microstructure of the shaft was nearly free of delta phase and in the disk the grain sizes were ranging from grade 6 to grade 8 of ASTM and spheroidized delta phase was distributed on grain boundaries. Laboratory tests showed that the mechanical properties of both the shaft and the disk met specifications respectively.
出处
《上海钢研》
2006年第3期22-24,32,共4页
Journal of Shanghai Iron and Steel Research
关键词
涡轮轴
Δ相
有限元模拟
模锻
保温
turboshaft
delta phase
finite element method simulation
die forging
heat preservation
