FORMING QUALITY OF TITANIUM ALLOY LARGE- SCALE INTEGRAL COMPONENTS ISOTHERMAL LOCAL LOADING
FORMING QUALITY OF TITANIUM ALLOY LARGE- SCALE INTEGRAL COMPONENTS ISOTHERMAL LOCAL LOADING
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发表时间：
2009
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影响因子：
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通讯作者：
Zhichao Sun;H. Yang
中科院分区：
文献类型：
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作者：
Zhichao Sun;H. Yang
在大型钛合金整体构件等温局部加载成形过程中，由于构件肋高、腹板薄、形状复杂等原因，容易产生下填充缺陷和流线折叠缺陷。本文基于DEFORM3D软件，建立了具有代表性的TA15钛合金大型复杂整体构件等温局部加载成形有限元模型，并验证了模型的可靠性和适用性。然后结合理论分析和实验分析，对该肋腹板构件的成形质量及常见缺陷进行了分析。提出了5种局部加载方案，研究了下填和折叠缺陷产生的原因及相应的解决方案，提出了合理的工艺条件。在此基础上，实现了TA15大型整体式零件的实际成形，获得了质量良好的锻件。研究结果为优化成形工艺提供了依据，为更好地实现复杂大型整体部件局部等温加载成形提供了参数选择依据。
During the isothermal local loading forming of the large-scale integral component of titanium alloy, the underfill and streamline folding defects are prone to occur due to high ribs, a thin web, and the complex shape of the component. In this paper based on DEFORM3D software, a finite element (FE) model for the isothermal local loading forming of representative large-scale complex integral component of TA15 titanium alloy was established and the reliability and applicability of the model were validated. Then combined with theoretical analysis and an experiment, the forming quality and the common defects for this rib-web component was analyzed. Five local loading schemes were proposed to study the reasons and the corresponding solutions for underfill and folding defects and then the reasonable process condition ware proposed. According to this, the practical forming of the TA15 large- scale integral component was achieved and the forging with good quality was obtained. The results obtained provide a basis for optimizing the forming process and priming a parameter selection for better complex large-scale integral component isothermal local loading forming.