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针对Mg-9Gd-3Y-0.6Zn-0.5Zr合金薄腹高筋支架构件,设计其等温锻造成形方案和模具装置。采用有限元软件DEFORM-3D对薄腹高筋支架等温成形过程进行有限元模拟和实验,分析模具结构和成形方案对成形过程中金属流动充填的影响规律,揭示缺陷产生原因,并进行工艺优化,最终成形出质量良好的锻件。结果表明,采用分瓣模具结构和等温成形技术,可整体一次性精密成形形状复杂的薄腹非对称高圆弧筋类锻件,且构件组织细小均匀;通过设置工艺圆角和增加活动阻尼块的方式,可有效控制薄腹高筋支架圆弧筋处金属的流动充填阻力,消除圆弧筋抽料和侧耳充不满缺陷。
For Mg-9Gd-3Y-0.6Zn-0.5Zr alloy thin-framed high-strength stent components, design isothermal forging forming program and die device. Finite element simulation and experiment of finite element software DEFORM-3D was used to simulate the isothermal forming process of thin abdominal high-rise stent. The influence of mold structure and forming scheme on metal flow filling in forming process was analyzed. The causes of defects were revealed and the process optimization, The final shape of a good quality forgings. The results show that the split mold structure and the isothermal forming technique can be used to shape the thin as-shaped asymmetric high-arc-shaped forgings with complex shape at one time and the components are fine and uniform. By setting the process fillet and adding the damping blocks Way, which can effectively control the flesh of the thin abdominal high-arc stent metal flow filling resistance, eliminate the arc ribs pumping and the side earring dissatisfaction defect.