一种不锈钢喷管铸件的熔模精密铸造工艺

发布时间：2018-05-26 05:14

本文选题：铬-镍奥氏体不锈钢 + 起动喷管　；参考：《铸造》2015年11期

【摘要】：起动喷管为某型号涡扇发动机启动时的关键部件,采用铬-镍奥氏体不锈钢1Cr18Ni9Ti整体精密铸造而成。铸件结构具有空间性,并且内部为空心管道,喷口的角度和位置限定严格,因而必须采用陶芯成形和合理的浇注工艺,避免疏松、裂纹等缺陷。同时陶芯必须具有良好的性能,避免铸件产生气孔和脱芯困难现象。形状控制方面采用独特的组合测具来进行铸件的形状检测和冷矫形。通过铸造工艺的优化,保证了冶金质量,提高了铸件合格率。
[Abstract]:The starting nozzle is a key component of a turbofan engine. It is made of Cr-Ni austenitic stainless steel 1Cr18Ni9Ti. The structure of castings is spacial, and the inner part is hollow pipe, and the angle and position of nozzle are strictly limited. Therefore, ceramic core forming and reasonable pouring technology must be adopted to avoid defects such as porosity and crack. At the same time, the ceramic core must have good properties to avoid the formation of porosity and the difficult phenomenon of core removal. In the aspect of shape control, a unique combination tool is used to detect the shape of castings and to make cold orthosis. Through the optimization of casting process, the metallurgical quality is guaranteed and the qualified rate of castings is improved.
【作者单位】：北京钢铁研究总院高温材料研究所;
【分类号】：TG249.5

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