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我厂转子发动机的径向密封片是用碳素浸铝材料制成。由于该零件工作条件十分恶劣,而碳素浸铝材料的生产工艺又不太稳定,因此要求在装机运行前必须进行无损探伤,以确保发动机工作的可靠性。碳素浸铝材料是用碳粉经过压制、烧结之后再在高温高压下使液态铝合金浸入到材料的孔隙中待冷却后加工成型的。除了碳素制品本身的质量外,浸铝的好坏,即:铝合金浸透与否、分布是否均匀、内部有无孔洞,裂纹……,都严重影响制件的使用性能。由于材料是由多量的非金属碳和少量的轻金属铝组成,零件的几何尺寸较小(7×11×70mm),我们先后试用过超声波探伤和一般工业 X 射线探伤,都未能
The radial sealing piece of our factory rotor engine is made of carbon-impregnated aluminum material. As the parts working conditions are very poor, and carbon-based aluminum material production process is not stable, requiring the installation of non-destructive testing must be carried out before running to ensure the reliability of the engine. Carbon aluminum material is pressed with carbon powder, sintered at high temperature and pressure after the liquid aluminum alloy immersed in the pores of the material to be cooled and then forming. In addition to the quality of carbon products themselves, the quality of the aluminum dip, namely: saturated or not, the distribution is uniform, there are no holes, cracks, etc., have a serious impact on the performance of parts. Since the material consisted of a large amount of non-metallic carbon and a small amount of light metal aluminum, the geometry of the part was small (7 × 11 × 70 mm), we have tried ultrasonic flaw detection and general industrial X-ray flaw detection, none of which