Properties and Quality of the Surface of Iron-Copper Powder Details

The nondestructive methods for the quality and properties control of iron-copper powder details are analyzed. For the small details the induction method is used. The amplitude, phase and frequency spectrum of excited current depends on the shape of detail, properties and continuousness of material. The measuring transducer obtains information about the properties of detail by means of specified magnetic flow density. Experiments with details after compacting, sintering and infiltration by metallic melts based on copper are carried out. The influence of green strength, infiltration temperature and composition on the quality of details is revealed. For the control of the details of complicated shape – for example, impeller of radial flow pump – the sclerometric method is used. This method allows to uncover the inequality of infiltration and to evaluate the reliability of detail parts joining