HIP METHOD FOR REPAIRING DEFECTS ON HOT PARTS OF TURBOMACHINES THROUGH HYBRID HOT ISOSTATIC PRESSING HIP PROCESS

摘要

In a hot isostatic pressing (HIP) method, a component to be treated, affected by defects, like porosity, cracks and cavities in a structure, is placed into a container together with a non-metallic material in form of powder or grains having a size greater than the porosity and the cracks and defects of the component. During the HIP process, the non-metallic material presses the whole surface of the embedded component in order to generate a combination of the temperature and forces capable of reducing defects which are embedded and not embedded in the component itself. The component is not contaminated during the process, thereby easily removing the non-metallic material by simple operation of mechanical cleaning or chemical washing.