Simulation of the hot isostatic pressing process

This work, models the compaction of a dispersed body under conditions hot isostatic pressing (HIP) cycle using example manufacture compacts from VZh159ID powder and Inconel alloy 718. For research, fraction -70 + 25 μm, bulk density 3.77 g/cm3 (4.83 after tapping), fluidity 2.3 g/s, specific surface area 446 cm2/g, average particle size was used according to Fisher 16 microns, as well 718 -315 3.84 ... 4.58 (4.52 5.24 gcm3 1.58 1.90 330 376 cm2/g Fischer 19.0 19.5 microns. Before HIP cycle, backfills underwent thermal degassing in vacuum, since powders with such high are subject rapid gas sorption. Gases on result can form non-metallic inclusions that reduce properties compact. In microstructure HIP, there is no network residual boundaries granules (PPBs-Prior Particle Boundaries), which indicates an effective technology vacuum powder. Simulation process carried out modernized equation E. Ryshkevich, constants b were selected for materials considered. The results experiments interrupting data strength samples at temperatures obtained by selective laser sintering initial modeling. proposed modeling method quite simple (does not require interrupted cycle) due shown possibility experimentally determining characteristics alloys elevated sintering. analysis microstructures (estimation porosity) having different values, shows good agreement model real gasostatic extruder.