Abstract
The properties of HIP'ed specimens such as deformation, density, bending strength, hardness, and microstructure are investigated and compared with sintered specimens without HIP treatment (normal process). It is confirmed that the properties of HIP'ed specimens sintered at 1180-1195°C in vacuum are superior to normal process.
The result obtained can be summarized as follows;
1) The accuracy : the deformation of HIP'ed specimens are little (less than 60μm), whereas that of specimens made by normal process are more than 150μm.
2) The mechanical property : bending strength of HIP'ed specimens is 358-372kgf/mm2, whereas that of specimens made by normal process is 270kgf/mm2.
