High-porous materials of carbon steel fibers and their mechanical properties

A base porous material made of pressed and sintered St.10 steel fibers is carburized, hardened, and tempered to produce new porous materials of 60 and U8 hardened steel fibers. Comparing the mechanical properties of porous materials made of St.10, 60, and U8 steel fibers shows the following. In compression tests, the hardened 60 steel material with 70 and 80% porosity has yield stress higher by a factor of 10 and 8, respectively, than that of the base material. In tension tests, the hardened U8 steel material with a porosity of 60-90% has three to six times higher yield stress and tensile strength than those of the base material.