Various types of OSA have properties of a mineral binder, the hydration type of which varies from air hardening
(coarse bottom and cyclone OSA types) to pozzolanic (CFB OSA) and latent hydraulic (PF OSA).
Evidently, after air hardening
from 850 [degrees]C, heating up to 650 [degrees]C enabled disintegration of metastable b-phase, which caused additional hardening of the alloy.
Cox demonstrated that hardness values of 700 Bh and above can be achieved in modified Type-1 irons without high-temperature heat treatment while regular Ni-Hards can be improved by either air hardening
, cryogenic treatments and/or magnesium additions.