Hard and corrosion-resistant pig iron-based (Fe62Cr8Nb4Mo4(C,B)22) steel glass

In this article, the Fe$₆₂$Cr$_8$Nb$_4$Mo$_4$(C,B)$₂₂$ steel glass was produced using inexpensive pig iron as the main masteralloy, with minor addition of commercially available ferrous alloys. The fully vitreous nature of the steel producedby melt-spinning was confirmed through X-ray diffraction, from conventional and synchrotron radiationsources, and transmission electron microscopy. Differential scanning calorimetry confirmed the glass transitiontemperature of approximately 553 ◦C, and the onset of the crystallization at 574 ◦C, with supercooled liquidtemperature interval of 21 ◦C. The Fe$₆₂$Cr$_8$Nb$_4$Mo$_4$(C,B)$₂₂$ steel glass proved to be harder than the pig iron (1070vs. 666 HV0.1, respectively) and more stable in chloride-rich medium than the 444 stainless steel, as assessed bythe passivation window prior to pit corrosion (1253 vs. 738 mV, respectively) and the ease reprotection upon thereverse scan. The results contribute to the strategies for production of affordable hard and corrosion-resistantsteel glasses for demanding applications.