The invention discloses a Fe-Cr-B
system corrosion-resistant block amorphous
alloy and a preparation method thereof and belongs to the field of amorphous alloys. The chemical components of the Fe-Cr-B
system corrosion-resistant block amorphous
alloy are designed according to the
atomic ratio as follows: FeaCrbMocBdMeRfXg and are characterized in that M is one or more of Mn, Co and Ni, R is one or more of Ti, Zr, Nb, Hf, Ta and W, and X is one or more of Si and P, wherein a is larger than 20 and no larger than 78, b is no less than 5 and no larger than 45, c is no less than 0 and no larger than 20, d is no less than 6 and no larger than 30, e is no less than 0 and no larger than 40, f is no less than 2 and no larger than 15, g is no less than 0 and no larger than 10, and a+b+c+d+e+f+g=100. The Fe-Cr-B
system corrosion-resistant block amorphous
alloy is characterized in that the Fe-Cr-B system corrosion-resistant block amorphous alloy is low in cost and can be smelted by using an industrial
raw material, is high in
boron content, is good in amorphous formation capability and is particular suitable for storage and transportation of nuclear wastes, is high in Cr content without containing C so as to ensure excellent corrosion resistance, and is also very high in
compressive strength and microhardness. Therefore, the iron-based amorphous alloy disclosed by the invention has a good application prospect in the aspects of
metal material corrosion resistance,
nuclear facilities and wear-resistant parts.