The invention discloses a high-tenacity
boron-containing high-
chromium abrasion-resistant
alloy and a preparation method thereof. The high-tenacity
boron-containing high-
chromium abrasion-resistant
alloy comprises, by
mass, 0.20%-0.6% of C, 15%-20% of Cr, 0.5%-1.10% of Si, 3.5%-6.0% of Mn, 0.4%-2.3% of B, 0.4%-1.5% of Cu, 0.3%-1.2% of Ti, 0.10%-1.0% of V, 0.05%-0.3% of Nb, 0.05%-0.10% of Al, 0.10%-0.25% of Ca, 0.05%-0.2% of Y, 0.05%-0.3% of Ce, 0.04%-0.20% of N, 0.05%-0.15% of K, 0-0.03% of S, 0-0.04% P, and the balance Fe.
Scrap steel and ferrochromium are smelted to the temperature of 1560 DEG C to 1620 DEG C by using an
intermediate frequency furnace, after ferrovanadium,
ferrotitanium,
potassium oxide,
silicon-
calcium-
barium alloy, ferrochromium containing
nitrogen, Al, BC, BN, B2O3, Si3N4, Ce and Y in 60 meshes to 100 meshes are proportioned together according to the
mass percent, the mixture is rolled into
metal cored wires of which the diameters range from 8 mm to 15 mm through the adoption of low-
carbon steel of which the thickness ranges from 0.12 mm to 0.25 mm, the
metal cored wires serving as a
boron supplying agent are added into smelted
molten steel, then boron is added, and modifying
inoculation is conducted. The
molten steel pouring temperature is 1400 DEG C to 1450 DEG C, heat preservation is conducted on a
casting for 2 h to 4 h at the temperature of 920 DEG C to 1150 DEG C, and then the
casting is subjected to
air cooling to the
room temperature. The high-tenacity boron-containing high-
chromium abrasion-resistant alloy has the advantages of being good in strength,
hardness, tenacity, thermal-
fatigue resistance and abrasion resistance and low in production cost.