METHOD FOR MAKING WEAR RESISTANT CASTINGS Russian patent published in 2003 - IPC

FIELD: foundry, namely strengthening working surfaces of parts operating in condition of abrasive wear at normal and elevated temperature values. SUBSTANCE: method comprises steps of passing metallic rod through hard-alloy plates for suspending said plates and immersing them into melt slag; placing and fixing in casting mold; then pouring melt metal to casting mold; using slag of next content (mass %): SiO₂, 20-35%; MnO, 10 - 25%; CaF₂, 8 - 10%; CaO, 10 - 15%; Al₂O₃, 4 - 6%; H₃BO₃, 5 - 15%; Na₂B₄O₇, 5 - 15%; Na₃(AlF)₆, 8 - 10%. Cladding layer of slag formed on plates prevents oxidation of plates at metal casting, provides good wettability, increases cohesion strength of plates with metal. EFFECT: enhanced wear resistance of cast products. 1 dwg, 1 tbl