Abstract: The abrasive resistant high manganese cast steel of the present invention has a high wear resistance and a high shock resistance, and contains 1.3-1.4 weight % of C, 0.05-0.20 weight % of Si, 14.0-15.0 weight % of Mn, 0.5-1.5 weight % of Cr, 0.3-0.8 weight % of V, 0.2-0.4 weight % of Ti, and 0.5-1.0 weight % of Mo, and a balance of Fe and inevitable impurities.

Abstract: A high temperature corrosion-resistant and wear-resistant casting alloy used for preparing rotatory cylinder of glass fibers spinning, which consists essentially of 0.08 to 0.8% of C, 15 to 35% of Cr, 1 to 5.5% of W, 0.10 to 0.25% of Ti, 0.10 to 0.25% of Zr, about 1% of Nb, and the remainder constituted by Ni and impurities unavoidably carried into the alloy.

Abstract: A shaping ferrous metal member used in a metal-working apparatus is heat-treated at about 1,000.degree. C. for several hours in an incompletely burning fuel gas, to provide a burned gas atmosphere composed of 0.5 to 5.0% of CO, 8 to 12% of CO.sub.2, 0 to 0.5% of O.sub.2. A tough iron oxide layer of high quality is tightly deposited with a uniform thickness by said heat-treatment on the surface of shaping metal member which is abrasively contacted by a sliding semifinished metal product. The advantageous effect of this method is that a consumable shaping metal member has a life 2 to 4 times longer than that of a metal member which is conventionally heat-treated in a completely-burning fuel gas.