Handling chemical, thermal and microstructure of the casting process of gray iron alloy for increased wear resistance in the manufacture of die for glass containers

摘要

This research studies the behavior of microstructural and mechanical properties of wear resistance of gray iron alloy used in the manufacture of die for glass; the alloy is chemically and thermally manipulated in order to change the type of graphite in the temple area to improve wear resistance and thermal conductivity. With the addition of micro alloying of 0.09 to 0.18% Titanium, Copper, Nickel, Chrome between 0.5% lower ranks, vanadium and molybdenum ranges of less than 0.002%. Cycles of heat treatment at 12 and 36 hours between annealing temperatures of 890 ° C and 910 °C. The samples were characterized by optical microscopy and scanning electron to evaluate the quality of the size and shape of graphite Vickers microhardness and Pin-Ball Disc-were used to quantify the mechanical properties of wear resistance, plasma spectrometry was used to determine the number of elements in the alloy gray iron. In the results showed significantly better wear resistance properties through the formation of graphite type D and E with a flake size between 6 and 8 and decreased phase Perlite in areas of contact with the glass.