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Show A One-Piece Railway Wheel. A process for making n one-piece steel railway wheel has beon dovlscd. Kor a 33-ln. whool an Ingot nbout 1C Inches In diameter Is used, and with stenm-hnmmer and hydraullo press the, Ingot Is forged until tho hub and web nro brought to practically tho finished size. It Is then subjected to a process of heat treatment, so that tho outer portion of tho wheol Is brought to a rolling heat, whllo tbo web and hub nro kept at a lower red beat Tho rolling process brings tho wheol to Its final shape |