trolley wheel die forging wheel, high strength, high wear resistance, excellent mechanical properties and long life trolley wheel features: 1) Material: 60#,65 # , 65Mn, 42CrMoA2) Heat treatment :hardening and tempering,high frequency quenching,carburizing quenching and so on3) Trand surface and rim quench hardness: HRC45-554) Trand surface and rim quench depth: 15-18mm5) processing wheel ...