The wheel hubs of large mining dump trucks (with payload capacities of 100-300 tons) must support the total vehicle weight (which can reach several hundred tons) while transmitting driving power.
Forged from 35CrMo alloy structural steel and, after quenching and tempering treatment, maintains high-temperature strength (with yield strength remaining ≥600MPa at 500°C) along with excellent creep resistance.
Undergo forging followed by isothermal quenching, developing a bainitic microstructure on the surface with hardness reaching 45-50HRC, which delivers outstanding wear resistance and thermal fatigue resistance, effectively preventing brake failure caused by high-temperature cracking during braking operations.