The invention provides a
carburizing method for a
wind power gear used for
wind power generation, which comprises the following steps: carrying out first
carburizing treatment on the
wind power gear to be treated under the
atmosphere with
carbon potential of 0.8%-1.1%, then carrying out first
quenching treatment, further rising the temperature to 600 DEG C-660 DEG C, and carrying out first
tempering treatment; then carrying out second
carburizing treatment under the
atmosphere with the
carbon potential of 0.8%-1.0%, and carrying out second
quenching treatment after the second carburizing treatment; and further carrying out second
tempering treatment on the wind power gear at 150 DEG C-200 DEG C after the second
quenching treatment. Compared with the prior art, the carburizing method is characterized by firstly carburizing the wind power gear for 30-40h under the
atmosphere with the
carbon potential of 0.8%-1.1%, and then uniformly dissolving and dispersing over-saturated carbon in
martensite after the first high-temperature
tempering so as to be conductive to the next step of the treatment; and further carburizing the wind power gear for 1-4h under the atmosphere with the carbon potential of 0.8%-1.0% after the first high-temperature tempering treatment, thereby further increasing the carbon concentration on the surface of the wind power gear and improving the
surface strength during the second carburizing treatment.