Heat treatment method for carburizing and quenching of automobile gearbox gears
A technology of automobile gearbox and heat treatment method, which is applied to heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of shortening service life, reducing fatigue resistance, and high carburizing temperature, so as to increase quenching oil temperature and prolong carburizing time. , The effect of reducing carburizing temperature and quenching temperature
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[0018] The heat treatment method for carburizing and quenching of automobile transmission gears, including:
[0019] A. Carburizing step, put the gear into the material basket, and then put it into a sealed box-type multi-purpose heating furnace. The heating furnace is raised from room temperature to 900±5°C for carburizing, and the carburizing time is 3 to 4 hours; in this embodiment Among them, the heating furnace was raised from room temperature to 900°C, and the carburizing time was 3 hours and 40 minutes.
[0020] After the temperature rises to 900±5°C, methanol and propane are introduced into the heating furnace and carburization begins. The carburization is divided into initial stage, strong infiltration stage and diffusion stage; where: the carbon potential CP in the initial stage of carburization is 0.95±0.03C%, 9-11 minutes; the carbon potential CP of the strong infiltration stage of carburization is 1.06±0.03C%, 170-190 minutes; the carbon potential CP of the diffus...
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