1. Controlled-atmosphere carburizing process
The process involves using a heat-absorbing protective atmosphere (produced by the reaction between air and natural gas) mixed with a carburizing atmosphere (natural gas), and carrying out carburization at 900–950℃. The carbon potential can be automatically controlled, typically around 1.15%, with a control accuracy of up to ±0.05%.
Its characteristics include: rapid carburizing rate, uniform depth of the carburized layer, consistent hardness and microstructure throughout the parts; the hardness variation among parts in the same batch can be as low as ±1.5 HRC. Furthermore, the sealed quenching process ensures that the surface remains free from decarburization and oxide scale.
Typical parts: automotive rear-axle gears, automotive transmission gears, automotive steering gear gears, and more.


















