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The gear shaft becomes more flexible after assembly, and the wear resistance and anti-seizure properties of the components are superior to those of carburized and quenched parts with similar depth and hardness. The impact of temperature and time on the layer depth is significant. The compound layer (white bright layer) formed through combined heat treatment exhibits excellent wear resistance; however, this layer is often too thin after nitrocarburizing. The co-infiltration temperature and time play a crucial role in determining both the depth and performance of the layer.
As the co-infiltration temperature increases, the depth of the layer also increases. Similarly, extending the infiltration time enhances the depth, especially during the initial stages, after which the rate of increase slows down. Research indicates that prolonged infiltration time can weaken the compound layer, leading to serious defects. Therefore, it is not cost-effective to extend the time solely to increase the layer depth. In the production of glass UV light-solid machines, the effect of temperature on the layer depth should be carefully considered.
Under controlled process conditions, changing the co-infiltration temperature does not significantly alter the surface element concentration. However, by setting the desired layer depth and hardness specifications, the hardness gradient within the layer tends to become more gradual. This occurs because, after ruthenium treatment via nitrocarburizing, a nitrogen-based compound layer and a diffusion layer form on the surface. Subsequent reheating helps adjust the hardness profile, accelerating diffusion and deepening the layer while increasing its hardness.
Additionally, the interplay between co-infiltration temperature and time influences the decomposition of nitrogen and carbon compounds within the layer, further affecting its overall performance and structural integrity. Understanding these factors is essential for optimizing the nitrocarburizing process and achieving the desired mechanical properties in the final product.