Notes for carburizing parts
1) Pretreatment normalizing before carburizing -- the purpose is to improve the original structure of the material, reduce banded structure, eliminate Weissner structure, make the surface roughness finer, and eliminate the unreasonable state of material flow line. Normalizing process; Air cooled at 860--980℃, 179--217HBS.
2) For the workpiece to be machined after carburizing, the hardness should not be higher than 30HRC.
3) For the carburized quenching parts with thin-wall trench, the thin-wall trench cannot be processed before carburizing.
4) Do not use galvanizing method to prevent carburizing.
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