Modified low temperature case hardening processes

Details Modified low temperature case hardening processes Modified low temperature case hardening processes

C - Chemistry, Metallurgy

23

C

C23C 8/20 (2006.01) C23C 8/02 (2006.01) C23C 8/22 (2006.01) C23C 8/80 (2006.01)

Patent

CA 2398675

An iron-containing workpiece is case hardened by low temperature carburization during which one or more process steps - including adjusting the carburization temperature, adjusting the concentration of carburization specie in the carburization gas and reactivating the surfaces to be carburized - is carried out to enhance the overall rate and uniformity of carburization with minimized soot generation, whereby carburization can be completed faster than possible in the past.

L'invention concerne un procédé de cémentation à basse température d'une pièce contenant de l'acier. Durant ce procédé, une ou plusieurs étapes - comprenant l'ajustage de la température de cémentation, l'ajustage de la concentration du type de cémentation dans le gaz de cémentation et la réactivation des surfaces à cémenter sont mises en oeuvre afin d'améliorer les performances générales et l'uniformité de la cémentation avec un minimum de suie, la cémentation pouvant être effectuée plus rapidement que dans le passé.

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