Analysis of Surface Layer Defects on Carburized Steel Component after Alkaline Blackening

Abstract:

Alkaline blackening is one of the most popular surface treatment technology of components with the requirement for higher surface corrosion resistance, increased hardness, and the decorative appearance.This contribution deals with the appearance of surface defects on carburized steel components after the process of alkaline blackening, which appeared to be red shiny stains on an otherwise black matte surface of the component. The occurrence of defects on surface was observed several days after the alkaline blackening process. By means of metallographic methods, direct connection between surface defects and the microstructure of the material was found.Contribution further deals with the influence of microstructure and technological parameters on the quality of the final surface layer of the components.

• Periodical: Materials Science Forum (Volume 891)
• Pages: 274-277
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.891.274
• Online since: March 2017
• Authors: Pavel Gejdoš*, Lenka Klakurková, Martin Juliš, Miroslava Horynová, Michaela Remešová, Eduard Hégr
• Keywords: Alkaline Blackening, Carburized Steel, Heat Treatment, Microstructure, Surface Defect

References

[1] R.W. Farrell, Blackening of ferrous metals, Metal Finishing [online]. 2001, 99, 471-477. DOI: 10. 1016/S0026-0576(01)85307-1. ISSN 00260576.

DOI: 10.1016/s0026-0576(01)85307-1

[2] N. Hall, Blackening and antiquing. Metal Finishing [online]. 1999, 97(1), 466-475. DOI: 10. 1016/S0026-0576(99)80048-8. ISSN 00260576.

DOI: 10.1016/s0026-0576(99)80048-8