Preparation and Characterization of the Decarbonization Preventing Nano-Coating Applied in Spring Steel Protection

Abstract:

Surface decarburization is one of important issues in spring steel production. The novel decarbonization-resistant nano-coating has been successfully fabricated, by using a low-cost, and easily accessible bauxite minerals and other additional components, including magnesia, silicon carbide，glass powder and agglomerant, which is used to prevent spring steels from being decarburized during the hot-rolling process. The microstructure of the protective nano-coating is observed by means of X-ray diffraction, TG-DTA, metalloscope and so on. It is found that even if some glass ceramic exists within the coating in the initial lower temperature (950°C~1000°C) the decarbonization-preventing coating still presents decarburization resistance up to 72.2%. Furthermore, the protective ration reaches to 100% when the heating temperature rises to range (1050°C~1100°C). The excellent decarbonization preventing properties are attributed to the formation of glass ceramic and pleonaste, which hinders the second interdiffusion of oxygen and carbon.

• Periodical: Materials Science Forum (Volume 688)
• Pages: 238-244
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.688.238
• Online since: June 2011
• Authors: Xiao Jing Wang, Shu Feng Ye, H.W. Xu, L.Q. Wei, Xun Zhou, Y. F. Chen
• Keywords: Decarbonization, High-Temperature, Nano Coating, Spring Steel

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