Friction in Hot Forging of Chrome Steel Covered with Oxide Scale Film Generated at Steam Atmosphere

Abstract:

The hot ring compression test of chrome steel covered with an oxide scale film is carried out to examine the effects of the oxide scale film on the hot forging characteristics. For changing the chemical compositions of the oxide scale, the oxide scale film is generated at air or steam atmosphere. The nominal coefficient of shear friction of the chrome steel covered with the oxide scale film is estimated from the plastic deformation behavior during the ring compression test. The estimated coefficient of shear friction of the chrome steel covered with the oxide scale film is found to be lower than that of the chrome steel without the oxide scale film. Furthermore, the oxide scale generated at steam atmosphere provides lower friction characteristics in comparison with the oxide scale generated at air atmosphere. The mechanism of the reduction of friction with the oxide scale is discussed.

• Periodical: Key Engineering Materials (Volumes 622-623)
• Pages: 194-200
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.622-623.194
• Online since: September 2014
• Authors: Ryo Matsumoto*, Shohei Harada, Hiroshi Utsunomiya
• Keywords: Friction, Hot Forging, Oxide Scale, Steel

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