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Effects of Shot-Peening on Cr-Rare Earth-Boronizing at Low Temperature for Medium Carbon Steel

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Abstract:

Effects of shot-peening on Cr-Rare earth-boronizing at 650°C for 4 – 8h for medium carbon steel are investigated in this paper. The value difference in boron diffusion activation energy between shot-peening and undeformation is calculated. The layer depth, microhardness and brittleness are also analyzed. The results show that the activation energy has a decrease of 5647.78 J/mol after shot-peening for 1.5h, and the layer depth increases with prolonged shot-peening time. The layer can also retain its high hardness with low brittleness. The analysis indicates that shot-peening can provide a large number of crystal lattice defects that facilitates boron diffusion in the steel, and the low temperature is apt to remain high dislocation density.

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Periodical:

Advanced Materials Research (Volumes 97-101)

Pages:

437-441

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.97-101.437

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Online since:

March 2010

Authors:

Bin Xu, Ren Hong Guo, Zhong Quan Ma, Cai Gao, Xiao Hong Fan

Keywords:

Brittleness, Cr-Rare Earth-Boronizing at Low Temperature, Layer Depth, Microhardness, Shot Peening

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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