Effects of Shot-Peening on Cr-Rare Earth-Boronizing at Low Temperature for Medium Carbon Steel
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.
Zhengyi Jiang and Chunliang Zhang
B. Xu et al., "Effects of Shot-Peening on Cr-Rare Earth-Boronizing at Low Temperature for Medium Carbon Steel", Advanced Materials Research, Vols. 97-101, pp. 437-441, 2010