Abstract
The GCr15 steel specimens were treated through laser transformation hardening technology. Influence of the laser transformation hardened layers on the bending strength and flexural deflection of the specimens was studied through three-point bend tests. Fractal dimensions of the hardened layer fracture were calculated by image processing. The results show that the bending strength and flexural deflection of the specimens are decreased obviously after the laser quenching and failure mechanism also changes, which causes the decrease of fracture toughness and the plasticity in the laser transformation hardened layers. There are relationships between laser quenching GCr15 steel bending properties and hardened layer fracture fractal dimension.
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