It is suggested that draft keys should be heat-treated,adopting quenching of forging heat and backfiring technics.

Reason analysis and countermeasures of the deformation and cracks on the coupler yoke of CKD_(7F) locomotive;

Prediction for fatigue crack lifetime ofthe endflanged corner of coupler yoke;

Analysis of multi-axial fatigue life based on single axial stress condition of the coupler yoke;

Design of tail dislocated monitor device based on single chip acceleration sensor;