Surface Failure Reason Analysis on GCr15 Steel Spinning Rollers

By means of macro observation, chemical compositions analysis, hardness testing, metallographic examination, fracture analysis and energy spectrum analysis, early surface cleft spalling failure reason of a batch of GCr15 steel spinning roller was analyzed. The results show that carbide in material of the roller gathered and distributed in formation of chain-type and strip-type, which increased brittleness of the roller and lowered its fatigue life. So surface cleft spalling failure happened at the maximum stress zone only after a round use, and resulted in the contact fatigue failure of the roller.