The main reasons for end face cracks of a certain batch of bearing stamping rollers were ana-lyzed by analyzing the stamping process,observing the morphology and microstructure of the crack location and fracture surface.The results showed that due to the presence of localized carbide precipitation and ex-cessive carbide banding in the raw materials,the plasticity and toughness of this area deteriorated.Moreo-ver,during the cold heading processes,the deformation of the large end face was significant,and the work hardening effect was strong,the superimposed effects of the two produced cracks.The measures to solve cracks were put forward,it was necessary to strictly control the quality of raw materials,ensure the uni-formity of material organization and composition to avoid the recurrence of similar problems.
关键词
冲压滚子/大端面/裂纹/碳化物带状/碳化物液析
Key words
stamping roller/large end face/crack/carbide banding/carbide precipitation
维普
万方数据