轴承滚子冲压裂纹形成机理及控制工艺研究  

Research on Cracks Formation Mechanism and Control Technology of Bearing Roller During the Stamping Process

作　　者：董小波 史亚妮 魏建文 王超 尤蕾蕾 崔广发 DONG Xiaobo;SHI Yani;WEI Jianwen;WANG Chao;YOU Leilei;CUI Guangfa(Luoyang Bearing Group Co.Ltd.,Luoyang 471039,Henan,China;Key Laboratory of Aviation Precision Bearing,Luoyang 471039,Henan,China;Henan High-end Bearing Industry Research Institute,Luoyang 471039,Henan,China;Bearing Technology Innovation Center of Henan Province,Luoyang 471039,Henan,China)

机构地区：[1]洛阳轴承集团股份有限公司,河南洛阳471039 [2]航空精密轴承国家重点实验室,河南洛阳471039 [3]河南省高端轴承产业研究院,河南洛阳471039 [4]河南省轴承技术创新中心,河南洛阳471039

出　　处：《热处理技术与装备》2024年第4期26-30,共5页Heat Treatment Technology and Equipment

摘　　要：某批轴承冲压滚子端面出现裂纹,通过分析其冲压过程,观察其裂纹处及断口的形貌和显微组织,对裂纹产生的主要原因进行分析。结果表明,原材料局部存在的碳化物液析和碳化物带状超标导致该部位塑韧性变差;并且冷镦过程中大端面的变形较大,加工硬化作用强,在二者叠加作用下产生裂纹。提出了解决裂纹的措施,需要严格控制原材料质量,保证材料组织和成分的均匀性,避免类似问题再次发生。The main reasons for end face cracks of a certain batch of bearing stamping rollers were analyzed 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 excessive carbide banding in the raw materials,the plasticity and toughness of this area deteriorated.Moreover,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 uniformity 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 

分 类 号：TH133.3[机械工程—机械制造及自动化]