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5CrNiMo热环轧芯辊断裂失效分析
英文标题:Failure analysis on the fracture of hot ring-rolling core roller 5CrNiMo
作者:周敏 
单位:重庆电子工程职业学院 
关键词:5CrNiMo 芯辊 失效分析 断裂 
分类号:TG441.8
出版年,卷(期):页码:2015,40(5):145-148
摘要:
针对5CrNiMo芯辊在环件轧制过程中出现的断裂失效问题,采用断口宏观和微观形貌观察、化学成分检测、金相检验和硬度测试等方法对断裂芯辊进行分析。在理化试验的基础上,运用微观断裂机理和数值模拟对芯辊的断裂原因进行分析。研究结果表明,5CrNiMo芯辊断裂的原因是由于芯辊热处理不当,导致芯辊表面疲劳抗力低,在环件轧制过程中承受循环应力而在表面形成疲劳源并逐步扩展,最终导致芯辊断裂。因此提出严格控制芯辊的热处理工艺参数和采用表面喷丸来提高芯辊疲劳寿命的解决措施。
 
 For the fracture failure of core roller 5CrNiMo during the ring-rolling process, the fractured core roller was investigated through macroscope and microscope fractography, chemical composition test, metallographic examination and hardness test. Based on the physical and chemical experiments, the fracture cause of the core roller was analyzed by micro-fracture mechanism and numerical simulation. The results show that the irrational heat treatment process leads to poor surface fatigue resistance of the core roller. Further, during the ring-rolling process, the core roller endures cyclic stress which generates the source of fatigue crack and it expands gradually. Finally, the core roller breaks. It is proposed that the heat treatment process parameters should be controlled strictly and the method of prolong fatigue life of the core roller is adopted by surface peening technology.
基金项目:
作者简介:
周敏(1975-),女,硕士,讲师
参考文献:


[1]华林,钱东升. 轴承环轧制成形理论和技术[J]. 机械工程学报,2014,50(16):70-76.Hua L, Qian D S. Ring rolling forming theory and technology for bearing [J].Journal of Mechanical Engineering, 2014,50(16):70-76.
[2]徐建兵,余际星,苏凯. 硫化物对W6Mo5Cr4V2 冷轧芯辊疲劳裂纹萌生的影响[J]. 钢铁钒钛,2006,27(4):48-52.Xu J B, Yu J X, Su K. Effect of sulphide on fatigue crack initiation of W6Mo5Cr4V2 cold ring-rolling mandrel [J]. Iron Steel Vanadium Titanium, 2006,27(4):48-52.
[3]华林,贾耿伟,毛华杰. W6Mo5Cr4V2钢轴承环冷轧芯辊的疲劳断裂与寿命分析[J]. 机械强度,2007,29(1):156-160.Hua L, Jia G W, Mao H J. Fatigue fracture and life analysis for W6Mo5Cr4V2 bearing ring cold-rolling mandrel [J]. Journal of Mechanical Strength, 2007,29(1):156-160.
[4]渠彬,朱世根,顾伟生. 轧辊失效方式及其原因分析[J]. 山东冶金,2005,27(1):31-33.Qu B, Zhu S G, Gu W S. Roll failure fashion and its causes analysis [J]. Shandong Metallurgy, 2005,27(1):31-33.
[5]李福海,陈兴驰,佟鑫,等. 铝板铸轧辊套表面热疲劳开裂及防止措施研究[J]. 有色设备,2012,(1):9-12.Li F H, Chen X C, Tong X, et al. Study on thermal fatigue crack on the surface of roller shell for aluminum plate casting and preventive measure [J]. Nonferrous Metallurgical Equipment, 2012,(1):9-12.
[6]孙智,江利,应鹏展. 失效分析—基础与应用[M]. 北京:机械工业出版社,2005.Sun Z, Jiang L, Ying P Z. Failure Analysis-Fundamentals and Application [M]. Beijing: China Machine Press, 2005.
[7]王光艳,梅益,陈浪,等. 42CrMo环件轧制成形的数值模拟与分析[J]. 锻压技术,2014,39(5):82-86.Wang G Y, Mei Y, Chen L, et al. Numerical simulation and analysis of rolling forming of 42CrMo rings [J]. Forging & Stamping Technology,2014,39(5):82-86.
[8]张铁军,姜中涛,涂铭旌. Φ700 mm轧机轧辊断裂失效分析[J]. 机械工程材料,2014,38(4):105-108.Zhang T J, Jiang Z T, Tu M J. Failure analysis of fracture roller in Φ700 mm for a rolling mill [J]. Materials for Mechanical Engineering,2014,38(4):105-108.

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