冷轧四辊轧机辊间接触应力与工作辊边裂失效分析  

Analysis of Contact Stress between Rolls and Failure of Work Roll Edge Cracks in Four High Cold Rolling Mill

作　　者：谢晶 王辉 Xie Jing;Wang Hui(Baosteel Roll Technology Co.,Ltd.,Changzhou 213000)

机构地区：[1]宝钢轧辊科技有限责任公司,江苏常州213000

出　　处：《冶金设备》2024年第1期62-65,共4页Metallurgical Equipment

摘　　要：研究冷连轧机组辊系受力分布状态,揭示冷轧四辊CVC连轧机工作辊边部环裂产生原因。以某厂轧辊边部剥落案例为基础,通过对轧辊剥落形貌观察,硬度检测分析,并借助有限元仿真计算对工作辊在服役中的受力分布状态进行了计算。结果表明接触应力最大位置应为与支承辊端部倒角根部,最大应力达到1000MPa。工作辊边部环裂或局部剥落主要与工作辊横向移动在辊身端部受到较大接触挤压应力有关;在高周循环挤压应力作用下,轧辊次表面形成微裂纹,随裂纹扩展最终导致轧辊失效。Study the distribution of force on the roll system of the cold continuous rolling mill and reveal the causes of edge ring cracks on the working rolls of the cold rolling four high CVC continuous rolling mill.Based on the case of edge peeling of a certain factory's rolling mill,the stress distribution status of the working roller during service was calculated through observation of the peeling morphology,hardness testing analysis,and finite element simulation calculation.The results indicate that the maximum contact stress should be located at the root of the chamfer at the end of the support roller and corresponding peak,with a maximum stress of 1000MPa.The circumferential cracking or local peeling at the edge of the work roll is mainly related to the large contact and compression stress at the end of the roll body caused by the lateral movement of the work roll.Under the action of high cycle compressive stress,microcracks form on the secondary surface of the roller,which eventually lead to the failure of the roller as the cracks propagate.

关 键 词：CVC轧机 工作辊 接触应力 疲劳 

分 类 号：TG155.4[金属学及工艺—热处理]