32Cr3Mo1V铝板铸轧辊套开裂分析  

Crack Analysis of 32Cr3Mo1V Roller Shell for Aluminum Plate Casting

作　　者：尤海涛 刘耀辉 杨永生 YOU Haitao;LIU Yaohui;YANG Yongsheng(YTO(Luoyang)Fuel Injection Co.,Ltd.,Luoyang 471004,China;Manufacturing Engineering Center,First Tractor Company Limited,Luoyang 471004,China)

机构地区：[1]一拖(洛阳)燃油喷射有限公司,河南洛阳471004 [2]第一拖拉机股份有限公司制造工程中心,河南洛阳471004

出　　处：《拖拉机与农用运输车》2021年第1期57-60,共4页Tractor & Farm Transporter

摘　　要：铝板铸轧系统使用的32Cr3Mo1V辊套在使用过程中发生了开裂。利用宏观观察、光学显微镜、硬度测试、扫描电镜及能谱仪等方法对开裂位置的断口形貌、金相组织、微区形貌及化学成分进行了分析。结果表明,辊套在机加工后表面存在微缺陷,铸轧过程中熔融的铝液渗入微缺陷并凝固形成坚硬的氧化铝夹杂。在反复作用的交变热应力和机械应力的作用下,氧化铝夹杂向辊套内部扩展,最终导致辊套整体开裂。The crack was appeared at 32Cr3Mo1V roller shell for the aluminum plate casting system in service.The fracture surface topography,metallographic structure,micrograph morphology and chemical composition were analyzed by means of macroscopic observation,optical microscope,hardness testing,scanning electron microscope and EDS(energy disperse spectroscopy).The results show that the microscopic defects on the roller surface are caused by machining,and molten aluminum permeates into the defects and becomes solidified alumina inclusion,and the harder alumina inclusion inserts into the roller shell inner under the action of the alternate thermal stress and alternate mechanical stress,and then leads to the overall cracking of the roller shell.

关 键 词：32Cr3Mo1V辊套 失效分析 开裂 

分 类 号：TG333.17[金属学及工艺—金属压力加工]