摘要
ZG270-500钢挖掘机悬臂筒轮廓处因产生裂纹而导致失效。本文对失效悬臂筒的化学成分、硬度、显微组织进行了综合分析,并用扫描电镜及X射线能谱分析仪对断口形貌以及夹杂物进行了观察和微区成分分析。结果表明,导致ZG270-500钢悬臂筒开裂失效的主要原因是MnS夹杂物、在铸造过程中产生的孔洞以及在热处理过程中产生的魏氏组织造成的。
Failure is caused by cracks in the outline of ZG270-500 cantilever tube of a steel excavator. The chemical composition, hardness and microstructure of the failed cantilever tube were analyzed. The fracture morphologies and inclusions were observed by scanning electron microscope（SEM） and X-ray energy dispersive spectroscopy（XRD）. The results show that the main causes of cracking failure of ZG270-500 steel cantilever tube are the holes produced in casting process MnS inclusions and the Widmanstatten structure produced during heat treatment.
作者
王海平
杨静
苏婷婷
马勤
WANG Haiping;YANG Jing;SU Tingting;MA Qin(Tianhua Institute of Chemical Machinery and Automation Co.,Ltd.,Lanzhou 730060,China;Quality Supervisory Centre of Chemical Equipment,Nanjing 210036,China;Lanpee Technologies Co.,Ltd.,Lanzhou 730070,China;Machinery Industry Shanghai Lanya Petrochemical Equipment Inspection Co.,Ltd.,Shanghai 201518,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《热加工工艺》
CSCD
北大核心
2018年第17期256-258,共3页
Hot Working Technology
