摘要
某厂生产的液压制砖机的液压缸耳环在运行不久后发生断裂失效。通过扫描电镜、能谱仪、直读光谱仪、光学显微镜和显微硬度计对45钢失效耳环的断口形貌、化学成分、显微组织和硬度进行了分析。结果表明,断口处Al_2O_3和硫化物非金属夹杂物较多,显微组织为网状铁素体、珠光体和魏氏组织,纵截面存在明显带状组织,局部晶粒粗大等是造成液压缸耳环失效的主要原因。
The hydraulic cylinder ear of a hydraulic brick making machine produced by a factory generated fracture failure during running.The fracture morphology,chemical composition,microstructure and hardness of 45 steel failed ear were analyzed by using scanning electron microscopy,energy spectrometer,direct reading spectrometer,optical microscope and microhardness tester.The results show that more Al2O3 and sulfide non-metallic inclusions appear in the fracture section,the microstructure is net ferrite and pearlite and widmanstatten structure,obvious band microstructure exists in longitudinal section,local grains are coarse,which are the main reasons for the failure of hydraulic cylinder ear.
作者
邢艳秋
武卫超
王会强
张淼
秦怡宁
马召磊
王志超
吴奕然
XING Yanqiu;WU Weichao;WANG Huiqiang;ZHANG Miao;QIN Yi’ning;MA Zhaolei;WANG Zhichao;WU Yiran(College of Mechanical and Electric Engineering,Agricultural University of Hebei,Baoding 071001,China)
出处
《热加工工艺》
北大核心
2019年第6期255-258,261,共5页
Hot Working Technology
基金
河北农业大学理工基金重点项目(ZD201503)
河北农业大学双语教学课程建设项目(2017SY3)
河北省高等学校科学研究重点基金项目(ZD2017035)
2017河北省大学生创新创业训练计划项目(2017043)
关键词
液压缸耳环
45钢
夹杂物
魏氏组织
hydraulic cylinder ear
45 steel
inclusions
widmanstatten structure
