CAJ | 학술논문

某输送轻烃的高速泵（LMV311-75-69SCSS ）在间断运转2333小时后泵轴发生了断裂事故。本文对失效泵轴的化学成分、硬度、金相组织、断口进行了检验和分析，结果发现该泵轴材质成分不均匀，材料组织内形成带状偏析，导致材料轴向强度不足；并详细剖析了此类非金属夹杂物对泵轴失效的影响因素。综合分析认定泵轴由于材料本身的缺陷导致了疲劳断裂。为避免泵轴再次发生断裂文中提出了相应的改进措施。
모수송경경적고속빙（LMV311-75-69SCSS ）재간단운전2333소시후빙축발생료단렬사고。본문대실효빙축적화학성분、경도、금상조직、단구진행료검험화분석，결과발현해빙축재질성분불균균，재료조직내형성대상편석，도치재료축향강도불족；병상세부석료차류비금속협잡물대빙축실효적영향인소。종합분석인정빙축유우재료본신적결함도치료피로단렬。위피면빙축재차발생단렬문중제출료상응적개진조시。
A high-speed light hydrocarbon pump (LMV311-75-69SCSS) shaft fracture accident occurred in the 2 333 hours of intermit-tent operation of the process .The testing and analysis on the chemical composition ,hardness ,microstructure ,fracture of the failed shaft , it’s shown that the main reason for failure in the shaft as a material inequality caused the banded segregation ,leading to lack of axial strength .And a detailed analysis of influencing factors of non -metaillic inclusions on the pump shaft failure is given in the paper .The final inspection found that fatigue fracture in the shaft resulted from the defects of the material itself .In order to avoid recurrence improvement measures have been proposed .