摘要
某泥浆泵动力端35CrMo钢被动轴在工作过程中发生断裂失效。通过宏观观察、化学成分分析、力学性能测试、扫描电镜分析、金相检验、夹杂物和疏松缺陷分析等方法对被动轴断裂失效原因进行了分析。结果表明:泥浆泵动力端被动轴心部存在大量的枝晶组织、夹杂物与孔隙疏松等缺陷及不均匀组织,这显著降低了被动轴的力学性能,这是造成被动轴过载脆性断裂失效的主要原因。
Fracture failure of 35CrMo steel driven shaft at the power end of a mud pump occurred during operation.The failure causes of driven shaft were analyzed by means of macroscopic observation,chemical composition analysis,mechanical property test,scanning electron microscope analysis,metallographic examination,inclusion and loose defect analysis.The results show that there were a lot of defects and inhomogeneous structures in the center of the driven shaft of the power end of the mud pump,such as dendrite structure,inclusions and porosity,which significantly reduced the mechanical properties of the driven shaft,which was the main reason for the overload brittle fracture failure of the driven shaft.
作者
高学平
GAO Xueping(The Testing and Manufacturing Platform for Advanced Materials,School of Materials Science and Engineering,Shandong University,Jinan 250061,China)
出处
《理化检验（物理分册）》
CAS
2020年第3期43-47,共5页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
