CAJ | 학술논문

采用光学显微镜、扫描电子显微镜、布氏硬度测试仪和有限元仿真软件对铁路电气用某失效定位线夹进行了测试分析。结果表明，该定位线夹的开裂失效是由于压板在金属模锻过程中发生折叠，折叠过程带入了金属表层的氧化物，使材料内部结合力降低，在螺栓预紧力作用下压板折叠部分发生了开裂。因此，定位线夹在锻造过程中应设计合理的锻造工艺并加强质量监控，防止锻造缺陷的产生。
채용광학현미경、소묘전자현미경、포씨경도측시의화유한원방진연건대철로전기용모실효정위선협진행료측시분석。결과표명，해정위선협적개렬실효시유우압판재금속모단과정중발생절첩，절첩과정대입료금속표층적양화물，사재료내부결합력강저，재라전예긴력작용하압판절첩부분발생료개렬。인차，정위선협재단조과정중응설계합리적단조공예병가강질량감공，방지단조결함적산생。
Use optical microscopy,scanning electron microscope,brinell hardness tester and finite element simulation software to test and analyse cracking failure for positioning clamp of electric railway.The results indicate that cracking fail-ure is due to the platen folded in the metal forging process,and bring into metal surface oxide in the forging process,thus the binding force between the metal is reduced,and then the folded portion of the platen is rupture in the role of the bolt preload.Therefore,we should design reasonable forging process and strengthen quality control during the forging process for positioning clamp to prevent the forging defect.