Fracture Analysis of High Carbon Steel during Drawing
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摘要: 就72A高碳钢在拉拔至ƒ0.2~ƒ0.25mm过程中出现的断丝,用电子探针扫描电镜(EMS)分析其断面。分别从断面形状和断面中夹杂物的成分两方面进行分析,并采用电子探针点扫描和面扫描找出了断裂的形式和原因。最终得出结论:脆性夹杂物是导致拉断的主要原因,另外,中心偏析和表面缺陷也会引起断裂。并提出了解决方案。Abstract: The failure fracture of the high carbon steel during drawing to ƒ0.2~ƒ0.25mm was analyzed by scanning electron microscope. The fracture shape and the inclusion composition of the fracture were analyzed respectively. The forms and the reasons of the fracture were found out by adopting the point scanning and the surface scanning of the electron probe. The results show that the brittle inclusion is the main reason of causing the fracture, and the central segregation and surface defect may also result in the fracture. The solutions of fracture are put forward.
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Key words:
- high carbon steel /
- drawing /
- inclusion /
- segregation /
- fracture /
- EMS
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