Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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The Effect of Boronizing on the Magnetization Behaviour of Low Carbon Microalloyed Steels

  • Calik, Adnan (Suleyman Demirel University, Faculty of Technology, Manufacturing Engineering Department) ;
  • Karakas, Mustafa Serdar (Suleyman Demirel University, Faculty of Technology, Manufacturing Engineering Department) ;
  • Ucar, Nazim (Suleyman Demirel University, Faculty of Science and Arts, Physics Department) ;
  • Aytar, Omer Baris (Suleyman Demirel University, Faculty of Science and Arts, Physics Department)
  • Received : 2011.12.14
  • Accepted : 2012.04.18
  • Published : 2012.06.30
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Abstract

The change of saturation magnetization in boronized low carbon microalloyed steels was investigated as a function of boronizing time. Specimens were boronized in an electrical resistance furnace for times ranging from 3 to 9 h at 1123 K. The metallurgical and magnetic properties of the specimens were investigated using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and vibrating sample magnetometry (VSM). A boride layer with saw-tooth morphology consisting of FeB and $Fe_2B$ was observed on the surface, its thickness ranged from 63 ${\mu}m$ to 140 ${\mu}m$ depending on the boronizing time. XRD confirmed the presence of $Fe_2B$ and FeB on the surface. The saturation magnetization decreased with increasing boronizing time. This decrease was attributed to the increased thickness of the FeB and $Fe_2B$ phases. Cracks were observed at the FeB/$Fe_2B$ interfaces of the samples. The number of interfacial cracks increased with increasing boronizing time.

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References

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