Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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A Study On the Sand Wear Resistance and Formation Behavior of Boride Layer Formed on Ni-Cr-Mo Steel by Plasma Paste Boronizing Treatment

Plasma Paste Boronizing법에 의한 Ni-Cr-Mo강의 붕화물층 생성거동과 내 토사마모특성에 관한 특성

  • 조재현 ((주)창원특수강) ;
  • 박학균 (창원대학교 금속재료공학과) ;
  • 손근수 (창원대학교 금속재료공학과) ;
  • 윤재홍 (창원대학교 금속재료공학과) ;
  • 김현수 (한국전기연구원 전지연구그룹) ;
  • 김창규 (부경대학교 신소재공학부)
  • Published : 2004.01.01
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Abstract

The surface property and formation behavior of a boride layer formed on Ni-Cr-Mo steel in a plasma paste boronizing treatment were investigated. The plasma paste boronizing treatment was carried out at 973～1273 K for 1-7 hrs under the gas ratio of Ar:H$_2$ (2:1). The thickness of the boride layer increased with increasing temperature and time in the boronizing treatment. The cross-section of the boride layer was a tooth structure and the hardness was Hv 2000～2500. XRD analysis revealed that the compound was identified as FeB, $Fe_2$B, and mixed phase of FeB/$Fe_2$B in the boride layer formed at 973～1073 K, 1173K, and 1273K, respectively. The Ni-Cr-Mo alloy boronized at 1173-1273 K showed the best excellent wear resistance against the sand. As a results of corrosion test in 1 M $H_2$$SO_4$ solution, $Fe_2$B formed on the matrix alloy exhibited higher corrosion resistance than FeB.

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References

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