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

조재현; 박학균; 손근수; 윤재홍; 김현수; 김창규; J.H. Cho; H.K. Park; K.S. Son; J.H. Yoon; H.S. Kim; C.G. Kim

Korean Journal of Materials Research, Vol.14, No.1, 52-58, January, 2004

DOI10.3740/MRSK.2004.14.1.052 Export Citation

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

A Study On the Sand Wear Resistance and Formation Behavior of Boride Layer Formed on Ni-Cr-Mo Steel by Plasma Paste Boronizing Treatment

조재현, 박학균¹, 손근수¹, 윤재홍^{1, †}, 김현수², 김창규³

(주)창원특수강
¹창원대학교 금속재료공학과
²한국전기연구원 전지연구그룹
³부경대학교 신소재공학부

J.H. Cho, H.K. Park¹, K.S. Son¹, J.H. Yoon^{1, †}, H.S. Kim², and C.G. Kim³

Changwon Specialty Steel Co., Ltd., Changwon 641-370, Korea
¹Dept. of Metallurgy and Materials Science, Changwon National University, Changwon, Korea
²Battery Research Group, KERI, Chnagwon 641-120, Korea
³Division of Materials Sceince and Engineering, Pukyong National University, Busan, Korea

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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.

Keywords:Plasma paste boronizing;Ni-Cr-Mo steel;FeB;Fe2B;X-ray diffraction test;Boride layer;Sand wear resistance

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[2] Jee YK, Changwon Univ. Master Dissertation (1994) (1994)

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[6] Lee SD, Changwon Univ. Master Dissertation (1995) (1995)

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