플라즈마질화시 방전가스중 질소가스의 비율이 공구강(SKH51)의 질화층 및 미소경도에 미치는 영향

김덕재; 이해룡; 곽종구; 정우창; 조영래; Duk-Jae Kim; Hae-Ryong Lee; Jong-Gu Kwak; Uoo-Chang Chung; Young-Rae Cho

Korean Journal of Materials Research, Vol.12, No.6, 447-451, June, 2002

DOI10.3740/MRSK.2002.12.6.447 Export Citation

플라즈마질화시 방전가스중 질소가스의 비율이 공구강(SKH51)의 질화층 및 미소경도에 미치는 영향

Effects of Nitrogen Gas Ratio on Nitride Layer and Microhardness of Tool Steel(SKH51) in Plasma Nitriding

김덕재, 이해룡, 곽종구¹, 정우창², 조영래^{2, †}

고등기술연구원 재료공정연구실
¹한국원자력연구소
²부산대학교 금속공학과

Duk-Jae Kim, Hae-Ryong Lee, Jong-Gu Kwak¹, Uoo-Chang Chung², and Young-Rae Cho^{2, †}

Materials Processing Lab., IAE, Yongin P.O.Box 25, Kyonggi-Do, 449-020, Korea
¹Korea Atomic Energy Research Institute, 150 Duckjindong Yusonggu Daejeon, 305-353, Korea
²Pusan National University, Gumjung-Gu, Busan, Korea, 609-735

E-mail:

Pulsed DC-plasma nitriding has been applied to form nitride layer having only a diffusion layer. The discharge current with the variation of discharge gases is proportional to the intensity of N + 2 peak in optical emission spectroscopy during the plasma nitriding. The discharge current, microhardness in surface of substrate and depth of nitride layer increased with the ratio of N 2 toH 2 gas in discharge gases. When the ratio of N 2 toH 2 is lower than 60% in the discharge gases, high microhardness value of 1100Hv nitride layer which contains no compound layer has been formed.

Keywords:plasma nitriding;compound layer;diffusion layer;nitride layer

[References]

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[1] Zlatanovic M, Muenz WD, Surf. Coat. Technol., 41, 17 (1990)

[2] Spalvins T, J. Vac. Sci. Technol. A, 3, 2329 (1985)

[3] Brasbury SR, Lewis DB, Archer PM, Ahmed W, Surf. Coat. Technol., 91, 192 (1997)

[4] Sarwar M, Surf. Coat. Technol., 108-109, 612 (1990)

[5] Zlatanovic M, Surf. Coat. Technol., 48, 19 (1991)

[6] Kim BJ, Kim YC, Lee JJ, Surf. Coat. Technol., 114, 85 (1999)

[7] Wilson AD, Leyland A, Matthews A, Surf. Coat. Technol., 114, 70 (1999)

[8] Yilbas BS, Nizam SM, J. Mater. Process. Technol., 105, 352 (2000)

[9] Kim DJ, Cho YR, Lee MJ, Hong JM, Kim YK, Lee KH, Surf. Coat. Technol., 116-119, 906 (1999)

[10] Sun Y, Bell T, Mater. Sci. Eng. A, 224, 33 (1997)

[11] Buchhagen P, Bell T, Comput. Mater. Sci., 7, 228 (1996)

[12] Miola EJ, Souza SD, Dionysio MO, Spinellli D, Santos CA, Surf. Coat. Technol., 116-119, 347 (1999)

[13] Debal F, Bretagne J, Ricard A, Jumel M, Wautelet M, Dauchot JP, Hecq M, Surf. Coat. Technol., 98, 1387 (1998)

[14] Massalski TB, Binary Alloy Phase Diagrams, 3, 1729 (1990)

[15] Peter S, Richter F, Tabersky R, Konig U, Thin Solid Films, 377-378, 430 (2000)

[16] Lee UJ, 'Handbook of Metallic materials,' Gold, 242 (1997) (1997)

[17] Yang HY, Kim SY, 'Metallic materials,' Moon-Woon -Dang, 273 (1991) (1991)

[18] Bae GH, 'Plasma/Ion Nitriding,' Sam-Mi-Sa, 20 (1996) (1996)

[19] Editorial board in Sewha, 'Surface treatment of metals,' Se-Wha, 1125 (1990) (1990)

[20] Edenhoffer B, Conybear JG, Legge GT, 'Heat Treatment of Metals,' 1, 6 (1991) (1991)