다이아몬드 공구용 코발트계 합금 결합제의 제조 및 기계적 성질

이기선; 정승부; Kee Sun Lee; Seung Boo Jung

Korean Journal of Materials Research, Vol.10, No.8, 532-539, August, 2000

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다이아몬드 공구용 코발트계 합금 결합제의 제조 및 기계적 성질

Fabrication Process and Mechanical Properties of Co-based Metal Bond in Diamond Impregnated Tools

이기선 , 정승부¹

공주대학교 공과대학 신소재공학부
¹성균관대학교 공과대학 금속재료 공학부

Kee Sun Lee , and Seung Boo Jung¹

Division of Advanced Materials Engineering, Kongju National University, Kongju, 314-701, Korea
¹School of Metallurgical and Materials, Sungkyunkwan University, Suwon, 440-746, Korea

초록

amond 공구용 Co-0.5C-(15∼20)Cr-20Ni-8W-(2∼7)Fe 합금 결합제를 볼밍링(ball-milling)법과 기계적 합금화(mechanical alloying) 법으로 합성하였다. stearic acid의 첨가 유무에 상관없이 Co-0.5C-(15∼20)Cr-20Ni-8W-(2∼7)Fe 합금의 경우 6시간 동안 합금화된 금속 분말에서 미세 접합(micro welding) 형상이 균일하게 관찰되었다. stearic acid를 첨가하지 않을 때는 부분적으로 조대화된 분말이 형성되었으나 2% 첨가한 경우 미세하고 판상의 분말이 얻어졌다. stearic acid가 첨가된 복합분말을 열간 압축하여 기계적 성질을 평가한 결과 굽힘강도 1100MPa, 경도 46H(sub)Rc의 특성을 나타냈다.

Co-0.5C-(15~20)Cr-20Ni-8W-(2~7)Fe alloy bond in diamond-impregnated abrasive tool was synthesized by ball-milling and mechanical alloying process. When the powders were mechanical alloyed for 6h, micro-welding in most metal powders was observed irrespective of addition of stearic acid. Without stearic acid in metal powders, partial-ly coarse powders were obtained, which could be unfaverable to the densification of composite of composite powders. The hot-pressed compacts showed rupture strength of 1100MPa and hardness of about 46H RC , respectively.

Keywords:Co metal bond;Mechanical alloying;Hot pressing;Metal bond

[References]

李種文, 機械工業/ v.23, no.6, pp.88, 1993 (1993)
Dwan JD, Mater. Sci. Technol., 14, 896 (1998)
German RM, Powder Metallurgy Science, 209 (1984)
Konstanty J, Ind. Diamond Rev., 51(1), 27 (1991)
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Kuzucu V, Ceylan M, Celik H, Aksoy I, J. Materials Processing Technology, 74, 141 (1998)
Mehan RL, Hibbs IE, Ind. Diamond Rev., 44, 128 (1984)
Bex PA, Shafto GR, Ind. Diamond Rev., 44, 128 (1984)

[Related Articles]

[1] 李種文, 機械工業/ v.23, no.6, pp.88, 1993 (1993)

[2] Dwan JD, Mater. Sci. Technol., 14, 896 (1998)

[3] German RM, Powder Metallurgy Science, 209 (1984)

[4] Konstanty J, Ind. Diamond Rev., 51(1), 27 (1991)

[5] Tanaka T, Int. J. JSPE, 26(1), 27 (1992)

[6] LENEL FV, Powder metallurgy principles and applications/ Metal Powder Industries Federation, pp.492, 1980 (1980)

[7] Kuzucu V, Ceylan M, Celik H, Aksoy I, J. Materials Processing Technology, 74, 141 (1998)

[8] Mehan RL, Hibbs IE, Ind. Diamond Rev., 44, 128 (1984)

[9] Bex PA, Shafto GR, Ind. Diamond Rev., 44, 128 (1984)