Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (30권3호 167-174)

Change of Surface Characterisstics of Cemented Carbide by Nitriding

초경합금의 플라즈마 질화처리에 의한 표면물성 변화

김기호;

충북대학교 재료공학과;

Abstract

WC-C0 base cemented carbides were plasma nitrided to obtain more hadened surface layer. The surface hardness of Hv1338 which is higher than a non-treated ane by 30%, and the hardened layer thickness of about 50$mu extrm{m}$ were obtained by the treatment of 3hrs under the conditions of $550^{circ}C$, and 5torr of gas pressure of which composition was 1:1 of $N_2:H_2$. The nitrided surfaces has WIN and W2N phases in the non-coated samples and AIN phase in the alumina coated sampled as the results of X-ray results, and showed surface roughnness of 5$mu extrm{m}$ which were caused by the sputtering action of the plasma gasee. The hardenened layer exihibits an enhanced wear resistance the cuttability test.

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