Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (44권5호 207-212)

The Change in Diffusion Coefficient and Wear Characteristic in Carbonitriding Layer of SCM415 Steel

침탄질화 처리된 SCM415강의 깊이에 따른 확산 및 마모특성 변화

이수연;윤국태;허석환;이찬규;
Lee, Su-Yeon;Youn, Kuk-Tea;Huh, Seok-Hwan;Lee, Chan-Gyu;

창원대학교 금속.신소재공학부;대구기계부품연구원;삼성전기;
Department of Metallurgy & Advanced Materials Engineering, Changwon National University;Daegu Machinery Institute of component & Materials;Samsung electro-mechanics;

DOI : 10.5695/JKISE.2011.44.5.207

Abstract

In this study, the change in diffusion coefficient and wear characteristic with depth in the carbonitriding layer of SCM415 steel was discussed. To determine the diffusion coefficient, depth profile of carbon was measured from the surface using the Glow Discharge Spectrometer. In otherwise, measurements of carbide fraction, micro vickers hardness of surface and observation of microstructure have been implemented through the SEM image. $Fe_3$(C,N) layer and effective depth were increased as the time for carbonitriding takes longer. According to wear experiment, the results showed that wear resistance was improved by $Fe_3$(C,N) layer and effective depth.

Keywords

Carbonitriding;Hardness;Microstructure;Diffusion coefficient;Surface carbon content;