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J. Ocean Eng. Technol. 2009;23(2):74-80.    

A Study on the Mechanical Properties by High-Frequency Induction Hardening of SCM440 Steel
Ahn Seok-Hwan,Nam Ki-Woo,Kim Tae-Il,Lee Mun-Yong,Kim Dong-Kyu
School of Mechanical Engineering Pukyong National University,Division of Materials Science and Engineering Pukyong National University,Sungwoo Hitech Co. LTD.,Sungwoo Hitech Co. LTD.,Sungwoo Hitech Co. LTD.
고주파 담금질에 의한 SCM440강의 기계적 특성에 관한 연구
안석환,남기우,김태일,이문용,김동규
부경대학교 기계공학부,부경대학교 신소재공학부,(주)성우하이텍,(주)성우하이텍,(주)성우하이텍
Copyright © 2009 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: SCM440 steel, Mechanical property, High-frequency induction hardening, Fatigue, S-N curve, Hardness, Wear
핵심용어: SCM440강, 기계적 특성, 고주파담금질, 피로, S-N 곡선, 경도, 마모
Abstract
Surface hardening treatments, such as using the high-frequency induction hardening method, are widely used to increase the fatigue life and prevent the failure of materials by locally increasing the surface hardness. This method, in particular, brings an improvement in static strength by compressive residual surface stress due to the hardening. In this study, the mechanical properties of high-frequency induction hardened SCM440 steel were investigated. These results were also compared with those for base metal and a Q/T (tempering after quenching) treatment specimen. The test results showed that partially high-frequency induction hardened SCM440 steel specimens were more improved in static strength, surface hardness, fatigue limit, and anti-wear than the base metal and Q/T treatment specimens. In particular, the fatigue limit of the high-frequency induction hardened SCM440 steel increased by more than about 52% compared to that of base metal and by about 25% compared to that of the Q/T specimen.


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