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진공침탄한 SCM 415 강의 기계적 성질에 관한 연구
김대욱(D.W.Kim),이영제(Y.Z.Lee),임병수(B.S.Lim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_2
High cycle fatigue and dry wear characteristics of vaccum carburized low alloy steel, SCM415(0.149% C), were evaluated after various heat treatments including direct quenching, single reheat quenching and sub-zero treatment. Comparing the fatigue and wear characteristics of carburized specimens to those of hot annealed of reheat quenched specimens, the wear resistant property as well as bending fatigue limits of vacuum carburized steels were substantially superior to other heat treated steels. Test results indicated that the carburized and reheat treated specimens have higher fatigue limits than the carburized and direct-quenched specimens and the specimens followed by sub-zero treatment. The wear wolumes of sub-zero treated specimens with higher surface hardness show slightly lower values than those of non sub-zero treated specimens. This is attributed to the reduction of retained austenite amount of the surface and an increase of surface hardness by the sub-zero treatment effect.<br/>