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[재료부문] SACM 645강의 이온질화처리와 기계적 성질
원성준(Sung Joon Won),임병수(Beyung Soo Lim),하재용(Jae-Yong Ha),남기석(Kee-Seok Nam) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, the effects of plasma ion nitriding times on the mechanical properties of SACM 645 steel were investigated. The specimens were plasma ion nitrided for 0 hr., 40 hr., 70 hr., and 90 hr. The fatigue strength, microhardness and effective case depth for each type of specimens were measured through the rotary bending fatigue test. The 40 hr., 70 hr. and 90 hr. plasma ion nitrided specimens had the fatigue strength of 3.48 x 10², 4.57 X 10² and 4.64 x 10² respectively. The relationship between fatigue strengths of plasma ion nitrided specimens and nitriding time was investigated. Also, the microhardness tests were conducted to measure the effective case depths