이용갑 문인기 최종술 2024-01-22T02:11:45Z 2024-01-22T02:11:45Z 2022-01-10 1982-11 0253-3847 https://pubs.kist.re.kr/handle/201004/148130 A study on the effect of heat treatment on the charpy impact toughness of AISI 4340 steel. Ni-Cr-Mo 강 (AISI 4340 강 ) 의 열처리에 따른 충격인성에 관한 연구 = Article 3 대한금속학회지 = Journal of the Korean Institute of Metals, v.20, no.11, pp.1000 - 1007 대한금속학회지 = Journal of the Korean Institute of Metals 20 11 1000 1007 austenitizing temperature tempering temperature AISI 4340 steel charpy impact toughness ductile to brittle transition temperature