맹선재 정순효 2024-01-22T01:08:50Z 2024-01-22T01:08:50Z 2022-01-10 1988-11 https://pubs.kist.re.kr/handle/201004/147531 Spherodization and cold forgeability of 4140 steel by two stage heat treatment. 2 단계 열처리에 의한 4140 강의 구상화와 냉간단조성 = Article 3 대한금속학회지 = Journal of the Korean institute of metals, v.v. 26, no.no. 11, pp.1068 - 1074 대한금속학회지 = Journal of the Korean institute of metals v. 26 no. 11 1068 1074 4140 steel cold forgeability spherodization two stage heat treatment