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Development of 1.2 GPa Ferrite-based Lightweight Steels via Low-temperature Tempering
저온 템퍼링을 이용한 1.2 GPa급 페라이트계 경량철강 개발
Hyo Ju Bae, Kwang Kyu Ko, Hyoung Seok Park, Jae Seok Jeong, Jung Gi Kim, Hyokyung Sung, Jae Bok Seol
배효주, 고광규, 박형석, 정재석, 김정기, 성효경, 설재복
Korean J. Met. Mater. 2021;59(10):683-691.   Published online 2021 Sep 6
DOI: https://doi.org/10.3365/KJMM.2021.59.10.683

Previously reported low-Mn ferritic-based lightweight steels are potential candidates for industrial applications, however, they typically exhibit lower strength, with < 1 GPa and lower strength-ductility balance, than medium- and high-Mn austenitic lightweight steels. Herein, we introduce a low-temperature tempering-induced partitioning (LTP) treatment that avoids the strength-ductility dilemma of low-Mn ferriticbased..... More

Effects of Tempering Condition on the Microstructure and Mechanical Properties of 30MnB5 Hot-Stamping steel
핫스탬핑용 30MnB5강의 템퍼링 조건에 따른 미세조직 및 기계적 물성 연구
Junyeong Jeong, Sang-Cheon Park, Ga-Young Shin, Chang Wook Lee, Tae-Jeong Kim, Min-Su Choi
정준영, 박상천, 신가영, 이창욱, 김태정, 최민수
Korean J. Met. Mater. 2018;56(11):787-795.   Published online 2018 Nov 5
DOI: https://doi.org/10.3365/KJMM.2018.56.11.787

The effects of tempering condition on the microstructure and mechanical properties of 30MnB5 hot stamping steel were investigated in this study. Before the tempering, hot-stamped 30MnB5 steel was composed of only α′-martensite microstructure without precipitates. After the tempering at 180 ℃ for 120 min, nano-sized ε-carbides were precipitated in the..... More

                           Cited By 7
Effects of Cooling Rate by Double Austenitizing Tempering Treatment on the Microstructure and Mechanical Properties in Low Alloy Steel
저합금강의 이중 오스테나이징 템퍼링에서 냉각 속도에 따른 미세조직 및 기계적 특성 변화
Gyeong-Hoo Kim, Jae-Ho Jang, Sung-Hwan Kim, Byung-Jun Kim, Keun-Yong Sohn, Dae-Geun Nam
김경후, 장재호, 김성환, 김병준, 손근용, 남대근
Korean J. Met. Mater. 2017;55(8):559-565.   Published online 2017 Aug 1
DOI: https://doi.org/10.3365/KJMM.2017.55.8.559

Spent nuclear fuel is stored and transported in cask bodies, but they become embrittled with the passage of time resulting in lattice defects due to neutron irradiation. Cask bodies made by the quenching and tempering (QT) treatment are not safe and are hard to store because of embrittlement caused by..... More

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