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Influence of Carbon Content and Isothermal Heat Treatment Temperature on the Microstructure and Mechanical Properties of Ultra-High Strength Bainitic Steels
초고강도 베이나이트강의 미세조직과 기계적 성질에 미치는 탄소함량과 항온열처리 온도의 영향
Seung Hwangbo, Hong-Bum Lee, Young-Beum Song, Jinhee Ham, Hong-Kyu Kim, Dong-Woo Suh
황보승, 이홍범, 송영범, 함진희, 김홍규, 서동우
Korean J. Met. Mater. 2019;57(6):335-342.   Published online 2019 May 16
DOI: https://doi.org/10.3365/KJMM.2019.57.6.335

Abstract
The effect of carbon content and isothermal heat treatment conditions on the microstructure evolution and mechanical properties of ultra-high strength bainitic steels was investigated. A reduction in carbon content from 0.8 wt% to 0.6 wt% in super-bainite steel with typical chemistry effectively improved not only the Charpy impact toughness but..... More

                        
Formation of Delta Ferrite with Solidification Rates in 10Cr1MoW Steel
10Cr1MoW강에서 응고속도에 따른 δ 페라이트 형성거동
Suncheol Kwon, Yunkon Joo, Changhoon Sung, Myunggyun Son, Jongho Shin, Seongmoon Seo, Jehyun Lee
권순철, 주윤곤, 성창훈, 손명균, 신종호, 서성문, 이재현
Korean J. Met. Mater. 2018;56(8):589-596.   Published online 2018 Aug 5
DOI: https://doi.org/10.3365/KJMM.2018.56.8.589

Abstract
Martensitic 10Cr1MoW steels are widely used for high temperature components in turbine engines because they have good mechanical properties and corrosion resistance. Delta-ferrite can form locally in large ingots and the ferrite phase degrades the metal’s high-temperature properties. To decrease the fraction of delta-ferrite the solidification process should be controlled...... More

                        
Hot Deformation Behavior of As-cast Low Nickel Fe-22Cr-9.5Mn-3.3Ni Austenite Steel
니켈감량 Fe-22Cr-9.5Mn-3.3Ni 오스테나이트강 주조재의 고온 변형성
Sang Yeon Ahn, Jae Sook Song, Sun Ig Hong
안상연, 송재숙, 홍순익
Korean J. Met. Mater. 2017;55(7):477-485.   Published online 2017 Jul 4
DOI: https://doi.org/10.3365/KJMM.2017.55.7.477

Abstract
The hot deformation behavior of as-cast and homogenized Fe-22Cr-9.5Mn-3.3Ni stainless steel was investigated over a temperature range between 600~1,250 ℃. The deformability of the as-cast Fe-22Cr-9.5Mn-3.3Ni steel decreased with increasing temperature up to 850 ℃, and then increased at temperatures between 900 and 1200 ℃ caused by dynamic recrystallization at..... More

      
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