화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.30, No.4, 184-196, April, 2020
DOI10.3740/MRSK.2020.30.4.184  Export Citation
HSLA 강의 미세조직과 저온 샤르피 충격 특성에 미치는 탄소와 니켈의 영향
Effect of Carbon and Nickel on Microstructure and Low Temperature Charpy Impact Properties of HSLA Steels
엄해원1, 조성규2, 조영욱2, 신건철3, 권용재3, 이정구3, 신상용1, 3, †
  • 1울산대학교 중공업융합기술공학과
  • 2현대제철 R&D Center
  • 3울산대학교 첨단소재공학부
Haewon Eom1, Sung Kyu Cho2, Young Wook Cho2, Yongjai Kwon3, Yongjai Kwon3, Jung Gu Lee3, and Sang Yong Shin1, 3, †
  • 1Department of Convergence Technology for Heavy Industries, University of Ulsan, Ulsan 44610, Republic of Korea
  • 2Technical Research Center, Hyundai Steel Company, Dangjin 31719, Republic of Korea
  • 3School of Materials Science and Engineering, University of Ulsan, Ulsan 44610, Republic of Korea
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In this study, effects of carbon and nickel on microstructure and low temperature Charpy impact properties of HSLA (high strength low alloy) steels are investigated. To understand the complex phase transformation behavior of HSLA steels with high strength and toughness before and after welding processes, three kinds of HSLA steels are fabricated by varying the carbon and nickel content. Microstructure analysis, low temperature Charpy impact test, and Vickers hardness test are performed for the base metals and CGHAZ (coarse-grain heat affected zone) specimens. The specimens with the lowest carbon and nickel content have the highest volume fraction of AF, the lowest volume fraction of GB, and the smallest GB packet size. So, the low temperature Charpy absorbed energy of the CGHAZ specimen is the highest. The specimens with increased carbon and nickel content have the lowest volume fraction of AF, the highest volume fraction of GB, and the largest GB packet size. So, the low temperature Charpy absorbed energy of the CGHAZ specimen is the lowest.
Keywords:HSLA steel;carbon;nickel;microstructure;charpy impact properties
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