Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2006.05a
- /
- Pages.172-175
- /
- 2006
Effects of TMCP on the microstructure and mechanical properties of low carbon HSLA steels
저탄소.저합금 강의 미세구조 및 기계적 성질에 미치는 가공 열처리 조건의 영향
- Kang, J.S. ;
- Huang, Yusen ;
- Lee, C.W. ;
- Park, C.G.
- 강주석 (포항공과대학교 신소재공학과) ;
- ;
- 이창우 (포항공과대학교 신소재공학과) ;
- 박찬경 (포항공과대학교)
- Published : 2006.05.11
Abstract
Effects of deformation at austenite non-recrystallization region and cooling rate on the microstructure and mechanical properties of low carbon (0.06 wt. %) high strength low alloy steels have been investigated. Average grain size decreased and polygonal ferrite transformation promoted with increasing deformation amount due to increase of ferrite nucleation site. As cooling rate increased, the major microstructure changed from polygonal ferrite to acicular ferrite and the fraction of M/A constituents gradually increased. Discontinuous yielding occurred in highly deformed specimen due to the formation of polygonal ferrite. However, small grain size of highly deformed specimen caused lower ductile-to-brittle transition temperature than slightly deformed specimen.