Effects of deformation and boron on microstructure and continuous cooling transformation in low carbon HSLA steels
SCIE
SCOPUS
- Title
- Effects of deformation and boron on microstructure and continuous cooling transformation in low carbon HSLA steels
- Authors
- Jun, HJ; Kang, JS; Seo, DH; Kang, KB; Park, CG
- Date Issued
- 2006-04-25
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- The continuous-cooling-transformation (CCT) diagram and continuous cooled microstructure were investigated for low carbon (0.05 wt.% Q high strength low alloy steels with/without boron. Microstructures observed in continuous cooled specimens were composed of pearlite, quasi-polygonal ferrite, granular bainite, acicular ferrite, bainitic ferrite, lower bainite, and martensite depending on cooling rate and transformation temperature. A rapid cooling rate depressed the formation of pearlite and quasi-polygonal ferrite, which resulted in higher hardness. However. hot deformation slightly increased transformation start temperature, and promoted the formation of pearlite and quasi-polygonal ferrite. Hot deformation also strongly promoted the acicular ferrite formation which did not form under non-deformation conditions. Small boron addition effectively reduced the formation of pearlite and quasi-polygonal ferrite and broadened the cooling rate region for bainitic ferrite and martensite. (c) 2005 Elsevier B.V. All rights reserved.
- Keywords
- continuous phase transformation; CCT diagram; MORPHOLOGY; BEHAVIOR; BAINITE; TI
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24008
- DOI
- 10.1016/j.msea.2005.05.008
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 422, no. 1-2, page. 157 - 162, 2006-04-25
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