|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||137 Effects of Coiling Temperature on the Mechanical Properties and Microstructures of Low Alloy Martensitic Steels
||Duhan Kim, Eunji Yu, Sung-Kyung Han, Sung-Ju Kim, Jongryoul Kim
|On-Site Speaker (Planned)
The relationship between mechanical properties and microstructures of high strengthen hot-rolled steels were investigated by the change of their coiling temperature. Low carbon steel containing 1.2 wt% Mn was normalized at 1200 ℃, hot-rolled at continuous milling line, and then was water cooled down to the coiling temperature. With the increase of the coiling temperature, the tensile strength was decreased by the formation of ferrite phase and the substructural changes inside lath martensite, which resulted in the increase of the elongation. A more detailed study on the relationship between mechanical properties and microstructures was conducted by scanning electron microscopy, electron backscattered diffraction and transmission electron microscopy. The optimum microstructure for high strength and ductility martensitic steel will be suggested.