| Title |
Prediction of Microstructure and Mechanical Properties of Hot Rolled C - Mn Steels |
| Authors |
이재곤(Jae Kon Lee) ; 이경종(Kyung Jong Lee) ; 권오준(Oh Joon Kwon) ; 강기봉(Ki Bong Kang) |
| Abstract |
The relationships between the microstructure and the mechanical properties of C-Mn steels were quantitatively analyzed. Specimens with various microstructure of ferrite, pearlite and bainite were manufactured both under isothermal and hot rolling conditions. Quantitative metallorgraphy and tensile test were performed, and the factors which influenced tensile properties were analyzed. The hardness of each phase formed during various thermomechanical conditions was primarily dependent on the chemical composition and the mean transformation temperature. The Hall-fetch type equation combined with the mixture rule were applied to obtain the relations between the microstructure and tensile properties. The tensile properties were formulated as functions of volume fraction and hardness of each phase and ferrite grain size. It was found that the predicted tensile properties were in reasonable agreements with measured ones. |