Effect of Ca on Grain Size and Toughness in CGHAZ of C-Mn Steel
Through adding enough calcium to C-Mn steel, the second phase particles of CaO can be found in C-Mn steel. The microstructure, the grain size and the toughness of CGHAZ in micro-calcium steel and no micro-calcium steel were studied by TEM, SEM and series impact experiment. The research shows that: the second phase particles CaO in micro-calcium steel have strong pinning force to grain boundary of CGHAZ; the second phase particles can retard grain growth in the course of welding in micro-calcium steel, fining grain at CGHAZ and improving the toughness of CGHAZ in micro-calcium steel.
Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu
K. N. Jia "Effect of Ca on Grain Size and Toughness in CGHAZ of C-Mn Steel", Advanced Materials Research, Vols. 291-294, pp. 886-889, 2011