Effects of Alloying Elements and Cooling Rate on Austenite Grain Growth in Solidification and the Subsequent Cooling Processes of Low Alloy Steels

• DOI: 10.2355/tetsutohagane1955.73.14_1738
• Publication Date: 2017-04-30T18:15:49Z
• Authors: Kunio YASUMOTO; Tsuneaki NAGAMICHI; Yasuhiro MAEHARA; Koki GUNJI
• Keywords: 0205 materials engineering; 02 engineering and technology

Effects of alloying elements and cooling rate on γ grain growth behavior in the solidification subsequent processes low alloy steels have been studied relation to surface cracking continuously cast (CC) slabs.Grain phase occurs rapidly below a completion temperature transformation into (Tγ ), since strong pinning effect second such as δ-ferrite and/or liquid boundary migration disappears. Thus size as-cast can mainly be determined by Tγ, i.e., maximum is obtained at peritectic composition, expected from Fe-C diagram. The carbon concentration point significantly shifted addition elements. coefficient kx shifting was separately for Mn, Ni, Si, Cr S. Using element X, equivalent (Cp) perifectic reaction written additively asCp= C+Σikxi·XiIn same grains are largely refined increasing because effects decrease Tγ suppress Tγ.