微觀偏析模型在碳鋼內裂紋敏感性分析中應用

Theoretical Model of Micro-segregation and Its Application in Analysis on Internal Crack Susceptibility of Carbon Steel

摘要: 研究了微觀偏析的理論模型對碳鋼連鑄過程中內裂紋的敏感性.模型中考慮了鐵素體(δ)凝固向奧氏體(γ)凝固的轉化過程,以及MnS的析出.主要討論了鋼中C,Mn,S,P對凝固過程中晶間偏析、零強度溫度(ZST)、零塑性溫度(ZDT)的影響.

Abstract: The intemal crack susceptibility of carbon steel was studied by using a micro-segregation model in which the transition of fewhic/austenitic solidification and the precipitation of MnS were considered. The effects of C, Mn, S, and P on the interdendrihc segregation, zero strength temperature(ZST), and zero ductility temperature (ZDT) of the steel were discussed.