Effect of phosphorus on the microstructure and mechanical properties of strip cast carbon steel

Na Li~(1)),Zhen-yu Liu~(2)),Guo-ping Zhou~(2)),Xiang-hua Liu~(2)),and Guo-dong Wang~(2)) 1) School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China 2) The State Key Laboratory of Rolling and Automation,Northeast University,Shenyang 110819,China

摘 要：<正>Carbon steel strips with different phosphorus and carbon contents were produced by using the twin roll strip casting process.Fine grains and dendrite structure were observed in high-P steels.Negative phosphorus segregation was found in strip cast high-P and high-C steels.For the steels with different carbon contents,phosphorus distribution in the thickness direction of the strip is obviously different.This is because solutes are redistributed in the melting pool and the phosphorus segregation rate is associated with the length of the mushy zone and the phosphorus solubility in different phases.Phosphorus as a solute in ferrite can lead to the higher hardness and strength with lower plastic propertyies.

关键词：