Grain Boundary Segregation of Phosphorus in High Strength IF Steel during Recrystallization Annealing

摘要：

The cold rolled(reduction of 75%) phosphorus-bearing IF steels of 1 mm thickness were recrystallization annealed for different times at 810℃. The microstructure,grain sizes,coincident site lattice (CSL)and segregation of p atoms on grain boundaries were researched for the annealed IF steel by optical microscopy(OM)and scanning electron．microstrueture(SEM)and high resolution transmission electron microstrueture(HRTEM). The reslllts showed that the steel finished reerystallization completely after the cold steels sheet were annealing for 180 s,360 s and 600 s respectively at 810℃. The grain size became larger with increasing the annealing time．Most of the CSL were ∑3 and there were also Σ7 and ∑9 and∑11 and∑19a et a1. The grain boundary broadened and there were higher density dislocations and P atoms and phosphide on grain boundary after the IF steels were annealed. The amount of P segregated on grain boundary increased with increasing the annealing time．

关键词： high strength IF steel recrystallization grain boundary segregation

作者: Song Xinli Yuan Zexi Li Pinghe Wang Di Deng Zhaojun Jia Juan

作者单位: Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education.Wuhan Unive Iron and Steel Research Center,Wuhan Iron and Steel Group Corporation,Wuhan 430080,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Automobile Steel(2009年汽车用钢生产及应用技术国际研讨会)

会议地点: 大连

会议语种:英文

页码: 288-292

在线出版日期: 2009-09-06（万方平台首次上网日期，不代表论文的发表时间）