Microstructure and Precipitates of High-pure Ferritic Stainless Steels Stabilized by Niobium and Titanium
As stabilization elements added into ferritic stainless steels,various kinds of precipitates of niobium and titanium will form and have great effect on their microstructure,which has great effect on the mechanical and corrosion properties of the final products.Combined with thermodynamic calculation by FactSage software,microstructure and precipitates of ferritic stainless steels containing different niobium and titanium were investigated by optical microscope,scanning electron microscope,transmission electron microscope and energy dispersive spectrometer.The results show that titanium mainly exists in form of TiN but niobium exists mainly in form of NbC.Moreover,a certain amount of NbN particles precipitate when there is not enough titanium to react with nitrogen.TiN particles with size of 2μm~8μm promote the recrystallization but Nb-rich precipitates with size of less than 500nm suppress the recrystallization in the process of annealing.
High-pure ferritic stainless steel Microstructure Precipitate Stabilization
Hongpo Wang Bo Peng Lifeng Sun Chengjun Liu Maofa Jiang
College of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
7-12
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）