Behavior of Second-Phase Particles in IF Steels during Recrystallization Annealing Process
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摘要: 對IF鋼在退火過程中二相粒子的演變規律進行了研究,結果表明:退火以前形成的二相粒子,如TiC,在經過罩式退火和連續退火后,其尺寸、形狀和分布有較大的區別;在連續退火中不形成新的析出相,而在罩式退火中形成兩類新的析出相-FeTiP相和(Ti,Mn)S相。這是首次報道有關FeTiP相在含P,Mn較低(P ≤ 0.01%,Mn<0.2%)的IF鋼中析出,以及Mn以(Ti,Mn)S相的形式在罩式退火中析出。還著重研究了這2種新相的粒度、分布、相結構以及析出機制,并探討了它們對IF鋼大生產的意義。Abstract: The behavior of second-phase particles in IF steels during annealing prcx:ess was investigated in detail. The results show that the size* shape and dispersion of second-phase particles forming before annealing, such as TiC, change differently in batch annealing (BA) in comparison with continuous annealing (CA), and two kinds of second-phase particles not existing before annealing here, FeTiP and (Ti, Mn)S, precipitate in BA but not in CA. It has been rarely reported so far that FeTiP precipitates and Mn exists in (Ti, Mn)S form in IF steels with low P (≤ 0.01%) and low Mn (<0.2%) during BA. In addition, the dispersion, the phase structure of the two phases were studied, and their potential contribution to the production of IF steels through BA is also discussed.
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Key words:
- IF steels /
- continuous annealing /
- batch annealing /
- second-phase particles
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