TY - JOUR
T1 - Size distribution of multi-phase deoxidation particles for heterogeneous crystallization of TiN and solidification structure in ti-added ferritic stainless steel
AU - Ito, Akihisa
AU - Suito, Hideaki
AU - Inoue, Ryo
PY - 2012
Y1 - 2012
N2 - Single (Ti and Mg) and multiple (Ti/M: M=Mg, Ca, Zr or Ce and Ti/M/M': Ti/Mg/Al, Al/Mg/Ti, Al/Ti/Ca, Ti/ Al(Ca)/Ca(Al), Ti/Mg(Ca)/Ca(Mg), Ti/Zr/Ca(Mg) or Ti/Ce/(Ca) deoxidations were carried out at 1 600°C to study the effect of TiN crystallization on the solidification structure in an Fe-17.5(11)%Cr-0.25%Mn-0.20%Si-0.2 to 0.3%Ti-0.01%C alloy containing 0.0030 to 0.04 ppm N on a mass percent basis. Planar size distributions of TiN, TiN+oxide and oxide particles above 1.5 μ m in size and spatial size distributions of particles with different compositions greater than 0.1 μ m in size were measured and the characteristics of these size distributions have been discussed. The crystallization and precipitation of TiN and TiN on oxide particles were studied as functions of particle number, [Ti]·[N] solubility product and composition of the deoxidation particles. It was found that the solidification structure was not influenced by the number of TiN and TiN+oxide particles of size greater than 1.5 μ m, but by the deoxidation method. A very fine structure was observed in Ti/Mg, Ti/Mg/Al and Ti/Mg(Ca)/Mg(Ca) deoxidations and a fine structure was observed in Ti(Al)/Al(Ti)/Ca deoxidation using a MgO crucible both with and without the presence of CaO-MgO-Al2O3 slag.
AB - Single (Ti and Mg) and multiple (Ti/M: M=Mg, Ca, Zr or Ce and Ti/M/M': Ti/Mg/Al, Al/Mg/Ti, Al/Ti/Ca, Ti/ Al(Ca)/Ca(Al), Ti/Mg(Ca)/Ca(Mg), Ti/Zr/Ca(Mg) or Ti/Ce/(Ca) deoxidations were carried out at 1 600°C to study the effect of TiN crystallization on the solidification structure in an Fe-17.5(11)%Cr-0.25%Mn-0.20%Si-0.2 to 0.3%Ti-0.01%C alloy containing 0.0030 to 0.04 ppm N on a mass percent basis. Planar size distributions of TiN, TiN+oxide and oxide particles above 1.5 μ m in size and spatial size distributions of particles with different compositions greater than 0.1 μ m in size were measured and the characteristics of these size distributions have been discussed. The crystallization and precipitation of TiN and TiN on oxide particles were studied as functions of particle number, [Ti]·[N] solubility product and composition of the deoxidation particles. It was found that the solidification structure was not influenced by the number of TiN and TiN+oxide particles of size greater than 1.5 μ m, but by the deoxidation method. A very fine structure was observed in Ti/Mg, Ti/Mg/Al and Ti/Mg(Ca)/Mg(Ca) deoxidations and a fine structure was observed in Ti(Al)/Al(Ti)/Ca deoxidation using a MgO crucible both with and without the presence of CaO-MgO-Al2O3 slag.
KW - Ferritic stainless steel
KW - Particle size distribution
KW - Primary and secondary deoxidation product
KW - TiN crystallization
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U2 - 10.2355/isijinternational.52.1196
DO - 10.2355/isijinternational.52.1196
M3 - Article
AN - SCOPUS:84864976853
VL - 52
SP - 1196
EP - 1205
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 7
ER -