No abstract

The kinetics of nitrogen and carbon removal from a liquid iron surface in low content regions by blowing Ar gas mixture under reduced pressures have been studied using the samevacuum induction furnace at 1 6000c, respectively. The results obtained are as follows:(1)The nitrogen removal reaction is described as a second order reaction with respect to nitrogen content. The overall reaction rate constant, k~v' decreases with the increase of total pressure. and oxygen and sulfur content.Assumingthat the nitrogen removal reaction progresses by a mixed control and that the chemical reaction for nitrogen gas formation is caused by adsorbed nitrogen atoms, the chemical reaction rate constant, kã nd the adsorption coefficient of oxygen. The relation between kN.. of Fe-20mass"/oCr-0.2 mass"/*C-S system and as is shown in Fig. 3as Kishimoto et al.11) reported that the overall reaction rate constant for carbon removal, kc.., decreased with the decrease of carbon content at less than 0.005 masso/o.

No abstract

Annealing of a cold-rolled Fe-3.25%Si sheet having ͕111͖ ͗112͘ preferred orientation is performed in a high magnetic field in order to control microstructure orientation. Magnetic field (10 T) was applied in a direction parallel to the rolling direction. Distributions of orientation and misorientation of primary recrystallization grains in the magnetically annealed specimens are characterized with electron backscattering pattern analysis. Magnetic annealing is found to enhance the selection of ͗001͘ axis alignment parallel to the rolling direction in the ͕hk0͖ ͗001͘ recrystallization texture and to favor the occurrence of low energy grain boundaries in the recrystallized microstructure. The high frequency of low angle grain boundaries results in the appearance of coarse grains with traces of faint prior grain boundaries, suggesting extensive operation of the mechanism of grain coalescence. As a cause of selective formation of ͗100͘ grains in recrystallization, magnetostriction induced by applying a magnetic field is suggested.

No abstract