Effect of Carbon and Chromium Contents on Latent Heat of Pearlite Transformation of Steels

A New Drying Process of Dusts and Sludge by Employing Heat Storage Materials

“…In general, specific heat capacity of iron-based alloy is about 0.5 kJ/(kg ·°C), and therefore, the latent heats of the solid-solid phase transformations are in the range of several tens of percentages of the sensible heat held by HSM of 500°C. For example, magnetic transformation of pure iron and a eutectoid transformation of an austenite steel will occur at around 770°C 3) and 730°C, 3) respectively, and the corresponding latent heats are approximately 20 kJ/kg 3) and 83 kJ/kg, 3) respectively. Although, these temperatures are higher than those of the target exhaust gas, it will be lowered by the adjustment of composition of the alloys.…”

“…Assuming that the volume fraction of steel balls occupied in the rotary dryer is about 5 % and the average residence time of HSM ball and wet dust are as 175 s, the inside volume of the dryer is necessary to be 13 m 3 , e.g., 2 m in inside diameter and 4 m in length. In this case, the holdup of the steel balls is calculated as about 5ϫ10 3 kg. Figure 13 shows the moisture content distributions in the rotary dryer with and without consideration of latent heat induced by the magnetic transformation of HSM.…”

Effect of Cr on Lamellar Spacing and High-Temperature Stability in Eutectoid Steels

“…Therefore, refinement of λ cannot be explained by ΔT. Takahashi et al 13) reported that the refinement of λ associated with increased Cr contents occurs because Cr increases ΔH and decreases σ. Tajima et al 19) reported that the value of ΔH is not changed by increasing the Cr content. Therefore, it is considered that refinement of λ with increasing Cr content is attributable to the decrease in σ.…”