Lubrication Phenomena in a Mold and Optimum Mold Oscillation Mode in High-speed Casting

Inflow Behavior Observation of Molten Mold Powder between Mold and Solidified Shell by Continuous Casting Simulator Using Sn-Pb Alloy and Stearic Acid.

“…As the result, the direction of the load on the mold changed and the load on the mold increased rapidly when time changed from t n to t p period. These inclinations corresponded with the results measured the friction force between mold and solidified shell in continuous casting machine in industrial steel plant by Mizukami et al 2) Therefore, it was induced that the load on the mold between mold and solidified shell in the experimental apparatus could simulate the friction force between mold and solidified shell in the continuous casting machine of steel plant. Then friction force between mold and solidified shell per unit of contacted area, DF/S, is defined as follows in this paper.…”

“…Koichi TSUTSUMI, Jun-ichi OHTAKE 1) and Mitsutaka HINO 2) Formerly Graduate School of Engineering, Tohoku University. Now at Materials & Processing Research Center, NKK Corporation, 1 Kokan-cho, Fukuyama, Hiroshima-Prf., 721-8510 Japan.…”

“…After that, Mizukami et al 2) and Suzuki et al 3) researched various oscillation waves and developed non-sinusoidal (non-sin.) oscillation from sinusoidal (sin.)…”

Initial Solidification Control of Continuous Casting Using Electromagnetic Oscillation Method

“…Inflow of flux is presumably generated mainly during the PS period, 8,9) and the compression of initial solidified shell is presumably generated mainly during the NS period. 2,5) Therefore, the timing of actuating the lower coil and the upper coil should be synchronized with the mold oscillation.…”

“…Increased casting speed, however, decreases the inflow volume of mold flux to induce insufficient lubrication between the mold and the solidified shell. [1][2][3][4] Furthermore, high speed casting reduces the time for negative strip, which tends to induce insufficient strength of the solidified shell 5) so that the current process should have a limit in increasing the casting speed. Consequently, further increase in the casting speed needs the increase in the lubrication between the mold and the solidified shell, and also needs the increase in the strength of initial solidified shell.…”