双ロール式連鋳機におけるロール/凝固シェル間熱伝達係数の算定

概要

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Strip casting experiments on type 304 stainless steel have been carried out in a steel twin-roll caster with rolls 300mm in diameter and 80mm wide. The casting speed was 6.6∿8.0m/min. Thickness of the strips was about 2.4mm. Roll temperature was measured at 1mm deep from outer surface of the roll during casting. Abnormal acceleration behavior of temperature change was detected. The annomalous acceleration of the thermo-electromotive force is caused by reduction in solidified shell thickness during squeezing. Calculation by finite difference method agreed with the result of temperature measurements. Simulation revealed that the heat transfer coefficients are, respectively, 2.5∿4.2 and 10∿16.7kW/m^2K before and after squeezing.
社団法人日本鉄鋼協会の論文
1993-06-01