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Measurement and Characterization of the Apparent Viscosity of Fe–C Melts during Solidification

机译：凝固过程中Fe–C熔体表观粘度的测量和表征

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摘要

The rheology of Fe–C melts during solidification can give important insight into the process operations and product quality of the resulting alloys. Here, we investigated the apparent viscosity of Fe–C melts during solidification. The testing spindle of the traditional rotation method for measuring the viscosity of liquids was improved so that it could be used to measure the apparent viscosity of Fe–C melts during solidification. Further, the apparent viscosity of Al_(2)O_(3) particles in methyl silicon oil, a representative liquid-solid slurry system, was measured. The effects of the particle fraction, particle shape and particle size on the apparent viscosity of the slurry were examined and the viability of a viscosity prediction model was tested. Finally, the apparent viscosity of Fe–C melts during solidification was measured. Our results showed that the apparent viscosity of Fe–C melts during solidification increased with increasing cooling rate and decreasing shear rate. The effect of precipitated particle structures on the apparent viscosity of Fe–C melts during solidification was similar to the effect that Al_(2)O_(3) particles had on the methyl silicon oil–Al_(2)O_(3) particle system. The viscosity model to predict the apparent viscosity of Fe–C melts under different solidification conditions was proposed.
机译：凝固过程中Fe–C熔体的流变学可以使您深入了解所制合金的工艺操作和产品质量。在这里，我们研究了凝固过程中Fe–C熔体的表观粘度。改进了用于测量液体粘度的传统旋转方法的测试主轴，使其可用于测量凝固过程中Fe–C熔体的表观粘度。此外，测量了在代表性的液-固浆料体系甲基硅油中的Al_（2）O_（3）颗粒的表观粘度。检查了颗粒分数，颗粒形状和粒度对浆料表观粘度的影响，并测试了粘度预测模型的可行性。最后，测量了凝固过程中Fe–C熔体的表观粘度。我们的结果表明，凝固过程中Fe–C熔体的表观粘度随冷却速率的增加和剪切速率的降低而增加。凝固过程中沉淀的颗粒结构对Fe–C熔体表观粘度的影响类似于Al_（2）O_（3）颗粒对甲基硅油–Al_（2）O_（3）颗粒系统的影响。提出了用于预测不同凝固条件下Fe–C熔体表观粘度的粘度模型。

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