The strength of panel sheets can be increased by 2–3 times after hot stamping, and for high quality stamped sheets, uniform cooling rate on the die face to quench is needed. However, it difficult water channels, commonly used stamping dies, dissipate heat evenly. In addition, dies are easily corroded contact with at temperature. Thus, this study considers air quenching process. airflow applied ...

Thin layer drying of Russian olive (Elaeagnusan gastifolial L.) fruit using a hot air dryer in order to calculate effective moisture diffusivity, activation energy and energy consumption has been evaluated in this article. The selected variables included three levels of air velocity of 0.5, 1 and 1.5 m/s and three air temperature levels of 50, 60 and 70°C. Increased air temperature...

The development of grain-boundary cavitation in hot-pressed A1203 both during flexural creep and tress-free annealing in air has been studied. Creep damage accumulation in driven both by the applied stress, and by internal gas pressure in the cavities. The internal pressure results from gas trapped during hot pressing, and from gas-generating chemical reactions active during testing. At machine...

This article discusses the existing calculation of heat for a coal-fired hot-blast furnace. By utilizing the standard method of heat calculation for boilers, considering the relation between the theoretical combustion temperature and the excess air coefficient of the boiler, combining some operational parameters of a coal-fired powder hot-blast furnace, the heat calculation of iron ore concentr...