Зависимость профиля ленты от некоторых технологических параметров процесса двухвалковой быстрой закалки -прокатки расплава

Abstract

Целью данной работы является исследование влияния некоторых технологических параметров на профиль ленты при двухвалковом методе быстрой закалки расплава.

The relation of the strip contour and some technological parameters of the process of two- roll melt rapid quenching-and-rolling is considered. It is shown that nozzle geometry in two-roll melt rapid quenching is one of the most important factors influencing temperature distribution in a melt bath and heat profile of a roll sleeve. The nozzle length and melt flow rate increase results in the increase of inhomogenuity of flow and the loss of its longitudinal stability. The application of various methods of equalizing speed variations of the melt flow out of nozzle reduces the non-uniformity of temperature distribution in the bath, stabilizing the heat profile of the roll sleeve and contributing to producing an even strip. It is shown that the increase of the distributing nozzle length will decrease average temperature of the sleeve and facilitate its more uniform heating along the longitudinal axis. It has been established that optimization of the sleeve thickness, the diameter and the length of the roll will provide the improvement of the cross-section and planeness of the rapid quenched strip.