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3.热顶铸造热顶铸造如图9所示,是在矮结晶器的上面安装带有热顶的,由耐火绝热材料(马利那文特)制的贮槽,不使用旧式的浮标漏斗,分配流盘和贮槽的熔体皆在保持同一水平的情况下进行铸造的,(也叫作水平铸造)热顶铸造有下列优点.(1)能降低铸模的有效高度(从熔体接触铸模点到接触直接冷却水间的距离),这样可使铸锭表面光滑,减少铸锭表面偏析;(2)因为水平铸造,所以熔体面平稳,不卷入氧化物;(3)由于不使
3. Hot Top Casting Hot top casting, as shown in Figure 9, is the installation of a tank top made of refractory and heat insulating material (Malinavent) on top of the lower mold without the use of an old buoy funnel (Also known as horizontal casting) hot-top casting has the following advantages. (1) can reduce the effective mold height (from the melt contact The distance from the mold point to the contact with the direct cooling water), so that the surface of the ingot is smooth and the surface segregation of the ingot is reduced; (2) because of the horizontal casting, the melt surface is smooth and not entangled with oxide; (3) Make