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叙述了连铸机浸入式水口内壁上结痂的起因。在连铸钢工艺后对石墨-氧化铝质浸入式水口壁进行了X射线荧光谱测量,结果揭示出了一个系列的浸入式水口Al、Si和Ca含量的变化。测量结果示出不考虑结痂厚度,由于内侵蚀使浸入式水口壁厚度减少,另外,在浸入式水口壁的钢水接触部位发现了Al、Si和Ca含量也发生了变化。在接触部位的Al、Si含量与其余侧壁相比增加了,这是浸入式水口侧壁接触钢水后扩散的结果,与此同时,在浸入式水口壁接触部位的Ca含量比其余壁的要低。测定结果表明浸入式水口Al、Si的含量随内侵蚀加剧而增加,同时,浸入式水口接触部位Ca的含量却减少。这个关系的重要性也证实了相关指标值较高。浸入式水口壁接触部位Ca的含量下降可以通过结痂含Ca量的增加来解释。当浸入式水口壁的内侵蚀加剧时,浸入式水口壁接触部位Ca的含量下降的同时,浸入式水口结痂的CaO量却增加了。同时,在其它系列的浸入式水口壁上没有测出含量变化和扩散现象。其它系列的水口壁厚度也没有变化,这些证实了没有发生内侵蚀。只有对浸入式水口结痂和浸入式水口壁进行详细研究后,内侵蚀和浸入式水口壁Al、Si和Ca含量之间的关系才能被确定下来。这项研究需要大量圆形连铸机所用水口试样。
Describes the cause of scab on the inner wall of the continuous casting machine immersed nozzle. X-ray fluorescence measurements of the graphite-alumina submerged nozzle wall after the continuous casting process revealed a series of changes in the contents of Al, Si and Ca in the submerged entry nozzle. The results of the measurements show that the thickness of the submerged nozzle wall is reduced due to internal erosion, irrespective of the thickness of the scab, and Al, Si, and Ca contents are also found in the molten steel contact portion of the submerged nozzle wall. The contents of Al and Si at the contact sites increased compared to the remaining sidewalls as a result of diffusion of the immersion nozzle sidewalls after contact with the molten steel while at the same time the Ca content at the contact points of the submerged nozzle wall low. The results show that the content of Al and Si in submerged entry nozzle increases with the increase of inner erosion, meanwhile, the content of Ca in submerged entry nozzle decreases. The importance of this relationship also confirms the higher value of relevant indicators. The decrease in the Ca content at the contact point of the submerged nozzle wall can be explained by the increase of the Ca content in the scab. When the inner erosion of the immersion nozzle wall intensifies, the content of Ca in the contact part of the immersion nozzle wall decreases while the amount of CaO in the immersion nozzle crust increases. At the same time, no changes in content and diffusion were detected on other series of submerged nozzle walls. Other series of nozzle wall thickness has not changed, these confirmed the absence of internal erosion. Only after a detailed study of the scab and submerged nozzle wall of the submerged nozzle can the relationship between the inner erosion and the submerged nozzle wall Al, Si and Ca be determined. This study required a large number of nozzle samples for round caster.