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首页> 外文期刊>Engineering failure analysis >Damage of heat-resistant castings in a carburizing furnace
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Damage of heat-resistant castings in a carburizing furnace

机译：渗碳炉中耐热铸件的损坏

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摘要

The study reviews typical damages occurring in heat-resistant castings used in box-type carburizing furnaces. The analysis was mainly based on a visual examination of elements withdrawn from operation. Furnace heat-resistant equipment can be divided into construction elements installed permanently in a furnace chamber (e.g. radiant tubs, fans, rollers) and elements utilized to set or load and unload parts to be carburized (e.g. grates, fixtures, basket). Depending on the function performed by a particular casting, its degradation process varies. The final consequence of the wear and tear of a casting is above all a decohesion of its walls that results from an influence of carburizing atmosphere, or from the combined effect of carburizing atmosphere and thermal fatigue. The effect of creep, that may occur in castings during their use as a result of the load of the structure or/and of the carburized parts, was not observed to be a direct cause of the damages.
机译：该研究回顾了在箱式渗碳炉中使用的耐热铸件中发生的典型损伤。该分析主要是基于目测检查从操作中撤出的元素。炉子的耐热设备可分为永久安装在炉室内的建筑构件（例如辐射桶，风扇，滚筒）和用来放置或装卸要渗碳的零件的构件（例如炉排，固定装置，篮子）。根据特定铸件执行的功能，其降解过程会有所不同。铸件磨损的最终结果首先是其壁的脱粘，这是由于渗碳气氛的影响，或者渗碳气氛和热疲劳的综合作用所致。没有观察到铸件在使用过程中由于结构或/和渗碳零件的负载而可能发生的蠕变效应，不是造成损坏的直接原因。

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