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化学工业中合成氨一段转化炉炉管采用HK-40合金离心铸造,其主要成分为0.40%C、25%Cr,20%Ni。在运行中常常由于个别炉管无规则损坏引起整个装置意外停车,造成很大经济损失。所以,其残余寿命的推算就成为国内外比较关注的问题。本文根据我们时国内不同规模、不同炉型的七个转化炉使用不同时间后的炉管进行解剖分析,研究了炉管在高温使用后组织变化对持久性能的影响,探索了炉管残余寿命的推算方法。
In the chemical industry, a first-stage converter tube of synthetic ammonia is centrifugally cast by HK-40 alloy and its main components are 0.40% C, 25% Cr and 20% Ni. In operation, it is often caused by the random damage of individual tubes, which causes the entire device to stop unexpectedly, resulting in great economic losses. Therefore, the calculation of the residual life has become a more concerned issue at home and abroad. In this paper, we use different time after seven furnaces of different sizes and different furnaces in our country were used to conduct anatomical analysis. The influence of the microstructure changes on the long-term performance of the furnace after high temperature was studied, and the residual life of the furnace tubes Calculation method.