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- W2379729789 abstract "Comprehensive analysis and evaluation of a conversion tube in a large ammonia synthesized apparatus was carried out after service for one million hours by chemical composition analysis,electron microprobe analysis,color penetration testing analysis,macro and micro structure analysis,room-temperature and high-temperature mechanical properties analysis and high-temperature durable property analysis.The results show that the chemical composition meets the technical requirements,the macro and micro structures are normal,and the corrosion of inner and outer surface is slight.The residual life of the tube is much greater than 2.2×104 hours by fitting extrapolation of durable high temperature property in the L-M curve.Although HK40,the material of the furnace tube,meets the technological requirements,but the thicker wall affects the thermal efficiency.At the same time,the smaller internal diameter limits the catalyst and flow.So ZG50Ni35Cr25NbM is a good choice for increasing efficiency in the future design." @default.
- W2379729789 created "2016-06-24" @default.
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- W2379729789 date "2010-01-01" @default.
- W2379729789 modified "2023-09-25" @default.
- W2379729789 title "Analysis and Evaluation of Microstructures and Properties of Conversion Tube" @default.
- W2379729789 hasPublicationYear "2010" @default.
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