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Failure Analysis of the Openings of Copper Converter in Sarcheshmeh Complex after Service Exposure
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نویسنده
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Mohammadnezhad .M ,Javaheri .V ,Shamanian .M ,Naseri .M
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منبع
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international journal of iron and steel society of iran - 2011 - دوره : 8 - شماره : 2 - صفحه:27 -30
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چکیده
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In the present study, the austenitic heat resistant cast steel was investigated in as-cast conditions and after beingused in copper converter parts. specimens were cut from an ex-service failed converter part which has been agedfor 1900 h. the openings of copper converter in sarchashmeh copper complex in iran are made of a heat resistingaustenitic steel fe-25cr-15ni. microstructural changes after working period were studied via optical microscopyand scanning electron microscopy equipped with energy dispersive spectrum. the effect of temperature and carbondiffusion on the microstructure, chromium-rich carbides, the chromium carbides transformation to sigma phaseand other precipitates during service condition were discussed. the diffusion of so2 and copper and formation ofsub layer decrease the mechanical properties. the formation of sigma phase can be lead to degrade the ductilityand toughness.
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کلیدواژه
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Microstructure evolution ,Heat resisting steel ,Fe-25Cr-15Ni alloy ,Fracture mechanism ,sulphidation
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آدرس
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isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران, iran university of industries and mines, Department of Material Engineering, Iran University of Industries and Mines, Tehran 1439-5518, Iran, ایران, isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران, Unit Research and Development of Isfahan Casting Industrial (ICI), ایران
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Authors
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